Applied H.J.Lu's patch to not require -lpthread when compiling single threaded Objective-C programs.

From-SVN: r35141

5 files changed, 209 insertions, 15 deletions

diff --git a/libobjc/ChangeLog b/libobjc/ChangeLog
index d3cb386..d94fcd8 100644
--- a/libobjc/ChangeLog
+++ b/libobjc/ChangeLog
@@ -1,3 +1,15 @@
+2000-05-12  H.J. Lu  (hjl@gnu.org)
+
+	* Makefile.in (GTHREAD_FLAGS): New.
+	(ALL_CFLAGS): Add $(GTHREAD_FLAGS).
+	(OBJC_THREAD_FILE): Changed to thr-objc.
+
+	* configure.in (GTHREAD_FLAGS): New, check and replace it for
+	Makefile.
+	(OBJC_THREAD_FILE): Removed.
+
+	* thr-objc.c: New.
+
 2000-07-13  Kaveh R. Ghazi  <ghazi@caip.rutgers.edu>
 
 	* objc/hash.h: Include string.h.
diff --git a/libobjc/Makefile.in b/libobjc/Makefile.in
index e783361..1180d6b 100644
--- a/libobjc/Makefile.in
+++ b/libobjc/Makefile.in
@@ -60,8 +60,9 @@ RANLIB = @RANLIB@
 
 CC = @CC@
 CFLAGS = @CFLAGS@
+GTHREAD_FLAGS=@GTHREAD_FLAGS@
 ALL_CFLAGS = -I. -I$(srcdir) $(CPPFLAGS) $(DEFS) $(CFLAGS) \
-	-DIN_GCC -DIN_TARGET_LIBS
+	$(GTHREAD_FLAGS) -DIN_GCC -DIN_TARGET_LIBS
 
 #
 # Define the cc1obj in terms of the CC that is passed on from higher
@@ -76,7 +77,7 @@ INCLUDES = -I$(srcdir)/objc  -I$(srcdir)/$(MULTISRCTOP)../gcc \
   -I$(srcdir)/$(MULTISRCTOP)../include
 
 OBJC_GCFLAGS=-DOBJC_WITH_GC=1
-OBJC_THREAD_FILE=thr-@OBJC_THREAD_FILE@
+OBJC_THREAD_FILE=thr-objc
 
 .SUFFIXES:
 .SUFFIXES: .c .m .o
diff --git a/libobjc/configure b/libobjc/configure
index 0469252..9d0322d 100755
--- a/libobjc/configure
+++ b/libobjc/configure
@@ -1140,23 +1140,23 @@ EOF
 fi
 
 
-# Determine the name of the GCC thread file.
+# Determine gthread FLAGS.
 
-echo $ac_n "checking for thread file""... $ac_c" 1>&6
-echo "configure:1147: checking for thread file" >&5
-if eval "test \"`echo '$''{'objc_cv_thread_file'+set}'`\" = set"; then
+echo $ac_n "checking for gthread FLAGS""... $ac_c" 1>&6
+echo "configure:1147: checking for gthread FLAGS" >&5
+if eval "test \"`echo '$''{'objc_cv_gthread_flags'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   if test -f "$r"/gcc/Makefile
 then
-  objc_cv_thread_file=`grep \^GCC_THREAD_FILE "$r"/gcc/Makefile | awk -F= '{ print $2 }'`
+  objc_cv_gthread_flags=`grep \^GTHREAD_FLAGS "$r"/gcc/Makefile | awk -F= '{ print $2 }'`
 else
   { echo "configure: error: not found" 1>&2; exit 1; }
 fi
 fi
 
-echo "$ac_t""$objc_cv_thread_file" 1>&6
-OBJC_THREAD_FILE=$objc_cv_thread_file
+echo "$ac_t""$objc_cv_gthread_flags" 1>&6
+GTHREAD_FLAGS=$objc_cv_gthread_flags
 
 
 # Check whether --enable-objc-gc or --disable-objc-gc was given.
@@ -1327,7 +1327,7 @@ s%@INSTALL_PROGRAM@%$INSTALL_PROGRAM%g
 s%@INSTALL_SCRIPT@%$INSTALL_SCRIPT%g
 s%@INSTALL_DATA@%$INSTALL_DATA%g
 s%@CPP@%$CPP%g
-s%@OBJC_THREAD_FILE@%$OBJC_THREAD_FILE%g
+s%@GTHREAD_FLAGS@%$GTHREAD_FLAGS%g
 s%@OBJC_BOEHM_GC@%$OBJC_BOEHM_GC%g
 
 CEOF
diff --git a/libobjc/configure.in b/libobjc/configure.in
index 821dcd2..b2d656a 100644
--- a/libobjc/configure.in
+++ b/libobjc/configure.in
@@ -91,17 +91,17 @@ the Objective C runtime system.  If necessary, install gcc now with
 
 AC_HEADER_STDC
 
-# Determine the name of the GCC thread file.
+# Determine CFLAGS for gthread.
 
-AC_CACHE_CHECK([for thread file],objc_cv_thread_file,
+AC_CACHE_CHECK([for gthread cflags],objc_cv_gthread_flags,
 [if test -f "$r"/gcc/Makefile
 then
-  objc_cv_thread_file=`grep \^GCC_THREAD_FILE "$r"/gcc/Makefile | awk -F= '{ print $2 }'`
+  objc_cv_gthread_flags=`grep \^GTHREAD_FLAGS "$r"/gcc/Makefile | awk -F= '{ print $2 }'`
 else
   AC_MSG_ERROR([not found])
 fi])
-OBJC_THREAD_FILE=$objc_cv_thread_file
-AC_SUBST(OBJC_THREAD_FILE)
+GTHREAD_FLAGS=$objc_cv_gthread_flags
+AC_SUBST(GTHREAD_FLAGS)
 
 AC_ARG_ENABLE(objc-gc,
 [  --enable-objc-gc       enable the use of Boehm's garbage collector with
diff --git a/libobjc/thr-objc.c b/libobjc/thr-objc.c
new file mode 100644
index 0000000..48150f0
--- /dev/null
+++ b/libobjc/thr-objc.c
@@ -0,0 +1,181 @@
+/* GNU Objective C Runtime Thread Interface.
+   Copyright (C) 1999 Free Software Foundation, Inc.
+
+This file is part of GNU CC.
+
+GNU CC is free software; you can redistribute it and/or modify it under the
+terms of the GNU General Public License as published by the Free Software
+Foundation; either version 2, or (at your option) any later version.
+
+GNU CC is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
+details.
+
+You should have received a copy of the GNU General Public License
+along with GNU CC; see the file COPYING.  If not, write to
+the Free Software Foundation, 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA.  */
+
+/* As a special exception, if you link this library with files compiled with
+   GCC to produce an executable, this does not cause the resulting executable
+   to be covered by the GNU General Public License. This exception does not
+   however invalidate any other reasons why the executable file might be
+   covered by the GNU General Public License.  */
+
+#define _LIBOBJC
+#include "tconfig.h"
+#include "defaults.h"
+#include <objc/thr.h>
+#include "runtime.h"
+#include <gthr.h>
+
+/* Backend initialization functions */
+
+/* Initialize the threads subsystem. */
+int
+__objc_init_thread_system(void)
+{
+  return __gthread_objc_init_thread_system ();
+}
+
+/* Close the threads subsystem. */
+int
+__objc_close_thread_system(void)
+{
+  return __gthread_objc_close_thread_system ();
+}
+
+/* Backend thread functions */
+
+/* Create a new thread of execution. */
+objc_thread_t
+__objc_thread_detach(void (*func)(void *), void *arg)
+{
+  return __gthread_objc_thread_detach (func, arg);
+}
+
+/* Set the current thread's priority. */
+int
+__objc_thread_set_priority(int priority)
+{
+  return __gthread_objc_thread_set_priority (priority);
+}
+
+/* Return the current thread's priority. */
+int
+__objc_thread_get_priority(void)
+{
+  return __gthread_objc_thread_get_priority ();
+}
+
+/* Yield our process time to another thread. */
+void
+__objc_thread_yield(void)
+{
+  __gthread_objc_thread_yield ();
+}
+
+/* Terminate the current thread. */
+int
+__objc_thread_exit(void)
+{
+  return __gthread_objc_thread_exit ();
+}
+
+/* Returns an integer value which uniquely describes a thread. */
+objc_thread_t
+__objc_thread_id(void)
+{
+  return __gthread_objc_thread_id ();
+}
+
+/* Sets the thread's local storage pointer. */
+int
+__objc_thread_set_data(void *value)
+{
+  return __gthread_objc_thread_set_data (value);
+}
+
+/* Returns the thread's local storage pointer. */
+void *
+__objc_thread_get_data(void)
+{
+  return __gthread_objc_thread_get_data ();
+}
+
+/* Backend mutex functions */
+
+/* Allocate a mutex. */
+int
+__objc_mutex_allocate(objc_mutex_t mutex)
+{
+  return __gthread_objc_mutex_allocate (mutex);
+}
+
+/* Deallocate a mutex. */
+int
+__objc_mutex_deallocate(objc_mutex_t mutex)
+{
+  return __gthread_objc_mutex_deallocate (mutex);
+}
+
+/* Grab a lock on a mutex. */
+int
+__objc_mutex_lock(objc_mutex_t mutex)
+{
+  return __gthread_objc_mutex_lock (mutex);
+}
+
+/* Try to grab a lock on a mutex. */
+int
+__objc_mutex_trylock(objc_mutex_t mutex)
+{
+  return __gthread_objc_mutex_trylock (mutex);
+}
+
+/* Unlock the mutex */
+int
+__objc_mutex_unlock(objc_mutex_t mutex)
+{
+  return __gthread_objc_mutex_unlock (mutex);
+}
+
+/* Backend condition mutex functions */
+
+/* Allocate a condition. */
+int
+__objc_condition_allocate(objc_condition_t condition)
+{
+  return __gthread_objc_condition_allocate (condition);
+}
+
+/* Deallocate a condition. */
+int
+__objc_condition_deallocate(objc_condition_t condition)
+{
+  return __gthread_objc_condition_deallocate (condition);
+}
+
+/* Wait on the condition */
+int
+__objc_condition_wait(objc_condition_t condition, objc_mutex_t mutex)
+{
+  return __gthread_objc_condition_wait (condition, mutex);
+}
+
+/* Wake up all threads waiting on this condition. */
+int
+__objc_condition_broadcast(objc_condition_t condition)
+{
+  return __gthread_objc_condition_broadcast (condition);
+}
+
+/* Wake up one thread waiting on this condition. */
+int
+__objc_condition_signal(objc_condition_t condition)
+{
+  return __gthread_objc_condition_signal (condition);
+}
+
+/* End of File */