Unverified Commit c6d6f4c5 authored by Paul Burton's avatar Paul Burton
Browse files

MIPS: Always specify -EB or -EL when using clang 



When building using clang, always specify -EB or -EL in order to ensure
we target the desired endianness.

Since clang cross compiles using a single compiler build with multiple
targets, our -dumpmachine tests which don't specify clang's --target
argument check output based upon the build machine rather than the
machine our build will target. This means our detection of whether to
specify -EB fails miserably & we never do. Providing the endianness flag
unconditionally for clang resolves this issue & simplifies the clang
path somewhat.

Signed-off-by: default avatarPaul Burton <paul.burton@mips.com>
parent 36dc5b20

arch/mips/Makefile

+10 −0
Original line number Diff line number Diff line
@@ -122,12 +122,22 @@ cflags-y += -ffreestanding 
# are used, so we kludge that here.  A bug has been filed at

# http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29413.

#

# clang doesn't suffer from these issues and our checks against -dumpmachine

# don't work so well when cross compiling, since without providing --target

# clang's output will be based upon the build machine. So for clang we simply

# unconditionally specify -EB or -EL as appropriate.

#

ifeq ($(cc-name),clang)

cflags-$(CONFIG_CPU_BIG_ENDIAN)		+= -EB

cflags-$(CONFIG_CPU_LITTLE_ENDIAN)	+= -EL

else

undef-all += -UMIPSEB -U_MIPSEB -U__MIPSEB -U__MIPSEB__

undef-all += -UMIPSEL -U_MIPSEL -U__MIPSEL -U__MIPSEL__

predef-be += -DMIPSEB -D_MIPSEB -D__MIPSEB -D__MIPSEB__

predef-le += -DMIPSEL -D_MIPSEL -D__MIPSEL -D__MIPSEL__

cflags-$(CONFIG_CPU_BIG_ENDIAN)		+= $(shell $(CC) -dumpmachine |grep -q 'mips.*el-.*' && echo -EB $(undef-all) $(predef-be))

cflags-$(CONFIG_CPU_LITTLE_ENDIAN)	+= $(shell $(CC) -dumpmachine |grep -q 'mips.*el-.*' || echo -EL $(undef-all) $(predef-le))

endif



cflags-$(CONFIG_SB1XXX_CORELIS)	+= $(call cc-option,-mno-sched-prolog) \

				   -fno-omit-frame-pointer

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