isl.m4: New file.

2012-07-02  Richard Guenther  <rguenther@suse.de>
	Michael Matz  <matz@suse.de>
	Tobias Grosser <tobias@grosser.es>
	Sebastian Pop <sebpop@gmail.com>

	* isl.m4: New file.

From-SVN: r189157

config/isl.m4

+# This file is part of GCC.
+#
+# GCC is free software; you can redistribute it and/or modify it under
+# the terms of the GNU General Public License as published by the Free
+# Software Foundation; either version 3, or (at your option) any later
+# version.
+#
+# GCC is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+# for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with GCC; see the file COPYING3.  If not see
+# <http://www.gnu.org/licenses/>.
+#
+# Contributed by Richard Guenther <rguenther@suse.de>
+# Based on cloog.m4
+
+# ISL_INIT_FLAGS ()
+# -------------------------
+# Provide configure switches for ISL support.
+# Initialize isllibs/islinc according to the user input.
+AC_DEFUN([ISL_INIT_FLAGS],
+[
+  AC_ARG_WITH(isl,
+    [AS_HELP_STRING(
+      [--with-isl=PATH],
+      [Specify prefix directory for the installed ISL package.
+       Equivalent to --with-isl-include=PATH/include
+       plus --with-isl-lib=PATH/lib])])
+  AC_ARG_WITH([isl-include],
+    [AS_HELP_STRING(
+      [--with-isl-include=PATH],
+      [Specify directory for installed ISL include files])])
+  AC_ARG_WITH([isl-lib],
+    [AS_HELP_STRING(
+      [--with-isl-lib=PATH],
+      [Specify the directory for the installed ISL library])])
+
+  AC_ARG_ENABLE(isl-version-check,
+    [AS_HELP_STRING(
+      [--disable-isl-version-check],
+      [disable check for ISL version])],
+    ENABLE_ISL_CHECK=$enableval,
+    ENABLE_ISL_CHECK=yes)
+  
+  # Initialize isllibs and islinc.
+  case $with_isl in
+    no)
+      isllibs=
+      islinc=
+      ;;
+    "" | yes)
+      ;;
+    *)
+      isllibs="-L$with_isl/lib"
+      islinc="-I$with_isl/include"
+      ;;
+  esac
+  if test "x${with_isl_include}" != x ; then
+    islinc="-I$with_isl_include"
+  fi
+  if test "x${with_isl_lib}" != x; then
+    isllibs="-L$with_isl_lib"
+  fi
+  dnl If no --with-isl flag was specified and there is in-tree ISL
+  dnl source, set up flags to use that and skip any version tests
+  dnl as we cannot run them before building ISL.
+  if test "x${islinc}" = x && test "x${isllibs}" = x \
+     && test -d ${srcdir}/isl; then
+    isllibs='-L$$r/$(HOST_SUBDIR)/isl/'"$lt_cv_objdir"' '
+    islinc='-I$$r/$(HOST_SUBDIR)/isl/include -I$$s/isl/include'
+    ENABLE_ISL_CHECK=no
+  fi
+
+  isllibs="${isllibs} -lisl"
+
+  dnl Flags needed for ISL
+  AC_SUBST(isllibs)
+  AC_SUBST(islinc)
+]
+)
+
+# ISL_REQUESTED (ACTION-IF-REQUESTED, ACTION-IF-NOT)
+# ----------------------------------------------------
+# Provide actions for failed CLooG detection.
+AC_DEFUN([ISL_REQUESTED],
+[
+  AC_REQUIRE([ISL_INIT_FLAGS])
+
+  if test "x${with_isl}" = xno; then
+    $2
+  elif test "x${with_isl}" != x \
+    || test "x${with_isl_include}" != x \
+    || test "x${with_isl_lib}" != x ; then
+    $1
+  else
+    $2
+  fi
+]
+)
+
+# _ISL_CHECK_CT_PROG(MAJOR, MINOR)
+# --------------------------------------------
+# Helper for verifying CLooG's compile time version.
+m4_define([_ISL_CHECK_CT_PROG],[AC_LANG_PROGRAM(
+  [#include <isl/version.h>
+   #include <string.h>],
+  [int main()
+   {
+     if (strncmp (isl_version (), "isl-0.10", strlen ("isl-$1.$2")) != 0)
+       return 1;
+     return 0;
+   }])])
+
+# ISL_CHECK_VERSION ISL_CHECK_VERSION (MAJOR, MINOR)
+# ----------------------------------------------------------------
+# Test the found ISL to be exact of version MAJOR.MINOR and at least
+# REVISION.
+AC_DEFUN([ISL_CHECK_VERSION],
+[
+  if test "${ENABLE_ISL_CHECK}" = yes ; then
+    _isl_saved_CFLAGS=$CFLAGS
+    _isl_saved_LDFLAGS=$LDFLAGS
+
+    CFLAGS="${_isl_saved_CFLAGS} ${islinc} ${gmpinc}"
+    LDFLAGS="${_isl_saved_LDFLAGS} ${isllibs} -lisl"
+    echo $CFLAGS
+
+    AC_CACHE_CHECK([for version $1.$2 of ISL],
+      [gcc_cv_isl],
+      [AC_RUN_IFELSE([_ISL_CHECK_CT_PROG($1,$2)],
+	[gcc_cv_isl=yes],
+	[gcc_cv_isl=no])])
+
+    CFLAGS=$_isl_saved_CFLAGS
+    LDFLAGS=$_isl_saved_LDFLAGS
+  fi
+]
+)
+
+# ISL_IF_FAILED (ACTION-IF-FAILED)
+# ----------------------------------
+# Executes ACTION-IF-FAILED, if GRAPHITE was requested and
+# the checks failed.
+AC_DEFUN([ISL_IF_FAILED],
+[
+  ISL_REQUESTED([graphite_requested=yes], [graphite_requested=no])
+  
+  if test "${gcc_cv_isl}" = no ; then
+    isllibs=
+    islinc=
+  fi
+
+  if test "${graphite_requested}" = yes \
+    && test "x${isllibs}" = x \
+    && test "x${islinc}" = x ; then
+    $1
+  fi
+]
+)