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unwind: disable RTTI during the build of libunwind

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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`.
This commit is contained in:
Saleem Abdulrasool
2019-11-06 10:51:42 -08:00
parent a8ccb48f69
commit cbc872a63f
1 changed files with 10 additions and 0 deletions
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10
libunwind/src/CMakeLists.txt
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@@ -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