| if (GLIBC_COMPATIBILITY) |
| enable_language(ASM) |
| include(CheckIncludeFile) |
| |
| 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() |
| |
| if (CMAKE_VERSION VERSION_GREATER_EQUAL "3.12") |
| macro(add_glob cur_list) |
| file(GLOB __tmp RELATIVE ${CMAKE_CURRENT_SOURCE_DIR} CONFIGURE_DEPENDS ${ARGN}) |
| list(APPEND ${cur_list} ${__tmp}) |
| endmacro() |
| else () |
| macro(add_glob cur_list) |
| file(GLOB __tmp RELATIVE ${CMAKE_CURRENT_SOURCE_DIR} ${ARGN}) |
| list(APPEND ${cur_list} ${__tmp}) |
| endmacro() |
| endif () |
| |
| macro(add_headers_and_sources prefix common_path) |
| add_glob(${prefix}_headers ${CMAKE_CURRENT_SOURCE_DIR} ${common_path}/*.h) |
| add_glob(${prefix}_sources ${common_path}/*.cpp ${common_path}/*.c ${common_path}/*.h) |
| endmacro() |
| |
| macro(add_headers_only prefix common_path) |
| add_glob(${prefix}_headers ${CMAKE_CURRENT_SOURCE_DIR} ${common_path}/*.h) |
| endmacro() |
| |
| add_headers_and_sources(glibc_compatibility .) |
| add_headers_and_sources(glibc_compatibility musl) |
| if (ARCH_ARM) |
| list (APPEND glibc_compatibility_sources musl/aarch64/syscall.s musl/aarch64/longjmp.s) |
| set (musl_arch_include_dir musl/aarch64) |
| set (MEMCPY_SOURCE memcpy/memcpy_aarch64.cpp) |
| list(REMOVE_ITEM glibc_compatibility_sources musl/getauxval.c) |
| elseif (ARCH_AMD64) |
| list (APPEND glibc_compatibility_sources musl/x86_64/syscall.s musl/x86_64/longjmp.s) |
| set (musl_arch_include_dir musl/x86_64) |
| set (MEMCPY_SOURCE memcpy/memcpy_x86_64.cpp) |
| else () |
| message (FATAL_ERROR "glibc_compatibility can only be used on x86_64 or aarch64.") |
| endif () |
| |
| list(REMOVE_ITEM glibc_compatibility_sources musl/getentropy.c) |
| if(HAVE_SYS_RANDOM_H) |
| list(APPEND glibc_compatibility_sources musl/getentropy.c) |
| endif() |
| |
| # Need to omit frame pointers to match the performance of glibc |
| set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fomit-frame-pointer") |
| |
| # NOTE(amos): getrandom is hard to interpose since we build thirdparty deps |
| # without glibc-compatibility. Also sanitizers might generate getrandom |
| # libcalls. Workaround: Use object file so that linker will always take a |
| # look at its symbol table. |
| list(REMOVE_ITEM glibc_compatibility_sources musl/getrandom.c) |
| # NOTE(amos): sanitizers might generate memcpy references that are too late to |
| # refer. Let's also extract memcpy definitions explicitly to avoid UNDEF GLIBC 2.14. |
| add_library(glibc-compatibility-explicit OBJECT musl/getrandom.c ${MEMCPY_SOURCE}) |
| target_compile_options(glibc-compatibility-explicit PRIVATE -fPIC) |
| add_library(glibc-compatibility STATIC ${glibc_compatibility_sources}) |
| |
| if (COMPILER_CLANG) |
| target_compile_options( |
| glibc-compatibility |
| PRIVATE |
| -Wno-unused-command-line-argument |
| -Wno-unused-but-set-variable |
| -Wno-unused-macros |
| ) |
| elseif (COMPILER_GCC) |
| target_compile_options( |
| glibc-compatibility |
| PRIVATE |
| -Wno-unused-but-set-variable |
| -Wno-implicit-fallthrough |
| -Wno-maybe-uninitialized |
| ) |
| endif () |
| |
| target_include_directories(glibc-compatibility PRIVATE ${musl_arch_include_dir}) |
| target_include_directories(glibc-compatibility-explicit PRIVATE ${musl_arch_include_dir}) |
| |
| message (STATUS "Some symbols from glibc will be replaced for compatibility") |
| else() |
| message (STATUS "not------- compatibility") |
| endif () |
