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* lib/autoconf/c.m4 (AC_OPENMP): Use a simple loop instead of compiler

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brand tests.
This commit is contained in:
Noah Misch 2007-06-04 03:16:36 +00:00
parent f833ad61af
commit b336c6f28f
2 changed files with 18 additions and 43 deletions
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6
ChangeLog
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@ -1,3 +1,9 @@
2007-06-03 Noah Misch <noah@cs.caltech.edu>,
Bruno Haible <bruno@clisp.org>
* lib/autoconf/c.m4 (AC_OPENMP): Use a simple loop instead of compiler
brand tests.
2007-05-31 Paul Eggert <eggert@cs.ucla.edu>
* doc/autoconf.texi (Particular Types): Give example of use for

55
lib/autoconf/c.m4
View File

@ -1903,49 +1903,18 @@ AC_DEFUN([AC_OPENMP],
dnl SGI C, PGI C -mp
dnl Tru64 Compaq C -omp
dnl IBM C (AIX, Linux) -qsmp=omp
for ac_brand in GCC SunPRO Intel SGI/PGI Compaq IBM; do
case $ac_brand in #(
GCC)
ac_conditional='defined __GNUC__'
ac_option='-fopenmp' ;; #(
SunPRO)
ac_conditional='defined __SUNPRO_C || defined __SUNPRO_CC'
ac_option='-xopenmp' ;; #(
Intel)
ac_conditional='defined __INTEL_COMPILER'
ac_option='-openmp' ;; #(
SGI/PGI)
ac_conditional='defined __sgi || defined __PGI || defined __PGIC__'
ac_option='-mp' ;; #(
Compaq)
ac_conditional='defined __DECC || defined __DECCXX'
ac_option='-omp' ;; #(
IBM)
ac_conditional='defined __xlc__ || defined __xlC__'
ac_option='-qsmp=omp' ;;
esac
if test $ac_brand = GCC; then
if test "$ac_compiler_gnu" = yes; then
ac_openmp_result=yes
else
ac_openmp_result=no
fi
else
AC_EGREP_CPP([Brand],
[
#if $ac_conditional
Brand
#endif
],
[ac_openmp_result=yes],
[ac_openmp_result=no])
fi
if test $ac_openmp_result = yes; then
ac_save_[]_AC_LANG_PREFIX[]FLAGS=$[]_AC_LANG_PREFIX[]FLAGS
_AC_LANG_PREFIX[]FLAGS="$[]_AC_LANG_PREFIX[]FLAGS $ac_option"
AC_LINK_IFELSE([_AC_LANG_OPENMP],
[ac_cv_prog_[]_AC_LANG_ABBREV[]_openmp=$ac_option])
_AC_LANG_PREFIX[]FLAGS=$ac_save_[]_AC_LANG_PREFIX[]FLAGS
dnl If in this loop a compiler is passed an option that it doesn't
dnl understand or that it misinterprets, the AC_LINK_IFELSE test
dnl will fail (since we know that it failed without the option),
dnl therefore the loop will continue searching for an option, and
dnl no output file called 'penmp' or 'mp' is created.
for ac_option in -fopenmp -xopenmp -openmp -mp -omp -qsmp=omp; do
ac_save_[]_AC_LANG_PREFIX[]FLAGS=$[]_AC_LANG_PREFIX[]FLAGS
_AC_LANG_PREFIX[]FLAGS="$[]_AC_LANG_PREFIX[]FLAGS $ac_option"
AC_LINK_IFELSE([_AC_LANG_OPENMP],
[ac_cv_prog_[]_AC_LANG_ABBREV[]_openmp=$ac_option])
_AC_LANG_PREFIX[]FLAGS=$ac_save_[]_AC_LANG_PREFIX[]FLAGS
if test "$ac_cv_prog_[]_AC_LANG_ABBREV[]_openmp" != unsupported; then
break
fi
done])])