gcc/patches/gcc-4.7-arm-hfp-ldso.patch0

   1 2012-05-01  Richard Earnshaw  <rearnsha@arm.com>
   2
   3         * arm/linux-eabi.h (GLIBC_DYNAMIC_LINKER_DEFAULT): Avoid ifdef
   4         comparing enumeration values.  Update comments.
   5
   6 2012-04-26  Michael Hope  <michael.hope@linaro.org>
   7             Richard Earnshaw  <rearnsha@arm.com>
   8
   9         * config/arm/linux-eabi.h (GLIBC_DYNAMIC_LINKER_SOFT_FLOAT): Define.
  10         (GLIBC_DYNAMIC_LINKER_HARD_FLOAT): Define.
  11         (GLIBC_DYNAMIC_LINKER_DEFAULT): Define.
  12         (GLIBC_DYNAMIC_LINKER): Redefine to use the hard float path.
  13
  14 --- gcc/config/arm/linux-eabi.h (revision 186858)
  15 +++ gcc/config/arm/linux-eabi.h (revision 187012)
  16 @@ -32,7 +32,8 @@
  17    while (false)
  18
  19  /* We default to a soft-float ABI so that binaries can run on all
  20 -   target hardware.  */
  21 +   target hardware.  If you override this to use the hard-float ABI then
  22 +   change the setting of GLIBC_DYNAMIC_LINKER_DEFAULT as well.  */
  23  #undef  TARGET_DEFAULT_FLOAT_ABI
  24  #define TARGET_DEFAULT_FLOAT_ABI ARM_FLOAT_ABI_SOFT
  25
  26 @@ -59,10 +60,23 @@
  27  #undef  SUBTARGET_EXTRA_LINK_SPEC
  28  #define SUBTARGET_EXTRA_LINK_SPEC " -m " TARGET_LINKER_EMULATION
  29
  30 -/* Use ld-linux.so.3 so that it will be possible to run "classic"
  31 -   GNU/Linux binaries on an EABI system.  */
  32 +/* GNU/Linux on ARM currently supports three dynamic linkers:
  33 +   - ld-linux.so.2 - for the legacy ABI
  34 +   - ld-linux.so.3 - for the EABI-derived soft-float ABI
  35 +   - ld-linux-armhf.so.3 - for the EABI-derived hard-float ABI.
  36 +   All the dynamic linkers live in /lib.
  37 +   We default to soft-float, but this can be overridden by changing both
  38 +   GLIBC_DYNAMIC_LINKER_DEFAULT and TARGET_DEFAULT_FLOAT_ABI.  */
  39 +
  40  #undef  GLIBC_DYNAMIC_LINKER
  41 -#define GLIBC_DYNAMIC_LINKER "/lib/ld-linux.so.3"
  42 +#define GLIBC_DYNAMIC_LINKER_SOFT_FLOAT "/lib/ld-linux.so.3"
  43 +#define GLIBC_DYNAMIC_LINKER_HARD_FLOAT "/lib/ld-linux-armhf.so.3"
  44 +#define GLIBC_DYNAMIC_LINKER_DEFAULT GLIBC_DYNAMIC_LINKER_SOFT_FLOAT
  45 +
  46 +#define GLIBC_DYNAMIC_LINKER \
  47 +   "%{mfloat-abi=hard:" GLIBC_DYNAMIC_LINKER_HARD_FLOAT "} \
  48 +    %{mfloat-abi=soft*:" GLIBC_DYNAMIC_LINKER_SOFT_FLOAT "} \
  49 +    %{!mfloat-abi=*:" GLIBC_DYNAMIC_LINKER_DEFAULT "}"
  50
  51  /* At this point, bpabi.h will have clobbered LINK_SPEC.  We want to
  52     use the GNU/Linux version, not the generic BPABI version.  */