crosstool-0.38_patches_gcc-4.0.2_gcc-4.0.2-softfloat.patch

做好的交叉编译工具链

Index: crosstool-0.38/patches/gcc-4.0.2/gentoo-gcc-4.0.2-softfloat.patch
===================================================================
--- /dev/null
+++ crosstool-0.38/patches/gcc-4.0.2/gentoo-gcc-4.0.2-softfloat.patch
@@ -0,0 +1,103 @@
+The hunk for gcc/config/arm/t-linux comes from:
+http://gcc.gnu.org/PR14352
+
+The rest is a custom job by Yuri Vasilevski.
+
+The idea here is that we add soft float support into the spec file
+so that we don't have to worry about packages stripping out softfloat
+flags from CFLAGS/CXXFLAGS.
+
+http://bugs.gentoo.org/75585
+
+_NOTE_: This patch has been modified!
+- gcc is patched to generate softvfp gerardless if the user specifies -msoft-float or not
+- this avoids ugly linking errors in "das U-Boot"
+
+Index: gcc-4.0.2/gcc/config/arm/elf.h
+===================================================================
+--- gcc-4.0.2.orig/gcc/config/arm/elf.h
++++ gcc-4.0.2/gcc/config/arm/elf.h
+@@ -45,8 +45,9 @@
+ #endif
+ 
+ #ifndef SUBTARGET_ASM_FLOAT_SPEC
+-#define SUBTARGET_ASM_FLOAT_SPEC "\
+-%{mapcs-float:-mfloat}"
++#define SUBTARGET_ASM_FLOAT_SPEC "%{mapcs-float:-mfloat} \
++  %{mhard-float:-mfpu=fpa} \
++  %{!mhard-float:-mfpu=softvfp}"
+ #endif
+ 
+ #ifndef ASM_SPEC
+@@ -58,8 +59,6 @@
+ %{mapcs-*:-mapcs-%*} \
+ %(subtarget_asm_float_spec) \
+ %{mthumb-interwork:-mthumb-interwork} \
+-%{msoft-float:-mfloat-abi=soft} %{mhard-float:-mfloat-abi=hard} \
+-%{mfloat-abi=*} %{mfpu=*} \
+ %(subtarget_extra_asm_spec)"
+ #endif
+ 
+Index: gcc-4.0.2/gcc/config/arm/linux-elf.h
+===================================================================
+--- gcc-4.0.2.orig/gcc/config/arm/linux-elf.h
++++ gcc-4.0.2/gcc/config/arm/linux-elf.h
+@@ -32,18 +32,22 @@
+ #define NO_IMPLICIT_EXTERN_C
+ 
+ #undef  TARGET_DEFAULT_FLOAT_ABI
+-#define TARGET_DEFAULT_FLOAT_ABI ARM_FLOAT_ABI_HARD
++#define TARGET_DEFAULT_FLOAT_ABI ARM_FLOAT_ABI_SOFT
+ 
+ #undef  TARGET_DEFAULT
+ #define TARGET_DEFAULT (0)
+ 
++#undef  SUBTARGET_EXTRA_ASM_SPEC
++#define SUBTARGET_EXTRA_ASM_SPEC "%{mhard-float:-mfpu=fpa} \
++  %{!mhard-float:-mfpu=softvfp}"
++
+ #define SUBTARGET_CPU_DEFAULT TARGET_CPU_arm6
+ 
+ #define SUBTARGET_EXTRA_LINK_SPEC " -m armelf_linux -p"
+ 
+ #undef  MULTILIB_DEFAULTS
+ #define MULTILIB_DEFAULTS \
+-	{ "marm", "mlittle-endian", "mhard-float", "mno-thumb-interwork" }
++	{ "marm", "mlittle-endian", "msoft-float", "mno-thumb-interwork" }
+ 
+ /* The GNU C++ standard library requires that these macros be defined.  */
+ #undef CPLUSPLUS_CPP_SPEC
+@@ -56,7 +60,7 @@
+    %{shared:-lc} \
+    %{!shared:%{profile:-lc_p}%{!profile:-lc}}"
+ 
+-#define LIBGCC_SPEC "%{msoft-float:-lfloat} %{mfloat-abi=soft*:-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
+@@ -118,7 +122,7 @@
+ 
+ /* NWFPE always understands FPA instructions.  */
+ #undef  FPUTYPE_DEFAULT
+-#define FPUTYPE_DEFAULT FPUTYPE_FPA_EMU3
++#define FPUTYPE_DEFAULT FPUTYPE_VFP
+ 
+ /* Call the function profiler with a given profile label.  */
+ #undef  ARM_FUNCTION_PROFILER
+Index: gcc-4.0.2/gcc/config/arm/t-linux
+===================================================================
+--- gcc-4.0.2.orig/gcc/config/arm/t-linux
++++ gcc-4.0.2/gcc/config/arm/t-linux
+@@ -4,7 +4,10 @@ TARGET_LIBGCC2_CFLAGS = -fomit-frame-poi
+ 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 _floatdidf _floatdisf
+ 
+ # MULTILIB_OPTIONS = mhard-float/msoft-float
+ # MULTILIB_DIRNAMES = hard-float soft-float