[Minios-devel] [PATCH v2] 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.
Both gcc and clang understand "-print-libgcc-file-name".

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

diff --git a/Makefile b/Makefile
index 5bdcdac..8e36c65 100644
--- a/Makefile
+++ b/Makefile
@@ -145,6 +145,7 @@ APP_LDLIBS += -lz
 APP_LDLIBS += -lm
 LDLIBS += -lc
 endif
+LDLIBS += $(shell $(CC) -print-libgcc-file-name $(CFLAGS))
 
 ifneq ($(APP_OBJS)-$(lwip),-y)
 OBJS := $(filter-out $(OBJ_DIR)/daytime.o, $(OBJS))

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