[uLib Geometry]

non working version!

+ adds ProgrammableAccessor
+ renaming of some Image structures ...

m4/openmp.m4

@@ -0,0 +1,98 @@
+# openmp.m4 serial 7
+dnl Copyright (C) 2006-2010 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl This file can be removed once we assume autoconf >= 2.62.
+
+dnl Expand to nothing in autoconf >= 2.62. m4_copy has a different
+dnl semantic in autoconf > 2.63.
+m4_ifdef([AC_OPENMP], [], [
+
+# _AC_LANG_OPENMP
+# ---------------
+# Expands to some language dependent source code for testing the presence of
+# OpenMP.
+AC_DEFUN([_AC_LANG_OPENMP],
+[_AC_LANG_DISPATCH([$0], _AC_LANG, $@)])
+
+# _AC_LANG_OPENMP(C)
+# ------------------
+m4_define([_AC_LANG_OPENMP(C)],
+[
+#ifndef _OPENMP
+ choke me
+#endif
+#include <omp.h>
+int main () { return omp_get_num_threads (); }
+])
+
+# _AC_LANG_OPENMP(C++)
+# --------------------
+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])])
+
+# _AC_LANG_OPENMP(Fortran)
+# ---------------------------
+m4_copy([_AC_LANG_OPENMP(Fortran 77)], [_AC_LANG_OPENMP(Fortran)])
+
+# AC_OPENMP
+# ---------
+# Check which options need to be passed to the C compiler to support OpenMP.
+# Set the OPENMP_CFLAGS / OPENMP_CXXFLAGS / OPENMP_FFLAGS variable to these
+# options.
+# The options are necessary at compile time (so the #pragmas are understood)
+# and at link time (so the appropriate library is linked with).
+# This macro takes care to not produce redundant options if $CC $CFLAGS already
+# supports OpenMP. It also is careful to not pass options to compilers that
+# misinterpret them; for example, most compilers accept "-openmp" and create
+# an output file called 'penmp' rather than activating OpenMP support.
+AC_DEFUN([AC_OPENMP],
+[
+  OPENMP_[]_AC_LANG_PREFIX[]FLAGS=
+  AC_ARG_ENABLE([openmp],
+    [AS_HELP_STRING([--disable-openmp], [do not use OpenMP])])
+  if test "$enable_openmp" != no; then
+    AC_CACHE_CHECK([for $CC option to support OpenMP],
+      [ac_cv_prog_[]_AC_LANG_ABBREV[]_openmp],
+      [AC_LINK_IFELSE([_AC_LANG_OPENMP],
+         [ac_cv_prog_[]_AC_LANG_ABBREV[]_openmp='none needed'],
+         [ac_cv_prog_[]_AC_LANG_ABBREV[]_openmp='unsupported'
+          dnl Try these flags:
+          dnl   GCC >= 4.2           -fopenmp
+          dnl   SunPRO C             -xopenmp
+          dnl   Intel C              -openmp
+          dnl   SGI C, PGI C         -mp
+          dnl   Tru64 Compaq C       -omp
+          dnl   IBM C (AIX, Linux)   -qsmp=omp
+          dnl If in this loop a compiler is passed an option that it doesn't
+          dnl understand or that it misinterprets, the AC_LINK_IFELSE test
+          dnl will fail (since we know that it failed without the option),
+          dnl therefore the loop will continue searching for an option, and
+          dnl no output file called 'penmp' or 'mp' is created.
+          for ac_option in -fopenmp -xopenmp -openmp -mp -omp -qsmp=omp; do
+            ac_save_[]_AC_LANG_PREFIX[]FLAGS=$[]_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])])
+    case $ac_cv_prog_[]_AC_LANG_ABBREV[]_openmp in #(
+      "none needed" | unsupported)
+        ;; #(
+      *)
+        OPENMP_[]_AC_LANG_PREFIX[]FLAGS=$ac_cv_prog_[]_AC_LANG_ABBREV[]_openmp ;;
+    esac
+  fi
+  AC_SUBST([OPENMP_]_AC_LANG_PREFIX[FLAGS])
+])
+
+])