[SCM] GNU Autoconf source repository branch, master, updated. v2.68-43-gce791e5

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- Log -----------------------------------------------------------------
commit ce791e5a957f3bb7787a804423482f9c708a698e
Author: Christian Rössel <[email protected]>
Date:   Sun Feb 20 18:24:23 2011 +0100

    Fix OpenMP flag detection for various Fortran compilers.
    
    * lib/autoconf/c.m4 (_AC_LANG_OPENMP(Fortran 77)): Use '!$'
    OpenMP-conditional compilation construct, to force compile
    failure with missing OpenMP flag.
    (AC_OPENMP): Add flags for Cray CCE and NEC SX compilers.
    * THANKS: Update.
    
    Signed-off-by: Ralf Wildenhues <[email protected]>

-----------------------------------------------------------------------

Summary of changes:
 ChangeLog         |   10 ++++++++++
 THANKS            |    1 +
 lib/autoconf/c.m4 |   13 +++++++++++--
 3 files changed, 22 insertions(+), 2 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 0bd0b78..52d4cac 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,13 @@
+2011-02-20  Christian Rössel  <[email protected]>  (tiny change)
+	    Markus Geimer  <[email protected]>  (tiny change)
+
+	Fix OpenMP flag detection for various Fortran compilers.
+	* lib/autoconf/c.m4 (_AC_LANG_OPENMP(Fortran 77)): Use '!$'
+	OpenMP-conditional compilation construct, to force compile
+	failure with missing OpenMP flag.
+	(AC_OPENMP): Add flags for Cray CCE and NEC SX compilers.
+	* THANKS: Update.
+
 2011-02-18  Eric Blake  <[email protected]>
 
 	docs: document fourth argument of AC_RUN_IFELSE better
diff --git a/THANKS b/THANKS
index a3ee752..d397327 100644
--- a/THANKS
+++ b/THANKS
@@ -257,6 +257,7 @@ Mark Hessling               [email protected]
 Mark Kettenis               [email protected]
 Markku Savela               [email protected]
 Markus Oberhumer            [email protected]
+Markus Geimer               [email protected]
 Martin Buchholz             [email protected]
 Martin Costabel             [email protected]
 Martin Frydl                [email protected]
diff --git a/lib/autoconf/c.m4 b/lib/autoconf/c.m4
index 871e1c9..89e6b49 100644
--- a/lib/autoconf/c.m4
+++ b/lib/autoconf/c.m4
@@ -1957,7 +1957,14 @@ m4_copy([_AC_LANG_OPENMP(C)], [_AC_LANG_OPENMP(C++)])
 # _AC_LANG_OPENMP(Fortran 77)
 # ---------------------------
 m4_define([_AC_LANG_OPENMP(Fortran 77)],
-[AC_LANG_FUNC_LINK_TRY([omp_get_num_threads])])
+[
+      program main
+      implicit none
+!$    integer tid
+      tid = 42
+      call omp_set_num_threads(2)
+      end
+])
 
 # _AC_LANG_OPENMP(Fortran)
 # ------------------------
@@ -1992,12 +1999,14 @@ AC_DEFUN([AC_OPENMP],
 	  dnl   SGI C, PGI C         -mp
 	  dnl   Tru64 Compaq C       -omp
 	  dnl   IBM C (AIX, Linux)   -qsmp=omp
+          dnl   Cray CCE             -homp
+          dnl   NEC SX               -Popenmp
 	  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
+	  for ac_option in -fopenmp -xopenmp -openmp -mp -omp -qsmp=omp -homp -Popenmp; 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],


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