5 files changed, 97 insertions, 3 deletions
diff --git a/libgfortran/ChangeLog b/libgfortran/ChangeLog
index 5295968fc4b..bc303f30cd1 100644
--- a/libgfortran/ChangeLog
+++ b/libgfortran/ChangeLog
@@ -1,13 +1,23 @@
+2007-01-19  Francois-Xavier Coudert  <coudert@clipper.ens.fr>
+
+	PR libfortran/26893
+	* acinclude.m4 (LIBGFOR_WORKING_GFORTRAN): New check.
+	* configure.ac: Add call to LIBGFOR_WORKING_GFORTRAN.
+	* configure: Regenerate.
+	* config.h.in: Regenerate because it was forgottent in the last
+	commit.
+
 2007-01-18  Francois-Xavier Coudert  <coudert@clipper.ens.fr>
 	    Tobias Burnus  <burnus@net-b.de>
 
 	PR libfortran/29649
 	* runtime/environ.c (variable_table): New GFORTRAN_ERROR_DUMPCORE
-	  environment variable.
+	environment variable.
 	* runtime/compile_options.c (set_std): Add new argument.
-	* runtime/error.c (sys_exit): Move from io/unix.c. Add coredump functionality.
+	* runtime/error.c (sys_exit): Move from io/unix.c. Add coredump
+	functionality.
 	* libgfortran.h (options_t): New dump_core and backtrace members.
-	  (sys_exit): Move prototype.
+	(sys_exit): Move prototype.
 	* io/unix.c (sys_exit): Move to runtime/error.c.
 	* configure.ac: Add check for getrlimit.
 	* configure: Regenerate.
diff --git a/libgfortran/acinclude.m4 b/libgfortran/acinclude.m4
index 73d67e18784..3c849faca19 100644
--- a/libgfortran/acinclude.m4
+++ b/libgfortran/acinclude.m4
@@ -1,6 +1,22 @@
 m4_include(../config/acx.m4)
 m4_include(../config/no-executables.m4)
 
+dnl Check that we have a working GNU Fortran compiler
+AC_DEFUN([LIBGFOR_WORKING_GFORTRAN], [
+AC_MSG_CHECKING([whether the GNU Fortran compiler is working])
+AC_LANG_PUSH([Fortran])
+AC_COMPILE_IFELSE([[
+      program foo
+      real, parameter :: bar = sin (12.34 / 2.5)
+      end program foo]],
+    [AC_MSG_RESULT([yes])],
+    [AC_MSG_RESULT([no])
+     AC_MSG_ERROR([GNU Fortran is not working; please report a bug in http://gcc.gnu.org/bugzilla, attaching $PWD/config.log])
+    ])
+AC_LANG_POP([Fortran])
+])
+
+
 dnl Check:
 dnl * If we have gettimeofday;
 dnl * If we have struct timezone for use in calling it;
diff --git a/libgfortran/config.h.in b/libgfortran/config.h.in
index 11f7cc6db75..c67365fd20c 100644
--- a/libgfortran/config.h.in
+++ b/libgfortran/config.h.in
@@ -375,6 +375,9 @@
 /* libc includes getpid */
 #undef HAVE_GETPID
 
+/* Define to 1 if you have the `getrlimit' function. */
+#undef HAVE_GETRLIMIT
+
 /* Define to 1 if you have the `getrusage' function. */
 #undef HAVE_GETRUSAGE
 
diff --git a/libgfortran/configure b/libgfortran/configure
index 30b3eb29c7a..3b3ed6a039e 100755
--- a/libgfortran/configure
+++ b/libgfortran/configure
@@ -4896,6 +4896,67 @@ case "${host}" in
 esac
 
 
+# We need a working compiler at that point, otherwise give a clear
+# error message and bail out.
+
+
+echo "$as_me:$LINENO: checking whether the GNU Fortran compiler is working" >&5
+echo $ECHO_N "checking whether the GNU Fortran compiler is working... $ECHO_C" >&6
+ac_ext=${FC_SRCEXT-f}
+ac_compile='$FC -c $FCFLAGS $FCFLAGS_SRCEXT conftest.$ac_ext >&5'
+ac_link='$FC -o conftest$ac_exeext $FCFLAGS $LDFLAGS $FCFLAGS_SRCEXT conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_fc_compiler_gnu
+
+cat >conftest.$ac_ext <<_ACEOF
+
+      program foo
+      real, parameter :: bar = sin (12.34 / 2.5)
+      end program foo
+_ACEOF
+rm -f conftest.$ac_objext
+if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
+  (eval $ac_compile) 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+	 { ac_try='test -z "$ac_fc_werror_flag"
+			 || test ! -s conftest.err'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } &&
+	 { ac_try='test -s conftest.$ac_objext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  echo "$as_me:$LINENO: result: yes" >&5
+echo "${ECHO_T}yes" >&6
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+echo "$as_me:$LINENO: result: no" >&5
+echo "${ECHO_T}no" >&6
+     { { echo "$as_me:$LINENO: error: GNU Fortran is not working; please report a bug in http://gcc.gnu.org/bugzilla, attaching $PWD/config.log" >&5
+echo "$as_me: error: GNU Fortran is not working; please report a bug in http://gcc.gnu.org/bugzilla, attaching $PWD/config.log" >&2;}
+   { (exit 1); exit 1; }; }
+
+fi
+rm -f conftest.err conftest.$ac_objext conftest.$ac_ext
+ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+
+
 # Check whether --enable-largefile or --disable-largefile was given.
 if test "${enable_largefile+set}" = set; then
   enableval="$enable_largefile"
diff --git a/libgfortran/configure.ac b/libgfortran/configure.ac
index d97360f3275..802d5ad3e08 100644
--- a/libgfortran/configure.ac
+++ b/libgfortran/configure.ac
@@ -151,6 +151,10 @@ case "${host}" in
 esac
 AC_SUBST(extra_ldflags_libgfortran)
 
+# We need a working compiler at that point, otherwise give a clear
+# error message and bail out.
+LIBGFOR_WORKING_GFORTRAN
+
 AC_SYS_LARGEFILE
 AC_TYPE_OFF_T