Wrap C APIs with pragmas enforcing -Werror=strict-prototypes

[dexonsmith]

Summary

Force -Werror=strict-prototypes so that C API tests fail to compile if
we add a non-prototype declaration. This should help avoid regressions
like bddecba4b333f7772029b4937d2c34f9f2fda6ca was fixing.

[dexonsmith]

Note that we have C files including these headers in llvm/tools/llvm-c-test and clang/tools/c-index-test, and I tested that dropping a (void) to just () triggers the error when compiling those.

[aaron.ballman]

clang/include/clang-c/ExternC.h

19–20

I think this needs some extra compiler guards, unfortunately. I don't think MSVC supports _Pragma (IIRC, they rather oddly decided to call it __pragma instead). Do we want to restrict this pragma to only clang compilers? Do we need to do something to support GCC as well?

[dexonsmith]

Adding guards for _MSC_VER.

[dexonsmith]

clang/include/clang-c/ExternC.h

19–20

Thanks for pointing this out; guarded against _MSC_VER in the updated diff.

Supporting GCC as a follow-up sounds nice to me if someone is interested in sorting that out, but covering it in Clang like this is sufficient to get our bots to reject commits that regress.

[dexonsmith]

s/C_STRING_PROTOTYPES_/C_STRICT_PROTOTYPES_/ to fix some typos.

[Bigcheese]

lgtm as long as other compilers don't warn on unknown pragmas by default.

[dexonsmith]

In D70285#1752164, @Bigcheese wrote:

lgtm as long as other compilers don't warn on unknown pragmas by default.

godbolt.org says that GCC doesn't have -Wunknown-pragmas by default, but it is in -Wall. I'd better guard this more closely with __clang__.

[dexonsmith]

In D70285#1752361, @dexonsmith wrote:

In D70285#1752164, @Bigcheese wrote:

lgtm as long as other compilers don't warn on unknown pragmas by default.

godbolt.org says that GCC doesn't have -Wunknown-pragmas by default, but it is in -Wall. I'd better guard this more closely with __clang__.

Pushed as 8c48405069085a2c8b6b80816eda99e5dad31fc1 with this fixup.

clang/include/clang-c/BuildSystem.h

 /*==-- clang-c/BuildSystem.h - Utilities for use by build systems -*- C -*-===*\
 |*                                                                            *|
 |* Part of the LLVM Project, under the Apache License v2.0 with LLVM          *|
 |* Exceptions.                                                                *|
 |* See https://llvm.org/LICENSE.txt for license information.                  *|
 |* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception                    *|
 |*                                                                            *|
 |*===----------------------------------------------------------------------===*|
 |*                                                                            *|
 |* This header provides various utilities for use by build systems.           *|
 |*                                                                            *|
 \*===----------------------------------------------------------------------===*/
 
 #ifndef LLVM_CLANG_C_BUILDSYSTEM_H
 #define LLVM_CLANG_C_BUILDSYSTEM_H
 
-#include "clang-c/Platform.h"
 #include "clang-c/CXErrorCode.h"
 #include "clang-c/CXString.h"
+#include "clang-c/ExternC.h"
+#include "clang-c/Platform.h"
 
-#ifdef __cplusplus
-extern "C" {
-#endif
+LLVM_CLANG_C_EXTERN_C_BEGIN
 
 /**
  * \defgroup BUILD_SYSTEM Build system utilities
  * @{
  */
 
 /**
  * Return the timestamp for use with Clang's

  * Dispose a \c CXModuleMapDescriptor object.
  */
 CINDEX_LINKAGE void clang_ModuleMapDescriptor_dispose(CXModuleMapDescriptor);
 
 /**
  * @}
  */
 
-#ifdef __cplusplus
-}
-#endif
+LLVM_CLANG_C_EXTERN_C_END
 
 #endif /* CLANG_C_BUILD_SYSTEM_H */
 

clang/include/clang-c/CXCompilationDatabase.h

 |* This header provides a public interface to use CompilationDatabase without *|
 |* the full Clang C++ API.                                                    *|
 |*                                                                            *|
 \*===----------------------------------------------------------------------===*/
 
 #ifndef LLVM_CLANG_C_CXCOMPILATIONDATABASE_H
 #define LLVM_CLANG_C_CXCOMPILATIONDATABASE_H
 
-#include "clang-c/Platform.h"
 #include "clang-c/CXString.h"
+#include "clang-c/ExternC.h"
+#include "clang-c/Platform.h"
 
-#ifdef __cplusplus
-extern "C" {
-#endif
+LLVM_CLANG_C_EXTERN_C_BEGIN
 
 /** \defgroup COMPILATIONDB CompilationDatabase functions
  * \ingroup CINDEX
  *
  * @{
  */
 
 /**

  */
 CINDEX_LINKAGE CXString
 clang_CompileCommand_getMappedSourceContent(CXCompileCommand, unsigned I);
 
 /**
  * @}
  */
 
-#ifdef __cplusplus
-}
-#endif
+LLVM_CLANG_C_EXTERN_C_END
+
 #endif
 

clang/include/clang-c/CXErrorCode.h

 /*===-- clang-c/CXErrorCode.h - C Index Error Codes  --------------*- C -*-===*\
 |*                                                                            *|
 |* Part of the LLVM Project, under the Apache License v2.0 with LLVM          *|
 |* Exceptions.                                                                *|
 |* See https://llvm.org/LICENSE.txt for license information.                  *|
 |* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception                    *|
 |*                                                                            *|
 |*===----------------------------------------------------------------------===*|
 |*                                                                            *|
 |* This header provides the CXErrorCode enumerators.                          *|
 |*                                                                            *|
 \*===----------------------------------------------------------------------===*/
 
 #ifndef LLVM_CLANG_C_CXERRORCODE_H
 #define LLVM_CLANG_C_CXERRORCODE_H
 
+#include "clang-c/ExternC.h"
 #include "clang-c/Platform.h"
 
-#ifdef __cplusplus
-extern "C" {
-#endif
+LLVM_CLANG_C_EXTERN_C_BEGIN
 
 /**
  * Error codes returned by libclang routines.
  *
  * Zero (\c CXError_Success) is the only error code indicating success.  Other
  * error codes, including not yet assigned non-zero values, indicate errors.
  */
 enum CXErrorCode {
enum CXErrorCode {
   CXError_InvalidArguments = 3,
 
   /**
    * An AST deserialization error has occurred.
    */
   CXError_ASTReadError = 4
 };
 
-#ifdef __cplusplus
-}
-#endif
+LLVM_CLANG_C_EXTERN_C_END
+
 #endif
 

clang/include/clang-c/CXString.h

 /*===-- clang-c/CXString.h - C Index strings  --------------------*- C -*-===*\
 |*                                                                            *|
 |* Part of the LLVM Project, under the Apache License v2.0 with LLVM          *|
 |* Exceptions.                                                                *|
 |* See https://llvm.org/LICENSE.txt for license information.                  *|
 |* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception                    *|
 |*                                                                            *|
 |*===----------------------------------------------------------------------===*|
 |*                                                                            *|
 |* This header provides the interface to C Index strings.                     *|
 |*                                                                            *|
 \*===----------------------------------------------------------------------===*/
 
 #ifndef LLVM_CLANG_C_CXSTRING_H
 #define LLVM_CLANG_C_CXSTRING_H
 
+#include "clang-c/ExternC.h"
 #include "clang-c/Platform.h"
 
-#ifdef __cplusplus
-extern "C" {
-#endif
+LLVM_CLANG_C_EXTERN_C_BEGIN
 
 /**
  * \defgroup CINDEX_STRING String manipulation routines
  * \ingroup CINDEX
  *
  * @{
  */
 

  * Free the given string set.
  */
 CINDEX_LINKAGE void clang_disposeStringSet(CXStringSet *set);
 
 /**
  * @}
  */
 
-#ifdef __cplusplus
-}
-#endif
+LLVM_CLANG_C_EXTERN_C_END
+
 #endif
 

clang/include/clang-c/Documentation.h

 |* This header provides a supplementary interface for inspecting              *|
 |* documentation comments.                                                    *|
 |*                                                                            *|
 \*===----------------------------------------------------------------------===*/
 
 #ifndef LLVM_CLANG_C_DOCUMENTATION_H
 #define LLVM_CLANG_C_DOCUMENTATION_H
 
+#include "clang-c/ExternC.h"
 #include "clang-c/Index.h"
 
-#ifdef __cplusplus
-extern "C" {
-#endif
+LLVM_CLANG_C_EXTERN_C_BEGIN
 
 /**
  * \defgroup CINDEX_COMMENT Comment introspection
  *
  * The routines in this group provide access to information in documentation
  * comments. These facilities are distinct from the core and may be subject to
  * their own schedule of stability and deprecation.
  *

  * \returns string containing an XML document.
  */
 CINDEX_LINKAGE CXString clang_FullComment_getAsXML(CXComment Comment);
 
 /**
  * @}
  */
 
-
-#ifdef __cplusplus
-}
-#endif
+LLVM_CLANG_C_EXTERN_C_END
 
 #endif /* CLANG_C_DOCUMENTATION_H */
 

clang/include/clang-c/ExternC.h

+/*===- clang-c/ExternC.h - Wrapper for 'extern "C"' ---------------*- C -*-===*\
+|*                                                                            *|
+|* Part of the LLVM Project, under the Apache License v2.0 with LLVM          *|
+|* Exceptions.                                                                *|
+|* See https://llvm.org/LICENSE.txt for license information.                  *|
+|* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception                    *|
+|*                                                                            *|
+|*===----------------------------------------------------------------------===*|
+|*                                                                            *|
+|* This file defines an 'extern "C"' wrapper.                                 *|
+|*                                                                            *|
+\*===----------------------------------------------------------------------===*/
+
+#ifndef LLVM_CLANG_C_EXTERN_C_H
+#define LLVM_CLANG_C_EXTERN_C_H
+
+#ifdef _MSC_VER
+#define LLVM_CLANG_C_STRING_PROTOTYPES_BEGIN
+#define LLVM_CLANG_C_STRING_PROTOTYPES_END
+#else
+#define LLVM_CLANG_C_STRING_PROTOTYPES_BEGIN                                   \
+  _Pragma("clang diagnostic push")                                             \
+      _Pragma("clang diagnostic error \"-Wstrict-prototypes\"")
+#define LLVM_CLANG_C_STRING_PROTOTYPES_END _Pragma("clang diagnostic pop")
+#endif
+
+#ifdef __cplusplus
+#define LLVM_CLANG_C_EXTERN_C_BEGIN                                            \
+  extern "C" {                                                                 \
+  LLVM_CLANG_C_STRING_PROTOTYPES_BEGIN
+#define LLVM_CLANG_C_EXTERN_C_END                                              \
+  LLVM_CLANG_C_STRING_PROTOTYPES_END                                           \
+  }
+#else
+#define LLVM_CLANG_C_EXTERN_C_BEGIN LLVM_CLANG_C_STRING_PROTOTYPES_BEGIN
+#define LLVM_CLANG_C_EXTERN_C_END LLVM_CLANG_C_STRING_PROTOTYPES_END
+#endif
+
+#endif

clang/include/clang-c/FatalErrorHandler.h

 /*===-- clang-c/FatalErrorHandler.h - Fatal Error Handling --------*- C -*-===*\
 |*                                                                            *|
 |* Part of the LLVM Project, under the Apache License v2.0 with LLVM          *|
 |* Exceptions.                                                                *|
 |* See https://llvm.org/LICENSE.txt for license information.                  *|
 |* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception                    *|
 |*                                                                            *|
 \*===----------------------------------------------------------------------===*/
 
 #ifndef LLVM_CLANG_C_FATAL_ERROR_HANDLER_H
 #define LLVM_CLANG_C_FATAL_ERROR_HANDLER_H
 
-#ifdef __cplusplus
-extern "C" {
-#endif
+#include "clang-c/ExternC.h"
+
+LLVM_CLANG_C_EXTERN_C_BEGIN
 
 /**
  * Installs error handler that prints error message to stderr and calls abort().
  * Replaces currently installed error handler (if any).
  */
 void clang_install_aborting_llvm_fatal_error_handler(void);
 
 /**
  * Removes currently installed error handler (if any).
  * If no error handler is intalled, the default strategy is to print error
  * message to stderr and call exit(1).
  */
 void clang_uninstall_llvm_fatal_error_handler(void);
 
-#ifdef __cplusplus
-}
-#endif
+LLVM_CLANG_C_EXTERN_C_END
+
 #endif

clang/include/clang-c/Index.h

 |*                                                                            *|
 \*===----------------------------------------------------------------------===*/
 
 #ifndef LLVM_CLANG_C_INDEX_H
 #define LLVM_CLANG_C_INDEX_H
 
 #include <time.h>
 
-#include "clang-c/Platform.h"
+#include "clang-c/BuildSystem.h"
 #include "clang-c/CXErrorCode.h"
 #include "clang-c/CXString.h"
-#include "clang-c/BuildSystem.h"
+#include "clang-c/ExternC.h"
+#include "clang-c/Platform.h"
 
 /**
  * The version constants for the libclang API.
  * CINDEX_VERSION_MINOR should increase when there are API additions.
  * CINDEX_VERSION_MAJOR is intended for "major" source/ABI breaking changes.
  *
  * The policy about the libclang API was always to keep it source and ABI
  * compatible, thus CINDEX_VERSION_MAJOR is expected to remain stable.
#define CINDEX_VERSION_STRINGIZE_(major, minor)   \
     #major"."#minor
 #define CINDEX_VERSION_STRINGIZE(major, minor)    \
     CINDEX_VERSION_STRINGIZE_(major, minor)
 
 #define CINDEX_VERSION_STRING CINDEX_VERSION_STRINGIZE( \
     CINDEX_VERSION_MAJOR,                               \
     CINDEX_VERSION_MINOR)
 
-#ifdef __cplusplus
-extern "C" {
-#endif
+LLVM_CLANG_C_EXTERN_C_BEGIN
 
 /** \defgroup CINDEX libclang: C Interface to Clang
  *
  * The C Interface to Clang provides a relatively small API that exposes
  * facilities for parsing source code into an abstract syntax tree (AST),
  * loading already-parsed ASTs, traversing the AST, associating
  * physical source locations with elements within the AST, and other
  * facilities that support Clang-based development tools.

 /**
  * @}
  */
 
 /**
  * @}
  */
 
-#ifdef __cplusplus
-}
-#endif
+LLVM_CLANG_C_EXTERN_C_END
+
 #endif

clang/include/clang-c/Platform.h

 /*===-- clang-c/Platform.h - C Index platform decls   -------------*- C -*-===*\
 |*                                                                            *|
 |* Part of the LLVM Project, under the Apache License v2.0 with LLVM          *|
 |* Exceptions.                                                                *|
 |* See https://llvm.org/LICENSE.txt for license information.                  *|
 |* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception                    *|
 |*                                                                            *|
 |*===----------------------------------------------------------------------===*|
 |*                                                                            *|
 |* This header provides platform specific macros (dllimport, deprecated, ...) *|
 |*                                                                            *|
 \*===----------------------------------------------------------------------===*/
 
 #ifndef LLVM_CLANG_C_PLATFORM_H
 #define LLVM_CLANG_C_PLATFORM_H
 
-#ifdef __cplusplus
-extern "C" {
-#endif
+#include "clang-c/ExternC.h"
+
+LLVM_CLANG_C_EXTERN_C_BEGIN
 
 /* MSVC DLL import/export. */
 #ifdef _MSC_VER
   #ifdef _CINDEX_LIB_
     #define CINDEX_LINKAGE __declspec(dllexport)
   #else
     #define CINDEX_LINKAGE __declspec(dllimport)
   #endif
 #else
   #define CINDEX_LINKAGE
 #endif
 
 #ifdef __GNUC__
   #define CINDEX_DEPRECATED __attribute__((deprecated))
 #else
   #ifdef _MSC_VER
     #define CINDEX_DEPRECATED __declspec(deprecated)
   #else
     #define CINDEX_DEPRECATED
   #endif
 #endif
 
-#ifdef __cplusplus
-}
-#endif
+LLVM_CLANG_C_EXTERN_C_END
+
 #endif

llvm/include/llvm-c/Analysis.h

 |* with C++ due to name mangling. So in addition to C, this interface enables *|
 |* tools written in such languages.                                           *|
 |*                                                                            *|
 \*===----------------------------------------------------------------------===*/
 
 #ifndef LLVM_C_ANALYSIS_H
 #define LLVM_C_ANALYSIS_H
 
+#include "llvm-c/ExternC.h"
 #include "llvm-c/Types.h"
 
-#ifdef __cplusplus
-extern "C" {
-#endif
+LLVM_C_EXTERN_C_BEGIN
 
 /**
  * @defgroup LLVMCAnalysis Analysis
  * @ingroup LLVMC
  *
  * @{
  */
 
/* Open up a ghostview window that displays the CFG of the current function.
    Useful for debugging. */
 void LLVMViewFunctionCFG(LLVMValueRef Fn);
 void LLVMViewFunctionCFGOnly(LLVMValueRef Fn);
 
 /**
  * @}
  */
 
-#ifdef __cplusplus
-}
-#endif
+LLVM_C_EXTERN_C_END
 
 #endif

llvm/include/llvm-c/BitReader.h

 |* with C++ due to name mangling. So in addition to C, this interface enables *|
 |* tools written in such languages.                                           *|
 |*                                                                            *|
 \*===----------------------------------------------------------------------===*/
 
 #ifndef LLVM_C_BITREADER_H
 #define LLVM_C_BITREADER_H
 
+#include "llvm-c/ExternC.h"
 #include "llvm-c/Types.h"
 
-#ifdef __cplusplus
-extern "C" {
-#endif
+LLVM_C_EXTERN_C_BEGIN
 
 /**
  * @defgroup LLVMCBitReader Bit Reader
  * @ingroup LLVMC
  *
  * @{
  */
 
LLVMBool LLVMGetBitcodeModule(LLVMMemoryBufferRef MemBuf, LLVMModuleRef *OutM,
                               char **OutMessage);
 
 LLVMBool LLVMGetBitcodeModule2(LLVMMemoryBufferRef MemBuf, LLVMModuleRef *OutM);
 
 /**
  * @}
  */
 
-#ifdef __cplusplus
-}
-#endif
+LLVM_C_EXTERN_C_END
 
 #endif

llvm/include/llvm-c/BitWriter.h

 |* with C++ due to name mangling. So in addition to C, this interface enables *|
 |* tools written in such languages.                                           *|
 |*                                                                            *|
 \*===----------------------------------------------------------------------===*/
 
 #ifndef LLVM_C_BITWRITER_H
 #define LLVM_C_BITWRITER_H
 
+#include "llvm-c/ExternC.h"
 #include "llvm-c/Types.h"
 
-#ifdef __cplusplus
-extern "C" {
-#endif
+LLVM_C_EXTERN_C_BEGIN
 
 /**
  * @defgroup LLVMCBitWriter Bit Writer
  * @ingroup LLVMC
  *
  * @{
  */
 

 
 /** Writes a module to a new memory buffer and returns it. */
 LLVMMemoryBufferRef LLVMWriteBitcodeToMemoryBuffer(LLVMModuleRef M);
 
 /**
  * @}
  */
 
-#ifdef __cplusplus
-}
-#endif
+LLVM_C_EXTERN_C_END
 
 #endif

llvm/include/llvm-c/Comdat.h

 /*===-- llvm-c/Comdat.h - Module Comdat C Interface -------------*- C++ -*-===*\
 |*                                                                            *|
 |* Part of the LLVM Project, under the Apache License v2.0 with LLVM          *|
 |* Exceptions.                                                                *|
 |* See https://llvm.org/LICENSE.txt for license information.                  *|
 |* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception                    *|
 |*                                                                            *|
 |*===----------------------------------------------------------------------===*|
 |*                                                                            *|
 |* This file defines the C interface to COMDAT.                               *|
 |*                                                                            *|
 \*===----------------------------------------------------------------------===*/
 
 #ifndef LLVM_C_COMDAT_H
 #define LLVM_C_COMDAT_H
 
+#include "llvm-c/ExternC.h"
 #include "llvm-c/Types.h"
 
-#ifdef __cplusplus
-extern "C" {
-#endif
+LLVM_C_EXTERN_C_BEGIN
 
 typedef enum {
   LLVMAnyComdatSelectionKind,        ///< The linker may choose any COMDAT.
   LLVMExactMatchComdatSelectionKind, ///< The data referenced by the COMDAT must
                                      ///< be the same.
   LLVMLargestComdatSelectionKind,    ///< The linker will choose the largest
                                      ///< COMDAT.
   LLVMNoDuplicatesComdatSelectionKind, ///< No other Module may specify this

 
 /*
  * Set the conflict resolution selection kind for the Comdat.
  *
  * @see llvm::Comdat::setSelectionKind()
  */
 void LLVMSetComdatSelectionKind(LLVMComdatRef C, LLVMComdatSelectionKind Kind);
 
-#ifdef __cplusplus
-}
-#endif
+LLVM_C_EXTERN_C_END
 
 #endif

llvm/include/llvm-c/Core.h

 |* the LLVM intermediate representation.                                      *|
 |*                                                                            *|
 \*===----------------------------------------------------------------------===*/
 
 #ifndef LLVM_C_CORE_H
 #define LLVM_C_CORE_H
 
 #include "llvm-c/ErrorHandling.h"
+#include "llvm-c/ExternC.h"
 #include "llvm-c/Types.h"
 
-#ifdef __cplusplus
-extern "C" {
-#endif
+LLVM_C_EXTERN_C_BEGIN
 
 /**
  * @defgroup LLVMC LLVM-C: C interface to LLVM
  *
  * This module exposes parts of the LLVM library as a C API.
  *
  * @{
  */

 /**
  * @}
  */
 
 /**
  * @}
  */
 
-#ifdef __cplusplus
-}
-#endif
+LLVM_C_EXTERN_C_END
 
 #endif /* LLVM_C_CORE_H */

llvm/include/llvm-c/DebugInfo.h

 ///       changed without warning.
 ///
 //===----------------------------------------------------------------------===//
 
 #ifndef LLVM_C_DEBUGINFO_H
 #define LLVM_C_DEBUGINFO_H
 
 #include "llvm-c/Core.h"
+#include "llvm-c/ExternC.h"
 
-#ifdef __cplusplus
-extern "C" {
-#endif
+LLVM_C_EXTERN_C_BEGIN
 
 /**
  * Debug info flags.
  */
 typedef enum {
   LLVMDIFlagZero = 0,
   LLVMDIFlagPrivate = 1,
   LLVMDIFlagProtected = 2,

 
 /**
  * Obtain the enumerated type of a Metadata instance.
  *
  * @see llvm::Metadata::getMetadataID()
  */
 LLVMMetadataKind LLVMGetMetadataKind(LLVMMetadataRef Metadata);
 
-#ifdef __cplusplus
-} /* end extern "C" */
-#endif
+LLVM_C_EXTERN_C_END
 
 #endif

llvm/include/llvm-c/Disassembler.h

 |* LLVM provides an implementation of this interface.                         *|
 |*                                                                            *|
 \*===----------------------------------------------------------------------===*/
 
 #ifndef LLVM_C_DISASSEMBLER_H
 #define LLVM_C_DISASSEMBLER_H
 
 #include "llvm-c/DisassemblerTypes.h"
+#include "llvm-c/ExternC.h"
 
 /**
  * @defgroup LLVMCDisassembler Disassembler
  * @ingroup LLVMC
  *
  * @{
  */
 
-#ifdef __cplusplus
-extern "C" {
-#endif /* !defined(__cplusplus) */
+LLVM_C_EXTERN_C_BEGIN
 
 /**
  * Create a disassembler for the TripleName.  Symbolic disassembly is supported
  * by passing a block of information in the DisInfo parameter and specifying the
  * TagType and callback functions as described above.  These can all be passed
  * as NULL.  If successful, this returns a disassembler context.  If not, it
  * returns NULL. This function is equivalent to calling
  * LLVMCreateDisasmCPUFeatures() with an empty CPU name and feature set.

 size_t LLVMDisasmInstruction(LLVMDisasmContextRef DC, uint8_t *Bytes,
                              uint64_t BytesSize, uint64_t PC,
                              char *OutString, size_t OutStringSize);
 
 /**
  * @}
  */
 
-#ifdef __cplusplus
-}
-#endif /* !defined(__cplusplus) */
+LLVM_C_EXTERN_C_END
 
 #endif /* LLVM_C_DISASSEMBLER_H */

llvm/include/llvm-c/Error.h

 /*===------- llvm-c/Error.h - llvm::Error class C Interface -------*- C -*-===*\
 |*                                                                            *|
 |* Part of the LLVM Project, under the Apache License v2.0 with LLVM          *|
 |* Exceptions.                                                                *|
 |* See https://llvm.org/LICENSE.txt for license information.                  *|
 |* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception                    *|
 |*                                                                            *|
 |*===----------------------------------------------------------------------===*|
 |*                                                                            *|
 |* This file defines the C interface to LLVM's Error class.                   *|
 |*                                                                            *|
 \*===----------------------------------------------------------------------===*/
 
 #ifndef LLVM_C_ERROR_H
 #define LLVM_C_ERROR_H
 
-#ifdef __cplusplus
-extern "C" {
-#endif
+#include "llvm-c/ExternC.h"
+
+LLVM_C_EXTERN_C_BEGIN
 
 #define LLVMErrorSuccess 0
 
 /**
  * Opaque reference to an error instance. Null serves as the 'success' value.
  */
 typedef struct LLVMOpaqueError *LLVMErrorRef;
 

  */
 void LLVMDisposeErrorMessage(char *ErrMsg);
 
 /**
  * Returns the type id for llvm StringError.
  */
 LLVMErrorTypeId LLVMGetStringErrorTypeId(void);
 
-#ifdef __cplusplus
-}
-#endif
+LLVM_C_EXTERN_C_END
 
 #endif

llvm/include/llvm-c/ErrorHandling.h

 /*===-- llvm-c/ErrorHandling.h - Error Handling C Interface -------*- C -*-===*\
 |*                                                                            *|
 |* Part of the LLVM Project, under the Apache License v2.0 with LLVM          *|
 |* Exceptions.                                                                *|
 |* See https://llvm.org/LICENSE.txt for license information.                  *|
 |* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception                    *|
 |*                                                                            *|
 |*===----------------------------------------------------------------------===*|
 |*                                                                            *|
 |* This file defines the C interface to LLVM's error handling mechanism.      *|
 |*                                                                            *|
 \*===----------------------------------------------------------------------===*/
 
 #ifndef LLVM_C_ERROR_HANDLING_H
 #define LLVM_C_ERROR_HANDLING_H
 
-#ifdef __cplusplus
-extern "C" {
-#endif
+#include "llvm-c/ExternC.h"
+
+LLVM_C_EXTERN_C_BEGIN
 
 typedef void (*LLVMFatalErrorHandler)(const char *Reason);
 
 /**
  * Install a fatal error handler. By default, if LLVM detects a fatal error, it
  * will call exit(1). This may not be appropriate in many contexts. For example,
  * doing exit(1) will bypass many crash reporting/tracing system tools. This
  * function allows you to install a callback that will be invoked prior to the

 
 /**
  * Enable LLVM's built-in stack trace code. This intercepts the OS's crash
  * signals and prints which component of LLVM you were in at the time if the
  * crash.
  */
 void LLVMEnablePrettyStackTrace(void);
 
-#ifdef __cplusplus
-}
-#endif
+LLVM_C_EXTERN_C_END
 
 #endif

llvm/include/llvm-c/ExecutionEngine.h

 |* with C++ due to name mangling. So in addition to C, this interface enables *|
 |* tools written in such languages.                                           *|
 |*                                                                            *|
 \*===----------------------------------------------------------------------===*/
 
 #ifndef LLVM_C_EXECUTIONENGINE_H
 #define LLVM_C_EXECUTIONENGINE_H
 
+#include "llvm-c/ExternC.h"
 #include "llvm-c/Target.h"
 #include "llvm-c/TargetMachine.h"
 #include "llvm-c/Types.h"
 
-#ifdef __cplusplus
-extern "C" {
-#endif
+LLVM_C_EXTERN_C_BEGIN
 
 /**
  * @defgroup LLVMCExecutionEngine Execution Engine
  * @ingroup LLVMC
  *
  * @{
  */
 

 LLVMJITEventListenerRef LLVMCreateIntelJITEventListener(void);
 LLVMJITEventListenerRef LLVMCreateOProfileJITEventListener(void);
 LLVMJITEventListenerRef LLVMCreatePerfJITEventListener(void);
 
 /**
  * @}
  */
 
-#ifdef __cplusplus
-}
-#endif /* defined(__cplusplus) */
+LLVM_C_EXTERN_C_END
 
 #endif

llvm/include/llvm-c/ExternC.h

+/*===- llvm-c/ExternC.h - Wrapper for 'extern "C"' ----------------*- C -*-===*\
+|*                                                                            *|
+|* Part of the LLVM Project, under the Apache License v2.0 with LLVM          *|
+|* Exceptions.                                                                *|
+|* See https://llvm.org/LICENSE.txt for license information.                  *|
+|* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception                    *|
+|*                                                                            *|
+|*===----------------------------------------------------------------------===*|
+|*                                                                            *|
+|* This file defines an 'extern "C"' wrapper                                  *|
+|*                                                                            *|
+\*===----------------------------------------------------------------------===*/
+
+#ifndef LLVM_C_EXTERN_C_H
+#define LLVM_C_EXTERN_C_H
+
+#ifdef _MSC_VER
+#define LLVM_C_STRING_PROTOTYPES_BEGIN
+#define LLVM_C_STRING_PROTOTYPES_END
+#else
+#define LLVM_C_STRING_PROTOTYPES_BEGIN                                         \
+  _Pragma("clang diagnostic push")                                             \
+      _Pragma("clang diagnostic error \"-Wstrict-prototypes\"")
+#define LLVM_C_STRING_PROTOTYPES_END _Pragma("clang diagnostic pop")
+#endif
+
+#ifdef __cplusplus
+#define LLVM_C_EXTERN_C_BEGIN                                                  \
+  extern "C" {                                                                 \
+  LLVM_C_STRING_PROTOTYPES_BEGIN
+#define LLVM_C_EXTERN_C_END                                                    \
+  LLVM_C_STRING_PROTOTYPES_END                                                 \
+  }
+#else
+#define LLVM_C_EXTERN_C_BEGIN LLVM_C_STRING_PROTOTYPES_BEGIN
+#define LLVM_C_EXTERN_C_END LLVM_C_STRING_PROTOTYPES_END
+#endif
+
+#endif

llvm/include/llvm-c/IRReader.h

 /*===-- llvm-c/IRReader.h - IR Reader C Interface -----------------*- C -*-===*\
 |*                                                                            *|
 |* Part of the LLVM Project, under the Apache License v2.0 with LLVM          *|
 |* Exceptions.                                                                *|
 |* See https://llvm.org/LICENSE.txt for license information.                  *|
 |* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception                    *|
 |*                                                                            *|
 |*===----------------------------------------------------------------------===*|
 |*                                                                            *|
 |* This file defines the C interface to the IR Reader.                        *|
 |*                                                                            *|
 \*===----------------------------------------------------------------------===*/
 
 #ifndef LLVM_C_IRREADER_H
 #define LLVM_C_IRREADER_H
 
+#include "llvm-c/ExternC.h"
 #include "llvm-c/Types.h"
 
-#ifdef __cplusplus
-extern "C" {
-#endif
+LLVM_C_EXTERN_C_BEGIN
 
 /**
  * Read LLVM IR from a memory buffer and convert it into an in-memory Module
  * object. Returns 0 on success.
  * Optionally returns a human-readable description of any errors that
  * occurred during parsing IR. OutMessage must be disposed with
  * LLVMDisposeMessage.
  *
  * @see llvm::ParseIR()
  */
 LLVMBool LLVMParseIRInContext(LLVMContextRef ContextRef,
                               LLVMMemoryBufferRef MemBuf, LLVMModuleRef *OutM,
                               char **OutMessage);
 
-#ifdef __cplusplus
-}
-#endif
+LLVM_C_EXTERN_C_END
 
 #endif

llvm/include/llvm-c/Initialization.h

 |* which must be called before you can use the functionality provided by      *|
 |* the corresponding LLVM library.                                            *|
 |*                                                                            *|
 \*===----------------------------------------------------------------------===*/
 
 #ifndef LLVM_C_INITIALIZATION_H
 #define LLVM_C_INITIALIZATION_H
 
+#include "llvm-c/ExternC.h"
 #include "llvm-c/Types.h"
 
-#ifdef __cplusplus
-extern "C" {
-#endif
+LLVM_C_EXTERN_C_BEGIN
 
 /**
  * @defgroup LLVMCInitialization Initialization Routines
  * @ingroup LLVMC
  *
  * This module contains routines used to initialize the LLVM system.
  *
  * @{

 void LLVMInitializeIPA(LLVMPassRegistryRef R);
 void LLVMInitializeCodeGen(LLVMPassRegistryRef R);
 void LLVMInitializeTarget(LLVMPassRegistryRef R);
 
 /**
  * @}
  */
 
-#ifdef __cplusplus
-}
-#endif
+LLVM_C_EXTERN_C_END
 
 #endif

llvm/include/llvm-c/LinkTimeOptimizer.h

 // library. This is intended to be used by linkers which are C-only in
 // their implementation for performing LTO.
 //
 //===----------------------------------------------------------------------===//
 
 #ifndef LLVM_C_LINKTIMEOPTIMIZER_H
 #define LLVM_C_LINKTIMEOPTIMIZER_H
 
-#ifdef __cplusplus
-extern "C" {
-#endif
+#include "llvm-c/ExternC.h"
+
+LLVM_C_EXTERN_C_BEGIN
 
 /**
  * @defgroup LLVMCLinkTimeOptimizer Link Time Optimization
  * @ingroup LLVMC
  *
  * @{
  */
 
extern llvm_lto_status_t llvm_read_object_file
     (llvm_lto_t lto, const char* input_filename);
   extern llvm_lto_status_t llvm_optimize_modules
     (llvm_lto_t lto, const char* output_filename);
 
 /**
  * @}
  */
 
-#ifdef __cplusplus
-}
-#endif
+  LLVM_C_EXTERN_C_END
 
 #endif

llvm/include/llvm-c/Linker.h

 /*===-- llvm-c/Linker.h - Module Linker C Interface -------------*- C++ -*-===*\
 |*                                                                            *|
 |* Part of the LLVM Project, under the Apache License v2.0 with LLVM          *|
 |* Exceptions.                                                                *|
 |* See https://llvm.org/LICENSE.txt for license information.                  *|
 |* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception                    *|
 |*                                                                            *|
 |*===----------------------------------------------------------------------===*|
 |*                                                                            *|
 |* This file defines the C interface to the module/file/archive linker.       *|
 |*                                                                            *|
 \*===----------------------------------------------------------------------===*/
 
 #ifndef LLVM_C_LINKER_H
 #define LLVM_C_LINKER_H
 
+#include "llvm-c/ExternC.h"
 #include "llvm-c/Types.h"
 
-#ifdef __cplusplus
-extern "C" {
-#endif
+LLVM_C_EXTERN_C_BEGIN
 
 /* This enum is provided for backwards-compatibility only. It has no effect. */
 typedef enum {
   LLVMLinkerDestroySource = 0, /* This is the default behavior. */
   LLVMLinkerPreserveSource_Removed = 1 /* This option has been deprecated and
                                           should not be used. */
 } LLVMLinkerMode;
 
 /* Links the source module into the destination module. The source module is
  * destroyed.
  * The return value is true if an error occurred, false otherwise.
  * Use the diagnostic handler to get any diagnostic message.
 */
 LLVMBool LLVMLinkModules2(LLVMModuleRef Dest, LLVMModuleRef Src);
 
-#ifdef __cplusplus
-}
-#endif
+LLVM_C_EXTERN_C_END
 
 #endif

llvm/include/llvm-c/Object.h

 /* with C++ due to name mangling. So in addition to C, this interface enables */
 /* tools written in such languages.                                           */
 /*                                                                            */
 /*===----------------------------------------------------------------------===*/
 
 #ifndef LLVM_C_OBJECT_H
 #define LLVM_C_OBJECT_H
 
+#include "llvm-c/ExternC.h"
 #include "llvm-c/Types.h"
 #include "llvm/Config/llvm-config.h"
 
-#ifdef __cplusplus
-extern "C" {
-#endif
+LLVM_C_EXTERN_C_BEGIN
 
 /**
  * @defgroup LLVMCObject Object file reading and writing
  * @ingroup LLVMC
  *
  * @{
  */
 

 
 /** Deprecated: Use LLVMObjectFileIsSymbolIteratorAtEnd instead. */
 LLVMBool LLVMIsSymbolIteratorAtEnd(LLVMObjectFileRef ObjectFile,
                                    LLVMSymbolIteratorRef SI);
 /**
  * @}
  */
 
-#ifdef __cplusplus
-}
-#endif /* defined(__cplusplus) */
+LLVM_C_EXTERN_C_END
 
 #endif

llvm/include/llvm-c/OrcBindings.h

 |*       changed without warning.                                             *|
 |*                                                                            *|
 \*===----------------------------------------------------------------------===*/
 
 #ifndef LLVM_C_ORCBINDINGS_H
 #define LLVM_C_ORCBINDINGS_H
 
 #include "llvm-c/Error.h"
+#include "llvm-c/ExternC.h"
 #include "llvm-c/Object.h"
 #include "llvm-c/TargetMachine.h"
 
-#ifdef __cplusplus
-extern "C" {
-#endif
+LLVM_C_EXTERN_C_BEGIN
 
 typedef struct LLVMOrcOpaqueJITStack *LLVMOrcJITStackRef;
 typedef uint64_t LLVMOrcModuleHandle;
 typedef uint64_t LLVMOrcTargetAddress;
 typedef uint64_t (*LLVMOrcSymbolResolverFn)(const char *Name, void *LookupCtx);
 typedef uint64_t (*LLVMOrcLazyCompileCallbackFn)(LLVMOrcJITStackRef JITStack,
                                                  void *CallbackCtx);
 

 
 /**
  * Unegister a JIT Event Listener.
  *
  * A NULL listener is ignored.
  */
 void LLVMOrcUnregisterJITEventListener(LLVMOrcJITStackRef JITStack, LLVMJITEventListenerRef L);
 
-#ifdef __cplusplus
-}
-#endif /* extern "C" */
+LLVM_C_EXTERN_C_END
 
 #endif /* LLVM_C_ORCBINDINGS_H */

llvm/include/llvm-c/Remarks.h

 |* This header provides a public interface to a remark diagnostics library.   *|
 |* LLVM provides an implementation of this interface.                         *|
 |*                                                                            *|
 \*===----------------------------------------------------------------------===*/
 
 #ifndef LLVM_C_REMARKS_H
 #define LLVM_C_REMARKS_H
 
+#include "llvm-c/ExternC.h"
 #include "llvm-c/Types.h"
 #ifdef __cplusplus
 #include <cstddef>
-extern "C" {
 #else
 #include <stddef.h>
 #endif /* !defined(__cplusplus) */
 
+LLVM_C_EXTERN_C_BEGIN
+
 /**
  * @defgroup LLVMCREMARKS Remarks
  * @ingroup LLVMC
  *
  * @{
  */
 
 // 0 -> 1: Bitstream remarks support.

  * \since REMARKS_API_VERSION=0
  */
 extern uint32_t LLVMRemarkVersion(void);
 
 /**
  * @} // endgoup LLVMCREMARKS
  */
 
-#ifdef __cplusplus
-}
-#endif /* !defined(__cplusplus) */
+LLVM_C_EXTERN_C_END
 
 #endif /* LLVM_C_REMARKS_H */

llvm/include/llvm-c/Support.h

 |* This file defines the C interface to the LLVM support library.             *|
 |*                                                                            *|
 \*===----------------------------------------------------------------------===*/
 
 #ifndef LLVM_C_SUPPORT_H
 #define LLVM_C_SUPPORT_H
 
 #include "llvm-c/DataTypes.h"
+#include "llvm-c/ExternC.h"
 #include "llvm-c/Types.h"
 
-#ifdef __cplusplus
-extern "C" {
-#endif
+LLVM_C_EXTERN_C_BEGIN
 
 /**
  * This function permanently loads the dynamic library at the given path.
  * It is safe to call this function multiple times for the same library.
  *
  * @see sys::DynamicLibrary::LoadLibraryPermanently()
   */
 LLVMBool LLVMLoadLibraryPermanently(const char* Filename);

  * This functions permanently adds the symbol \p symbolName with the
  * value \p symbolValue.  These symbols are searched before any
  * libraries.
  *
  * @see sys::DynamicLibrary::AddSymbol()
  */
 void LLVMAddSymbol(const char *symbolName, void *symbolValue);
 
-#ifdef __cplusplus
-}
-#endif
+LLVM_C_EXTERN_C_END
 
 #endif

llvm/include/llvm-c/Target.h

 /* with C++ due to name mangling. So in addition to C, this interface enables */
 /* tools written in such languages.                                           */
 /*                                                                            */
 /*===----------------------------------------------------------------------===*/
 
 #ifndef LLVM_C_TARGET_H
 #define LLVM_C_TARGET_H
 
+#include "llvm-c/ExternC.h"
 #include "llvm-c/Types.h"
 #include "llvm/Config/llvm-config.h"
 
-#ifdef __cplusplus
-extern "C" {
-#endif
+LLVM_C_EXTERN_C_BEGIN
 
 /**
  * @defgroup LLVMCTarget Target information
  * @ingroup LLVMC
  *
  * @{
  */
 
/** Computes the byte offset of the indexed struct element for a target.
     See the method llvm::StructLayout::getElementContainingOffset. */
 unsigned long long LLVMOffsetOfElement(LLVMTargetDataRef TD,
                                        LLVMTypeRef StructTy, unsigned Element);
 
 /**
  * @}
  */
 
-#ifdef __cplusplus
-}
-#endif /* defined(__cplusplus) */
+LLVM_C_EXTERN_C_END
 
 #endif

llvm/include/llvm-c/TargetMachine.h

 |* with C++ due to name mangling. So in addition to C, this interface enables *|
 |* tools written in such languages.                                           *|
 |*                                                                            *|
 \*===----------------------------------------------------------------------===*/
 
 #ifndef LLVM_C_TARGETMACHINE_H
 #define LLVM_C_TARGETMACHINE_H
 
+#include "llvm-c/ExternC.h"
 #include "llvm-c/Target.h"
 #include "llvm-c/Types.h"
 
-#ifdef __cplusplus
-extern "C" {
-#endif
+LLVM_C_EXTERN_C_BEGIN
+
 typedef struct LLVMOpaqueTargetMachine *LLVMTargetMachineRef;
 typedef struct LLVMTarget *LLVMTargetRef;
 
 typedef enum {
     LLVMCodeGenLevelNone,
     LLVMCodeGenLevelLess,
     LLVMCodeGenLevelDefault,
     LLVMCodeGenLevelAggressive

 
 /** Get the host CPU's features as a string. The result needs to be disposed
   with LLVMDisposeMessage. */
 char* LLVMGetHostCPUFeatures(void);
 
 /** Adds the target-specific analysis passes to the pass manager. */
 void LLVMAddAnalysisPasses(LLVMTargetMachineRef T, LLVMPassManagerRef PM);
 
-#ifdef __cplusplus
-}
-#endif
+LLVM_C_EXTERN_C_END
 
 #endif

llvm/include/llvm-c/Transforms/AggressiveInstCombine.h

 |* This header declares the C interface to libLLVMAggressiveInstCombine.a,    *|
 |* which combines instructions to form fewer, simple IR instructions.         *|
 |*                                                                            *|
 \*===----------------------------------------------------------------------===*/
 
 #ifndef LLVM_C_TRANSFORMS_AGGRESSIVEINSTCOMBINE_H
 #define LLVM_C_TRANSFORMS_AGGRESSIVEINSTCOMBINE_H
 
+#include "llvm-c/ExternC.h"
 #include "llvm-c/Types.h"
 
-#ifdef __cplusplus
-extern "C" {
-#endif
+LLVM_C_EXTERN_C_BEGIN
 
 /**
  * @defgroup LLVMCTransformsAggressiveInstCombine Aggressive Instruction Combining transformations
  * @ingroup LLVMCTransforms
  *
  * @{
  */
 
 /** See llvm::createAggressiveInstCombinerPass function. */
 void LLVMAddAggressiveInstCombinerPass(LLVMPassManagerRef PM);
 
 /**
  * @}
  */
 
-#ifdef __cplusplus
-}
-#endif /* defined(__cplusplus) */
+LLVM_C_EXTERN_C_END
 
 #endif
 

llvm/include/llvm-c/Transforms/Coroutines.h

 |* with C++ due to name mangling. So in addition to C, this interface enables *|
 |* tools written in such languages.                                           *|
 |*                                                                            *|
 \*===----------------------------------------------------------------------===*/
 
 #ifndef LLVM_C_TRANSFORMS_COROUTINES_H
 #define LLVM_C_TRANSFORMS_COROUTINES_H
 
+#include "llvm-c/ExternC.h"
 #include "llvm-c/Types.h"
 
-#ifdef __cplusplus
-extern "C" {
-#endif
+LLVM_C_EXTERN_C_BEGIN
 
 /**
  * @defgroup LLVMCTransformsCoroutines Coroutine transformations
  * @ingroup LLVMCTransforms
  *
  * @{
  */
 
 /** See llvm::createCoroEarlyPass function. */
 void LLVMAddCoroEarlyPass(LLVMPassManagerRef PM);
 
 /** See llvm::createCoroSplitPass function. */
 void LLVMAddCoroSplitPass(LLVMPassManagerRef PM);
 
 /** See llvm::createCoroElidePass function. */
 void LLVMAddCoroElidePass(LLVMPassManagerRef PM);
 
 /** See llvm::createCoroCleanupPass function. */
 void LLVMAddCoroCleanupPass(LLVMPassManagerRef PM);
 
 /**
  * @}
  */
 
-#ifdef __cplusplus
-}
-#endif /* defined(__cplusplus) */
+LLVM_C_EXTERN_C_END
 
 #endif

llvm/include/llvm-c/Transforms/IPO.h

 |* This header declares the C interface to libLLVMIPO.a, which implements     *|
 |* various interprocedural transformations of the LLVM IR.                    *|
 |*                                                                            *|
 \*===----------------------------------------------------------------------===*/
 
 #ifndef LLVM_C_TRANSFORMS_IPO_H
 #define LLVM_C_TRANSFORMS_IPO_H
 
+#include "llvm-c/ExternC.h"
 #include "llvm-c/Types.h"
 
-#ifdef __cplusplus
-extern "C" {
-#endif
+LLVM_C_EXTERN_C_BEGIN
 
 /**
  * @defgroup LLVMCTransformsIPO Interprocedural transformations
  * @ingroup LLVMCTransforms
  *
  * @{
  */
 

 
 /** See llvm::createStripSymbolsPass function. */
 void LLVMAddStripSymbolsPass(LLVMPassManagerRef PM);
 
 /**
  * @}
  */
 
-#ifdef __cplusplus
-}
-#endif /* defined(__cplusplus) */
+LLVM_C_EXTERN_C_END
 
 #endif

llvm/include/llvm-c/Transforms/InstCombine.h

 |* This header declares the C interface to libLLVMInstCombine.a, which        *|
 |* combines instructions to form fewer, simple IR instructions.               *|
 |*                                                                            *|
 \*===----------------------------------------------------------------------===*/
 
 #ifndef LLVM_C_TRANSFORMS_INSTCOMBINE_H
 #define LLVM_C_TRANSFORMS_INSTCOMBINE_H
 
+#include "llvm-c/ExternC.h"
 #include "llvm-c/Types.h"
 
-#ifdef __cplusplus
-extern "C" {
-#endif
+LLVM_C_EXTERN_C_BEGIN
 
 /**
  * @defgroup LLVMCTransformsInstCombine Instruction Combining transformations
  * @ingroup LLVMCTransforms
  *
  * @{
  */
 
 /** See llvm::createInstructionCombiningPass function. */
 void LLVMAddInstructionCombiningPass(LLVMPassManagerRef PM);
 
 /**
  * @}
  */
 
-#ifdef __cplusplus
-}
-#endif /* defined(__cplusplus) */
+LLVM_C_EXTERN_C_END
 
 #endif
 

llvm/include/llvm-c/Transforms/PassManagerBuilder.h

 /*===-- llvm-c/Transform/PassManagerBuilder.h - PMB C Interface ---*- C -*-===*\
 |*                                                                            *|
 |* Part of the LLVM Project, under the Apache License v2.0 with LLVM          *|
 |* Exceptions.                                                                *|
 |* See https://llvm.org/LICENSE.txt for license information.                  *|
 |* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception                    *|
 |*                                                                            *|
 |*===----------------------------------------------------------------------===*|
 |*                                                                            *|
 |* This header declares the C interface to the PassManagerBuilder class.      *|
 |*                                                                            *|
 \*===----------------------------------------------------------------------===*/
 
 #ifndef LLVM_C_TRANSFORMS_PASSMANAGERBUILDER_H
 #define LLVM_C_TRANSFORMS_PASSMANAGERBUILDER_H
 
+#include "llvm-c/ExternC.h"
 #include "llvm-c/Types.h"
 
 typedef struct LLVMOpaquePassManagerBuilder *LLVMPassManagerBuilderRef;
 
-#ifdef __cplusplus
-extern "C" {
-#endif
+LLVM_C_EXTERN_C_BEGIN
 
 /**
  * @defgroup LLVMCTransformsPassManagerBuilder Pass manager builder
  * @ingroup LLVMCTransforms
  *
  * @{
  */
 
void LLVMPassManagerBuilderPopulateLTOPassManager(LLVMPassManagerBuilderRef PMB,
                                                   LLVMPassManagerRef PM,
                                                   LLVMBool Internalize,
                                                   LLVMBool RunInliner);
 
 /**
  * @}
  */
 
-#ifdef __cplusplus
-}
-#endif
+LLVM_C_EXTERN_C_END
 
 #endif

llvm/include/llvm-c/Transforms/Scalar.h

 |* with C++ due to name mangling. So in addition to C, this interface enables *|
 |* tools written in such languages.                                           *|
 |*                                                                            *|
 \*===----------------------------------------------------------------------===*/
 
 #ifndef LLVM_C_TRANSFORMS_SCALAR_H
 #define LLVM_C_TRANSFORMS_SCALAR_H
 
+#include "llvm-c/ExternC.h"
 #include "llvm-c/Types.h"
 
-#ifdef __cplusplus
-extern "C" {
-#endif
+LLVM_C_EXTERN_C_BEGIN
 
 /**
  * @defgroup LLVMCTransformsScalar Scalar transformations
  * @ingroup LLVMCTransforms
  *
  * @{
  */
 

 
 /** See llvm::createUnifyFunctionExitNodesPass function */
 void LLVMAddUnifyFunctionExitNodesPass(LLVMPassManagerRef PM);
 
 /**
  * @}
  */
 
-#ifdef __cplusplus
-}
-#endif /* defined(__cplusplus) */
+LLVM_C_EXTERN_C_END
 
 #endif

llvm/include/llvm-c/Transforms/Utils.h

 |* with C++ due to name mangling. So in addition to C, this interface enables *|
 |* tools written in such languages.                                           *|
 |*                                                                            *|
 \*===----------------------------------------------------------------------===*/
 
 #ifndef LLVM_C_TRANSFORMS_UTILS_H
 #define LLVM_C_TRANSFORMS_UTILS_H
 
+#include "llvm-c/ExternC.h"
 #include "llvm-c/Types.h"
 
-#ifdef __cplusplus
-extern "C" {
-#endif
+LLVM_C_EXTERN_C_BEGIN
 
 /**
  * @defgroup LLVMCTransformsUtils Transformation Utilities
  * @ingroup LLVMCTransforms
  *
  * @{
  */
 
 /** See llvm::createLowerSwitchPass function. */
 void LLVMAddLowerSwitchPass(LLVMPassManagerRef PM);
 
 /** See llvm::createPromoteMemoryToRegisterPass function. */
 void LLVMAddPromoteMemoryToRegisterPass(LLVMPassManagerRef PM);
 
 /** See llvm::createAddDiscriminatorsPass function. */
 void LLVMAddAddDiscriminatorsPass(LLVMPassManagerRef PM);
 
 /**
  * @}
  */
 
-#ifdef __cplusplus
-}
-#endif /* defined(__cplusplus) */
+LLVM_C_EXTERN_C_END
 
 #endif
 

llvm/include/llvm-c/Transforms/Vectorize.h

 |* with C++ due to name mangling. So in addition to C, this interface enables *|
 |* tools written in such languages.                                           *|
 |*                                                                            *|
 \*===----------------------------------------------------------------------===*/
 
 #ifndef LLVM_C_TRANSFORMS_VECTORIZE_H
 #define LLVM_C_TRANSFORMS_VECTORIZE_H
 
+#include "llvm-c/ExternC.h"
 #include "llvm-c/Types.h"
 
-#ifdef __cplusplus
-extern "C" {
-#endif
+LLVM_C_EXTERN_C_BEGIN
 
 /**
  * @defgroup LLVMCTransformsVectorize Vectorization transformations
  * @ingroup LLVMCTransforms
  *
  * @{
  */
 
 /** See llvm::createLoopVectorizePass function. */
 void LLVMAddLoopVectorizePass(LLVMPassManagerRef PM);
 
 /** See llvm::createSLPVectorizerPass function. */
 void LLVMAddSLPVectorizePass(LLVMPassManagerRef PM);
 
 /**
  * @}
  */
 
-#ifdef __cplusplus
-}
-#endif /* defined(__cplusplus) */
+LLVM_C_EXTERN_C_END
 
 #endif

llvm/include/llvm-c/Types.h

 |* This file defines types used by the C interface to LLVM.                   *|
 |*                                                                            *|
 \*===----------------------------------------------------------------------===*/
 
 #ifndef LLVM_C_TYPES_H
 #define LLVM_C_TYPES_H
 
 #include "llvm-c/DataTypes.h"
+#include "llvm-c/ExternC.h"
 
-#ifdef __cplusplus
-extern "C" {
-#endif
+LLVM_C_EXTERN_C_BEGIN
 
 /**
  * @defgroup LLVMCSupportTypes Types and Enumerations
  *
  * @{
  */
 
 typedef int LLVMBool;

  * @see llvm::object::Binary
  */
 typedef struct LLVMOpaqueBinary *LLVMBinaryRef;
 
 /**
  * @}
  */
 
-#ifdef __cplusplus
-}
-#endif
+LLVM_C_EXTERN_C_END
 
 #endif

llvm/include/llvm-c/lto.h

 |* library.  LLVM provides an implementation of this interface for use with   *|
 |* llvm bitcode files.                                                        *|
 |*                                                                            *|
 \*===----------------------------------------------------------------------===*/
 
 #ifndef LLVM_C_LTO_H
 #define LLVM_C_LTO_H
 
+#include "llvm-c/ExternC.h"
+
 #ifdef __cplusplus
 #include <cstddef>
 #else
 #include <stddef.h>
 #endif
 #include <sys/types.h>
 
 #ifndef __cplusplus

 typedef struct LLVMOpaqueLTOModule *lto_module_t;
 
 /** opaque reference to a code generator */
 typedef struct LLVMOpaqueLTOCodeGenerator *lto_code_gen_t;
 
 /** opaque reference to a thin code generator */
 typedef struct LLVMOpaqueThinLTOCodeGenerator *thinlto_code_gen_t;
 
-#ifdef __cplusplus
-extern "C" {
-#endif
+LLVM_C_EXTERN_C_BEGIN
 
 /**
  * Returns a printable string.
  *
  * \since prior to LTO_API_VERSION=3
  */
 extern const char*
 lto_get_version(void);

  */
 extern void thinlto_codegen_set_cache_size_files(thinlto_code_gen_t cg,
                                                  unsigned max_size_files);
 
 /**
  * @} // endgroup LLVMCTLTO_CACHING
  */
 
-#ifdef __cplusplus
-}
-#endif
+LLVM_C_EXTERN_C_END
 
 #endif /* LLVM_C_LTO_H */