Some older GCC version (at least 4.6) emits calls to __bswapsi2() when building the XZ decompressor. The link of the compressed image then fails with the following error:
arch/mips/boot/compressed/decompress.o: In function '__fswab32': include/uapi/linux/swab.h:60: undefined reference to '__bswapsi2' Add bswapsi.o to the link to fix the build with these versions. Signed-off-by: Alban Bedel <[email protected]> --- Changelog: v2: * Added CC to stable as the patch hasn't been merged in 4.4 v3: * Updated to 4.5-rc1 * Removed CC to stable as this version of the patch doesn't apply to 4.4. --- arch/mips/boot/compressed/Makefile | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/arch/mips/boot/compressed/Makefile b/arch/mips/boot/compressed/Makefile index 4eff1ef..acfc3ce 100644 --- a/arch/mips/boot/compressed/Makefile +++ b/arch/mips/boot/compressed/Makefile @@ -39,10 +39,10 @@ vmlinuzobjs-$(CONFIG_SYS_SUPPORTS_ZBOOT_UART_PROM) += $(obj)/uart-prom.o vmlinuzobjs-$(CONFIG_MIPS_ALCHEMY) += $(obj)/uart-alchemy.o endif -vmlinuzobjs-$(CONFIG_KERNEL_XZ) += $(obj)/ashldi3.o +vmlinuzobjs-$(CONFIG_KERNEL_XZ) += $(obj)/ashldi3.o $(obj)/bswapsi.o -$(obj)/ashldi3.o: KBUILD_CFLAGS += -I$(srctree)/arch/mips/lib -$(obj)/ashldi3.c: $(srctree)/arch/mips/lib/ashldi3.c +$(obj)/ashldi3.o $(obj)/bswapsi.o: KBUILD_CFLAGS += -I$(srctree)/arch/mips/lib +$(obj)/ashldi3.c $(obj)/bswapsi.c: $(obj)/%.c: $(srctree)/arch/mips/lib/%.c $(call cmd,shipped) targets := $(notdir $(vmlinuzobjs-y)) -- 2.0.0
