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gcc-4.7: Add knowledge about arm hf dynamic loader

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(From OE-Core rev: a0d9e602a778feab2201a0643fb7d555b71017b9)

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Khem Raj
2012-04-30 15:55:34 -07:00
committed by Richard Purdie
parent 49694d650c
commit e108db7acc
2 changed files with 49 additions and 0 deletions
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meta/recipes-devtools/gcc/gcc-4.7.inc
+1
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@@ -65,6 +65,7 @@ SRC_URI = "svn://gcc.gnu.org/svn/gcc/branches;module=${BRANCH};proto=http \
file://libgcc-sjlj-check.patch \
file://cpp-honor-sysroot.patch \
file://mips64-default-n64.patch \
file://arm-hard-float-loader.patch \
"
S = "${TMPDIR}/work-shared/gcc-${PV}-${PR}/${BRANCH}"
meta/recipes-devtools/gcc/gcc-4.7/arm-hard-float-loader.patch
+48
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@@ -0,0 +1,48 @@
This patch is still being discussed by probably is almost
final version. We add the OE notion of multilib on top
Upstream-Status: Backport [ adapted ]
Signed-off-by: Khem Raj <raj.khem@gmail.com>
Index: gcc-4_7-branch/gcc/config/arm/linux-eabi.h
===================================================================
--- gcc-4_7-branch.orig/gcc/config/arm/linux-eabi.h 2012-04-30 15:28:31.891863845 -0700
+++ gcc-4_7-branch/gcc/config/arm/linux-eabi.h 2012-04-30 15:37:11.531888994 -0700
@@ -32,7 +32,8 @@
while (false)
/* We default to a soft-float ABI so that binaries can run on all
- target hardware. */
+ 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
#define TARGET_DEFAULT_FLOAT_ABI ARM_FLOAT_ABI_SOFT
@@ -59,10 +60,23 @@
#undef SUBTARGET_EXTRA_LINK_SPEC
#define SUBTARGET_EXTRA_LINK_SPEC " -m " TARGET_LINKER_EMULATION
-/* Use ld-linux.so.3 so that it will be possible to run "classic"
- GNU/Linux binaries on an EABI system. */
+/* GNU/Linux on ARM currently supports three dynamic linkers:
+ - ld-linux.so.2 - for the legacy ABI
+ - ld-linux.so.3 - for the EABI-derived soft-float ABI
+ - ld-linux-armhf.so.3 - for the EABI-derived hard-float ABI.
+ All the dynamic linkers live in /lib.
+ We default to soft-float, but this can be overridden by changing both
+ GLIBC_DYNAMIC_LINKER_DEFAULT and TARGET_DEFAULT_FLOAT_ABI. */
+
#undef GLIBC_DYNAMIC_LINKER
-#define GLIBC_DYNAMIC_LINKER SYSTEMLIBS_DIR "ld-linux.so.3"
+#define GLIBC_DYNAMIC_LINKER_SOFT_FLOAT SYSTEMLIBS_DIR "ld-linux.so.3"
+#define GLIBC_DYNAMIC_LINKER_HARD_FLOAT SYSTEMLIBS_DIR "ld-linux-armhf.so.3"
+#define GLIBC_DYNAMIC_LINKER_DEFAULT GLIBC_DYNAMIC_LINKER_SOFT_FLOAT
+
+ #define GLIBC_DYNAMIC_LINKER \
+ "%{mfloat-abi=hard:" GLIBC_DYNAMIC_LINKER_HARD_FLOAT "} \
+ %{mfloat-abi=soft*:" GLIBC_DYNAMIC_LINKER_SOFT_FLOAT "} \
+ %{!mfloat-abi=*:" GLIBC_DYNAMIC_LINKER_DEFAULT "}"
/* At this point, bpabi.h will have clobbered LINK_SPEC. We want to
use the GNU/Linux version, not the generic BPABI version. */