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80 lines
3.0 KiB
Diff
80 lines
3.0 KiB
Diff
By Lennert Buytenhek <buytenh@wantstofly.org>
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Adds support for arm*b-linux* big-endian ARM targets
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Fixes following build error for big-endian ARM targets:
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armeb-unknown-linux-gnu/gcc-4.0.0-20050410-glibc-2.3.4/bin/../lib/gcc/armeb-unknown-linux-gnu/4.0.0/../../../../armeb-unknown-linux-gnu/bin/ld: unrecognised emulation mode: armelf_linux
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Supported emulations: armelfb_linux armelfb
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collect2: ld returned 1 exit status
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make[2]: *** [crosstool-0.32/build/armeb-unknown-linux-gnu/gcc-4.0.0-20050410-glibc-2.3.4/build-glibc/csu/crt1.o] Error 1
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make[2]: Leaving directory `crosstool-0.32/build/armeb-unknown-linux-gnu/gcc-4.0.0-20050410-glibc-2.3.4/glibc-2.3.4/csu'
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make[1]: *** [csu/subdir_lib] Error 2
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make[1]: Leaving directory `crosstool-0.32/build/armeb-unknown-linux-gnu/gcc-4.0.0-20050410-glibc-2.3.4/glibc-2.3.4'
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make: *** [lib] Error 2
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See http://gcc.gnu.org/PR16350
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--- gcc-4.0-20050305/gcc/config/arm/linux-elf.h.orig 2005-03-23 18:44:54.822707377 +0100
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+++ gcc-4.0-20050305/gcc/config/arm/linux-elf.h 2005-03-23 18:46:18.228560206 +0100
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@@ -31,19 +31,33 @@
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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
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+ * arm*b-*-linux* (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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#undef TARGET_DEFAULT_FLOAT_ABI
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#define TARGET_DEFAULT_FLOAT_ABI ARM_FLOAT_ABI_HARD
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#undef TARGET_DEFAULT
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-#define TARGET_DEFAULT (0)
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+#define TARGET_DEFAULT (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", "mno-thumb-interwork" }
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+ { "marm", TARGET_ENDIAN_OPTION, "mhard-float", "mno-thumb-interwork" }
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/* The GNU C++ standard library requires that these macros be defined. */
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#undef CPLUSPLUS_CPP_SPEC
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@@ -90,7 +104,7 @@
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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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#define TARGET_OS_CPP_BUILTINS() \
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--- gcc-4.0-20050305/gcc/config.gcc.orig 2005-03-23 18:46:23.318105335 +0100
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+++ gcc-4.0-20050305/gcc/config.gcc 2005-03-23 18:47:41.592546386 +0100
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@@ -650,6 +650,11 @@
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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 linux.h arm/elf.h arm/linux-gas.h arm/linux-elf.h arm/aout.h arm/arm.h"
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+ case $target in
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+ arm*b-*-linux*)
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+ tm_defines="${tm_defines} TARGET_BIG_ENDIAN_DEFAULT=1"
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+ ;;
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+ esac
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tmake_file="${tmake_file} arm/t-arm 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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