FreeBSD 3.x requires change in mpi/config.links

David Pick D.M.Pick at
Mon Mar 8 12:20:27 CET 1999

> I just upgraded to FreeBSD 3.1, and GnuPG 0.9.3 won't compile "as is"
> any more.
> The problem appears to be that FreeBSD 3.x doesn't use underscore (_)
> characters on external symbols -- but the "mpi/config.links" script
> doesn't recognize the target (i386-unknown-freebsd3.1) and tries to
> prepend underscores to the external symbols used by the assembly
> language routines in the MPI library.
> The following patch appears to fix the problem:
> --- mpi/config.links.orig	Mon Jan 11 00:55:21 1999
> +++ mpi/config.links	Sat Mar  6 13:52:54 1999
> @@ -170,11 +170,11 @@
>  case "${target}" in
>      *-*-linuxaout* | *-*-linuxoldld* | *-*-linux-gnuoldld*)
>  	needs_underscore="y"
>  	;;
> -    *-*-linux* | *-sysv* | *-solaris* | *-gnu* | *-freebsd*-elf)
> +    *-*-linux* | *-sysv* | *-solaris* | *-gnu* | *-freebsd*-elf | *-freebsd3*)
>  	needs_underscore="n"
>  	;;
>      *)
>  	needs_underscore="y"
>  	;;
> Even though FreeBSD 3.x uses the ELF binary format by default, the
> $target value does NOT have "-elf" in it.

I'm not sure about FreeBSD 3.1, but FreeBSD 3.0 can be switched between
using ELF and "a.out" format for compiler output, and understands
both formats for loadable programs. I attach a copy of an appropriate
manual page from FreeBSD 3.0 which may help: the command "/usr/bin/objformat"
just calls this routine and "prints" the output value to the standard output.

GETOBJFORMAT(3)        FreeBSD Library Functions Manual        GETOBJFORMAT(3)

     getobjformat - get preferred object file format

     #include <objformat.h>

     getobjformat(char *buf, size_t bufsize, int *argcp, char **argv)

     getobjformat() queries several sources to determine the preferred object
     file format, and copies its name into a buffer provided by the caller.

     The object file format is determined as follows.  If argv is non-NULL and
     an explicit command line argument such as -aout or -elf is present, then
     that determines the object file format.

     Otherwise, if the variable OBJFORMAT is set in the environment, the ob-
     ject file format is taken from its value.

     Otherwise, if the file /etc/objformat is readable and contains a line of
     the form `OBJFORMAT=xxx', the object file format is taken from there.

     Otherwise, a built-in system default object file format is returned.

     buf points to a user-supplied buffer into which the name of the object
     file format is copied.  bufsize gives the size of the buffer in bytes.
     The string placed in buf is always null-terminated.  It is an error if
     the buffer is too small to hold the null-terminated name.

     argv points to a NULL-terminated argument vector to be scanned for object
     format options.  argv may be NULL, in which case the argument vector is
     not scanned.

     If argcp is non-NULL, any object format options are deleted from the ar-
     gument vector, and the updated argument count is stored into the integer
     referenced by argcp. If argcp is NULL, the argument vector is left un-

     On success, getobjformat() returns the length of the object file format
     name, not counting the null terminator.  If the supplied buffer is too
     small to hold the object file format and its null terminator,
     getobjformat() returns -1.  In that case, the contents of the buffer and
     argument vector supplied by the caller are indeterminate.




     The getobjformat() function first appeared in FreeBSD 3.0.

 FreeBSD		       September 7, 1998			     1

	David Pick

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