Make the cfi target available on more platforms.

[pcc]

Summary

On non-Linux targets it just installs the blacklist.

compiler-rt/cmake/config-ix.cmake

 
 if (COMPILER_RT_HAS_SANITIZER_COMMON AND SAFESTACK_SUPPORTED_ARCH AND
     OS_NAME MATCHES "Darwin|Linux|FreeBSD|NetBSD")
   set(COMPILER_RT_HAS_SAFESTACK TRUE)
 else()
   set(COMPILER_RT_HAS_SAFESTACK FALSE)
 endif()
 
-if (COMPILER_RT_HAS_SANITIZER_COMMON AND CFI_SUPPORTED_ARCH AND
-    OS_NAME MATCHES "Linux")
+if (COMPILER_RT_HAS_SANITIZER_COMMON AND CFI_SUPPORTED_ARCH)
   set(COMPILER_RT_HAS_CFI TRUE)
 else()
   set(COMPILER_RT_HAS_CFI FALSE)
 endif()
 
 if (COMPILER_RT_HAS_SANITIZER_COMMON AND ESAN_SUPPORTED_ARCH AND
     OS_NAME MATCHES "Linux")
   set(COMPILER_RT_HAS_ESAN TRUE)

compiler-rt/lib/cfi/CMakeLists.txt

 add_compiler_rt_component(cfi)
 
+if(OS_NAME MATCHES "Linux")
   set(CFI_SOURCES cfi.cc)
 
   include_directories(..)
 
   set(CFI_CFLAGS
     ${SANITIZER_COMMON_CFLAGS}
   )
 
   set(CFI_DIAG_CFLAGS
     -DCFI_ENABLE_DIAG=1
   )
 
   foreach(arch ${CFI_SUPPORTED_ARCH})
     add_compiler_rt_runtime(clang_rt.cfi
       STATIC
       ARCHS ${arch}
       SOURCES ${CFI_SOURCES}
       OBJECT_LIBS RTInterception
                   RTSanitizerCommon
                   RTSanitizerCommonLibc
       CFLAGS ${CFI_CFLAGS}
       PARENT_TARGET cfi)
     add_compiler_rt_runtime(clang_rt.cfi_diag
       STATIC
       ARCHS ${arch}
       SOURCES ${CFI_SOURCES}
       OBJECT_LIBS RTInterception
                   RTSanitizerCommon
                   RTSanitizerCommonLibc
-    RTUbsan
+                  RTUbsan
       CFLAGS ${CFI_CFLAGS} ${CFI_DIAG_CFLAGS}
       PARENT_TARGET cfi)
   endforeach()
+endif()
 
 add_compiler_rt_resource_file(cfi_blacklist cfi_blacklist.txt cfi)