[patch, libgfortran] Fix m4 file generation

[FX Coudert]

:REVIEWMAIL:

>> m4 -Dfile=generated/_abs_c4.F90 -I../../../../trunk2/libgfortran/ 
>> m4 specific.m4 > generated/_abs_c4.F90
>> /bin/sh: generated/_abs_c4.F90: No such file or directory
>
> This is exceedingly strange.  My patch didn't touch that particular
> line in Makefile.am, precicely because I got that error when I
> removed $(srcdir).

OK, I understand; I made a mistake yesterday when applying your patch.

So, your patch is OK, although I would have liked better to  
understand why we need to special-case the specific* files. Also,  
could you add the following patch before you commit:

Index: Makefile.am
===================================================================
--- Makefile.am (revision 121680)
+++ Makefile.am (working copy)
@@ -723,7 +723,7 @@
         $(M4) -Dfile=$@ -I$(srcdir)/m4 specific2.m4 > $(srcdir)/$@
$(gfor_misc_specifics): m4/misc_specifics.m4 m4/head.m4
-       m4 -Dfile=$@ -I$(srcdir)/m4 misc_specifics.m4 > $(srcdir)/$@
+       $(M4) -Dfile=$@ -I$(srcdir)/m4 misc_specifics.m4 > $(srcdir)/$@
## end of maintainer mode only rules
endif


> Did the version before the patch work for you?

No.


Thanks,
FX