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include(CheckCCompilerFlag)
include(CheckCSourceCompiles)
include(CheckPrototypeDefinition)
include(CheckSymbolExists)
include(CheckTypeSize)
set(CMAKE_REQUIRED_DEFINITIONS "-D_GNU_SOURCE")
if(ARCH_X86 OR ARCH_X86_64)
check_c_compiler_flag("-mpclmul" HAVE_PCLMUL)
endif(ARCH_X86 OR ARCH_X86_64)
if(ENABLE_LTO)
set(CFLAGS_LTO "-flto")
set(CFLAGS_NO_LTO "-fno-lto")
check_c_compiler_flag("-fwhole-program" HAVE_FLAG_WHOLE_PROGRAM)
if(HAVE_FLAG_WHOLE_PROGRAM)
set(LDFLAGS_LTO "-flto -fwhole-program")
else(HAVE_FLAG_WHOLE_PROGRAM)
set(LDFLAGS_LTO "-flto")
endif(HAVE_FLAG_WHOLE_PROGRAM)
endif(ENABLE_LTO)
check_c_source_compiles("
#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>
int main() {
return AI_ADDRCONFIG;
}
" HAVE_AI_ADDRCONFIG)
check_prototype_definition("get_current_dir_name" "char *get_current_dir_name(void)" "NULL" "unistd.h" HAVE_GET_CURRENT_DIR_NAME)
if(NOT DARWIN)
set(RT_LIBRARY "")
check_symbol_exists("clock_gettime" "time.h" HAVE_CLOCK_GETTIME)
if(NOT HAVE_CLOCK_GETTIME)
set(RT_LIBRARY "rt")
list(APPEND CMAKE_REQUIRED_LIBRARIES "rt")
check_symbol_exists("clock_gettime" "time.h" HAVE_CLOCK_GETTIME_RT)
if(NOT HAVE_CLOCK_GETTIME_RT)
message(FATAL_ERROR "clock_gettime() not found")
endif(NOT HAVE_CLOCK_GETTIME_RT)
endif(NOT HAVE_CLOCK_GETTIME)
endif(NOT DARWIN)
set(CMAKE_EXTRA_INCLUDE_FILES "netinet/if_ether.h")
check_type_size("struct ethhdr" SIZEOF_ETHHDR)
string(COMPARE NOTEQUAL "${SIZEOF_ETHHDR}" "" HAVE_ETHHDR)
set(CMAKE_REQUIRED_INCLUDES "sys/types.h")
if(NOT DARWIN)
check_c_source_compiles("
#include <endian.h>
int main() {
return 0;
}
" HAVE_ENDIAN_H)
if(HAVE_ENDIAN_H)
check_symbol_exists("be32toh" "endian.h" HAVE_LINUX_ENDIAN)
else(HAVE_ENDIAN_H)
check_c_source_compiles("
#include <sys/types.h>
#include <sys/endian.h>
int main() {
return 0;
}
" HAVE_SYS_ENDIAN_H)
if(HAVE_SYS_ENDIAN_H)
check_symbol_exists("be32toh" "sys/types.h;sys/endian.h" HAVE_LINUX_ENDIAN)
else(HAVE_SYS_ENDIAN_H)
message(FATAL_ERROR "Neither <endian.h> nor <sys/endian.h> found")
endif(HAVE_SYS_ENDIAN_H)
endif(HAVE_ENDIAN_H)
endif(NOT DARWIN)
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