[PATCH] D13131: Allow the builting of the builtins library with a forced compiler.

[Vasileios Kalintiris via llvm-commits]

vkalintiris created this revision.
vkalintiris added a reviewer: samsonov.
vkalintiris added a subscriber: llvm-commits.
Herald added subscribers: srhines, danalbert, tberghammer.

When we are trying to create a new LLVM-based toolchain, without using a GCC
toolchain, we don't have a fully-working compiler in the beginning. So, we have
to force the usage of the C compiler and assume that the CMAKE invocation
includes the correct C flags in order to build compiler-rt.

http://reviews.llvm.org/D13131

Files:
  cmake/config-ix.cmake

Index: cmake/config-ix.cmake
===================================================================
--- cmake/config-ix.cmake
+++ cmake/config-ix.cmake
@@ -168,7 +168,12 @@
 endif()
 
 # Generate the COMPILER_RT_SUPPORTED_ARCH list.
-if(ANDROID)
+if(NOT COMPILER_RT_BUILD_SANITIZERS AND CMAKE_C_COMPILER_FORCED)
+  # If the compiler has been forced and we build only the builtins library
+  # assume that the arch is supported.
+  set(CAN_TARGET_${COMPILER_RT_DEFAULT_TARGET_ARCH} 1)
+  list(APPEND COMPILER_RT_SUPPORTED_ARCH ${COMPILER_RT_DEFAULT_TARGET_ARCH})
+elseif(ANDROID)
   # Examine compiler output to determine target architecture.
   detect_target_arch()
   set(COMPILER_RT_OS_SUFFIX "-android")


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