/usr/src/gcc-5/debian/patches/arm-multilib-defaults.diff is in gcc-5-source 5.5.0-12ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 | # DP: Set MULTILIB_DEFAULTS for ARM multilib builds
Index: b/src/gcc/config.gcc
===================================================================
--- a/src/gcc/config.gcc
+++ b/src/gcc/config.gcc
@@ -3648,10 +3648,18 @@ case "${target}" in
fi
case "$with_float" in
- "" \
- | soft | hard | softfp)
+ "")
# OK
;;
+ soft)
+ tm_defines="${tm_defines} TARGET_CONFIGURED_FLOAT_ABI=0"
+ ;;
+ softfp)
+ tm_defines="${tm_defines} TARGET_CONFIGURED_FLOAT_ABI=1"
+ ;;
+ hard)
+ tm_defines="${tm_defines} TARGET_CONFIGURED_FLOAT_ABI=2"
+ ;;
*)
echo "Unknown floating point type used in --with-float=$with_float" 1>&2
exit 1
@@ -3685,6 +3693,9 @@ case "${target}" in
"" \
| arm | thumb )
#OK
+ if test "$with_mode" = thumb; then
+ tm_defines="${tm_defines} TARGET_CONFIGURED_THUMB_MODE=1"
+ fi
;;
*)
echo "Unknown mode used in --with-mode=$with_mode"
Index: b/src/gcc/config/arm/linux-eabi.h
===================================================================
--- a/src/gcc/config/arm/linux-eabi.h
+++ b/src/gcc/config/arm/linux-eabi.h
@@ -43,7 +43,21 @@
target hardware. If you override this to use the hard-float ABI then
change the setting of GLIBC_DYNAMIC_LINKER_DEFAULT as well. */
#undef TARGET_DEFAULT_FLOAT_ABI
+#ifdef TARGET_CONFIGURED_FLOAT_ABI
+#if TARGET_CONFIGURED_FLOAT_ABI == 2
+#define TARGET_DEFAULT_FLOAT_ABI ARM_FLOAT_ABI_HARD
+#define MULTILIB_DEFAULT_FLOAT_ABI "mfloat-abi=hard"
+#elif TARGET_CONFIGURED_FLOAT_ABI == 1
+#define TARGET_DEFAULT_FLOAT_ABI ARM_FLOAT_ABI_SOFTFP
+#define MULTILIB_DEFAULT_FLOAT_ABI "mfloat-abi=softfp"
+#else
+#define TARGET_DEFAULT_FLOAT_ABI ARM_FLOAT_ABI_SOFT
+#define MULTILIB_DEFAULT_FLOAT_ABI "mfloat-abi=soft"
+#endif
+#else
#define TARGET_DEFAULT_FLOAT_ABI ARM_FLOAT_ABI_SOFT
+#define MULTILIB_DEFAULT_FLOAT_ABI "mfloat-abi=soft"
+#endif
/* We default to the "aapcs-linux" ABI so that enums are int-sized by
default. */
@@ -86,6 +100,28 @@
%{mfloat-abi=soft*:" GLIBC_DYNAMIC_LINKER_SOFT_FLOAT "} \
%{!mfloat-abi=*:" GLIBC_DYNAMIC_LINKER_DEFAULT "}"
+/* Set the multilib defaults according the configuration, needed to
+ let gcc -print-multi-dir do the right thing. */
+
+#if TARGET_BIG_ENDIAN_DEFAULT
+#define MULTILIB_DEFAULT_ENDIAN "mbig-endian"
+#else
+#define MULTILIB_DEFAULT_ENDIAN "mlittle-endian"
+#endif
+
+#ifndef TARGET_CONFIGURED_THUMB_MODE
+#define MULTILIB_DEFAULT_MODE "marm"
+#elif TARGET_CONFIGURED_THUMB_MODE == 1
+#define MULTILIB_DEFAULT_MODE "mthumb"
+#else
+#define MULTILIB_DEFAULT_MODE "marm"
+#endif
+
+#undef MULTILIB_DEFAULTS
+#define MULTILIB_DEFAULTS \
+ { MULTILIB_DEFAULT_MODE, MULTILIB_DEFAULT_ENDIAN, \
+ MULTILIB_DEFAULT_FLOAT_ABI, "mno-thumb-interwork" }
+
/* 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
|