Hi danalbert, rengolin, jroelofs,
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.
http://reviews.llvm.org/D7099
Files:
CMakeLists.txt
cmake/config-ix.cmake
Index: CMakeLists.txt
===================================================================
--- CMakeLists.txt
+++ CMakeLists.txt
@@ -164,6 +164,7 @@
endif()
endmacro()
+set(LIBCXXABI_C_FLAGS "")
set(LIBCXXABI_CXX_FLAGS "")
set(LIBCXXABI_COMPILE_FLAGS "")
set(LIBCXXABI_LINK_FLAGS "")
@@ -216,6 +217,8 @@
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 @@
"--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} ${LIBCXXABI_C_FLAGS}")
#===============================================================================
# Setup Source Code
Index: cmake/config-ix.cmake
===================================================================
--- cmake/config-ix.cmake
+++ cmake/config-ix.cmake
@@ -4,6 +4,7 @@
# Check compiler flags
check_cxx_compiler_flag(-fPIC LIBCXXABI_HAS_FPIC_FLAG)
check_cxx_compiler_flag(-fstrict-aliasing
LIBCXXABI_HAS_FSTRICT_ALIASING_FLAG)
+check_cxx_compiler_flag(-funwind-tables LIBCXXABI_HAS_FUNWIND_TABLES)
check_cxx_compiler_flag(-nodefaultlibs LIBCXXABI_HAS_NODEFAULTLIBS_FLAG)
check_cxx_compiler_flag(-nostdinc++ LIBCXXABI_HAS_NOSTDINCXX_FLAG)
check_cxx_compiler_flag(-Wall LIBCXXABI_HAS_WALL_FLAG)
EMAIL PREFERENCES
http://reviews.llvm.org/settings/panel/emailpreferences/
Index: CMakeLists.txt
===================================================================
--- CMakeLists.txt
+++ CMakeLists.txt
@@ -164,6 +164,7 @@
endif()
endmacro()
+set(LIBCXXABI_C_FLAGS "")
set(LIBCXXABI_CXX_FLAGS "")
set(LIBCXXABI_COMPILE_FLAGS "")
set(LIBCXXABI_LINK_FLAGS "")
@@ -216,6 +217,8 @@
append_if(LIBCXXABI_CXX_FLAGS LIBCXXABI_HAS_FSTRICT_ALIASING_FLAG -fstrict-aliasing)
append_if(LIBCXXABI_CXX_FLAGS LIBCXXABI_HAS_EHSC_FLAG -EHsc)
+append_if(LIBCXXABI_C_FLAGS LIBCXXABI_HAS_FUNWIND_TABLES -funwind-tables)
+
# Assert
string(TOUPPER "${CMAKE_BUILD_TYPE}" uppercase_CMAKE_BUILD_TYPE)
if (LIBCXXABI_ENABLE_ASSERTIONS)
@@ -260,6 +263,7 @@
"--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
Index: cmake/config-ix.cmake
===================================================================
--- cmake/config-ix.cmake
+++ cmake/config-ix.cmake
@@ -4,6 +4,7 @@
# Check compiler flags
check_cxx_compiler_flag(-fPIC LIBCXXABI_HAS_FPIC_FLAG)
check_cxx_compiler_flag(-fstrict-aliasing LIBCXXABI_HAS_FSTRICT_ALIASING_FLAG)
+check_cxx_compiler_flag(-funwind-tables LIBCXXABI_HAS_FUNWIND_TABLES)
check_cxx_compiler_flag(-nodefaultlibs LIBCXXABI_HAS_NODEFAULTLIBS_FLAG)
check_cxx_compiler_flag(-nostdinc++ LIBCXXABI_HAS_NOSTDINCXX_FLAG)
check_cxx_compiler_flag(-Wall LIBCXXABI_HAS_WALL_FLAG)
_______________________________________________
cfe-commits mailing list
[email protected]
http://lists.cs.uiuc.edu/mailman/listinfo/cfe-commits
