Hi,
Attached is a patch that modifies BE8_LINK_SPEC to pass -be8 option to the
linker by default if the target is big endian, and to not pass -be8 option if
-mlittle-endian is used. It also preserves the existing usage whereby -be8
gets passed with the use of -mbig-endian.
Patch:
bash-3.00$ svn diff
Index: gcc/ChangeLog
===================================================================
--- gcc/ChangeLog (revision 189388)
+++ gcc/ChangeLog (working copy)
@@ -1,3 +1,9 @@
+2012-07-10 Bharathi Seshadri <bsesh...@cisco.com>
+ Jim Wilson <jimwi...@cisco.com>
+
+ * config/arm/bpabi.h (BE8_LINK_SPEC): Set according to
+ TARGET_BIG_ENDIAN_DEFAULT.
+
2012-07-09 Jason Merrill <ja...@redhat.com>
PR c++/53882
Index: gcc/config/arm/bpabi.h
===================================================================
--- gcc/config/arm/bpabi.h (revision 189388)
+++ gcc/config/arm/bpabi.h (working copy)
@@ -55,15 +55,27 @@
#define TARGET_FIX_V4BX_SPEC " %{mcpu=arm8|mcpu=arm810|mcpu=strongarm*"\
"|march=armv4|mcpu=fa526|mcpu=fa626:--fix-v4bx}"
+#if TARGET_BIG_ENDIAN_DEFAULT
#define BE8_LINK_SPEC \
- " %{mbig-endian:%{march=armv7-a|mcpu=cortex-a5 \
- |mcpu=cortex-a7 \
- |mcpu=cortex-a8|mcpu=cortex-a9|mcpu=cortex-a15 \
- |mcpu=generic-armv7-a \
- |march=armv7-m|mcpu=cortex-m3 \
- |march=armv7e-m|mcpu=cortex-m4 \
- |march=armv6-m|mcpu=cortex-m0 \
+ " %{!mlittle-endian:%{march=armv7-a|mcpu=cortex-a5 \
+ |mcpu=cortex-a7 \
+ |mcpu=cortex-a8|mcpu=cortex-a9|mcpu=cortex-a15 \
+ |mcpu=generic-armv7-a \
+ |march=armv7-m|mcpu=cortex-m3 \
+ |march=armv7e-m|mcpu=cortex-m4 \
+ |march=armv6-m|mcpu=cortex-m0 \
:%{!r:--be8}}}"
+#else
+#define BE8_LINK_SPEC \
+ " %{mbig-endian:%{march=armv7-a|mcpu=cortex-a5 \
+ |mcpu=cortex-a7 \
+ |mcpu=cortex-a8|mcpu=cortex-a9|mcpu=cortex-a15 \
+ |mcpu=generic-armv7-a \
+ |march=armv7-m|mcpu=cortex-m3 \
+ |march=armv7e-m|mcpu=cortex-m4 \
+ |march=armv6-m|mcpu=cortex-m0 \
+ :%{!r:--be8}}}"
+#endif
/* Tell the assembler to build BPABI binaries. */
#undef SUBTARGET_EXTRA_ASM_SPEC
Test:
# Built arm-eabi and armeb-linux-gnueabi cross-compilers on Linux x86_64 on gcc
trunk (as of 07/10/2012) .
# Running the armeb-linux-gnueabi compiler with -v option shows that -be8
option is being passed by default; With -mlittle-endian, it can be seen that
the option is not passed.
bash-3.00$ cat ~/t1.c
int
main (void)
{
return 0;
}
bash-3.00$ armeb-linux-gnueabi-gcc -v ~/t1.c
<snip>
/auto/compiler-dev/bseshadr/gcc-trunk/build/c4.7.1-p0/x86_64-linux/libexec/gcc/armeb-linux-gnueabi/4.8.0/collect2
--sysroot=/auto/compiler-dev/bseshadr/gcc-trunk/build/c4.7.1-p0/x86_64-linux/armeb-linux-gnueabi/sys
--eh-frame-hdr --be8 -dynamic-linker /lib/ld-linux.so.3 -X -m
armelfb_linux_eabi
/auto/compiler-dev/bseshadr/gcc-trunk/build/c4.7.1-p0/x86_64-linux/armeb-linux-gnueabi/sys/usr/lib/crt1.o
/auto/compiler-dev/bseshadr/gcc-trunk/build/c4.7.1-p0/x86_64-linux/armeb-linux-gnueabi/sys/usr/lib/crti.o
/auto/compiler-dev/bseshadr/gcc-trunk/build/c4.7.1-p0/x86_64-linux/lib/gcc/armeb-linux-gnueabi/4.8.0/crtbegin.o
-L/auto/compiler-dev/bseshadr/gcc-trunk/build/c4.7.1-p0/x86_64-linux/lib/gcc/armeb-linux-gnueabi/4.8.0
-L/auto/compiler-dev/bseshadr/gcc-trunk/build/c4.7.1-p0/x86_64-linux/lib/gcc/armeb-linux-gnueabi/4.8.0/../../../../../x86_64-linux/armeb-linux-gnueabi/lib
-L/auto/compiler-dev/bseshadr/gcc-trunk/build/c4.7.1-p0/x86_64-linux/armeb-linux-gnueabi/sys/lib
-L/auto/compiler-dev/bseshadr/gcc-trunk/build/c4.7.1-p0/x86_64-linux/armeb-linux-gnueabi/sys/usr/lib
/tmp/ccA09qV0.o -lgcc --as-needed -lgcc_s --no-as-needed -lc -lgcc --as-needed
-lgcc_s --no-as-needed
/auto/compiler-dev/bseshadr/gcc-trunk/build/c4.7.1-p0/x86_64-linux/lib/gcc/armeb-linux-gnueabi/4.8.0/crtend.o
/auto/compiler-dev/bseshadr/gcc-trunk/build/c4.7.1-p0/x86_64-linux/armeb-linux-gnueabi/sys/usr/lib/crtn.o
bash-3.00$ armeb-linux-gnueabi-gcc -v -mlittle-endian ~/t1.c
<snip>
/auto/compiler-dev/bseshadr/gcc-trunk/build/c4.7.1-p0/x86_64-linux/libexec/gcc/armeb-linux-gnueabi/4.8.0/collect2
--sysroot=/auto/compiler-dev/bseshadr/gcc-trunk/build/c4.7.1-p0/x86_64-linux/armeb-linux-gnueabi/sys
--eh-frame-hdr -dynamic-linker /lib/ld-linux.so.3 -X -EL -m armelfb_linux_eabi
/auto/compiler-dev/bseshadr/gcc-trunk/build/c4.7.1-p0/x86_64-linux/armeb-linux-gnueabi/sys/usr/lib/crt1.o
/auto/compiler-dev/bseshadr/gcc-trunk/build/c4.7.1-p0/x86_64-linux/armeb-linux-gnueabi/sys/usr/lib/crti.o
/auto/compiler-dev/bseshadr/gcc-trunk/build/c4.7.1-p0/x86_64-linux/lib/gcc/armeb-linux-gnueabi/4.8.0/crtbegin.o
-L/auto/compiler-dev/bseshadr/gcc-trunk/build/c4.7.1-p0/x86_64-linux/lib/gcc/armeb-linux-gnueabi/4.8.0
-L/auto/compiler-dev/bseshadr/gcc-trunk/build/c4.7.1-p0/x86_64-linux/lib/gcc/armeb-linux-gnueabi/4.8.0/../../../../../x86_64-linux/armeb-linux-gnueabi/lib
-L/auto/compiler-dev/bseshadr/gcc-trunk/build/c4.7.1-p0/x86_64-linux/armeb-linux-gnueabi/sys/lib
-L/auto/compiler-dev/bseshadr/gcc-trunk/build/c4.7.1-p0/x86_64-linux/armeb-linux-gnueabi/sys/usr/lib
/tmp/cckylg2b.o -lgcc --as-needed -lgcc_s --no-as-needed -lc -lgcc --as-needed
-lgcc_s --no-as-needed
/auto/compiler-dev/bseshadr/gcc-trunk/build/c4.7.1-p0/x86_64-linux/lib/gcc/armeb-linux-gnueabi/4.8.0/crtend.o
/auto/compiler-dev/bseshadr/gcc-trunk/build/c4.7.1-p0/x86_64-linux/armeb-linux-gnueabi/sys/usr/lib/crtn.o
Bharathi
