[CMake] Fix PR14200, llvm-config output misses -fno-rtti

This change adds RTTI and Exception flags to llvm-config's cxxflags. This solution is a minimal patch to solve the issue, and is recommended for the 3.7 release branch. Tom Stellard's outstanding work is the longer term solution.

Patch By: David Wiberg

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@245064 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/tools/llvm-config/CMakeLists.txt b/tools/llvm-config/CMakeLists.txt
index d2ef45a168159088dff23f9b80a8f4f108a80c72..edbd8c950d7bb46e774cc704378400973380db52 100644 (file)
--- a/tools/llvm-config/CMakeLists.txt
+++ b/tools/llvm-config/CMakeLists.txt
@@ -3,6 +3,11 @@ set(LLVM_LINK_COMPONENTS support)
 set(BUILDVARIABLES_SRCPATH ${CMAKE_CURRENT_SOURCE_DIR}/BuildVariables.inc.in)
 set(BUILDVARIABLES_OBJPATH ${CMAKE_CURRENT_BINARY_DIR}/BuildVariables.inc)
 
+# Add the llvm-config tool.
+add_llvm_tool(llvm-config
+  llvm-config.cpp
+  )
+
 # Compute the substitution values for various items.
 get_property(LLVM_SYSTEM_LIBS_LIST TARGET LLVMSupport PROPERTY LLVM_SYSTEM_LIBS)
 foreach(l ${LLVM_SYSTEM_LIBS_LIST})
@@ -10,12 +15,15 @@ foreach(l ${LLVM_SYSTEM_LIBS_LIST})
 endforeach()
 string(REPLACE ";" " " SYSTEM_LIBS "${SYSTEM_LIBS}")
 
+# Fetch target specific compile options, e.g. RTTI option
+get_property(COMPILE_FLAGS TARGET llvm-config PROPERTY COMPILE_FLAGS)
+
 # Use configure_file to create BuildVariables.inc.
 set(LLVM_SRC_ROOT ${LLVM_MAIN_SRC_DIR})
 set(LLVM_OBJ_ROOT ${LLVM_BINARY_DIR})
 set(LLVM_CPPFLAGS "${CMAKE_CPP_FLAGS} ${CMAKE_CPP_FLAGS_${uppercase_CMAKE_BUILD_TYPE}} ${LLVM_DEFINITIONS}")
 set(LLVM_CFLAGS "${CMAKE_C_FLAGS} ${CMAKE_C_FLAGS_${uppercase_CMAKE_BUILD_TYPE}} ${LLVM_DEFINITIONS}")
-set(LLVM_CXXFLAGS "${CMAKE_CXX_FLAGS} ${CMAKE_CXX_FLAGS_${uppercase_CMAKE_BUILD_TYPE}} ${LLVM_DEFINITIONS}")
+set(LLVM_CXXFLAGS "${CMAKE_CXX_FLAGS} ${CMAKE_CXX_FLAGS_${uppercase_CMAKE_BUILD_TYPE}} ${COMPILE_FLAGS} ${LLVM_DEFINITIONS}")
 # Use the C++ link flags, since they should be a superset of C link flags.
 set(LLVM_LDFLAGS "${CMAKE_CXX_LINK_FLAGS}")
 set(LLVM_BUILDMODE ${CMAKE_BUILD_TYPE})
@@ -26,11 +34,6 @@ configure_file(${BUILDVARIABLES_SRCPATH} ${BUILDVARIABLES_OBJPATH} @ONLY)
 # Set build-time environment(s).
 add_definitions(-DCMAKE_CFG_INTDIR="${CMAKE_CFG_INTDIR}")
 
-# Add the llvm-config tool.
-add_llvm_tool(llvm-config
-  llvm-config.cpp
-  )
-
 # Add the dependency on the generation step.
 add_file_dependencies(${CMAKE_CURRENT_SOURCE_DIR}/llvm-config.cpp ${BUILDVARIABLES_OBJPATH})