Fix `make dist' on systems with no F9x compiler

[Noah Misch]

`make dist' needs every test demo directory configured.  If the system has no
F90 compiler, tests/fcdemo/configure always fails.  This patch adds an option to
that configure script that suppresses the potentially fatal check.  We then use
the option when configuring a test demo directory for the sake of `make dist'.

2007-05-03  Noah Misch  <address@hidden>

        * tests/fcdemo/configure.ac <dist>: New option.  Skip call to
        AC_FC_SRCEXT when specified.
        * Makefile.am (@DIST_MAKEFILE_LIST@): Pass --with-dist.

diff -urpX dontdiff lt-bootstrap/Makefile.am lt-fcdist/Makefile.am
--- lt-bootstrap/Makefile.am    2007-04-24 16:46:17.000000000 -0400
+++ lt-fcdist/Makefile.am       2007-05-03 21:12:29.000000000 -0400
@@ -106,7 +106,7 @@ configure-subdirs distdir: $(DIST_MAKEFI
        dir=`echo $@ | sed 's,^[^/]*$$,.,;s,/[^/]*$$,,'`; \
        test -d $$dir || mkdir $$dir || exit 1; \
        abs_srcdir=`$(lt__cd) $(srcdir) && pwd`; \
-       (cd $$dir && $$abs_srcdir/$$dir/configure) || exit 1
+       (cd $$dir && $$abs_srcdir/$$dir/configure --with-dist) || exit 1
 
 
 # ---------- #
diff -urpX dontdiff lt-bootstrap/tests/fcdemo/configure.ac 
lt-fcdist/tests/fcdemo/configure.ac
--- lt-bootstrap/tests/fcdemo/configure.ac      2007-03-25 07:12:43.000000000 
-0500
+++ lt-fcdist/tests/fcdemo/configure.ac 2007-05-03 21:14:10.000000000 -0400
@@ -31,6 +31,9 @@ AC_CONFIG_HEADERS([config.h:config-h.in]
 AC_CONFIG_SRCDIR([foof.f90])
 AC_CONFIG_AUX_DIR([../../libltdl/config])
 
+AC_ARG_WITH([dist], AS_HELP_STRING([--with-dist],
+                                  [ignore errors not affecting `make dist']))
+
 ## ------------------------ ##
 ## Automake Initialisation. ##
 ## ------------------------ ##
@@ -53,7 +56,11 @@ dnl Check for underscoring of external n
 AC_FC_WRAPPERS
 dnl We need to use .f90 and not .f to enable Automake FC support
 dnl Some Intel ifc/ifort do not understand .f95.  :-/
-AC_FC_SRCEXT([f90])
+dnl When configuring for `make dist' purposes, skip this check, as it yields a
+dnl fatal error when there is no working F90 compiler.
+if test -z "$with_dist"; then
+  AC_FC_SRCEXT([f90])
+fi
 dnl Yes, we want free form Fortran!
 AC_FC_FREEFORM
 AC_LANG_POP