ClickHouse/libs/libglibc-compatibility/CMakeLists.txt

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CMake
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if (GLIBC_COMPATIBILITY)
set (USE_INTERNAL_MEMCPY ON)
enable_language(ASM)
include(CheckIncludeFile)
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check_include_file("sys/random.h" HAVE_SYS_RANDOM_H)
if(COMPILER_CLANG)
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wno-builtin-requires-header")
endif()
add_headers_and_sources(glibc_compatibility .)
add_headers_and_sources(glibc_compatibility musl)
if (ARCH_ARM)
list (APPEND glibc_compatibility_sources musl/aarch64/syscall.s musl/aarch64/longjmp.s)
set (musl_arch_include_dir musl/aarch64)
elseif (ARCH_AMD64)
list (APPEND glibc_compatibility_sources musl/x86_64/syscall.s musl/x86_64/longjmp.s)
set (musl_arch_include_dir musl/x86_64)
else ()
message (FATAL_ERROR "glibc_compatibility can only be used on x86_64 or aarch64.")
endif ()
list(REMOVE_ITEM glibc_compatibility_sources musl/getentropy.c)
if(HAVE_SYS_RANDOM_H)
list(APPEND glibc_compatibility_sources musl/getentropy.c)
endif()
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# Need to omit frame pointers to match the performance of glibc
set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fomit-frame-pointer")
add_library(glibc-compatibility STATIC ${glibc_compatibility_sources})
if (COMPILER_CLANG)
target_compile_options(glibc-compatibility PRIVATE -Wno-unused-command-line-argument)
elseif (COMPILER_GCC)
target_compile_options(glibc-compatibility PRIVATE -Wno-unused-but-set-variable)
endif ()
target_include_directories(glibc-compatibility PRIVATE libcxxabi ${musl_arch_include_dir})
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if (NOT USE_STATIC_LIBRARIES AND NOT MAKE_STATIC_LIBRARIES)
target_compile_options(glibc-compatibility PRIVATE -fPIC)
endif ()
target_link_libraries(global-libs INTERFACE glibc-compatibility)
install(
TARGETS glibc-compatibility
EXPORT global
ARCHIVE DESTINATION lib
)
message (STATUS "Some symbols from glibc will be replaced for compatibility")
elseif (YANDEX_OFFICIAL_BUILD)
message (WARNING "Option GLIBC_COMPATIBILITY must be turned on for production builds.")
endif ()