From bd1c16fe501aeabea8ecedc3585750c4470e6eae Mon Sep 17 00:00:00 2001
From: Dave Murphy <davem@devkitpro.org>
Date: Tue, 27 Jun 2017 18:34:13 +0100
Subject: [PATCH] provide stub __sync_synchronize

---
 dkarm-eabi/patches/newlib-2.5.0.patch | 76 ++++++++++++++++++++++++++-
 1 file changed, 75 insertions(+), 1 deletion(-)

diff --git a/dkarm-eabi/patches/newlib-2.5.0.patch b/dkarm-eabi/patches/newlib-2.5.0.patch
index f19d7a6..8696000 100644
--- a/dkarm-eabi/patches/newlib-2.5.0.patch
+++ b/dkarm-eabi/patches/newlib-2.5.0.patch
@@ -976,7 +976,7 @@ index 0000000..48ce950
 +/* symbol prefix */
 +#undef __SYMBOL_PREFIX
 diff --git a/libgloss/libsysbase/configure b/libgloss/libsysbase/configure
-new file mode 100755
+new file mode 100644
 index 0000000..c4b5a79
 --- /dev/null
 +++ b/libgloss/libsysbase/configure
@@ -7635,6 +7635,80 @@ index 8572821..e6baf35 100644
  {
    return __get_current_locale ()->ctype_ptr;
  }
+diff --git a/newlib/libc/machine/arm/Makefile.am b/newlib/libc/machine/arm/Makefile.am
+index 62ed158..7f34177 100644
+--- a/newlib/libc/machine/arm/Makefile.am
++++ b/newlib/libc/machine/arm/Makefile.am
+@@ -11,7 +11,9 @@ noinst_LIBRARIES = lib.a
+ lib_a_SOURCES = setjmp.S access.c strcmp.S strcpy.c \
+ 		aeabi_memcpy.c aeabi_memcpy-armv7a.S \
+ 		aeabi_memmove.c aeabi_memmove-soft.S \
+-		aeabi_memset.c aeabi_memset-soft.S aeabi_memclr.c
++		aeabi_memset.c aeabi_memset-soft.S aeabi_memclr.c \
++		sync_synchronize.c
++
+ lib_a_SOURCES += memchr-stub.c
+ lib_a_SOURCES += memchr.S
+ lib_a_SOURCES += memcpy-stub.c
+diff --git a/newlib/libc/machine/arm/Makefile.in b/newlib/libc/machine/arm/Makefile.in
+index 4908208..694cbb0 100644
+--- a/newlib/libc/machine/arm/Makefile.in
++++ b/newlib/libc/machine/arm/Makefile.in
+@@ -76,10 +76,10 @@ am_lib_a_OBJECTS = lib_a-setjmp.$(OBJEXT) lib_a-access.$(OBJEXT) \
+ 	lib_a-aeabi_memmove.$(OBJEXT) \
+ 	lib_a-aeabi_memmove-soft.$(OBJEXT) \
+ 	lib_a-aeabi_memset.$(OBJEXT) lib_a-aeabi_memset-soft.$(OBJEXT) \
+-	lib_a-aeabi_memclr.$(OBJEXT) lib_a-memchr-stub.$(OBJEXT) \
+-	lib_a-memchr.$(OBJEXT) lib_a-memcpy-stub.$(OBJEXT) \
+-	lib_a-memcpy.$(OBJEXT) lib_a-strlen-stub.$(OBJEXT) \
+-	lib_a-strlen.$(OBJEXT)
++	lib_a-aeabi_memclr.$(OBJEXT) lib_a-sync_synchronize.$(OBJEXT) \
++	lib_a-memchr-stub.$(OBJEXT) lib_a-memchr.$(OBJEXT) \
++	lib_a-memcpy-stub.$(OBJEXT) lib_a-memcpy.$(OBJEXT) \
++	lib_a-strlen-stub.$(OBJEXT) lib_a-strlen.$(OBJEXT)
+ lib_a_OBJECTS = $(am_lib_a_OBJECTS)
+ DEFAULT_INCLUDES = -I.@am__isrc@
+ depcomp =
+@@ -209,8 +209,8 @@ noinst_LIBRARIES = lib.a
+ lib_a_SOURCES = setjmp.S access.c strcmp.S strcpy.c aeabi_memcpy.c \
+ 	aeabi_memcpy-armv7a.S aeabi_memmove.c aeabi_memmove-soft.S \
+ 	aeabi_memset.c aeabi_memset-soft.S aeabi_memclr.c \
+-	memchr-stub.c memchr.S memcpy-stub.c memcpy.S strlen-stub.c \
+-	strlen.S
++	sync_synchronize.c memchr-stub.c memchr.S memcpy-stub.c \
++	memcpy.S strlen-stub.c strlen.S
+ lib_a_CCASFLAGS = $(AM_CCASFLAGS)
+ lib_a_CFLAGS = $(AM_CFLAGS)
+ ACLOCAL_AMFLAGS = -I ../../.. -I ../../../..
+@@ -374,6 +374,12 @@ lib_a-aeabi_memclr.o: aeabi_memclr.c
+ lib_a-aeabi_memclr.obj: aeabi_memclr.c
+ 	$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CFLAGS) $(CFLAGS) -c -o lib_a-aeabi_memclr.obj `if test -f 'aeabi_memclr.c'; then $(CYGPATH_W) 'aeabi_memclr.c'; else $(CYGPATH_W) '$(srcdir)/aeabi_memclr.c'; fi`
+ 
++lib_a-sync_synchronize.o: sync_synchronize.c
++	$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CFLAGS) $(CFLAGS) -c -o lib_a-sync_synchronize.o `test -f 'sync_synchronize.c' || echo '$(srcdir)/'`sync_synchronize.c
++
++lib_a-sync_synchronize.obj: sync_synchronize.c
++	$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CFLAGS) $(CFLAGS) -c -o lib_a-sync_synchronize.obj `if test -f 'sync_synchronize.c'; then $(CYGPATH_W) 'sync_synchronize.c'; else $(CYGPATH_W) '$(srcdir)/sync_synchronize.c'; fi`
++
+ lib_a-memchr-stub.o: memchr-stub.c
+ 	$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CFLAGS) $(CFLAGS) -c -o lib_a-memchr-stub.o `test -f 'memchr-stub.c' || echo '$(srcdir)/'`memchr-stub.c
+ 
+diff --git a/newlib/libc/machine/arm/sync_synchronize.c b/newlib/libc/machine/arm/sync_synchronize.c
+new file mode 100644
+index 0000000..3acc9e0
+--- /dev/null
++++ b/newlib/libc/machine/arm/sync_synchronize.c
+@@ -0,0 +1,10 @@
++#if __ARM_ARCH < 6
++#include <sys/cdefs.h>
++void __attribute__((weak))
++__sync_synchronize (void)
++{
++  __warn_references (__sync_synchronize,
++		     "legacy compatible __sync_synchronize used. Not suitable for multi-threaded applications");
++  return;
++}
++#endif
 diff --git a/newlib/libc/machine/arm/sys/stdio.h b/newlib/libc/machine/arm/sys/stdio.h
 new file mode 100644
 index 0000000..4eb278e