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Date: Tue, 16 Sep 1997 14:17:56 -0400 (EDT)
From: Matthew Hunt <mph@pobox.com>
To: FreeBSD-gnats-submit@FreeBSD.ORG
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Subject: misc/4556: make can't build executable from single Fortran source
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>Number:         4556
>Category:       misc
>Synopsis:       make can't build executable from single Fortran source
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Tue Sep 16 11:20:02 PDT 1997
>Last-Modified:
>Originator:     Matthew Hunt
>Organization:
none
>Release:        FreeBSD 2.2-STABLE i386
>Environment:

FreeBSD mph124.rh.psu.edu 2.2-STABLE FreeBSD 2.2-STABLE #0: Thu Sep 11 20:08:28 EDT 1997     hunt@mph124.rh.psu.edu:/usr/src/sys/compile/WOPR  i386

#       $Id: sys.mk,v 1.16.2.3 1997/04/20 20:16:13 jkh Exp $

>Description:

As the legions reported unnecessarily to jkh, some people write Fortran
on FreeBSD.  It seems that make knows how to build foo.o from foo.f, but
cannot build foo from foo.f.  Contrast this behavior with C code; make can
build a single C source file into a binary.

>How-To-Repeat:

I have a simple Fortran program contained in prob1.f.  No Makefile is
present in the current directory.

mph124:~/tmp$ ls -l prob1* 
-rw-r--r--  1 hunt  users  132 Sep 16 14:06 prob1.f

mph124:~/tmp$ make prob1
make: don't know how to make prob1. Stop

mph124:~/tmp$ make prob1.o
f77   -O -c prob1.f
prob1.f:
   MAIN:

>Fix:
	
As far as I can tell, it should work!  /usr/share/mk/sys.mk has these
two rules:

.f:
        ${FC} ${FFLAGS} ${LDFLAGS} -o ${.TARGET} ${.IMPSRC}

[...]

.f.o:
        ${FC} ${FFLAGS} -c ${.IMPSRC}


I cannot figure out why the second one works, but the first does not.
>Audit-Trail:
>Unformatted: