re PR target/16350 (gcc only understands little endian ARM systems)

  PR target/16350
* config.gcc: For arm*b-* define TARGET_BIG_ENDIAN_DEFAULT.
* config/arm/linux-elf.h (TARGET_ENDIAN_DEFAULT): Define based on TARGET_BIG_ENDIAN_DEFAULT.
   Use for MULTILIB_DEFAULTS.
   (TARGET_DEFAULT): Set according to TARGET_ENDIAN_DEFAULT.
   (LINUX_TARGET_LINK_SPEC): Pass -mlittle-endian on to the assembler.
* config/arm/linux-eabi.h (TARGET_LINKER_EMULATION): Set according to TARGET_BIG_ENDIAN_DEFAULT.
   (SUBTARGET_EXTRA_LINK_SPEC): Likewise.
* gcc/config/arm/bpabi.h (TARGET_DEFAULT_MASK): Set according to TARGET_BIG_ENDIAN_DEFAULT.

From-SVN: r129999

5 files changed, 65 insertions, 17 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 806240f..239455d 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,17 @@
+2007-11-07  <aldot@gcc.gnu.org>  Bernhard Fischer
+
+	PR target/16350
+	* config.gcc: For arm*b-* define TARGET_BIG_ENDIAN_DEFAULT.
+	* config/arm/linux-elf.h (TARGET_ENDIAN_DEFAULT): Define based on
+	TARGET_BIG_ENDIAN_DEFAULT.  Use for MULTILIB_DEFAULTS.
+	(TARGET_DEFAULT): Set according to TARGET_ENDIAN_DEFAULT.
+	(LINUX_TARGET_LINK_SPEC): Pass -mlittle-endian on to the assembler.
+	* config/arm/linux-eabi.h (TARGET_LINKER_EMULATION): Set according
+	to TARGET_BIG_ENDIAN_DEFAULT.
+	(SUBTARGET_EXTRA_LINK_SPEC): Likewise.
+	* gcc/config/arm/bpabi.h (TARGET_DEFAULT_MASK): Set according
+	to TARGET_BIG_ENDIAN_DEFAULT.
+
 2007-11-07  Diego Novillo  <dnovillo@google.com>
 
 	* tree.h (struct tree_struct_field_tag): Move field
diff --git a/gcc/config.gcc b/gcc/config.gcc
index a46dbd6..0fc329c 100644
--- a/gcc/config.gcc
+++ b/gcc/config.gcc
@@ -704,6 +704,11 @@ arm*-*-netbsd*)
 	;;
 arm*-*-linux*)			# ARM GNU/Linux with ELF
 	tm_file="dbxelf.h elfos.h linux.h arm/elf.h arm/linux-gas.h arm/linux-elf.h"
+	case $target in
+	arm*b-*)
+		tm_defines="${tm_defines} TARGET_BIG_ENDIAN_DEFAULT=1"
+		;;
+	esac
 	tmake_file="${tmake_file} t-linux arm/t-arm"
 	case ${target} in
 	arm*-*-linux-*eabi)
diff --git a/gcc/config/arm/bpabi.h b/gcc/config/arm/bpabi.h
index 65d28b9..a67f649 100644
--- a/gcc/config/arm/bpabi.h
+++ b/gcc/config/arm/bpabi.h
@@ -29,12 +29,20 @@
 #define TARGET_UNWIND_INFO 1
 
 /* Section 4.1 of the AAPCS requires the use of VFP format.  */
-#undef FPUTYPE_DEFAULT
+#undef  FPUTYPE_DEFAULT
 #define FPUTYPE_DEFAULT FPUTYPE_VFP
 
+/* TARGET_BIG_ENDIAN_DEFAULT is set in
+   config.gcc for big endian configurations.  */
+#if TARGET_BIG_ENDIAN_DEFAULT
+#define TARGET_ENDIAN_DEFAULT MASK_BIG_END
+#else
+#define TARGET_ENDIAN_DEFAULT 0
+#endif
+
 /* EABI targets should enable interworking by default.  */
-#undef TARGET_DEFAULT
-#define TARGET_DEFAULT MASK_INTERWORK
+#undef  TARGET_DEFAULT
+#define TARGET_DEFAULT (MASK_INTERWORK | TARGET_ENDIAN_DEFAULT)
 
 /* The ARM BPABI functions return a boolean; they use no special
    calling convention.  */
@@ -44,11 +52,11 @@
 #define TARGET_LIB_INT_CMP_BIASED !TARGET_BPABI
 
 /* Tell the assembler to build BPABI binaries.  */
-#undef SUBTARGET_EXTRA_ASM_SPEC
+#undef  SUBTARGET_EXTRA_ASM_SPEC
 #define SUBTARGET_EXTRA_ASM_SPEC "%{mabi=apcs-gnu|mabi=atpcs:-meabi=gnu;:-meabi=4}"
 
 /* The generic link spec in elf.h does not support shared libraries.  */
-#undef LINK_SPEC
+#undef  LINK_SPEC
 #define LINK_SPEC "%{mbig-endian:-EB} %{mlittle-endian:-EL} "		\
   "%{static:-Bstatic} %{shared:-shared} %{symbolic:-Bsymbolic} "	\
   "-X"
diff --git a/gcc/config/arm/linux-eabi.h b/gcc/config/arm/linux-eabi.h
index f1e34d1..4174d70 100644
--- a/gcc/config/arm/linux-eabi.h
+++ b/gcc/config/arm/linux-eabi.h
@@ -21,7 +21,7 @@
 
 /* On EABI GNU/Linux, we want both the BPABI builtins and the
    GNU/Linux builtins.  */
-#undef TARGET_OS_CPP_BUILTINS
+#undef  TARGET_OS_CPP_BUILTINS
 #define TARGET_OS_CPP_BUILTINS() 		\
   do 						\
     {						\
@@ -32,31 +32,40 @@
 
 /* We default to a soft-float ABI so that binaries can run on all
    target hardware.  */
-#undef TARGET_DEFAULT_FLOAT_ABI
+#undef  TARGET_DEFAULT_FLOAT_ABI
 #define TARGET_DEFAULT_FLOAT_ABI ARM_FLOAT_ABI_SOFT
 
 /* We default to the "aapcs-linux" ABI so that enums are int-sized by
    default.  */
-#undef ARM_DEFAULT_ABI
+#undef  ARM_DEFAULT_ABI
 #define ARM_DEFAULT_ABI ARM_ABI_AAPCS_LINUX
 
 /* Default to armv5t so that thumb shared libraries work.
    The ARM10TDMI core is the default for armv5t, so set
    SUBTARGET_CPU_DEFAULT to achieve this.  */
-#undef SUBTARGET_CPU_DEFAULT
+#undef  SUBTARGET_CPU_DEFAULT
 #define SUBTARGET_CPU_DEFAULT TARGET_CPU_arm10tdmi
 
-#undef SUBTARGET_EXTRA_LINK_SPEC
-#define SUBTARGET_EXTRA_LINK_SPEC " -m armelf_linux_eabi"
+/* TARGET_BIG_ENDIAN_DEFAULT is set in
+   config.gcc for big endian configurations.  */
+#undef  TARGET_LINKER_EMULATION
+#if TARGET_BIG_ENDIAN_DEFAULT
+#define TARGET_LINKER_EMULATION "armelfb_linux_eabi"
+#else
+#define TARGET_LINKER_EMULATION "armelf_linux_eabi"
+#endif
+
+#undef  SUBTARGET_EXTRA_LINK_SPEC
+#define SUBTARGET_EXTRA_LINK_SPEC " -m " TARGET_LINKER_EMULATION
 
 /* Use ld-linux.so.3 so that it will be possible to run "classic"
    GNU/Linux binaries on an EABI system.  */
-#undef GLIBC_DYNAMIC_LINKER
+#undef  GLIBC_DYNAMIC_LINKER
 #define GLIBC_DYNAMIC_LINKER "/lib/ld-linux.so.3"
 
 /* At this point, bpabi.h will have clobbered LINK_SPEC.  We want to
    use the GNU/Linux version, not the generic BPABI version.  */
-#undef LINK_SPEC
+#undef  LINK_SPEC
 #define LINK_SPEC LINUX_TARGET_LINK_SPEC
 
 /* Use the default LIBGCC_SPEC, not the version in linux-elf.h, as we
@@ -65,7 +74,7 @@
 
 /* Clear the instruction cache from `beg' to `end'.  This makes an
    inline system call to SYS_cacheflush.  */
-#undef CLEAR_INSN_CACHE
+#undef  CLEAR_INSN_CACHE
 #define CLEAR_INSN_CACHE(BEG, END)					\
 {									\
   register unsigned long _beg __asm ("a1") = (unsigned long) (BEG);	\
diff --git a/gcc/config/arm/linux-elf.h b/gcc/config/arm/linux-elf.h
index c3ff9c4..54eba14 100644
--- a/gcc/config/arm/linux-elf.h
+++ b/gcc/config/arm/linux-elf.h
@@ -30,12 +30,24 @@
 #undef  TARGET_DEFAULT_FLOAT_ABI
 #define TARGET_DEFAULT_FLOAT_ABI ARM_FLOAT_ABI_HARD
 
+/* TARGET_BIG_ENDIAN_DEFAULT is set in
+   config.gcc for big endian configurations.  */
+#if TARGET_BIG_ENDIAN_DEFAULT
+#define TARGET_ENDIAN_DEFAULT    MASK_BIG_END
+#define TARGET_ENDIAN_OPTION     "mbig-endian"
+#define TARGET_LINKER_EMULATION  "armelfb_linux"
+#else
+#define TARGET_ENDIAN_DEFAULT    0
+#define TARGET_ENDIAN_OPTION     "mlittle-endian"
+#define TARGET_LINKER_EMULATION  "armelf_linux"
+#endif
+
 #undef  TARGET_DEFAULT
-#define TARGET_DEFAULT (0)
+#define TARGET_DEFAULT (TARGET_ENDIAN_DEFAULT)
 
 #define SUBTARGET_CPU_DEFAULT TARGET_CPU_arm6
 
-#define SUBTARGET_EXTRA_LINK_SPEC " -m armelf_linux -p"
+#define SUBTARGET_EXTRA_LINK_SPEC " -m " TARGET_LINKER_EMULATION " -p"
 
 #undef  MULTILIB_DEFAULTS
 #define MULTILIB_DEFAULTS \
@@ -60,7 +72,7 @@
    %{rdynamic:-export-dynamic} \
    %{!dynamic-linker:-dynamic-linker " LINUX_DYNAMIC_LINKER "} \
    -X \
-   %{mbig-endian:-EB}" \
+   %{mbig-endian:-EB} %{mlittle-endian:-EL}" \
    SUBTARGET_EXTRA_LINK_SPEC
 
 #undef  LINK_SPEC