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Add -funwind-tables to CMAKE_C_FLAGS.

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Without -funwind-tables, the compiler won't generate the unwinding
table for these C functions.  However, the functions in libunwind,
such as `_Unwind_Backtrace()`, WILL unwind stack to get the backtrace.

llvm-svn: 226823
This commit is contained in:
Logan Chien 2015-01-22 13:39:08 +00:00
parent 6b2c971524
commit dbcd7a35f8
2 changed files with 6 additions and 0 deletions
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4
libcxxabi/CMakeLists.txt
View File

@ -164,6 +164,7 @@ macro(append_if list condition var)
endif()
endmacro()
set(LIBCXXABI_C_FLAGS "")
set(LIBCXXABI_CXX_FLAGS "")
set(LIBCXXABI_COMPILE_FLAGS "")
set(LIBCXXABI_LINK_FLAGS "")
@ -216,6 +217,8 @@ endif()
append_if(LIBCXXABI_CXX_FLAGS LIBCXXABI_HAS_FSTRICT_ALIASING_FLAG -fstrict-aliasing)
append_if(LIBCXXABI_CXX_FLAGS LIBCXXABI_HAS_EHSC_FLAG -EHsc)
append_if(LIBCXXABI_C_FLAGS LIBCXXABI_HAS_FUNWIND_TABLES -funwind-tables)
# Assert
string(TOUPPER "${CMAKE_BUILD_TYPE}" uppercase_CMAKE_BUILD_TYPE)
if (LIBCXXABI_ENABLE_ASSERTIONS)
@ -260,6 +263,7 @@ append_if(LIBCXXABI_COMPILE_FLAGS LIBCXXABI_SYSROOT
"--sysroot ${LIBCXXABI_SYSROOT}")
string(REPLACE ";" " " LIBCXXABI_CXX_FLAGS "${LIBCXXABI_CXX_FLAGS}")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${LIBCXXABI_CXX_FLAGS}")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${LIBCXXABI_C_FLAGS}")
#===============================================================================
# Setup Source Code

2
libcxxabi/cmake/config-ix.cmake
View File

@ -1,7 +1,9 @@
include(CheckLibraryExists)
include(CheckCCompilerFlag)
include(CheckCXXCompilerFlag)
# Check compiler flags
check_c_compiler_flag(-funwind-tables LIBCXXABI_HAS_FUNWIND_TABLES)
check_cxx_compiler_flag(-fPIC LIBCXXABI_HAS_FPIC_FLAG)
check_cxx_compiler_flag(-fstrict-aliasing LIBCXXABI_HAS_FSTRICT_ALIASING_FLAG)
check_cxx_compiler_flag(-nodefaultlibs LIBCXXABI_HAS_NODEFAULTLIBS_FLAG)