[v3] 11612

[Alexandre Oliva]

On Dec 10, 2003, Benjamin Kosnik <bkoz@redhat.com> wrote:

> Ok, this is very weak. How does one find the toplevel gcc build
> directory, or more precisely the directory with libgcc?

If GCC/libgcc are known to be in the build tree, I believe this works:

$(CC) -print-libgcc-file-name | sed 's,/[^/]*$,,'

If CC could point to a gcc install tree, then I can't think of any
simple solution.

Ideally, you shouldn't encode a directory within the build tree into a
library or program that's going to be installed, but this is not the
case of testsuite, so it's fine.  You might want to consider using -R
instead of the not-as-portable LD_RUN_PATH, though; libtool supports
-R portably, and produces the desired effect.

Except for executables or libraries created for installing (again, not
your case).  For those, the only way to tell libtool to encode the
build-time run paths into the build-tree executables/libraries, but
not in the install-tree ones, is to have the dependency library be a
libtool library.

-- 
Alexandre Oliva   Enjoy Guarana', see http://www.ic.unicamp.br/~oliva/
Red Hat GCC Developer                 aoliva@{redhat.com, gcc.gnu.org}
CS PhD student at IC-Unicamp        oliva@{lsd.ic.unicamp.br, gnu.org}
Free Software Evangelist                Professional serial bug killer