yann@1: Note... modified my mjn3 to not conflict with the big endian arm patch.
yann@1: Warning!!!  Only the linux target is aware of TARGET_ENDIAN_DEFAULT.
yann@1: Also changed
yann@1:   #define SUBTARGET_EXTRA_ASM_SPEC "\
yann@1:   %{!mcpu=*:-mcpu=xscale} \
yann@1:   %{mhard-float:-mfpu=fpa} \
yann@1:   %{!mhard-float: %{msoft-float:-mfpu=softfpa} %{!msoft-float:-mfpu=softvfp}}"
yann@1: to
yann@1:   #define SUBTARGET_EXTRA_ASM_SPEC "\
yann@1:   %{mhard-float:-mfpu=fpa} \
yann@1:   %{!mhard-float: %{msoft-float:-mfpu=softfpa} %{!msoft-float:-mfpu=softvfp}}"
yann@1: in gcc/config/arm/linux-elf.h.
yann@1: #
yann@1: # Submitted:
yann@1: #
yann@1: # Dimitry Andric <dimitry@andric.com>, 2004-05-01
yann@1: #
yann@1: # Description:
yann@1: #
yann@1: # Nicholas Pitre released this patch for gcc soft-float support here: 
yann@1: # http://lists.arm.linux.org.uk/pipermail/linux-arm/2003-October/006436.html
yann@1: #
yann@1: # This version has been adapted to work with gcc 3.4.0.
yann@1: #
yann@1: # The original patch doesn't distinguish between softfpa and softvfp modes
yann@1: # in the way Nicholas Pitre probably meant.  His description is:
yann@1: #
yann@1: # "Default is to use APCS-32 mode with soft-vfp.  The old Linux default for
yann@1: # floats can be achieved with -mhard-float or with the configure
yann@1: # --with-float=hard option.  If -msoft-float or --with-float=soft is used then
yann@1: # software float support will be used just like the default but with the legacy
yann@1: # big endian word ordering for double float representation instead."
yann@1: #
yann@1: # Which means the following:
yann@1: #
yann@1: # * If you compile without -mhard-float or -msoft-float, you should get
yann@1: #   software floating point, using the VFP format.  The produced object file
yann@1: #   should have these flags in its header:
yann@1: #
yann@1: #     private flags = 600: [APCS-32] [VFP float format] [software FP]
yann@1: #
yann@1: # * If you compile with -mhard-float, you should get hardware floating point,
yann@1: #   which always uses the FPA format.  Object file header flags should be:
yann@1: #
yann@1: #     private flags = 0: [APCS-32] [FPA float format]
yann@1: #
yann@1: # * If you compile with -msoft-float, you should get software floating point,
yann@1: #   using the FPA format.  This is done for compatibility reasons with many
yann@1: #   existing distributions.  Object file header flags should be:
yann@1: #
yann@1: #     private flags = 200: [APCS-32] [FPA float format] [software FP]
yann@1: #
yann@1: # The original patch from Nicholas Pitre contained the following constructs:
yann@1: #
yann@1: #   #define SUBTARGET_EXTRA_ASM_SPEC "%{!mcpu=*:-mcpu=xscale} \
yann@1: #     %{mhard-float:-mfpu=fpa} \
yann@1: #     %{!mhard-float: %{msoft-float:-mfpu=softfpa;:-mfpu=softvfp}}"
yann@1: #
yann@1: # However, gcc doesn't accept this ";:" notation, used in the 3rd line.  This
yann@1: # is probably the reason Robert Schwebel modified it to:
yann@1: #
yann@1: #   #define SUBTARGET_EXTRA_ASM_SPEC "%{!mcpu=*:-mcpu=xscale} \
yann@1: #     %{mhard-float:-mfpu=fpa} \
yann@1: #     %{!mhard-float: %{msoft-float:-mfpu=softfpa -mfpu=softvfp}}"
yann@1: #
yann@1: # But this causes the following behaviour:
yann@1: #
yann@1: # * If you compile without -mhard-float or -msoft-float, the compiler generates
yann@1: #   software floating point instructions, but *nothing* is passed to the
yann@1: #   assembler, which results in an object file which has flags:
yann@1: #
yann@1: #     private flags = 0: [APCS-32] [FPA float format]
yann@1: #
yann@1: #   This is not correct!
yann@1: #
yann@1: # * If you compile with -mhard-float, the compiler generates hardware floating
yann@1: #   point instructions, and passes "-mfpu=fpa" to the assembler, which results
yann@1: #   in an object file which has the same flags as in the previous item, but now
yann@1: #   those *are* correct.
yann@1: #    
yann@1: # * If you compile with -msoft-float, the compiler generates software floating
yann@1: #   point instructions, and passes "-mfpu=softfpa -mfpu=softvfp" (in that
yann@1: #   order) to the assembler, which results in an object file with flags:
yann@1: #
yann@1: #   private flags = 600: [APCS-32] [VFP float format] [software FP]
yann@1: #
yann@1: #   This is not correct, because the last "-mfpu=" option on the assembler
yann@1: #   command line determines the actual FPU convention used (which should be FPA
yann@1: #   in this case).
yann@1: #
yann@1: # Therefore, I modified this patch to get the desired behaviour.  Every
yann@1: # instance of the notation:
yann@1: #
yann@1: #   %{msoft-float:-mfpu=softfpa -mfpu=softvfp}
yann@1: #
yann@1: # was changed to:
yann@1: #
yann@1: #   %{msoft-float:-mfpu=softfpa} %{!msoft-float:-mfpu=softvfp}
yann@1: #
yann@1: # I also did the following:
yann@1: # 
yann@1: # * Modified all TARGET_DEFAULT macros I could find to include ARM_FLAG_VFP, to
yann@1: #   be consistent with Nicholas' original patch.
yann@1: # * Removed any "msoft-float" or "mhard-float" from all MULTILIB_DEFAULTS
yann@1: #   macros I could find.  I think that if you compile without any options, you
yann@1: #   would like to get the defaults. :)
yann@1: # * Removed the extra -lfloat option from LIBGCC_SPEC, since it isn't needed
yann@1: #   anymore.  (The required functions are now in libgcc.)
yann@1: 
yann@1: diff -urN gcc-3.4.1-old/gcc/config/arm/coff.h gcc-3.4.1/gcc/config/arm/coff.h
yann@1: --- gcc-3.4.1-old/gcc/config/arm/coff.h	2004-02-24 08:25:22.000000000 -0600
yann@1: +++ gcc-3.4.1/gcc/config/arm/coff.h	2004-09-02 21:51:15.000000000 -0500
yann@1: @@ -31,11 +31,16 @@
yann@1:  #define TARGET_VERSION fputs (" (ARM/coff)", stderr)
yann@1:  
yann@1:  #undef  TARGET_DEFAULT
yann@1: -#define TARGET_DEFAULT (ARM_FLAG_SOFT_FLOAT | ARM_FLAG_APCS_32 | ARM_FLAG_APCS_FRAME | ARM_FLAG_MMU_TRAPS)
yann@1: +#define TARGET_DEFAULT		\
yann@1: +	( ARM_FLAG_SOFT_FLOAT	\
yann@1: +	| ARM_FLAG_VFP		\
yann@1: +	| ARM_FLAG_APCS_32	\
yann@1: +	| ARM_FLAG_APCS_FRAME	\
yann@1: +	| ARM_FLAG_MMU_TRAPS )
yann@1:  
yann@1:  #ifndef MULTILIB_DEFAULTS
yann@1:  #define MULTILIB_DEFAULTS \
yann@1: -  { "marm", "mlittle-endian", "msoft-float", "mapcs-32", "mno-thumb-interwork" }
yann@1: +  { "marm", "mlittle-endian", "mapcs-32", "mno-thumb-interwork" }
yann@1:  #endif
yann@1:  
yann@1:  /* This is COFF, but prefer stabs.  */
yann@1: diff -urN gcc-3.4.1-old/gcc/config/arm/elf.h gcc-3.4.1/gcc/config/arm/elf.h
yann@1: --- gcc-3.4.1-old/gcc/config/arm/elf.h	2004-02-24 08:25:22.000000000 -0600
yann@1: +++ gcc-3.4.1/gcc/config/arm/elf.h	2004-09-02 21:51:15.000000000 -0500
yann@1: @@ -46,7 +46,9 @@
yann@1:  
yann@1:  #ifndef SUBTARGET_ASM_FLOAT_SPEC
yann@1:  #define SUBTARGET_ASM_FLOAT_SPEC "\
yann@1: -%{mapcs-float:-mfloat} %{msoft-float:-mfpu=softfpa}"
yann@1: +%{mapcs-float:-mfloat} \
yann@1: +%{mhard-float:-mfpu=fpa} \
yann@1: +%{!mhard-float: %{msoft-float:-mfpu=softfpa} %{!msoft-float:-mfpu=softvfp}}"
yann@1:  #endif
yann@1:  
yann@1:  #ifndef ASM_SPEC
yann@1: @@ -106,12 +108,17 @@
yann@1:  #endif
yann@1:  
yann@1:  #ifndef TARGET_DEFAULT
yann@1: -#define TARGET_DEFAULT (ARM_FLAG_SOFT_FLOAT | ARM_FLAG_APCS_32 | ARM_FLAG_APCS_FRAME | ARM_FLAG_MMU_TRAPS)
yann@1: +#define TARGET_DEFAULT		\
yann@1: +	( ARM_FLAG_SOFT_FLOAT	\
yann@1: +	| ARM_FLAG_VFP		\
yann@1: +	| ARM_FLAG_APCS_32	\
yann@1: +	| ARM_FLAG_APCS_FRAME	\
yann@1: +	| ARM_FLAG_MMU_TRAPS )
yann@1:  #endif
yann@1:  
yann@1:  #ifndef MULTILIB_DEFAULTS
yann@1:  #define MULTILIB_DEFAULTS \
yann@1: -  { "marm", "mlittle-endian", "msoft-float", "mapcs-32", "mno-thumb-interwork", "fno-leading-underscore" }
yann@1: +  { "marm", "mlittle-endian", "mapcs-32", "mno-thumb-interwork", "fno-leading-underscore" }
yann@1:  #endif
yann@1:  
yann@1:  #define TARGET_ASM_FILE_START_APP_OFF true
yann@1: diff -urN gcc-3.4.1-old/gcc/config/arm/linux-elf.h gcc-3.4.1/gcc/config/arm/linux-elf.h
yann@1: --- gcc-3.4.1-old/gcc/config/arm/linux-elf.h	2004-09-02 21:50:52.000000000 -0500
yann@1: +++ gcc-3.4.1/gcc/config/arm/linux-elf.h	2004-09-02 22:00:49.000000000 -0500
yann@1: @@ -44,12 +44,26 @@
yann@1:  #define TARGET_LINKER_EMULATION "armelf_linux"
yann@1:  #endif
yann@1:  
yann@1: -/* Default is to use APCS-32 mode.  */
yann@1: +/*
yann@1: + * Default is to use APCS-32 mode with soft-vfp.
yann@1: + * The old Linux default for floats can be achieved with -mhard-float
yann@1: + * or with the configure --with-float=hard option.
yann@1: + * If -msoft-float or --with-float=soft is used then software float 
yann@1: + * support will be used just like the default but with the legacy
yann@1: + * big endian word ordering for double float representation instead.
yann@1: + */
yann@1:  #undef  TARGET_DEFAULT
yann@1: -#define TARGET_DEFAULT \
yann@1: -		( ARM_FLAG_APCS_32 | \
yann@1: -		  ARM_FLAG_MMU_TRAPS | \
yann@1: -		  TARGET_ENDIAN_DEFAULT )
yann@1: +#define TARGET_DEFAULT		\
yann@1: +	( ARM_FLAG_APCS_32	\
yann@1: +	| ARM_FLAG_SOFT_FLOAT	\
yann@1: +	| TARGET_ENDIAN_DEFAULT	\
yann@1: +	| ARM_FLAG_VFP		\
yann@1: +	| ARM_FLAG_MMU_TRAPS )
yann@1: +
yann@1: +#undef  SUBTARGET_EXTRA_ASM_SPEC
yann@1: +#define SUBTARGET_EXTRA_ASM_SPEC "\
yann@1: +%{mhard-float:-mfpu=fpa} \
yann@1: +%{!mhard-float: %{msoft-float:-mfpu=softfpa} %{!msoft-float:-mfpu=softvfp}}"
yann@1:  
yann@1:  #define SUBTARGET_CPU_DEFAULT TARGET_CPU_arm6
yann@1:  
yann@1: @@ -57,7 +71,7 @@
yann@1:  
yann@1:  #undef  MULTILIB_DEFAULTS
yann@1:  #define MULTILIB_DEFAULTS \
yann@1: -	{ "marm", TARGET_ENDIAN_OPTION, "mhard-float", "mapcs-32", "mno-thumb-interwork" }
yann@1: +	{ "marm", TARGET_ENDIAN_OPTION, "mapcs-32", "mno-thumb-interwork" }
yann@1:  
yann@1:  #define CPP_APCS_PC_DEFAULT_SPEC "-D__APCS_32__"
yann@1:  
yann@1: @@ -72,7 +86,7 @@
yann@1:     %{shared:-lc} \
yann@1:     %{!shared:%{profile:-lc_p}%{!profile:-lc}}"
yann@1:  
yann@1: -#define LIBGCC_SPEC "%{msoft-float:-lfloat} -lgcc"
yann@1: +#define LIBGCC_SPEC "-lgcc"
yann@1:  
yann@1:  /* Provide a STARTFILE_SPEC appropriate for GNU/Linux.  Here we add
yann@1:     the GNU/Linux magical crtbegin.o file (see crtstuff.c) which
yann@1: diff -urN gcc-3.4.1-old/gcc/config/arm/t-linux gcc-3.4.1/gcc/config/arm/t-linux
yann@1: --- gcc-3.4.1-old/gcc/config/arm/t-linux	2003-09-20 16:09:07.000000000 -0500
yann@1: +++ gcc-3.4.1/gcc/config/arm/t-linux	2004-09-02 21:51:15.000000000 -0500
yann@1: @@ -4,7 +4,10 @@
yann@1:  LIBGCC2_DEBUG_CFLAGS = -g0
yann@1:  
yann@1:  LIB1ASMSRC = arm/lib1funcs.asm
yann@1: -LIB1ASMFUNCS = _udivsi3 _divsi3 _umodsi3 _modsi3 _dvmd_lnx
yann@1: +LIB1ASMFUNCS = _udivsi3 _divsi3 _umodsi3 _modsi3 _dvmd_lnx \
yann@1: +	_negdf2 _addsubdf3 _muldivdf3 _cmpdf2 _unorddf2 _fixdfsi _fixunsdfsi \
yann@1: +	_truncdfsf2 _negsf2 _addsubsf3 _muldivsf3 _cmpsf2 _unordsf2 \
yann@1: +	_fixsfsi _fixunssfsi
yann@1:  
yann@1:  # MULTILIB_OPTIONS = mhard-float/msoft-float
yann@1:  # MULTILIB_DIRNAMES = hard-float soft-float
yann@1: diff -urN gcc-3.4.1-old/gcc/config/arm/unknown-elf.h gcc-3.4.1/gcc/config/arm/unknown-elf.h
yann@1: --- gcc-3.4.1-old/gcc/config/arm/unknown-elf.h	2004-02-24 08:25:22.000000000 -0600
yann@1: +++ gcc-3.4.1/gcc/config/arm/unknown-elf.h	2004-09-02 21:51:15.000000000 -0500
yann@1: @@ -30,7 +30,12 @@
yann@1:  
yann@1:  /* Default to using APCS-32 and software floating point.  */
yann@1:  #ifndef TARGET_DEFAULT
yann@1: -#define TARGET_DEFAULT	(ARM_FLAG_SOFT_FLOAT | ARM_FLAG_APCS_32 | ARM_FLAG_APCS_FRAME | ARM_FLAG_MMU_TRAPS)
yann@1: +#define TARGET_DEFAULT		\
yann@1: +	( ARM_FLAG_SOFT_FLOAT	\
yann@1: +	| ARM_FLAG_VFP		\
yann@1: +	| ARM_FLAG_APCS_32	\
yann@1: +	| ARM_FLAG_APCS_FRAME	\
yann@1: +	| ARM_FLAG_MMU_TRAPS )
yann@1:  #endif
yann@1:  
yann@1:  /* Now we define the strings used to build the spec file.  */
yann@1: diff -urN gcc-3.4.1-old/gcc/config/arm/xscale-elf.h gcc-3.4.1/gcc/config/arm/xscale-elf.h
yann@1: --- gcc-3.4.1-old/gcc/config/arm/xscale-elf.h	2003-07-01 18:26:43.000000000 -0500
yann@1: +++ gcc-3.4.1/gcc/config/arm/xscale-elf.h	2004-09-02 21:51:15.000000000 -0500
yann@1: @@ -49,11 +49,12 @@
yann@1:  		     endian, regardless of the endian-ness of the memory
yann@1:  		     system.  */
yann@1:  		     
yann@1: -#define SUBTARGET_EXTRA_ASM_SPEC "%{!mcpu=*:-mcpu=xscale} \
yann@1: -  %{mhard-float:-mfpu=fpa} \
yann@1: -  %{!mhard-float: %{msoft-float:-mfpu=softfpa;:-mfpu=softvfp}}"
yann@1: +#define SUBTARGET_EXTRA_ASM_SPEC "\
yann@1: +%{!mcpu=*:-mcpu=xscale} \
yann@1: +%{mhard-float:-mfpu=fpa} \
yann@1: +%{!mhard-float: %{msoft-float:-mfpu=softfpa} %{!msoft-float:-mfpu=softvfp}}"
yann@1:  
yann@1:  #ifndef MULTILIB_DEFAULTS
yann@1:  #define MULTILIB_DEFAULTS \
yann@1: -  { "mlittle-endian", "mno-thumb-interwork", "marm", "msoft-float" }
yann@1: +  { "mlittle-endian", "mno-thumb-interwork", "marm" }
yann@1:  #endif