[libc++abi] Add LIBCXXABI_ENABLE_PIC cmake option
This is on by default, since on many platforms and configurations
libc++abi.a gets statically linked into shared libraries and/or
PIE executables.
This change is a followup to https://reviews.llvm.org/D60005 which
allows us to default to PIC code, but disable this if needed (for
example on WebAssembly where PIC code its currently compatible with
static linking).
Differential Revision: https://reviews.llvm.org/D60049
git-svn-id: https://llvm.org/svn/llvm-project/libcxxabi/trunk@357551 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/CMakeLists.txt b/CMakeLists.txt
index b774228..4138acf 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -46,6 +46,7 @@
option(LIBCXXABI_ENABLE_EXCEPTIONS "Use exceptions." ON)
option(LIBCXXABI_ENABLE_ASSERTIONS "Enable assertions independent of build mode." ON)
option(LIBCXXABI_ENABLE_PEDANTIC "Compile with pedantic enabled." ON)
+option(LIBCXXABI_ENABLE_PIC "Build Position-Independent Code, even in static library" ON)
option(LIBCXXABI_ENABLE_WERROR "Fail and stop if a warning is triggered." OFF)
option(LIBCXXABI_USE_LLVM_UNWINDER "Build and use the LLVM unwinder." OFF)
option(LIBCXXABI_ENABLE_STATIC_UNWINDER "Statically link the LLVM unwinder." OFF)
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index f8b31c1..9911c98 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -155,6 +155,10 @@
COMPILE_FLAGS
"${LIBCXXABI_COMPILE_FLAGS}")
+ if(LIBCXXABI_ENABLE_PIC)
+ set_target_properties(${name} PROPERTIES POSITION_INDEPENDENT_CODE ON)
+ endif()
+
if(ARGS_DEFINES)
target_compile_definitions(${name} PRIVATE ${ARGS_DEFINES})
endif()
@@ -177,7 +181,6 @@
endif()
cxxabi_object_library(cxxabi_shared_objects)
-set_target_properties(cxxabi_shared_objects PROPERTIES POSITION_INDEPENDENT_CODE ON)
set(cxxabi_static_sources $<TARGET_OBJECTS:cxxabi_static_objects>)
set(cxxabi_shared_sources $<TARGET_OBJECTS:cxxabi_shared_objects>)
