gcc-iwmmx-softfp.patch

GCC3.2.1-GLIBC2.2.5-LINUX2.4.19-RMK7-PXA2交叉编译脚本

diff -uNr gcc-3.2.orig/gcc/config/arm/linux-elf.h gcc-3.2/gcc/config/arm/linux-elf.h
--- gcc-3.2.orig/gcc/config/arm/linux-elf.h	Tue Apr 16 04:27:24 2002
+++ gcc-3.2/gcc/config/arm/linux-elf.h	Mon Apr 21 11:31:52 2003
@@ -32,13 +32,15 @@
 
 /* Default is to use APCS-32 mode.  */
 #undef  TARGET_DEFAULT
-#define TARGET_DEFAULT (ARM_FLAG_APCS_32 | ARM_FLAG_MMU_TRAPS)
+#define TARGET_DEFAULT (ARM_FLAG_SOFT_FLOAT | ARM_FLAG_APCS_32 | ARM_FLAG_MMU_TRAPS)
 
+#undef SUBTARGET_EXTRA_ASM_SPEC
+#define SUBTARGET_EXTRA_ASM_SPEC "%{!mcpu=*:-miwmmxt} %{!mhard-float:-mno-fpu}"
 #define SUBTARGET_EXTRA_LINK_SPEC " -m armelf_linux -p"
 
 #undef  MULTILIB_DEFAULTS
 #define MULTILIB_DEFAULTS \
-	{ "marm", "mlittle-endian", "mhard-float", "mapcs-32", "mno-thumb-interwork" }
+	{ "marm", "mlittle-endian", "msoft-float", "mapcs-32", "mno-thumb-interwork" }
 
 #define CPP_APCS_PC_DEFAULT_SPEC "-D__APCS_32__"
 
@@ -52,7 +54,7 @@
    %{!shared: %{pthread:-lpthread} \
    %{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
@@ -120,4 +122,4 @@
 }
 
 #undef  CC1_SPEC
-#define CC1_SPEC "%{profile:-p}"
+#define CC1_SPEC "%{profile:-p} -msoft-float"
diff -uNr gcc-3.2.orig/gcc/config/arm/t-linux gcc-3.2/gcc/config/arm/t-linux
--- gcc-3.2.orig/gcc/config/arm/t-linux	Thu May 17 11:15:49 2001
+++ gcc-3.2/gcc/config/arm/t-linux	Mon Apr 21 13:45:49 2003
@@ -21,3 +21,22 @@
 
 # LIBGCC = stmp-multilib
 # INSTALL_LIBGCC = install-multilib
+
+# We want fine grained libraries, so use the new code to build the
+# floating point emulation libraries.
+FPBIT = fp-bit.c
+DPBIT = dp-bit.c
+
+fp-bit.c: $(srcdir)/config/fp-bit.c
+	echo '#define FLOAT' > fp-bit.c
+	echo '#ifndef __ARMEB__' >> fp-bit.c
+	echo '#define FLOAT_BIT_ORDER_MISMATCH' >> fp-bit.c
+	echo '#endif' >> fp-bit.c
+	cat $(srcdir)/config/fp-bit.c >> fp-bit.c
+
+dp-bit.c: $(srcdir)/config/fp-bit.c
+	echo '#ifndef __ARMEB__' > dp-bit.c
+	echo '#define FLOAT_BIT_ORDER_MISMATCH' >> dp-bit.c
+	echo '#define FLOAT_WORD_ORDER_MISMATCH' >> dp-bit.c
+	echo '#endif' >> dp-bit.c
+	cat $(srcdir)/config/fp-bit.c >> dp-bit.c