Adding a patch for building on MacOs X Lion

PORTING-NOTES

@@ -7,6 +7,18 @@ on the following architectures
     - MacOS 10.5+  (gcc-4.x 32 and 64 bits)
     - FreeBSD 8.x  (gcc-4.x 32 bits)
 
+
+MacOs X Lion
+
+   To compile stklos on MacOs X Lion, you the following
+   configuration line is known to work:
+
+   $ CFLAGS="-Wl,-no_pie,-no_compact_unwind" ./configure \
+                 --with-provided-gc --with-provided-regexp \
+	         --with-provided-ffi --with-provided-bignum
+
+
+
 ======================================================================
 ======================================================================
 All the informations given below are for old versions (pre-1.0) of

configure

@@ -5739,6 +5739,7 @@ case $OS in
       case $version in
          9*)  OS_NAME_VERSION=DARWIN_9;;
 	 10*) OS_NAME_VERSION=DARWIN_10;;
+	 11*) OS_NAME_VERSION=DARWIN_11;;
 	 *)   OS_NAME_VERSION=DARWIN_OLD;;
       esac
       ;;
@@ -5972,6 +5973,19 @@ echo "*****"
 echo "***** GC support"
 echo "*****"
 
+# Patch code for OSX Lion
+case $OS_NAME_VERSION in
+     DARWIN_11)
+       if test ! -f gc/stklos-patch-applied
+       then
+              echo "**** Patching GC library";
+	      patch -p1 < etc/lion.patch
+	      touch  gc/stklos-patch-applied
+       fi
+       ;;
+esac
+
+
 # Try to determine if libgc is installed
 if ${PKGCONFIG} --exists bdw-gc ;then
    HAVE_GC="yes"

configure.ac

@@ -2,7 +2,7 @@
 ###
 ###           Author: Erick Gallesio [eg@unice.fr]
 ###    Creation date: 28-Dec-1999 21:19 (eg)
-### Last file update: 28-Aug-2011 23:45 (eg)
+### Last file update: 16-Oct-2011 12:37 (eg)
 
 AC_PREREQ(2.64)
 AC_INIT([stklos], [1.10])
@@ -99,6 +99,7 @@ case $OS in
       case $version in
          9*)  OS_NAME_VERSION=DARWIN_9;;
 	 10*) OS_NAME_VERSION=DARWIN_10;;
+	 11*) OS_NAME_VERSION=DARWIN_11;;
 	 *)   OS_NAME_VERSION=DARWIN_OLD;;
       esac
       ;;
@@ -178,6 +179,19 @@ echo "*****"
 echo "***** GC support"
 echo "*****"
 
+# Patch code for OSX Lion
+case $OS_NAME_VERSION in
+     DARWIN_11)
+       if test ! -f gc/stklos-patch-applied
+       then
+              echo "**** Patching GC library";
+	      patch -p1 < etc/lion.patch
+	      touch  gc/stklos-patch-applied
+       fi
+       ;;
+esac
+
+
 # Try to determine if libgc is installed
 if ${PKGCONFIG} --exists bdw-gc ;then
    HAVE_GC="yes"

etc/lion.patch

+diff -r a63253e53bf9 gc/libatomic_ops-1.2/src/atomic_ops/sysdeps/gcc/x86.h
+--- a/gc/libatomic_ops-1.2/src/atomic_ops/sysdeps/gcc/x86.h	Sat Oct 15 23:51:26 2011 +0200
++++ b/gc/libatomic_ops-1.2/src/atomic_ops/sysdeps/gcc/x86.h	Sun Oct 16 00:05:12 2011 +0200
+@@ -113,7 +113,7 @@
+   /* Note: the "xchg" instruction does not need a "lock" prefix */
+   __asm__ __volatile__("xchgb %0, %1"
+ 		: "=q"(oldval), "=m"(*addr)
+-		: "0"(0xff), "m"(*addr) : "memory");
++		       : "0"((unsigned char) 0xff), "m"(*addr) : "memory");
+   return (AO_TS_VAL_t)oldval;
+ }
+ 
+diff -r a63253e53bf9 gc/libatomic_ops-1.2/src/atomic_ops/sysdeps/gcc/x86_64.h
+--- a/gc/libatomic_ops-1.2/src/atomic_ops/sysdeps/gcc/x86_64.h	Sat Oct 15 23:51:26 2011 +0200
++++ b/gc/libatomic_ops-1.2/src/atomic_ops/sysdeps/gcc/x86_64.h	Sun Oct 16 00:05:12 2011 +0200
+@@ -126,7 +126,7 @@
+   /* Note: the "xchg" instruction does not need a "lock" prefix */
+   __asm__ __volatile__("xchgb %0, %1"
+ 		: "=q"(oldval), "=m"(*addr)
+-		: "0"(0xff), "m"(*addr) : "memory");
++		       : "0"((unsigned char) 0xff), "m"(*addr) : "memory");
+   return (AO_TS_VAL_t)oldval;
+ }
+ 
+diff -r a63253e53bf9 gc/mach_dep.c
+--- a/gc/mach_dep.c	Sat Oct 15 23:51:26 2011 +0200
++++ b/gc/mach_dep.c	Sun Oct 16 00:05:12 2011 +0200
+@@ -161,7 +161,7 @@
+ 
+ #if !defined(HAVE_PUSH_REGS) && defined(UNIX_LIKE)
+ # include <signal.h>
+-# include <ucontext.h>
++# include <sys/ucontext.h>
+ #endif
+ 
+ #if defined(UNIX_LIKE) && !defined(NO_GETCONTEXT) &&  \
+diff -r a63253e53bf9 gc/os_dep.c
+--- a/gc/os_dep.c	Sat Oct 15 23:51:26 2011 +0200
++++ b/gc/os_dep.c	Sun Oct 16 00:05:12 2011 +0200
+@@ -2679,7 +2679,7 @@
+ # if defined(MSWIN32) || defined(MSWINCE)
+     LONG WINAPI GC_write_fault_handler(struct _EXCEPTION_POINTERS *exc_info)
+ # else
+-#   include <ucontext.h>
++#   include <sys/ucontext.h>
+     /*ARGSUSED*/
+     STATIC void GC_write_fault_handler(int sig, siginfo_t *si, void *raw_sc)
+ # endif /* MSWIN32 || MSWINCE */