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-rw-r--r--m4/tuklib_cpucores.m431
1 files changed, 18 insertions, 13 deletions
diff --git a/m4/tuklib_cpucores.m4 b/m4/tuklib_cpucores.m4
index 9058d445..bb33c6f4 100644
--- a/m4/tuklib_cpucores.m4
+++ b/m4/tuklib_cpucores.m4
@@ -25,7 +25,8 @@ AC_REQUIRE([TUKLIB_COMMON])
# sys/param.h might be needed by sys/sysctl.h.
AC_CHECK_HEADERS([sys/param.h])
-AC_MSG_CHECKING([how to detect the number of available CPU cores])
+AC_CACHE_CHECK([how to detect the number of available CPU cores],
+ [tuklib_cv_cpucores_method], [
# Look for sysctl() solution first, because on OS/2, both sysconf()
# and sysctl() pass the tests in this file, but only sysctl()
@@ -45,12 +46,7 @@ main(void)
sysctl(name, 2, &cpus, &cpus_size, NULL, 0);
return 0;
}
-]])], [
- AC_DEFINE([TUKLIB_CPUCORES_SYSCTL], [1],
- [Define to 1 if the number of available CPU cores can be
- detected with sysctl().])
- AC_MSG_RESULT([sysctl])
-], [
+]])], [tuklib_cv_cpucores_method=sysctl], [
AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
#include <unistd.h>
@@ -62,11 +58,20 @@ main(void)
return 0;
}
]])], [
- AC_DEFINE([TUKLIB_CPUCORES_SYSCONF], [1],
- [Define to 1 if the number of available CPU cores can be
- detected with sysconf(_SC_NPROCESSORS_ONLN).])
- AC_MSG_RESULT([sysconf])
+ tuklib_cv_cpucores_method=sysconf
], [
- AC_MSG_RESULT([unknown])
-])])
+ tuklib_cv_cpucores_method=unknown
+])])])
+case $tuklib_cv_cpucores_method in
+ sysctl)
+ AC_DEFINE([TUKLIB_CPUCORES_SYSCTL], [1],
+ [Define to 1 if the number of available CPU cores
+ can be detected with sysctl().])
+ ;;
+ sysconf)
+ AC_DEFINE([TUKLIB_CPUCORES_SYSCONF], [1],
+ [Define to 1 if the number of available CPU cores
+ can be detected with sysconf(_SC_NPROCESSORS_ONLN).])
+ ;;
+esac
])dnl