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include(CheckTypeSize)
include(CheckSymbolExists)
include(CheckFunctionExists)
include(CheckIncludeFiles)
include(CheckCSourceRuns)
include(CheckCSourceCompiles)
check_c_source_compiles("
#include <execinfo.h>
int main(void)
{
void *trace[1];
backtrace(trace, 1);
return 0;
}
" HAVE_EXECINFO_BACKTRACE)
check_c_source_compiles("
int main(void)
{
int a = 42;
__builtin_add_overflow(a, a, &a);
__builtin_sub_overflow(a, a, &a);
return 0;
}
" HAVE_BUILTIN_ADD_OVERFLOW)
check_type_size("int" SIZEOF_INT LANGUAGE C)
check_type_size("long" SIZEOF_LONG LANGUAGE C)
check_type_size("intmax_t" SIZEOF_INTMAX_T LANGUAGE C)
check_type_size("int32_t" SIZEOF_INT32_T LANGUAGE C)
check_type_size("size_t" SIZEOF_SIZE_T LANGUAGE C)
check_type_size("long long" SIZEOF_LONG_LONG LANGUAGE C)
check_type_size("void *" SIZEOF_VOID_PTR LANGUAGE C)
check_symbol_exists(_NSGetEnviron crt_externs.h HAVE__NSGETENVIRON)
# Headers
check_include_files(langinfo.h HAVE_LANGINFO_H)
check_include_files(locale.h HAVE_LOCALE_H)
check_include_files(pwd.h HAVE_PWD_H)
check_include_files(strings.h HAVE_STRINGS_H)
check_include_files(sys/utsname.h HAVE_SYS_UTSNAME_H)
check_include_files(termios.h HAVE_TERMIOS_H)
check_include_files(sys/uio.h HAVE_SYS_UIO_H)
check_include_files(sys/sdt.h HAVE_SYS_SDT_H)
# Functions
check_function_exists(fseeko HAVE_FSEEKO)
check_function_exists(getpwent HAVE_GETPWENT)
check_function_exists(getpwnam HAVE_GETPWNAM)
check_function_exists(getpwuid HAVE_GETPWUID)
check_function_exists(readv HAVE_READV)
check_function_exists(opendir HAVE_OPENDIR)
check_function_exists(readlink HAVE_READLINK)
check_function_exists(setpgid HAVE_SETPGID)
check_function_exists(setsid HAVE_SETSID)
check_function_exists(sigaction HAVE_SIGACTION)
check_function_exists(strnlen HAVE_STRNLEN)
check_function_exists(strcasecmp HAVE_STRCASECMP)
check_function_exists(strncasecmp HAVE_STRNCASECMP)
check_function_exists(strptime HAVE_STRPTIME)
check_c_source_compiles("
#include <sys/types.h>
#include <dirent.h>
int main(void)
{
DIR *dir = opendir(\"dirname\");
dirfd(dir);
return 0;
}
" HAVE_DIRFD)
check_c_source_compiles("
#include <sys/file.h>
int main(void)
{
flock(10, LOCK_SH);
return 0;
}
" HAVE_FLOCK)
if(CMAKE_SYSTEM_NAME STREQUAL "SunOS")
check_c_source_compiles("
#include <termios.h>
int
main(void)
{
return forkpty(0, NULL, NULL, NULL);
}
" HAVE_FORKPTY)
else()
set(HAVE_FORKPTY 1)
endif()
# Symbols
check_symbol_exists(FD_CLOEXEC "fcntl.h" HAVE_FD_CLOEXEC)
if(HAVE_LANGINFO_H)
check_symbol_exists(CODESET "langinfo.h" HAVE_NL_LANGINFO_CODESET)
endif()
check_include_files("endian.h" HAVE_ENDIAN_H)
check_include_files("sys/endian.h" HAVE_SYS_ENDIAN_H)
set(ENDIAN_INCLUDE_FILE "endian.h")
if(HAVE_SYS_ENDIAN_H AND NOT HAVE_ENDIAN_H)
set(ENDIAN_INCLUDE_FILE "sys/endian.h")
endif()
set(SI "#include <stdint.h>\n")
set(MS "int main(int argc,char**argv)\n{\n uint64_t i=0x0102030405060708ULL;")
set(ME "}")
check_c_source_compiles("
#define _BSD_SOURCE 1
#define _DEFAULT_SOURCE 1
${SI}
#include <${ENDIAN_INCLUDE_FILE}>
#ifndef be64toh
# error No be64toh macros
#endif
${MS}
uint64_t j = be64toh(i);
return (j == 0); // j must not be zero
${ME}"
HAVE_BE64TOH_MACROS)
if(NOT "${HAVE_BE64TOH_MACROS}")
check_function_exists(be64toh HAVE_BE64TOH_FUNC)
endif()
if("${HAVE_BE64TOH_MACROS}" OR "${HAVE_BE64TOH_FUNC}")
set(HAVE_BE64TOH 1)
endif()
if (NOT "${HAVE_BE64TOH}")
if (NOT "${CMAKE_CROSSCOMPILING}")
# It is safe to make ORDER_BIG_ENDIAN not defined if
# - HAVE_BE64TOH is true. In this case be64toh will be used unconditionally in
# any case and ORDER_BIG_ENDIAN will not be examined.
# - CMAKE_CROSSCOMPILING *and* HAVE_BE64TOH are both false. In this case
# be64toh function which uses cycle and arithmetic operations is used which
# will work regardless of endianness. Function is sub-optimal though.
check_c_source_runs("
${SI}
${MS}
char *s = (char *) &i;
return (
s[0] == 0x01
&& s[1] == 0x02
&& s[2] == 0x03
&& s[3] == 0x04
&& s[4] == 0x05
&& s[5] == 0x06
&& s[6] == 0x07
&& s[7] == 0x08) ? 0 : 1;
${ME}"
ORDER_BIG_ENDIAN)
endif()
endif()
# generate configuration header and update include directories
configure_file (
"${PROJECT_SOURCE_DIR}/cmake.config/config.h.in"
"${PROJECT_BINARY_DIR}/cmake.config/auto/config.h"
)
# generate version definitions
configure_file (
"${PROJECT_SOURCE_DIR}/cmake.config/versiondef.h.in"
"${PROJECT_BINARY_DIR}/cmake.config/auto/versiondef.h"
)
# generate pathdef.c
find_program(WHOAMI_PROG whoami)
find_program(HOSTNAME_PROG hostname)
if (DEFINED ENV{USERNAME})
set(USERNAME $ENV{USERNAME})
elseif (NOT DEFINED USERNAME AND EXISTS ${WHOAMI_PROG})
execute_process(COMMAND ${WHOAMI_PROG}
OUTPUT_STRIP_TRAILING_WHITESPACE
OUTPUT_VARIABLE USERNAME)
endif()
if (DEFINED ENV{HOSTNAME})
set(HOSTNAME $ENV{HOSTNAME})
elseif (EXISTS ${HOSTNAME_PROG})
execute_process(COMMAND ${HOSTNAME_PROG}
OUTPUT_STRIP_TRAILING_WHITESPACE
OUTPUT_VARIABLE HOSTNAME)
endif()
configure_file (
"${PROJECT_SOURCE_DIR}/cmake.config/pathdef.c.in"
"${PROJECT_BINARY_DIR}/cmake.config/auto/pathdef.c"
ESCAPE_QUOTES)
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