[libunwind] cbc872a - unwind: disable RTTI during the build of libunwind
Saleem Abdulrasool via cfe-commits
cfe-commits at lists.llvm.org
Wed Nov 6 10:54:23 PST 2019
Author: Saleem Abdulrasool
Date: 2019-11-06T10:51:42-08:00
New Revision: cbc872a63f81ad9482bb288165af63d7444fa3ed
URL: https://github.com/llvm/llvm-project/commit/cbc872a63f81ad9482bb288165af63d7444fa3ed
DIFF: https://github.com/llvm/llvm-project/commit/cbc872a63f81ad9482bb288165af63d7444fa3ed.diff
LOG: unwind: disable RTTI during the build of libunwind
Disable the type information emission for libunwind. libunwind does not
use `dynamic_cast`. This results in a smaller binary, and more
importantly, avoids the dependency on libc++abi. This ensures that we
have complete symbol resolution of symbols on ELF targets without
linking to the C++ runtime support library. This change avoids the
emission of a reference to `__si_class_type_info`.
Added:
Modified:
libunwind/src/CMakeLists.txt
Removed:
################################################################################
diff --git a/libunwind/src/CMakeLists.txt b/libunwind/src/CMakeLists.txt
index ed20ff0015f4..2dab16afbdf9 100644
--- a/libunwind/src/CMakeLists.txt
+++ b/libunwind/src/CMakeLists.txt
@@ -111,6 +111,11 @@ set_property(SOURCE ${LIBUNWIND_C_SOURCES}
# Build the shared library.
if (LIBUNWIND_ENABLE_SHARED)
add_library(unwind_shared SHARED ${LIBUNWIND_SOURCES} ${LIBUNWIND_HEADERS})
+ if(CMAKE_C_COMPILER_ID STREQUAL MSVC)
+ target_compile_options(unwind_shared PRIVATE /GR-)
+ else()
+ target_compile_options(unwind_shared PRIVATE -fno-rtti)
+ endif()
if(COMMAND llvm_setup_rpath)
llvm_setup_rpath(unwind_shared)
endif()
@@ -142,6 +147,11 @@ endif()
# Build the static library.
if (LIBUNWIND_ENABLE_STATIC)
add_library(unwind_static STATIC ${LIBUNWIND_SOURCES} ${LIBUNWIND_HEADERS})
+ if(CMAKE_C_COMPILER_ID STREQUAL MSVC)
+ target_compile_options(unwind_static PRIVATE /GR-)
+ else()
+ target_compile_options(unwind_static PRIVATE -fno-rtti)
+ endif()
target_link_libraries(unwind_static PRIVATE ${LIBUNWIND_LIBRARIES})
set_target_properties(unwind_static
PROPERTIES
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