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2012-05-01 Richard Earnshaw <rearnsha@arm.com>
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* arm/linux-eabi.h (GLIBC_DYNAMIC_LINKER_DEFAULT): Avoid ifdef
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comparing enumeration values. Update comments.
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2012-04-26 Michael Hope <michael.hope@linaro.org>
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Richard Earnshaw <rearnsha@arm.com>
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* config/arm/linux-eabi.h (GLIBC_DYNAMIC_LINKER_SOFT_FLOAT): Define.
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(GLIBC_DYNAMIC_LINKER_HARD_FLOAT): Define.
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(GLIBC_DYNAMIC_LINKER_DEFAULT): Define.
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(GLIBC_DYNAMIC_LINKER): Redefine to use the hard float path.
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--- gcc/config/arm/linux-eabi.h (revision 186858)
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+++ gcc/config/arm/linux-eabi.h (revision 187012)
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@@ -32,7 +32,8 @@
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while (false)
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/* We default to a soft-float ABI so that binaries can run on all
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- target hardware. */
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+ target hardware. If you override this to use the hard-float ABI then
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+ change the setting of GLIBC_DYNAMIC_LINKER_DEFAULT as well. */
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#undef TARGET_DEFAULT_FLOAT_ABI
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#define TARGET_DEFAULT_FLOAT_ABI ARM_FLOAT_ABI_SOFT
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@@ -59,10 +60,23 @@
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#undef SUBTARGET_EXTRA_LINK_SPEC
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#define SUBTARGET_EXTRA_LINK_SPEC " -m " TARGET_LINKER_EMULATION
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-/* Use ld-linux.so.3 so that it will be possible to run "classic"
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- GNU/Linux binaries on an EABI system. */
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+/* GNU/Linux on ARM currently supports three dynamic linkers:
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+ - ld-linux.so.2 - for the legacy ABI
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+ - ld-linux.so.3 - for the EABI-derived soft-float ABI
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+ - ld-linux-armhf.so.3 - for the EABI-derived hard-float ABI.
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+ All the dynamic linkers live in /lib.
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+ We default to soft-float, but this can be overridden by changing both
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+ GLIBC_DYNAMIC_LINKER_DEFAULT and TARGET_DEFAULT_FLOAT_ABI. */
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+
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#undef GLIBC_DYNAMIC_LINKER
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-#define GLIBC_DYNAMIC_LINKER "/lib/ld-linux.so.3"
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+#define GLIBC_DYNAMIC_LINKER_SOFT_FLOAT "/lib/ld-linux.so.3"
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+#define GLIBC_DYNAMIC_LINKER_HARD_FLOAT "/lib/ld-linux-armhf.so.3"
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+#define GLIBC_DYNAMIC_LINKER_DEFAULT GLIBC_DYNAMIC_LINKER_SOFT_FLOAT
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+
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+#define GLIBC_DYNAMIC_LINKER \
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+ "%{mfloat-abi=hard:" GLIBC_DYNAMIC_LINKER_HARD_FLOAT "} \
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+ %{mfloat-abi=soft*:" GLIBC_DYNAMIC_LINKER_SOFT_FLOAT "} \
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+ %{!mfloat-abi=*:" GLIBC_DYNAMIC_LINKER_DEFAULT "}"
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/* At this point, bpabi.h will have clobbered LINK_SPEC. We want to
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use the GNU/Linux version, not the generic BPABI version. */
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