objs-gcc.sh: Only bootstrap if source-directory contains gcc

I use objs-gcc.sh as a preparatory step before calling
btest-gcc.sh in my scripts, for example my cris-elf
autotester.  I thought, why not use it for native builds
too.  Except that use, with binutils release-style tarballs
and a x86_64-pc-linux-gnu host, was broken.  Now that I look
at it, the script seems to have aged poorly...  Still,
there's a need for such a script to install stuff needed for
btest-gcc.sh (and to fix up stuff if needed), and this can
still be that script.  So, I prefer to fix show-stoppers for
common uses, while taking care to retain compatibility for
use that could possibly still work, with current sources.

A long time ago (before 2011, but after this script was
created in 2002, and used for a few years), the binutils
(and gdb and gcc) toplevel Makefile may have had a bootstrap
target that worked with binutils but didn't require gcc
sources to be present.  Now, you'll get an error (see
configure.ac line 1366 and on).  Let's just build the
default make-target when "bootstrap" is known to fail.
An alternative would be to fold this native
non-i686-pc-linux-gnu clause into the native
i686-pc-linux-gnu clause, as that seems to have been
originally intended as *the* single native clause, but
that'd require further edits (e.g. to remove install-dejagnu
and make gdb build conditional on gdb sources presence, to
work with binutils tarballs, and I'd also then prefer to
build not just ld, but also gas and binutils).

As it's a minimal obvious change required for current native
use with release-tarballs and git-checkout use(*), I'm
installing this as obvious.

*) Native i686-pc-linux-gnu remains broken for other use
than specially constructed combined trees where dejagnu is
included at the toplevel (i.e. historic Cygnus devo-type).

contrib/regression:
	* objs-gcc.sh: Only bootstrap if source-directory contains gcc.

1 files changed, 3 insertions, 1 deletions

diff --git a/contrib/regression/objs-gcc.sh b/contrib/regression/objs-gcc.sh
index ea7820f33fa..d205bab1736 100755
--- a/contrib/regression/objs-gcc.sh
+++ b/contrib/regression/objs-gcc.sh
@@ -106,7 +106,9 @@ if [ $H_REAL_TARGET = $H_REAL_HOST -a $H_REAL_TARGET = i686-pc-linux-gnu ]
   make all-gdb all-dejagnu all-ld || exit 1
   make install-gdb install-dejagnu install-ld || exit 1
 elif [ $H_REAL_TARGET = $H_REAL_HOST ] ; then
-  make bootstrap || exit 1
+  H_MAKE_TARGET=
+  test -f $SOURCE/gcc/configure && H_MAKE_TARGET=bootstrap
+  make $H_MAKE_TARGET || exit 1
   make install || exit 1
 else
   make || exit 1