Do not build gcc if only a fortran compiler is missing. More care abo…

…ut check logic. Don't restrict to gfortran.

build/pkgs/gfortran/spkg-configure.m4

@@ -14,20 +14,17 @@ SAGE_SPKG_CONFIGURE([gfortran], [
         # compiler.
         if test -z "$FC"; then
             sage_spkg_install_gfortran=yes
-            SAGE_MUST_INSTALL_GCC([a Fortran compiler is missing])
-        fi
-
+            AC_MSG_NOTICE([A Fortran compiler couldn't be found])
+            AC_MSG_NOTICE([gfortran will be built])
+        else
         # see http://www.gnu.org/software/hello/manual/autoconf/Fortran-Compiler.html
-        AC_FC_FREEFORM([], [
-            AC_MSG_NOTICE([Your Fortran compiler does not accept free-format source code])
-            AC_MSG_NOTICE([which means the compiler is either seriously broken, or])
-            AC_MSG_NOTICE([is too old to build Sage.])
-            sage_spkg_install_gfortran=yes
-        ])
-
-        # Check compiler versions
-        if test x$GFC != xyes; then
-            sage_spkg_install_gfortran=yes
+            AC_FC_FREEFORM([], [
+		AC_MSG_NOTICE([Your Fortran compiler does not accept free-format source code])
+                AC_MSG_NOTICE([which means the compiler is either seriously broken, or])
+                AC_MSG_NOTICE([is too old to build Sage.])
+                AC_MSG_NOTICE([gfortran will be built])
+                sage_spkg_install_gfortran=yes
+            ])
         fi
     fi
 ])