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[libcxx][libcxxabi][libunwind] Use libgcc on Android 

Android doesn't have a libgcc_s and uses libgcc instead, so adjust the
build accordingly. This matches compiler-rt's build setup. libc++abi and
libunwind were already checking for libgcc but in a different context.
This change makes them search only for libgcc on Android now, but the
code to link against libgcc if it were present was already there.

Reviewed By: #libc, #libc_abi, #libunwind, rprichard, srhines

Differential Revision: https://reviews.llvm.org/D78787
This commit is contained in:
Shoaib Meenai 2020-04-23 21:19:11 -07:00
parent c14ac8043e
commit cc259638cb
4 changed files with 21 additions and 5 deletions
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2
libcxx/CMakeLists.txt
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@ -757,6 +757,8 @@ function(cxx_link_system_libraries target)
if (LIBCXX_BUILTINS_LIBRARY)
target_link_libraries(${target} PRIVATE "${LIBCXX_BUILTINS_LIBRARY}")
endif()
elseif (LIBCXX_HAS_GCC_LIB)
target_link_libraries(${target} PRIVATE gcc)
elseif (LIBCXX_HAS_GCC_S_LIB)
target_link_libraries(${target} PRIVATE gcc_s)
endif()

8
libcxx/cmake/config-ix.cmake
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@ -16,7 +16,11 @@ if (NOT LIBCXX_USE_COMPILER_RT)
if(WIN32 AND NOT MINGW)
set(LIBCXX_HAS_GCC_S_LIB NO)
else()
check_library_exists(gcc_s __gcc_personality_v0 "" LIBCXX_HAS_GCC_S_LIB)
if(ANDROID)
check_library_exists(gcc __gcc_personality_v0 "" LIBCXX_HAS_GCC_LIB)
else()
check_library_exists(gcc_s __gcc_personality_v0 "" LIBCXX_HAS_GCC_S_LIB)
endif()
endif()
endif()
@ -37,6 +41,8 @@ if (LIBCXX_SUPPORTS_NODEFAULTLIBS_FLAG)
list(APPEND CMAKE_REQUIRED_FLAGS -rtlib=compiler-rt)
find_compiler_rt_library(builtins LIBCXX_BUILTINS_LIBRARY)
list(APPEND CMAKE_REQUIRED_LIBRARIES "${LIBCXX_BUILTINS_LIBRARY}")
elseif (LIBCXX_HAS_GCC_LIB)
list(APPEND CMAKE_REQUIRED_LIBRARIES gcc)
elseif (LIBCXX_HAS_GCC_S_LIB)
list(APPEND CMAKE_REQUIRED_LIBRARIES gcc_s)
endif ()

8
libcxxabi/cmake/config-ix.cmake
View File

@ -6,8 +6,12 @@ include(CheckCSourceCompiles)
check_library_exists(c fopen "" LIBCXXABI_HAS_C_LIB)
if (NOT LIBCXXABI_USE_COMPILER_RT)
check_library_exists(gcc_s __gcc_personality_v0 "" LIBCXXABI_HAS_GCC_S_LIB)
check_library_exists(gcc __aeabi_uldivmod "" LIBCXXABI_HAS_GCC_LIB)
if (ANDROID)
check_library_exists(gcc __gcc_personality_v0 "" LIBCXXABI_HAS_GCC_LIB)
else ()
check_library_exists(gcc_s __gcc_personality_v0 "" LIBCXXABI_HAS_GCC_S_LIB)
check_library_exists(gcc __aeabi_uldivmod "" LIBCXXABI_HAS_GCC_LIB)
endif ()
endif ()
# libc++abi is built with -nodefaultlibs, so we want all our checks to also

8
libunwind/cmake/config-ix.cmake
View File

@ -8,8 +8,12 @@ include(CheckCSourceCompiles)
check_library_exists(c fopen "" LIBUNWIND_HAS_C_LIB)
if (NOT LIBUNWIND_USE_COMPILER_RT)
check_library_exists(gcc_s __gcc_personality_v0 "" LIBUNWIND_HAS_GCC_S_LIB)
check_library_exists(gcc __absvdi2 "" LIBUNWIND_HAS_GCC_LIB)
if (ANDROID)
check_library_exists(gcc __gcc_personality_v0 "" LIBUNWIND_HAS_GCC_LIB)
else ()
check_library_exists(gcc_s __gcc_personality_v0 "" LIBUNWIND_HAS_GCC_S_LIB)
check_library_exists(gcc __absvdi2 "" LIBUNWIND_HAS_GCC_LIB)
endif ()
endif()
# libunwind is built with -nodefaultlibs, so we want all our checks to also