mirror of
https://github.com/isar/libmdbx.git
synced 2024-12-28 18:38:48 +08:00
mdbx-cmake: rework linking detection for std::filesystem.
This commit is contained in:
Леонид Юрьев (Leonid Yuriev)
parent
39a4a89650
commit
5ebcb90620
@ -527,6 +527,11 @@ if(MDBX_BUILD_CXX AND NOT CMAKE_CXX_COMPILER_LOADED)
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message(FATAL_ERROR "MDBX_BUILD_CXX=${MDBX_BUILD_CXX}: The C++ compiler is required to build the C++API.")
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endif()
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if(MDBX_BUILD_CXX)
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# determine library for C++ std::filesystem
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probe_libcxx_filesystem()
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endif()
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# Get version
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fetch_version(MDBX "${CMAKE_CURRENT_SOURCE_DIR}" FALSE)
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message(STATUS "libmdbx version is ${MDBX_VERSION}")
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18
GNUmakefile
18
GNUmakefile
@ -12,13 +12,21 @@ $(info // The GNU Make $(MAKE_VERSION))
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SHELL := $(shell env bash -c 'echo $$BASH')
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MAKE_VERx3 := $(shell printf "%3s%3s%3s" $(subst ., ,$(MAKE_VERSION)))
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make_lt_3_81 := $(shell expr "$(MAKE_VERx3)" "<" " 3 81")
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ifeq ($(make_lt_3_81),1)
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ifneq ($(make_lt_3_81),0)
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$(error Please use GNU Make 3.81 or above)
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endif
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make_lt_4_1 := $(shell expr "$(MAKE_VERx3)" "<" " 4 1")
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make_ge_4_1 := $(shell expr "$(MAKE_VERx3)" ">=" " 4 1")
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SRC_PROBE_C := $(shell [ -f mdbx.c ] && echo mdbx.c || echo src/osal.c)
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SRC_PROBE_CXX := $(shell [ -f mdbx.c++ ] && echo mdbx.c++ || echo src/mdbx.c++)
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UNAME := $(shell uname -s 2>/dev/null || echo Unknown)
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define cxx_filesystem_probe
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int main(int argc, const char*argv[]) {
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mdbx::filesystem::path probe(argv[0]);
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if (argc != 1) throw mdbx::filesystem::filesystem_error(std::string("fake"), std::error_code());
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return mdbx::filesystem::is_directory(probe.relative_path());
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}
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endef
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#
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################################################################################
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#
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@ -57,16 +65,16 @@ CXXFLAGS ?= $(strip $(CXXSTD) $(filter-out -std=gnu11,$(CFLAGS)))
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# libraries adn options for linking
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EXE_LDFLAGS ?= -pthread
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ifeq ($(make_lt_4_1),1)
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ifneq ($(make_ge_4_1),1)
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# don't use variable expansion trick as workaround for bugs of GNU Make before 4.1
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LIBS ?= $(shell $(uname2libs))
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LDFLAGS ?= $(shell $(uname2ldflags))
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LIB_STDCXXFS ?= $(shell echo 'int main(void) { MDBX_STD_FILESYSTEM_PATH probe; return probe.is_absolute(); }' | cat mdbx.h++ - | sed $$'1s/\xef\xbb\xbf//' | $(CXX) -x c++ $(CXXFLAGS) -Wno-error - -Wl,--allow-multiple-definition -lstdc++fs $(LIBS) $(LDFLAGS) $(EXE_LDFLAGS) -o /dev/null 2>probe4lstdfs.err >/dev/null && echo '-Wl,--allow-multiple-definition -lstdc++fs')
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LIB_STDCXXFS ?= $(shell echo '$(cxx_filesystem_probe)' | cat mdbx.h++ - | sed $$'1s/\xef\xbb\xbf//' | $(CXX) -x c++ $(CXXFLAGS) -Wno-error - -Wl,--allow-multiple-definition -lstdc++fs $(LIBS) $(LDFLAGS) $(EXE_LDFLAGS) -o /dev/null 2>probe4lstdfs.err >/dev/null && echo '-Wl,--allow-multiple-definition -lstdc++fs')
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else
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# using variable expansion trick to avoid repeaded probes
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LIBS ?= $(eval LIBS := $$(shell $$(uname2libs)))$(LIBS)
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LDFLAGS ?= $(eval LDFLAGS := $$(shell $$(uname2ldflags)))$(LDFLAGS)
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LIB_STDCXXFS ?= $(eval LIB_STDCXXFS := $$(shell echo 'int main(void) { MDBX_STD_FILESYSTEM_PATH probe; return probe.is_absolute(); }' | cat mdbx.h++ - | sed $$$$'1s/\xef\xbb\xbf//' | $(CXX) -x c++ $(CXXFLAGS) -Wno-error - -Wl,--allow-multiple-definition -lstdc++fs $(LIBS) $(LDFLAGS) $(EXE_LDFLAGS) -o /dev/null 2>probe4lstdfs.err >/dev/null && echo '-Wl,--allow-multiple-definition -lstdc++fs'))$(LIB_STDCXXFS)
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LIB_STDCXXFS ?= $(eval LIB_STDCXXFS := $$(shell echo '$$(cxx_filesystem_probe)' | cat mdbx.h++ - | sed $$$$'1s/\xef\xbb\xbf//' | $(CXX) -x c++ $(CXXFLAGS) -Wno-error - -Wl,--allow-multiple-definition -lstdc++fs $(LIBS) $(LDFLAGS) $(EXE_LDFLAGS) -o /dev/null 2>probe4lstdfs.err >/dev/null && echo '-Wl,--allow-multiple-definition -lstdc++fs'))$(LIB_STDCXXFS)
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endif
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################################################################################
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@ -826,24 +826,106 @@ macro(setup_compile_flags)
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unset(MODULE_LINKER_FLAGS)
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endmacro(setup_compile_flags)
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if(CMAKE_CXX_COMPILER_LOADED)
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# determine library for std::filesystem
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set(LIBCXX_FILESYSTEM "")
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if(CMAKE_COMPILER_IS_ELBRUSCXX)
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if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS 1.26.0)
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set(LIBCXX_FILESYSTEM "stdc++fs")
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endif()
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elseif(CMAKE_COMPILER_IS_CLANG)
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if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS 5.0)
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set(LIBCXX_FILESYSTEM "c++experimental")
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elseif(CMAKE_CXX_COMPILER_VERSION VERSION_LESS 9.0)
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set(LIBCXX_FILESYSTEM "stdc++fs")
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endif()
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elseif(CMAKE_COMPILER_IS_GNUCXX AND NOT MINGW)
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if(NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 5.3 AND CMAKE_CXX_COMPILER_VERSION VERSION_LESS 9.0)
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set(LIBCXX_FILESYSTEM "stdc++fs")
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macro(probe_libcxx_filesystem)
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if(CMAKE_CXX_COMPILER_LOADED AND NOT DEFINED LIBCXX_FILESYSTEM)
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list(FIND CMAKE_CXX_COMPILE_FEATURES cxx_std_11 HAS_CXX11)
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if(NOT HAS_CXX11 LESS 0)
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include(CMakePushCheckState)
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include(CheckCXXSourceCompiles)
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cmake_push_check_state()
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set(stdfs_probe_save_libraries ${CMAKE_REQUIRED_LIBRARIES})
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unset(stdfs_probe_clear_cxx_standard)
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if(NOT DEFINED CMAKE_CXX_STANDARD)
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list(FIND CMAKE_CXX_COMPILE_FEATURES cxx_std_14 HAS_CXX14)
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list(FIND CMAKE_CXX_COMPILE_FEATURES cxx_std_17 HAS_CXX17)
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if(NOT HAS_CXX17 LESS 0
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AND NOT (CMAKE_COMPILER_IS_CLANG AND CMAKE_CXX_COMPILER_VERSION VERSION_LESS 5))
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set(CMAKE_CXX_STANDARD 17)
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elseif(NOT HAS_CXX14 LESS 0)
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set(CMAKE_CXX_STANDARD 14)
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else()
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set(CMAKE_CXX_STANDARD 11)
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endif()
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set(stdfs_probe_clear_cxx_standard ON)
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endif()
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set(stdfs_probe_code [[
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#if defined(__SIZEOF_INT128__) && !defined(__GLIBCXX_TYPE_INT_N_0) && defined(__clang__) && __clang_major__ < 4
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#define __GLIBCXX_BITSIZE_INT_N_0 128
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#define __GLIBCXX_TYPE_INT_N_0 __int128
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#endif
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#ifndef __has_include
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#define __has_include(header) (0)
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#endif
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#if __has_include(<version>)
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#include <version>
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#endif
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#include <cstdlib>
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#include <string>
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#if defined(__cpp_lib_string_view) && __cpp_lib_string_view >= 201606L
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#include <string_view>
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#endif
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#if defined(__cpp_lib_filesystem) && __cpp_lib_filesystem >= 201703L
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#include <filesystem>
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#else
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#include <experimental/filesystem>
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#endif
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#if (defined(__cpp_lib_filesystem) && __cpp_lib_filesystem >= 201703L && (!defined(__MAC_OS_X_VERSION_MIN_REQUIRED) || __MAC_OS_X_VERSION_MIN_REQUIRED >= 101500) && (!defined(__IPHONE_OS_VERSION_MIN_REQUIRED) || __IPHONE_OS_VERSION_MIN_REQUIRED >= 130100))
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namespace fs = ::std::filesystem;
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#elif defined(__cpp_lib_experimental_filesystem) && __cpp_lib_experimental_filesystem >= 201406L
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namespace fs = ::std::experimental::filesystem;
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#endif
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int main(int argc, const char*argv[]) {
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fs::path probe(argv[0]);
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if (argc != 1) throw fs::filesystem_error(std::string("fake"), std::error_code());
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return fs::is_directory(probe.relative_path());
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}
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]])
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set(LIBCXX_FILESYSTEM "")
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check_cxx_source_compiles("${stdfs_probe_code}" LIBCXX_FILESYSTEM_none)
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if(LIBCXX_FILESYSTEM_none)
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message(STATUS "No linking with additional library needed for std::filesystem")
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else()
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set(CMAKE_REQUIRED_LIBRARIES ${stdfs_probe_save_libraries} "stdc++fs")
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check_cxx_source_compiles("${stdfs_probe_code}" LIBCXX_FILESYSTEM_stdcxxfs)
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if(LIBCXX_FILESYSTEM_stdcxxfs)
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set(LIBCXX_FILESYSTEM "stdc++fs")
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message(STATUS "Linking with ${LIBCXX_FILESYSTEM} is required for std::filesystem")
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else()
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set(CMAKE_REQUIRED_LIBRARIES ${stdfs_probe_save_libraries} "c++fs")
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check_cxx_source_compiles("${stdfs_probe_code}" LIBCXX_FILESYSTEM_cxxfs)
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if(LIBCXX_FILESYSTEM_cxxfs)
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set(LIBCXX_FILESYSTEM "c++fs")
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message(STATUS "Linking with ${LIBCXX_FILESYSTEM} is required for std::filesystem")
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else()
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set(CMAKE_REQUIRED_LIBRARIES ${stdfs_probe_save_libraries} "c++experimental")
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check_cxx_source_compiles("${stdfs_probe_code}" LIBCXX_FILESYSTEM_cxxexperimental)
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if(LIBCXX_FILESYSTEM_cxxexperimental)
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set(LIBCXX_FILESYSTEM "c++experimental")
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message(STATUS "Linking with ${LIBCXX_FILESYSTEM} is required for std::filesystem")
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else()
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message(STATUS "No support for std::filesystem")
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endif()
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endif()
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endif()
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endif()
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set(CMAKE_REQUIRED_LIBRARIES ${stdfs_probe_save_libraries})
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if(stdfs_probe_clear_cxx_standard)
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unset(CMAKE_CXX_STANDARD)
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endif()
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unset(stdfs_probe_clear_cxx_standard)
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unset(stdfs_probe_save_libraries)
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unset(stdfs_probe_code)
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unset(stdfs_probe_rc)
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cmake_pop_check_state()
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endif()
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endif()
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endif()
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endmacro(probe_libcxx_filesystem)
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cmake_policy(POP)
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@ -31,6 +31,7 @@ set(LIBMDBX_TEST_SOURCES
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)
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if(NOT MDBX_BUILD_CXX)
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probe_libcxx_filesystem()
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list(APPEND LIBMDBX_TEST_SOURCES "${MDBX_SOURCE_DIR}/mdbx.c++" ../mdbx.h++)
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endif()
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