Re: [patch] boehm-gc removal and libobjc changes to build with an external bdw-gc

[Jakub Jelinek <jakub@redhat.com>]

On Wed, Nov 30, 2016 at 11:17:32AM +0100, Richard Biener wrote:
> On Wed, Nov 30, 2016 at 11:06 AM, Matthias Klose <doko@ubuntu.com> wrote:
> > On 30.11.2016 09:29, Andreas Schwab wrote:
> >> configure: error: no --with-target-bdw-gc options and no bdw-gc pkg-config module found
> >> make[1]: *** [Makefile:19775: configure-target-libobjc] Error 1
> >>
> >> Andreas.
> >
> > that's a bit terse. Could you send the complete output for the configuration of
> > the libobjc subdir and the config.log?
> >
> > I assume that is a configuration with --enable-objc-gc and then the pkg-config
> > module cannot be found.  Are gc/gc.h and libgc.so in standard paths without
> > having the bdw-gc pkg-config module available? Which libgc version is installed?
> 
> I see the same failure with just
> 
>  ../configure --enable-languages=objc
> 
> usually we disable languages (with a diagnostic) if requirements
> cannot be fulfilled.
> 
> But it seems the default chosen is bad somehow... (and breaks my bootstraps with
> default languages).

I'm now testing the default (no --enable-objc-gc, --enable-objc-gc=*,
--disable-objc-gc) with.  Ok for trunk if it succeeds?

2016-11-30  Jakub Jelinek  <jakub@redhat.com>

	* configure.ac (--enable-objc-gc): If not given, default to
	enable_objc_gc=no.
	* configure: Regenerated.

--- libobjc/configure.ac.jj	2016-11-30 08:57:26.000000000 +0100
+++ libobjc/configure.ac	2016-11-30 11:47:33.085828683 +0100
@@ -203,7 +203,7 @@ gt_BITFIELD_TYPE_MATTERS
 AC_ARG_ENABLE(objc-gc,
 [AS_HELP_STRING([--enable-objc-gc],
 		[enable use of Boehm's garbage collector with the
-		 GNU Objective-C runtime])])
+		 GNU Objective-C runtime])],,enable_objc_gc=no)
 AC_ARG_WITH([target-bdw-gc],
 [AS_HELP_STRING([--with-target-bdw-gc=PATHLIST],
 		[specify prefix directory for installed bdw-gc package.
--- libobjc/configure.jj	2016-11-30 08:57:26.000000000 +0100
+++ libobjc/configure	2016-11-30 11:47:44.720680375 +0100
@@ -11509,6 +11509,8 @@ $as_echo "#define HAVE_BITFIELD_TYPE_MAT
 # Check whether --enable-objc-gc was given.
 if test "${enable_objc_gc+set}" = set; then :
   enableval=$enable_objc_gc;
+else
+  enable_objc_gc=no
 fi
 
 
	Jakub