crosstool-ng: patches/gcc/4.2.4/241-arm-bigendian2.patch@9e2761e59a75

debug/cross-gdb: check host dependencies

Cross-gdb depends on expat and python. If either is missing, cross-gdb will
build successfully, but lacking some features.

Especially, if expat is missing, cross-gdb will be unable to parse the target
description, which may lead to runtime malfunctions and the following GDB
warning:
"Can not parse XML target description; XML support was disabled at compile time"

Hence, expat should be considered mandatory.

On the other hand, the features missing without python are not critical, so
python should not be considered mandatory.

This patch does the following:
- At configure time, warn the user if either expat or python is missing.
- In menuconfig, disable the static build options regarding cross-gdb if no
static version of expat is available, and disable cross-gdb if expat is
missing.

Signed-off-by: "Benoît THÉBAUDEAU" <benoit.thebaudeau@advansee.com>
[yann.morin.1998@anciens.enib.fr: add comment for impossible static cross-gdb]
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>

     1 Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org> wrote:

     3 I tried to use crosstool-ng to generate a toolchain for Linux on big

     4 endian arm with recent versions of gcc, glibc, etc... but had a few

     5 problems.

     7 It appears that the gcc patch (for gcc 4.2.x)

     8 for big-endian arm (240-arm-bigendian.patch) lacks the change attached

     9 to this mail as 240-arm-bigendian2.patch.

    11 --- gcc-4.2.4/gcc/config/arm/bpabi.h~	2007-09-01 17:28:30.000000000 +0200

    12 +++ gcc-4.2.4/gcc/config/arm/bpabi.h	2009-01-05 19:19:10.000000000 +0100

    13 @@ -32,9 +32,19 @@

    14  #undef FPUTYPE_DEFAULT

    15  #define FPUTYPE_DEFAULT FPUTYPE_VFP

    17 +/*

    18 + * 'config.gcc' defines TARGET_BIG_ENDIAN_DEFAULT as 1 for arm*b-*

    19 + * (big endian) configurations.

    20 + */

    21 +#if TARGET_BIG_ENDIAN_DEFAULT

    22 +#define TARGET_ENDIAN_DEFAULT MASK_BIG_END

    23 +#else

    24 +#define TARGET_ENDIAN_DEFAULT 0

    25 +#endif

    26 +

    27  /* EABI targets should enable interworking by default.  */

    28  #undef TARGET_DEFAULT

    29 -#define TARGET_DEFAULT MASK_INTERWORK

    30 +#define TARGET_DEFAULT (MASK_INTERWORK | TARGET_ENDIAN_DEFAULT)

    32  /* The ARM BPABI functions return a boolean; they use no special

    33     calling convention.  */

author	"Benoît THÉBAUDEAU" <benoit.thebaudeau@advansee.com>
	Wed Jun 08 15:47:43 2011 +0200 (2011-06-08)
changeset 2508	9e2761e59a75
permissions	-rw-r--r--