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llvm-project/libunwind/cmake/config-ix.cmake

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[runtimes] Use -Wunknown-pragmas for the pragma check This is a follow up to r362055, we need -Wunknown-pragmas otherwise the check is going to succeed it the pragma isn't supported. llvm-svn: 362057
2019-05-30 13:38:06 +08:00
include(CMakePushCheckState)
libunwind: add new build logic This replicates most of the build infrastructure from libc++abi ported to libunwind. This allows building libunwind without requiring libc++abi. llvm-svn: 235795
2015-04-25 09:46:35 +08:00
include(CheckCCompilerFlag)
include(CheckCXXCompilerFlag)
include(CheckLibraryExists)
Reland "Enable `-funwind-tables` flag when building libunwind" Summary: Relands https://reviews.llvm.org/D70815. The original commit set `CMAKE_TRY_COMPILE_TARGET_TYPE` to `STATIC_LIBRARY` globally in libunwind/CMakeLists.txt, which effectively disabled the linking step in CMake checks. This broke some builds (see 938c70b86c7d2165f8c28d5700e9c1ac1263307e). Here we set CMAKE_TRY_COMPILE_TARGET_TYPE to STATIC_LIBRARY only when checking for presence of the `-funwind-tables` flag, and then set it back to the original value so it doesn't affect other checks. Reviewers: mstorsjo, jfb Subscribers: mgorny, christof, libcxx-commits Tags: #libc Differential Revision: https://reviews.llvm.org/D71117
2019-12-06 22:26:35 +08:00
include(CheckSymbolExists)
[runtimes] Check if pragma comment(lib, ...) is supported first This fixes the issue introduced by r362048 where we always use pragma comment(lib, ...) for dependent libraries when the compiler is Clang, but older Clang versions don't support this pragma so we need to check first if it's supported before using it. llvm-svn: 362055
2019-05-30 12:40:21 +08:00
include(CheckCSourceCompiles)
libunwind: add new build logic This replicates most of the build infrastructure from libc++abi ported to libunwind. This allows building libunwind without requiring libc++abi. llvm-svn: 235795
2015-04-25 09:46:35 +08:00
Revert "[CMake] Use __libc_start_main rather than fopen when checking for C library" This reverts commit r352341: it broke the build on macOS which doesn't seem to provide __libc_start_main in its C library. llvm-svn: 352411
2019-01-29 03:26:41 +08:00
check_library_exists(c fopen "" LIBUNWIND_HAS_C_LIB)
Reland "[CMake][libunwind] Use -nodefaultlibs for CMake checks" This is a reland of commit r299796. Turned out that we need gcc_s or compiler-rt on ARM when checking the support for -funwind-tables which creates a dependency on __aeabi_unwind_cpp_pr0 symbol that's provided by the compiler runtime. Differential Revision: https://reviews.llvm.org/D31858 llvm-svn: 300020
2017-04-12 10:28:07 +08:00
if (NOT LIBUNWIND_USE_COMPILER_RT)
[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
2020-04-24 12:19:11 +08:00
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 ()
Reland "[CMake][libunwind] Use -nodefaultlibs for CMake checks" This is a reland of commit r299796. Turned out that we need gcc_s or compiler-rt on ARM when checking the support for -funwind-tables which creates a dependency on __aeabi_unwind_cpp_pr0 symbol that's provided by the compiler runtime. Differential Revision: https://reviews.llvm.org/D31858 llvm-svn: 300020
2017-04-12 10:28:07 +08:00
endif()
[SystemZ][ZOS] Prefer -nostdlib++ as opposed to -nodefaultlibs when building c++ libraries Let's use -nostdlib++ rather than -nodefaultlibs when building libc++/libc++abi/libunwind libraries. The default is -nostdlib++ if supported by a build compiler like it is the case with clang, otherwise -nodefaultlibs is used as before. This change is needed to avoid additional changes at the link step and not to increase the maintenance costs. If clang with -nodefaultlibs is used all the libraries which are removed but required would have to be manually added in. This set of libraries are unique and will send out. The propose change will allow to make the link step simple for other platforms as well. Reviewed By: #libc, #libc_abi, ldionne Differential Revision: https://reviews.llvm.org/D95875
2021-02-17 02:02:22 +08:00
# libunwind is using -nostdlib++ at the link step when available,
# otherwise -nodefaultlibs is used. We want all our checks to also
# use one of these options, otherwise we may end up with an inconsistency between
Reland "[CMake][libunwind] Use -nodefaultlibs for CMake checks" This is a reland of commit r299796. Turned out that we need gcc_s or compiler-rt on ARM when checking the support for -funwind-tables which creates a dependency on __aeabi_unwind_cpp_pr0 symbol that's provided by the compiler runtime. Differential Revision: https://reviews.llvm.org/D31858 llvm-svn: 300020
2017-04-12 10:28:07 +08:00
# the flags we think we require during configuration (if the checks are
[SystemZ][ZOS] Prefer -nostdlib++ as opposed to -nodefaultlibs when building c++ libraries Let's use -nostdlib++ rather than -nodefaultlibs when building libc++/libc++abi/libunwind libraries. The default is -nostdlib++ if supported by a build compiler like it is the case with clang, otherwise -nodefaultlibs is used as before. This change is needed to avoid additional changes at the link step and not to increase the maintenance costs. If clang with -nodefaultlibs is used all the libraries which are removed but required would have to be manually added in. This set of libraries are unique and will send out. The propose change will allow to make the link step simple for other platforms as well. Reviewed By: #libc, #libc_abi, ldionne Differential Revision: https://reviews.llvm.org/D95875
2021-02-17 02:02:22 +08:00
# performed without one of those options) and the flags that are actually
# required during compilation (which has the -nostdlib++ or -nodefaultlibs). libc is
Reland "[CMake][libunwind] Use -nodefaultlibs for CMake checks" This is a reland of commit r299796. Turned out that we need gcc_s or compiler-rt on ARM when checking the support for -funwind-tables which creates a dependency on __aeabi_unwind_cpp_pr0 symbol that's provided by the compiler runtime. Differential Revision: https://reviews.llvm.org/D31858 llvm-svn: 300020
2017-04-12 10:28:07 +08:00
# required for the link to go through. We remove sanitizers from the
# configuration checks to avoid spurious link errors.
[SystemZ][ZOS] Prefer -nostdlib++ as opposed to -nodefaultlibs when building c++ libraries Let's use -nostdlib++ rather than -nodefaultlibs when building libc++/libc++abi/libunwind libraries. The default is -nostdlib++ if supported by a build compiler like it is the case with clang, otherwise -nodefaultlibs is used as before. This change is needed to avoid additional changes at the link step and not to increase the maintenance costs. If clang with -nodefaultlibs is used all the libraries which are removed but required would have to be manually added in. This set of libraries are unique and will send out. The propose change will allow to make the link step simple for other platforms as well. Reviewed By: #libc, #libc_abi, ldionne Differential Revision: https://reviews.llvm.org/D95875
2021-02-17 02:02:22 +08:00
check_c_compiler_flag(-nostdlib++ LIBUNWIND_SUPPORTS_NOSTDLIBXX_FLAG)
if (LIBUNWIND_SUPPORTS_NOSTDLIBXX_FLAG)
set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -nostdlib++")
else()
check_c_compiler_flag(-nodefaultlibs LIBUNWIND_SUPPORTS_NODEFAULTLIBS_FLAG)
if (LIBUNWIND_SUPPORTS_NODEFAULTLIBS_FLAG)
set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -nodefaultlibs")
endif()
endif()
if (LIBUNWIND_SUPPORTS_NOSTDLIBXX_FLAG OR LIBUNWIND_SUPPORTS_NODEFAULTLIBS_FLAG)
Reland "[CMake][libunwind] Use -nodefaultlibs for CMake checks" This is a reland of commit r299796. Turned out that we need gcc_s or compiler-rt on ARM when checking the support for -funwind-tables which creates a dependency on __aeabi_unwind_cpp_pr0 symbol that's provided by the compiler runtime. Differential Revision: https://reviews.llvm.org/D31858 llvm-svn: 300020
2017-04-12 10:28:07 +08:00
if (LIBUNWIND_HAS_C_LIB)
list(APPEND CMAKE_REQUIRED_LIBRARIES c)
endif ()
if (LIBUNWIND_USE_COMPILER_RT)
find_compiler_rt_library(builtins LIBUNWIND_BUILTINS_LIBRARY)
list(APPEND CMAKE_REQUIRED_LIBRARIES "${LIBUNWIND_BUILTINS_LIBRARY}")
[CMake] Link to compiler-rt if LIBUNWIND_USE_COMPILER_RT is ON. Summary: If `-nodefaultlibs` is given, we weren't actually linking to it. This was true irrespective of passing `-rtlib=compiler-rt` (see previous patch). Now we explicitly link it to handle that case. I wonder if we should be linking these libraries only if we're using `-nodefaultlibs`... Reviewers: beanz Subscribers: dberris, mgorny, christof, chrib, cfe-commits Differential Revision: https://reviews.llvm.org/D51657 llvm-svn: 343990
2018-10-09 02:35:00 +08:00
else ()
if (LIBUNWIND_HAS_GCC_S_LIB)
list(APPEND CMAKE_REQUIRED_LIBRARIES gcc_s)
endif ()
if (LIBUNWIND_HAS_GCC_LIB)
list(APPEND CMAKE_REQUIRED_LIBRARIES gcc)
endif ()
Reland "[CMake][libunwind] Use -nodefaultlibs for CMake checks" This is a reland of commit r299796. Turned out that we need gcc_s or compiler-rt on ARM when checking the support for -funwind-tables which creates a dependency on __aeabi_unwind_cpp_pr0 symbol that's provided by the compiler runtime. Differential Revision: https://reviews.llvm.org/D31858 llvm-svn: 300020
2017-04-12 10:28:07 +08:00
endif ()
Add CMake support for building for MinGW This section is similar to what already exists in libcxx and libcxxabi. Differential Revision: https://reviews.llvm.org/D38380 llvm-svn: 314716
2017-10-03 04:46:37 +08:00
if (MINGW)
# Mingw64 requires quite a few "C" runtime libraries in order for basic
# programs to link successfully with -nodefaultlibs.
if (LIBUNWIND_USE_COMPILER_RT)
set(MINGW_RUNTIME ${LIBUNWIND_BUILTINS_LIBRARY})
else ()
set(MINGW_RUNTIME gcc_s gcc)
endif()
set(MINGW_LIBRARIES mingw32 ${MINGW_RUNTIME} moldname mingwex msvcrt advapi32
shell32 user32 kernel32 mingw32 ${MINGW_RUNTIME}
moldname mingwex msvcrt)
list(APPEND CMAKE_REQUIRED_LIBRARIES ${MINGW_LIBRARIES})
endif()
Reland "[CMake][libunwind] Use -nodefaultlibs for CMake checks" This is a reland of commit r299796. Turned out that we need gcc_s or compiler-rt on ARM when checking the support for -funwind-tables which creates a dependency on __aeabi_unwind_cpp_pr0 symbol that's provided by the compiler runtime. Differential Revision: https://reviews.llvm.org/D31858 llvm-svn: 300020
2017-04-12 10:28:07 +08:00
if (CMAKE_C_FLAGS MATCHES -fsanitize OR CMAKE_CXX_FLAGS MATCHES -fsanitize)
set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -fno-sanitize=all")
endif ()
if (CMAKE_C_FLAGS MATCHES -fsanitize-coverage OR CMAKE_CXX_FLAGS MATCHES -fsanitize-coverage)
set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -fno-sanitize-coverage=edge,trace-cmp,indirect-calls,8bit-counters")
endif ()
endif ()
[runtimes] Check if pragma comment(lib, ...) is supported first This fixes the issue introduced by r362048 where we always use pragma comment(lib, ...) for dependent libraries when the compiler is Clang, but older Clang versions don't support this pragma so we need to check first if it's supported before using it. llvm-svn: 362055
2019-05-30 12:40:21 +08:00
# Check compiler pragmas
if(CMAKE_CXX_COMPILER_ID MATCHES "Clang")
[runtimes] Use -Wunknown-pragmas for the pragma check This is a follow up to r362055, we need -Wunknown-pragmas otherwise the check is going to succeed it the pragma isn't supported. llvm-svn: 362057
2019-05-30 13:38:06 +08:00
cmake_push_check_state()
set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -Werror=unknown-pragmas")
[runtimes] Check if pragma comment(lib, ...) is supported first This fixes the issue introduced by r362048 where we always use pragma comment(lib, ...) for dependent libraries when the compiler is Clang, but older Clang versions don't support this pragma so we need to check first if it's supported before using it. llvm-svn: 362055
2019-05-30 12:40:21 +08:00
check_c_source_compiles("
#pragma comment(lib, \"c\")
int main() { return 0; }
" LIBUNWIND_HAS_COMMENT_LIB_PRAGMA)
[runtimes] Use -Wunknown-pragmas for the pragma check This is a follow up to r362055, we need -Wunknown-pragmas otherwise the check is going to succeed it the pragma isn't supported. llvm-svn: 362057
2019-05-30 13:38:06 +08:00
cmake_pop_check_state()
[runtimes] Check if pragma comment(lib, ...) is supported first This fixes the issue introduced by r362048 where we always use pragma comment(lib, ...) for dependent libraries when the compiler is Clang, but older Clang versions don't support this pragma so we need to check first if it's supported before using it. llvm-svn: 362055
2019-05-30 12:40:21 +08:00
endif()
libunwind: add new build logic This replicates most of the build infrastructure from libc++abi ported to libunwind. This allows building libunwind without requiring libc++abi. llvm-svn: 235795
2015-04-25 09:46:35 +08:00
# Check compiler flags
[libunwind] Refactor CMake flag checks to match libc++ and libc++abi libunwind was using its own set of macros/functions for flag checking which was similar but different from libc++ and libc++abi. This made it difficult to replicate the same checks across projects, in fact there were some checks that appear to have been copy & pasted from another project and that were broken in the standalone libunwind build. This change refactors flag checks to match libc++ and libc++abi using a copy of HandleLibunwindFlags.cmake which is derived from the versions used by the other projects. This also paves a road to deduplicating and unifying HandleLibunwindFlags.cmake, HandleLibcxxabiFlags.cmake and HandleLibcxxFlags.cmake post monorepo switch. Differential Revision: https://reviews.llvm.org/D68855 llvm-svn: 374606
2019-10-12 06:22:29 +08:00
check_cxx_compiler_flag(-nostdinc++ LIBUNWIND_HAS_NOSTDINCXX_FLAG)
libunwind: add new build logic This replicates most of the build infrastructure from libc++abi ported to libunwind. This allows building libunwind without requiring libc++abi. llvm-svn: 235795
2015-04-25 09:46:35 +08:00
Reland "Enable `-funwind-tables` flag when building libunwind" Summary: Relands https://reviews.llvm.org/D70815. The original commit set `CMAKE_TRY_COMPILE_TARGET_TYPE` to `STATIC_LIBRARY` globally in libunwind/CMakeLists.txt, which effectively disabled the linking step in CMake checks. This broke some builds (see 938c70b86c7d2165f8c28d5700e9c1ac1263307e). Here we set CMAKE_TRY_COMPILE_TARGET_TYPE to STATIC_LIBRARY only when checking for presence of the `-funwind-tables` flag, and then set it back to the original value so it doesn't affect other checks. Reviewers: mstorsjo, jfb Subscribers: mgorny, christof, libcxx-commits Tags: #libc Differential Revision: https://reviews.llvm.org/D71117
2019-12-06 22:26:35 +08:00
# Check symbols
check_symbol_exists(__arm__ "" LIBUNWIND_TARGET_ARM)
check_symbol_exists(__USING_SJLJ_EXCEPTIONS__ "" LIBUNWIND_USES_SJLJ_EXCEPTIONS)
check_symbol_exists(__ARM_DWARF_EH__ "" LIBUNWIND_USES_DWARF_EH)
if(LIBUNWIND_TARGET_ARM AND NOT LIBUNWIND_USES_SJLJ_EXCEPTIONS AND NOT LIBUNWIND_USES_DWARF_EH)
# This condition is copied from __libunwind_config.h
set(LIBUNWIND_USES_ARM_EHABI ON)
endif()
[unwind] Don't link libpthread and libdl on Fuchsia This is a follow up to D71135.
2019-12-18 09:18:24 +08:00
# Check libraries
if(FUCHSIA)
set(LIBUNWIND_HAS_DL_LIB NO)
set(LIBUNWIND_HAS_PTHREAD_LIB NO)
else()
check_library_exists(dl dladdr "" LIBUNWIND_HAS_DL_LIB)
check_library_exists(pthread pthread_once "" LIBUNWIND_HAS_PTHREAD_LIB)
endif()