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dnl #
dnl # check if were compiling with CLANG, autoconf GCC macro identifies CLANG as GCC
dnl #
AC_DEFUN([AX_CC_IS_CLANG],[
AC_CACHE_CHECK([if compiler is clang], [ax_cv_cc_clang],[
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([], [[
#ifndef __clang__
not clang
#endif
]])],
[ax_cv_cc_clang=yes],
[ax_cv_cc_clang=no])
])
])
AC_DEFUN([AX_CC_QUNUSED_ARGUMENTS_FLAG],[
AC_CACHE_CHECK([for the compiler flag "-Qunused-arguments"], [ax_cv_cc_qunused_arguments_flag],[
CFLAGS_SAVED=$CFLAGS
CFLAGS="$CFLAGS -Werror -Qunused-arguments -foobar"
AC_LANG_PUSH(C)
AC_TRY_COMPILE(
[],
[return 0;],
[ax_cv_cc_qunused_arguments_flag="yes"],
[ax_cv_cc_qunused_arguments_flag="no"])
AC_LANG_POP
CFLAGS="$CFLAGS_SAVED"
])
])
AC_DEFUN([AX_CC_WDOCUMENTATION_FLAG],[
AC_CACHE_CHECK([for the compiler flag "-Wdocumentation"], [ax_cv_cc_wdocumentation_flag],[
CFLAGS_SAVED=$CFLAGS
CFLAGS="$CFLAGS -Werror -Wdocumentation"
AC_LANG_PUSH(C)
AC_TRY_COMPILE(
[],
[return 0;],
[ax_cv_cc_wdocumentation_flag="yes"],
[ax_cv_cc_wdocumentation_flag="no"])
AC_LANG_POP
CFLAGS="$CFLAGS_SAVED"
])
])
dnl #
dnl # Determine the number of system cores we have
dnl #
AC_DEFUN([AX_SYSTEM_CORES],[
AC_CACHE_CHECK([number of system cores], [ax_cv_system_cores],
[
AC_LANG_PUSH(C)
AC_TRY_RUN(
[
#include <stdio.h>
#include <stdint.h>
#ifdef _WIN32
# include <windows.h>
#elif MACOS
# include <sys/param.h>
# include <sys/sysctl.h>
#else
# include <unistd.h>
#endif
int main (int argc, char *argv[])
{
uint32_t count;
#ifdef WIN32
SYSTEM_INFO sysinfo;
GetSystemInfo(&sysinfo);
count = sysinfo.dwNumberOfProcessors;
#elif MACOS
int nm[2];
size_t len = 4;
nm[0] = CTL_HW;
nm[1] = HW_AVAILCPU;
sysctl(nm, 2, &count, &len, NULL, 0);
if(count < 1) {
nm[1] = HW_NCPU;
sysctl(nm, 2, &count, &len, NULL, 0);
if(count < 1) {
count = 1;
}
}
#else
count = sysconf(_SC_NPROCESSORS_ONLN);
#endif
return count;
}
],
[ax_cv_system_cores=$?],
[ax_cv_system_cores=$?],
[ax_cv_system_cores=]
)
AC_LANG_POP
])
])
|
