[Xen-devel] [PATCH] mini-os: link to libgcc.a to fix build with gcc7

[Olaf Hering <olaf@xxxxxxxxx>]

gcc7 generates a call to __udivmoddi4 ...

stubdom/mini-os-x86_32-grub/mini-os.o: In function `_strtoll_r':
stubdom/newlib-x86_32/i686-xen-elf/newlib/libc/stdlib/../../../../../newlib-1.16.0/newlib/libc/stdlib/strtoll_r.c:110:
 undefined reference to `__udivmoddi4'
make[2]: *** [Makefile:167: stubdom/mini-os-x86_32-grub/mini-os] Error 1

... which the linker only finds if libgcc.a is provided on the commandline.

Signed-off-by: Olaf Hering <olaf@xxxxxxxxx>
---
 Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index ef8559b..b9c1336 100644
--- a/Makefile
+++ b/Makefile
@@ -162,7 +162,7 @@ $(OBJ_DIR)/arch/x86/minios-x86%.lds:  
arch/x86/minios-x86.lds.S
        $(CPP) $(ASFLAGS) -P $< -o $@
 
 $(OBJ_DIR)/$(TARGET): $(OBJS) $(APP_O) arch_lib 
$(OBJ_DIR)/$(TARGET_ARCH_DIR)/minios-$(MINIOS_TARGET_ARCH).lds
-       $(LD) -r $(LDFLAGS) $(HEAD_OBJ) $(APP_O) $(OBJS) $(LDARCHLIB) $(LDLIBS) 
-o $@.o
+       $(LD) -r $(LDFLAGS) $(HEAD_OBJ) $(APP_O) $(OBJS) $(LDARCHLIB) $(LDLIBS) 
$$(gcc -print-libgcc-file-name $(CFLAGS)) -o $@.o
        $(OBJCOPY) -w -G $(GLOBAL_PREFIX)* -G _start $@.o $@.o
        $(LD) $(LDFLAGS) $(LDFLAGS_FINAL) $@.o $(EXTRA_OBJS) -o $@
        gzip -f -9 -c $@ >$@.gz

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