forked from Archive/PX4-Autopilot
69 lines
2.1 KiB
Diff
69 lines
2.1 KiB
Diff
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By Lennert Buytenhek <buytenh@wantstofly.org>
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Adds support for arm*b-linux* big-endian ARM targets
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See http://gcc.gnu.org/PR16350
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--- gcc-3.3.5-dist/gcc/config/arm/linux-elf.h
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+++ gcc-3.3.5/gcc/config/arm/linux-elf.h
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@@ -30,17 +30,34 @@
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/* Do not assume anything about header files. */
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#define NO_IMPLICIT_EXTERN_C
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+/*
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+ * 'config.gcc' defines TARGET_BIG_ENDIAN_DEFAULT as 1 for arm*b-*
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+ * (big endian) configurations.
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+ */
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+#if TARGET_BIG_ENDIAN_DEFAULT
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+#define TARGET_ENDIAN_DEFAULT ARM_FLAG_BIG_END
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+#define TARGET_ENDIAN_OPTION "mbig-endian"
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+#define TARGET_LINKER_EMULATION "armelfb_linux"
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+#else
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+#define TARGET_ENDIAN_DEFAULT 0
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+#define TARGET_ENDIAN_OPTION "mlittle-endian"
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+#define TARGET_LINKER_EMULATION "armelf_linux"
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+#endif
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+
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/* Default is to use APCS-32 mode. */
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#undef TARGET_DEFAULT
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-#define TARGET_DEFAULT (ARM_FLAG_APCS_32 | ARM_FLAG_MMU_TRAPS)
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+#define TARGET_DEFAULT \
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+ ( ARM_FLAG_APCS_32 | \
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+ ARM_FLAG_MMU_TRAPS | \
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+ TARGET_ENDIAN_DEFAULT )
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#define SUBTARGET_CPU_DEFAULT TARGET_CPU_arm6
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-#define SUBTARGET_EXTRA_LINK_SPEC " -m armelf_linux -p"
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+#define SUBTARGET_EXTRA_LINK_SPEC " -m " TARGET_LINKER_EMULATION " -p"
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#undef MULTILIB_DEFAULTS
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#define MULTILIB_DEFAULTS \
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- { "marm", "mlittle-endian", "mhard-float", "mapcs-32", "mno-thumb-interwork" }
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+ { "marm", TARGET_ENDIAN_OPTION, "mhard-float", "mapcs-32", "mno-thumb-interwork" }
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#define CPP_APCS_PC_DEFAULT_SPEC "-D__APCS_32__"
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@@ -100,7 +117,7 @@
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%{rdynamic:-export-dynamic} \
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%{!dynamic-linker:-dynamic-linker /lib/ld-linux.so.2} \
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-X \
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- %{mbig-endian:-EB}" \
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+ %{mbig-endian:-EB} %{mlittle-endian:-EL}" \
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SUBTARGET_EXTRA_LINK_SPEC
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#endif
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--- gcc-3.3.5-dist/gcc/config.gcc
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+++ gcc-3.3.5/gcc/config.gcc
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@@ -710,6 +710,11 @@
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;;
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arm*-*-linux*) # ARM GNU/Linux with ELF
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tm_file="dbxelf.h elfos.h arm/elf.h arm/linux-gas.h arm/linux-elf.h arm/aout.h arm/arm.h"
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+ case $target in
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+ arm*b-*)
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+ tm_defines="TARGET_BIG_ENDIAN_DEFAULT=1 $tm_defines"
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+ ;;
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+ esac
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tmake_file="t-slibgcc-elf-ver t-linux arm/t-linux"
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extra_parts="crtbegin.o crtbeginS.o crtend.o crtendS.o"
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gnu_ld=yes
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