diff options
Diffstat (limited to 'm4/tuklib_cpucores.m4')
| -rw-r--r-- | m4/tuklib_cpucores.m4 | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/m4/tuklib_cpucores.m4 b/m4/tuklib_cpucores.m4 index 9e295c8f..64a6b43c 100644 --- a/m4/tuklib_cpucores.m4 +++ b/m4/tuklib_cpucores.m4 @@ -9,8 +9,10 @@ # This information is used by tuklib_cpucores.c. # # Supported methods: +# - GetSystemInfo(): Windows (including Cygwin) # - sysctl(): BSDs, OS/2 -# - sysconf(): GNU/Linux, Solaris, Tru64, IRIX, AIX, Cygwin +# - sysconf(): GNU/Linux, Solaris, Tru64, IRIX, AIX, Cygwin (but +# GetSystemInfo() is used on Cygwin) # - pstat_getdynamic(): HP-UX # # COPYING @@ -30,6 +32,19 @@ AC_CHECK_HEADERS([sys/param.h]) AC_CACHE_CHECK([how to detect the number of available CPU cores], [tuklib_cv_cpucores_method], [ +# Maybe checking $host_os would be enough but this matches what +# tuklib_cpucores.c does. +# +# NOTE: IRIX has a compiler that doesn't error out with #error, so use +# a non-compilable text instead of #error to generate an error. +AC_COMPILE_IFELSE([AC_LANG_SOURCE([[ +#if defined(_WIN32) || defined(__CYGWIN__) +int main(void) { return 0; } +#else +compile error +#endif +]])], [tuklib_cv_cpucores_method=special], [ + # Look for sysctl() solution first, because on OS/2, both sysconf() # and sysctl() pass the tests in this file, but only sysctl() # actually works. @@ -82,7 +97,7 @@ main(void) ]])], [tuklib_cv_cpucores_method=pstat_getdynamic], [ tuklib_cv_cpucores_method=unknown -])])])]) +])])])])]) case $tuklib_cv_cpucores_method in sysctl) |