libgd
/
libgd
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

m4: use an older openmp macro 

The newer one requires autoconf-2.69 but that version isn't available
in Ubuntu Precise which is what the Travis CI bots run.
master
Mike Frysinger 2016-05-18 19:30:34 -04:00
parent e6bf7714d7
commit f79d0a8bac
1 changed files with 12 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

34
m4/ax_openmp.m4
View File

@ -38,7 +38,6 @@
# LICENSE
#
# Copyright (c) 2008 Steven G. Johnson <stevenj@alum.mit.edu>
# Copyright (c) 2015 John W. Peterson <jwpeterson@gmail.com>
#
# This program is free software: you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by the
@ -66,10 +65,10 @@
# modified version of the Autoconf Macro, you may extend this special
# exception to the GPL to apply to your modified version as well.
#serial 11
#serial 9
AC_DEFUN([AX_OPENMP], [
AC_PREREQ([2.69]) dnl for _AC_LANG_PREFIX
AC_PREREQ(2.59) dnl for _AC_LANG_PREFIX
AC_CACHE_CHECK([for OpenMP flag of _AC_LANG compiler], ax_cv_[]_AC_LANG_ABBREV[]_openmp, [save[]_AC_LANG_PREFIX[]FLAGS=$[]_AC_LANG_PREFIX[]FLAGS
ax_cv_[]_AC_LANG_ABBREV[]_openmp=unknown
@ -84,27 +83,18 @@ for ax_openmp_flag in $ax_openmp_flags; do
none) []_AC_LANG_PREFIX[]FLAGS=$save[]_AC_LANG_PREFIX[] ;;
*) []_AC_LANG_PREFIX[]FLAGS="$save[]_AC_LANG_PREFIX[]FLAGS $ax_openmp_flag" ;;
esac
AC_LINK_IFELSE([AC_LANG_SOURCE([[
@%:@include <omp.h>
AC_TRY_LINK([#ifdef __cplusplus
extern "C"
#endif
void omp_set_num_threads(int);], [const int N = 100000;
int i, arr[N];
static void
parallel_fill(int * data, int n)
{
int i;
@%:@pragma omp parallel for
for (i = 0; i < n; ++i)
data[i] = i;
}
int
main()
{
int arr[100000];
omp_set_num_threads(2);
parallel_fill(arr, 100000);
return 0;
}
]])],[ax_cv_[]_AC_LANG_ABBREV[]_openmp=$ax_openmp_flag; break],[])
#pragma omp parallel for
for (i = 0; i < N; i++) {
arr[i] = i;
}], [ax_cv_[]_AC_LANG_ABBREV[]_openmp=$ax_openmp_flag; break])
done
[]_AC_LANG_PREFIX[]FLAGS=$save[]_AC_LANG_PREFIX[]FLAGS
])