I recently tried to build with --enable-libobjc-gc. While this worked
out of the box on Solaris, I ran intro trouble on both Tru64 UNIX and
Darwin.
On Tru64 UNIX, one needs to compile with -pthread since the boehm-gc
headers include <pthread.h> which error out if -D_REENTRANT is missing.
On Darwin, the build stops with
make: *** No rule to make target `libobjc_gc.la', needed by `all'. Stop.
This can be fixed by taking $(libsuffix) into account in OBJC_BOEHM_GC.
The following patch fixes both issues. It was manually tested by fixing
the Makefile as below and successfully building libobjc_gc.la. Full
bootstraps on alpha-dec-osf5.1b and i386-apple-darwin9.8.0 are in
progress.
Ok for mainline if both pass?
Btw., it would be considerably easier if --enable-libobjc-gc could be
enabled automatically if boehm-gc is configured. Besides, it seems that
libobjc_gc isn't tested anywhere.
Rainer
2011-04-13 Rainer Orth <[email protected]>
* Makefile.in (OBJC_GCFLAGS): Move ...
* configure.ac (enable_objc_gc): ... here.
Add $(libsuffix) to OBJC_BOEHM_GC.
* configure: Regenerate.
diff --git a/libobjc/Makefile.in b/libobjc/Makefile.in
--- a/libobjc/Makefile.in
+++ b/libobjc/Makefile.in
@@ -93,7 +93,7 @@ LIBTOOL_INSTALL = $(LIBTOOL) --mode=inst
LIBTOOL_CLEAN = $(LIBTOOL) --mode=clean
#LIBTOOL_UNINSTALL = $(LIBTOOL) --mode=uninstall
-OBJC_GCFLAGS=-DOBJC_WITH_GC=1
+OBJC_GCFLAGS=@OBJC_GCFLAGS@
OBJC_BOEHM_GC=@OBJC_BOEHM_GC@
OBJC_BOEHM_GC_INCLUDES=@OBJC_BOEHM_GC_INCLUDES@
OBJC_BOEHM_GC_LIBS=../boehm-gc/libgcjgc_convenience.la $(thread_libs_and_flags)
diff --git a/libobjc/configure.ac b/libobjc/configure.ac
--- a/libobjc/configure.ac
+++ b/libobjc/configure.ac
@@ -1,6 +1,6 @@
# Process this file with autoconf to produce a configure script.
# Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2001, 2002, 2003, 2004
-# 2005, 2006, 2009 Free Software Foundation, Inc.
+# 2005, 2006, 2009, 2011 Free Software Foundation, Inc.
# Originally contributed by Dave Love ([email protected]).
#
#This file is part of GCC.
@@ -63,15 +63,25 @@ AC_ARG_ENABLE(objc-gc,
the GNU Objective-C runtime.],
[case $enable_objc_gc in
no)
+ OBJC_GCFLAGS=''
OBJC_BOEHM_GC=''
OBJC_BOEHM_GC_INCLUDES=''
;;
*)
- OBJC_BOEHM_GC=libobjc_gc.la
+ OBJC_GCFLAGS='-DOBJC_WITH_GC=1'
+ OBJC_BOEHM_GC=libobjc_gc$(libsuffix).la
OBJC_BOEHM_GC_INCLUDES='-I$(top_srcdir)/../boehm-gc/include
-I../boehm-gc/include'
+ case "${host}" in
+ alpha*-dec-osf*)
+ # boehm-gc headers include <pthread.h>, which needs to be compiled
+ # with -pthread on Tru64 UNIX.
+ OBJC_GCFLAGS="${OBJC_GCFLAGS} -pthread"
+ ;;
+ esac
;;
esac],
-[OBJC_BOEHM_GC=''; OBJC_BOEHM_GC_INCLUDES=''])
+[OBJC_GCFLAGS=''; OBJC_BOEHM_GC=''; OBJC_BOEHM_GC_INCLUDES=''])
+AC_SUBST(OBJC_GCFLAGS)
AC_SUBST(OBJC_BOEHM_GC)
AC_SUBST(OBJC_BOEHM_GC_INCLUDES)
--
-----------------------------------------------------------------------------
Rainer Orth, Center for Biotechnology, Bielefeld University
