[libunwind] r329340 - [cmake] Remove duplicate command line options from build

[Aaron Smith via cfe-commits]

Author: asmith
Date: Thu Apr  5 13:27:50 2018
New Revision: 329340

URL: http://llvm.org/viewvc/llvm-project?rev=329340&view=rev
Log:
[cmake] Remove duplicate command line options from build

CMAKE_CXX_FLAGS and CMAKE_C_FLAGS are added twice to the command line.
This causes the command line options to be doubled which works until
it doesn't as not all options can be specified twice. 

For example,

clang-cl foo.c /GS- /GS- -mllvm -small-loop-cost=1 -mllvm -small-loop-cost=1
clang (LLVM option parsing): for the -small-loop-cost option: may only occur zero or one times!


Modified:
    libunwind/trunk/src/CMakeLists.txt

Modified: libunwind/trunk/src/CMakeLists.txt
URL: http://llvm.org/viewvc/llvm-project/libunwind/trunk/src/CMakeLists.txt?rev=329340&r1=329339&r2=329340&view=diff
==============================================================================
--- libunwind/trunk/src/CMakeLists.txt (original)
+++ libunwind/trunk/src/CMakeLists.txt Thu Apr  5 13:27:50 2018
@@ -91,9 +91,9 @@ string(REPLACE ";" " " LIBUNWIND_C_FLAGS
 string(REPLACE ";" " " LIBUNWIND_LINK_FLAGS "${LIBUNWIND_LINK_FLAGS}")
 
 set_property(SOURCE ${LIBUNWIND_CXX_SOURCES}
-             APPEND_STRING PROPERTY COMPILE_FLAGS " ${CMAKE_CXX_FLAGS} ${LIBUNWIND_CXX_FLAGS}")
+             APPEND_STRING PROPERTY COMPILE_FLAGS " ${LIBUNWIND_CXX_FLAGS}")
 set_property(SOURCE ${LIBUNWIND_C_SOURCES}
-             APPEND_STRING PROPERTY COMPILE_FLAGS " ${CMAKE_C_FLAGS} ${LIBUNWIND_C_FLAGS}")
+             APPEND_STRING PROPERTY COMPILE_FLAGS " ${LIBUNWIND_C_FLAGS}")
 
 # Add a object library that contains the compiled source files.
 add_library(unwind_objects OBJECT ${LIBUNWIND_SOURCES} ${LIBUNWIND_HEADERS})