[cmake] Move check for libproc to config-ix.cmake

[ahoppen]

Summary

As suggested by Nico in https://reviews.llvm.org/D96049, move check for libproc from CMakeLists to config-ix.cmake

[thakis]

Thanks!

llvm/cmake/config-ix.cmake

357

Is this needed? Seems to work fine without it on macOS at least.

[teemperor]

llvm/cmake/config-ix.cmake

357

Works without for me on macOS and Arch Linux, so I'm going to merge this for Alex without this change.

[ahoppen]

llvm/cmake/config-ix.cmake

357

Thanks!

llvm/CMakeLists.txt

if (LLVM_BUILD_STATIC)
   foreach (shared_lib_suffix ${CMAKE_SHARED_LIBRARY_SUFFIX} ${CMAKE_IMPORT_LIBRARY_SUFFIX})
     list(FIND CMAKE_FIND_LIBRARY_SUFFIXES ${shared_lib_suffix} shared_lib_suffix_idx)
     if(NOT ${shared_lib_suffix_idx} EQUAL -1)
       list(REMOVE_AT CMAKE_FIND_LIBRARY_SUFFIXES ${shared_lib_suffix_idx})
     endif()
   endforeach()
 endif()
 
-include(CheckSymbolExists)
-check_symbol_exists(proc_pid_rusage "libproc.h" HAVE_PROC_PID_RUSAGE)
-if(HAVE_PROC_PID_RUSAGE)
-  list(APPEND CMAKE_REQUIRED_LIBRARIES proc)
-endif()
-
 # Use libtool instead of ar if you are both on an Apple host, and targeting Apple.
 if(CMAKE_HOST_APPLE AND APPLE)
   include(UseLibtool)
 endif()
 
 # Override the default target with an environment variable named by LLVM_TARGET_TRIPLE_ENV.
 set(LLVM_TARGET_TRIPLE_ENV CACHE STRING "The name of environment variable to override default target. Disabled by blank.")
 mark_as_advanced(LLVM_TARGET_TRIPLE_ENV)

llvm/cmake/config-ix.cmake

if( LLVM_ENABLE_FFI )
   list(REMOVE_ITEM CMAKE_REQUIRED_INCLUDES ${FFI_INCLUDE_PATH})
   list(REMOVE_ITEM CMAKE_REQUIRED_LIBRARIES ${FFI_LIBRARY_PATH})
 else()
   unset(HAVE_FFI_FFI_H CACHE)
   unset(HAVE_FFI_H CACHE)
   unset(HAVE_FFI_CALL CACHE)
 endif( LLVM_ENABLE_FFI )
 
+check_symbol_exists(proc_pid_rusage "libproc.h" HAVE_PROC_PID_RUSAGE)
+
 # Whether we can use std::is_trivially_copyable to verify llvm::is_trivially_copyable.
 CHECK_CXX_SOURCE_COMPILES("
 #include <type_traits>
 struct T { int val; };
 static_assert(std::is_trivially_copyable<T>::value, \"ok\");
 int main() { return 0;}
 " HAVE_STD_IS_TRIVIALLY_COPYABLE)