Note... modified my mjn3 to not conflict with the big endian arm patch.

Warning!!!  Only the linux target is aware of TARGET_ENDIAN_DEFAULT.

Also changed

  #define SUBTARGET_EXTRA_ASM_SPEC "\

  %{!mcpu=*:-mcpu=xscale} \

  %{mhard-float:-mfpu=fpa} \

  %{!mhard-float: %{msoft-float:-mfpu=softfpa} %{!msoft-float:-mfpu=softvfp}}"

to

  #define SUBTARGET_EXTRA_ASM_SPEC "\

  %{mhard-float:-mfpu=fpa} \

  %{!mhard-float: %{msoft-float:-mfpu=softfpa} %{!msoft-float:-mfpu=softvfp}}"

in gcc/config/arm/linux-elf.h.

#

# Submitted:

#

# Dimitry Andric <dimitry@andric.com>, 2004-05-01

#

# Description:

#

# Nicholas Pitre released this patch for gcc soft-float support here: 

# http://lists.arm.linux.org.uk/pipermail/linux-arm/2003-October/006436.html

#

# This version has been adapted to work with gcc 3.4.0.

#

# The original patch doesn't distinguish between softfpa and softvfp modes

# in the way Nicholas Pitre probably meant.  His description is:

#

# "Default is to use APCS-32 mode with soft-vfp.  The old Linux default for

# floats can be achieved with -mhard-float or with the configure

# --with-float=hard option.  If -msoft-float or --with-float=soft is used then

# software float support will be used just like the default but with the legacy

# big endian word ordering for double float representation instead."

#

# Which means the following:

#

# * If you compile without -mhard-float or -msoft-float, you should get

#   software floating point, using the VFP format.  The produced object file

#   should have these flags in its header:

#

#     private flags = 600: [APCS-32] [VFP float format] [software FP]

#

# * If you compile with -mhard-float, you should get hardware floating point,

#   which always uses the FPA format.  Object file header flags should be:

#

#     private flags = 0: [APCS-32] [FPA float format]

#

# * If you compile with -msoft-float, you should get software floating point,

#   using the FPA format.  This is done for compatibility reasons with many

#   existing distributions.  Object file header flags should be:

#

#     private flags = 200: [APCS-32] [FPA float format] [software FP]

#

# The original patch from Nicholas Pitre contained the following constructs:

#

#   #define SUBTARGET_EXTRA_ASM_SPEC "%{!mcpu=*:-mcpu=xscale} \

#     %{mhard-float:-mfpu=fpa} \

#     %{!mhard-float: %{msoft-float:-mfpu=softfpa;:-mfpu=softvfp}}"

#

# However, gcc doesn't accept this ";:" notation, used in the 3rd line.  This

# is probably the reason Robert Schwebel modified it to:

#

#   #define SUBTARGET_EXTRA_ASM_SPEC "%{!mcpu=*:-mcpu=xscale} \

#     %{mhard-float:-mfpu=fpa} \

#     %{!mhard-float: %{msoft-float:-mfpu=softfpa -mfpu=softvfp}}"

#

# But this causes the following behaviour:

#

# * If you compile without -mhard-float or -msoft-float, the compiler generates

#   software floating point instructions, but *nothing* is passed to the

#   assembler, which results in an object file which has flags:

#

#     private flags = 0: [APCS-32] [FPA float format]

#

#   This is not correct!

#

# * If you compile with -mhard-float, the compiler generates hardware floating

#   point instructions, and passes "-mfpu=fpa" to the assembler, which results

#   in an object file which has the same flags as in the previous item, but now

#   those *are* correct.

#    

# * If you compile with -msoft-float, the compiler generates software floating

#   point instructions, and passes "-mfpu=softfpa -mfpu=softvfp" (in that

#   order) to the assembler, which results in an object file with flags:

#

#   private flags = 600: [APCS-32] [VFP float format] [software FP]

#

#   This is not correct, because the last "-mfpu=" option on the assembler

#   command line determines the actual FPU convention used (which should be FPA

#   in this case).

#

# Therefore, I modified this patch to get the desired behaviour.  Every

# instance of the notation:

#

#   %{msoft-float:-mfpu=softfpa -mfpu=softvfp}

#

# was changed to:

#

#   %{msoft-float:-mfpu=softfpa} %{!msoft-float:-mfpu=softvfp}

#

# I also did the following:

# 

# * Modified all TARGET_DEFAULT macros I could find to include ARM_FLAG_VFP, to

#   be consistent with Nicholas' original patch.

# * Removed any "msoft-float" or "mhard-float" from all MULTILIB_DEFAULTS

#   macros I could find.  I think that if you compile without any options, you

#   would like to get the defaults. :)

# * Removed the extra -lfloat option from LIBGCC_SPEC, since it isn't needed

#   anymore.  (The required functions are now in libgcc.)

diff -urN gcc-3.4.1-old/gcc/config/arm/coff.h gcc-3.4.1/gcc/config/arm/coff.h

--- gcc-3.4.1-old/gcc/config/arm/coff.h	2004-02-24 08:25:22.000000000 -0600

+++ gcc-3.4.1/gcc/config/arm/coff.h	2004-09-02 21:51:15.000000000 -0500

@@ -31,11 +31,16 @@

 #define TARGET_VERSION fputs (" (ARM/coff)", stderr)

 #undef  TARGET_DEFAULT

-#define TARGET_DEFAULT (ARM_FLAG_SOFT_FLOAT | ARM_FLAG_APCS_32 | ARM_FLAG_APCS_FRAME | ARM_FLAG_MMU_TRAPS)

+#define TARGET_DEFAULT		\

+	( ARM_FLAG_SOFT_FLOAT	\

+	| ARM_FLAG_VFP		\

+	| ARM_FLAG_APCS_32	\

+	| ARM_FLAG_APCS_FRAME	\

+	| ARM_FLAG_MMU_TRAPS )

 #ifndef MULTILIB_DEFAULTS

 #define MULTILIB_DEFAULTS \

-  { "marm", "mlittle-endian", "msoft-float", "mapcs-32", "mno-thumb-interwork" }

+  { "marm", "mlittle-endian", "mapcs-32", "mno-thumb-interwork" }

 #endif

 /* This is COFF, but prefer stabs.  */

diff -urN gcc-3.4.1-old/gcc/config/arm/elf.h gcc-3.4.1/gcc/config/arm/elf.h

--- gcc-3.4.1-old/gcc/config/arm/elf.h	2004-02-24 08:25:22.000000000 -0600

+++ gcc-3.4.1/gcc/config/arm/elf.h	2004-09-02 21:51:15.000000000 -0500

@@ -46,7 +46,9 @@

 #ifndef SUBTARGET_ASM_FLOAT_SPEC

 #define SUBTARGET_ASM_FLOAT_SPEC "\

-%{mapcs-float:-mfloat} %{msoft-float:-mfpu=softfpa}"

+%{mapcs-float:-mfloat} \

+%{mhard-float:-mfpu=fpa} \

+%{!mhard-float: %{msoft-float:-mfpu=softfpa} %{!msoft-float:-mfpu=softvfp}}"

 #endif

 #ifndef ASM_SPEC

@@ -106,12 +108,17 @@

 #endif

 #ifndef TARGET_DEFAULT

-#define TARGET_DEFAULT (ARM_FLAG_SOFT_FLOAT | ARM_FLAG_APCS_32 | ARM_FLAG_APCS_FRAME | ARM_FLAG_MMU_TRAPS)

+#define TARGET_DEFAULT		\

+	( ARM_FLAG_SOFT_FLOAT	\

+	| ARM_FLAG_VFP		\

+	| ARM_FLAG_APCS_32	\

+	| ARM_FLAG_APCS_FRAME	\

+	| ARM_FLAG_MMU_TRAPS )

 #endif

 #ifndef MULTILIB_DEFAULTS

 #define MULTILIB_DEFAULTS \

-  { "marm", "mlittle-endian", "msoft-float", "mapcs-32", "mno-thumb-interwork", "fno-leading-underscore" }

+  { "marm", "mlittle-endian", "mapcs-32", "mno-thumb-interwork", "fno-leading-underscore" }

 #endif

 #define TARGET_ASM_FILE_START_APP_OFF true

diff -urN gcc-3.4.1-old/gcc/config/arm/linux-elf.h gcc-3.4.1/gcc/config/arm/linux-elf.h

--- gcc-3.4.1-old/gcc/config/arm/linux-elf.h	2004-09-02 21:50:52.000000000 -0500

+++ gcc-3.4.1/gcc/config/arm/linux-elf.h	2004-09-02 22:00:49.000000000 -0500

@@ -44,12 +44,26 @@

 #define TARGET_LINKER_EMULATION "armelf_linux"

 #endif

-/* Default is to use APCS-32 mode.  */

+/*

+ * Default is to use APCS-32 mode with soft-vfp.

+ * The old Linux default for floats can be achieved with -mhard-float

+ * or with the configure --with-float=hard option.

+ * If -msoft-float or --with-float=soft is used then software float 

+ * support will be used just like the default but with the legacy

+ * big endian word ordering for double float representation instead.

+ */

 #undef  TARGET_DEFAULT

-#define TARGET_DEFAULT \

-		( ARM_FLAG_APCS_32 | \

-		  ARM_FLAG_MMU_TRAPS | \

-		  TARGET_ENDIAN_DEFAULT )

+#define TARGET_DEFAULT		\

+	( ARM_FLAG_APCS_32	\

+	| ARM_FLAG_SOFT_FLOAT	\

+	| TARGET_ENDIAN_DEFAULT	\

+	| ARM_FLAG_VFP		\

+	| ARM_FLAG_MMU_TRAPS )

+

+#undef  SUBTARGET_EXTRA_ASM_SPEC

+#define SUBTARGET_EXTRA_ASM_SPEC "\

+%{mhard-float:-mfpu=fpa} \

+%{!mhard-float: %{msoft-float:-mfpu=softfpa} %{!msoft-float:-mfpu=softvfp}}"

 #define SUBTARGET_CPU_DEFAULT TARGET_CPU_arm6

@@ -57,7 +71,7 @@

 #undef  MULTILIB_DEFAULTS

 #define MULTILIB_DEFAULTS \

-	{ "marm", TARGET_ENDIAN_OPTION, "mhard-float", "mapcs-32", "mno-thumb-interwork" }

+	{ "marm", TARGET_ENDIAN_OPTION, "mapcs-32", "mno-thumb-interwork" }

 #define CPP_APCS_PC_DEFAULT_SPEC "-D__APCS_32__"

@@ -72,7 +86,7 @@

    %{shared:-lc} \

    %{!shared:%{profile:-lc_p}%{!profile:-lc}}"

-#define LIBGCC_SPEC "%{msoft-float:-lfloat} -lgcc"

+#define LIBGCC_SPEC "-lgcc"

 /* Provide a STARTFILE_SPEC appropriate for GNU/Linux.  Here we add

    the GNU/Linux magical crtbegin.o file (see crtstuff.c) which

diff -urN gcc-3.4.1-old/gcc/config/arm/t-linux gcc-3.4.1/gcc/config/arm/t-linux

--- gcc-3.4.1-old/gcc/config/arm/t-linux	2003-09-20 16:09:07.000000000 -0500

+++ gcc-3.4.1/gcc/config/arm/t-linux	2004-09-02 21:51:15.000000000 -0500

@@ -4,7 +4,10 @@

 LIBGCC2_DEBUG_CFLAGS = -g0

 LIB1ASMSRC = arm/lib1funcs.asm

-LIB1ASMFUNCS = _udivsi3 _divsi3 _umodsi3 _modsi3 _dvmd_lnx

+LIB1ASMFUNCS = _udivsi3 _divsi3 _umodsi3 _modsi3 _dvmd_lnx \

+	_negdf2 _addsubdf3 _muldivdf3 _cmpdf2 _unorddf2 _fixdfsi _fixunsdfsi \

+	_truncdfsf2 _negsf2 _addsubsf3 _muldivsf3 _cmpsf2 _unordsf2 \

+	_fixsfsi _fixunssfsi

 # MULTILIB_OPTIONS = mhard-float/msoft-float

 # MULTILIB_DIRNAMES = hard-float soft-float

diff -urN gcc-3.4.1-old/gcc/config/arm/unknown-elf.h gcc-3.4.1/gcc/config/arm/unknown-elf.h

--- gcc-3.4.1-old/gcc/config/arm/unknown-elf.h	2004-02-24 08:25:22.000000000 -0600

+++ gcc-3.4.1/gcc/config/arm/unknown-elf.h	2004-09-02 21:51:15.000000000 -0500

@@ -30,7 +30,12 @@

 /* Default to using APCS-32 and software floating point.  */

 #ifndef TARGET_DEFAULT

-#define TARGET_DEFAULT	(ARM_FLAG_SOFT_FLOAT | ARM_FLAG_APCS_32 | ARM_FLAG_APCS_FRAME | ARM_FLAG_MMU_TRAPS)

+#define TARGET_DEFAULT		\

+	( ARM_FLAG_SOFT_FLOAT	\

+	| ARM_FLAG_VFP		\

+	| ARM_FLAG_APCS_32	\

+	| ARM_FLAG_APCS_FRAME	\

+	| ARM_FLAG_MMU_TRAPS )

 #endif

 /* Now we define the strings used to build the spec file.  */

diff -urN gcc-3.4.1-old/gcc/config/arm/xscale-elf.h gcc-3.4.1/gcc/config/arm/xscale-elf.h

--- gcc-3.4.1-old/gcc/config/arm/xscale-elf.h	2003-07-01 18:26:43.000000000 -0500

+++ gcc-3.4.1/gcc/config/arm/xscale-elf.h	2004-09-02 21:51:15.000000000 -0500

@@ -49,11 +49,12 @@

 		     endian, regardless of the endian-ness of the memory

 		     system.  */

-#define SUBTARGET_EXTRA_ASM_SPEC "%{!mcpu=*:-mcpu=xscale} \

-  %{mhard-float:-mfpu=fpa} \

-  %{!mhard-float: %{msoft-float:-mfpu=softfpa;:-mfpu=softvfp}}"

+#define SUBTARGET_EXTRA_ASM_SPEC "\

+%{!mcpu=*:-mcpu=xscale} \

+%{mhard-float:-mfpu=fpa} \

+%{!mhard-float: %{msoft-float:-mfpu=softfpa} %{!msoft-float:-mfpu=softvfp}}"

 #ifndef MULTILIB_DEFAULTS

 #define MULTILIB_DEFAULTS \

-  { "mlittle-endian", "mno-thumb-interwork", "marm", "msoft-float" }

+  { "mlittle-endian", "mno-thumb-interwork", "marm" }

 #endif