Some flag cleanup for the sanitizer runtimes.
This hoists most of the CFLAGS into a common variable. It also adds
detection for -Wno-c99-extensions and uses it to silence a pile of
warnings.
Finally, it switches to the proper flag -rdynamic.
With this, the cmake build is warning free on my bootstrap Linux build.
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@162809 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/CMakeLists.txt b/CMakeLists.txt
index fc0dd48..088a59a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -74,6 +74,22 @@
set(${out_var} ${archs} PARENT_SCOPE)
endfunction()
+# Provide some common commmandline flags for Sanitizer runtimes.
+set(SANITIZER_COMMON_CFLAGS
+ -fPIC
+ -fno-exceptions
+ -funwind-tables
+ -fvisibility=hidden
+ )
+if(SUPPORTS_NO_VARIADIC_MACROS_FLAG)
+ list(APPEND SANITIZER_COMMON_CFLAGS -Wno-variadic-macros)
+endif()
+check_cxx_compiler_flag(-Wno-c99-extensions
+ SUPPORTS_NO_C99_EXTENSIONS_FLAG)
+if(SUPPORTS_NO_C99_EXTENSIONS_FLAG)
+ list(APPEND SANITIZER_COMMON_CFLAGS -Wno-c99-extensions)
+endif()
+
# Because compiler-rt spends a lot of time setting up custom compile flags,
# define a handy helper function for it. The compile flags setting in CMake
# has serious issues that make its syntax challenging at best.