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patches/gcc/4.2.3/300-fortran-signed-TImode.patch
author "Benoît THÉBAUDEAU" <benoit.thebaudeau@advansee.com>
Wed Jun 08 15:47:43 2011 +0200 (2011-06-08)
changeset 2508 9e2761e59a75
parent 677 3505660ff419
permissions -rw-r--r--
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 Fix building gfortran for ARM.

     2 http://gcc.gnu.org/ml/gcc-patches/2007-05/msg01010.html

     3 ----

     4 

     5 The patch below fixes a crash building libgfortran on arm-linux-gnueabi.

     6 

     7 This target doesn't really have a 128-bit integer type, however it does use 

     8 TImode to represent the return value of certain special ABI defined library 

     9 functions. This results in type_for_size(TImode) being called.

    10 

    11 Because TImode deosn't correspond to any gfortran integer kind 

    12 gfc_type_for_size returns NULL and we segfault shortly after.

    13 

    14 The patch below fixes this by making gfc_type_for_size handle TImode in the 

    15 same way as the C frontend.

    16 

    17 Tested on x86_64-linux and arm-linux-gnueabi.

    18 Applied to trunk.

    19 

    20 Paul

    21 

    22 2007-05-15  Paul Brook  <paul@codesourcery.com>

    23 

    24     gcc/fortran/

    25     * trans-types.c (gfc_type_for_size): Handle signed TImode.

    26 

    27 diff -durN gcc-4.2.3.old/gcc/fortran/trans-types.c gcc-4.2.3/gcc/fortran/trans-types.c

    28 --- gcc-4.2.3.old/gcc/fortran/trans-types.c	2007-08-31 10:27:50.000000000 +0200

    29 +++ gcc-4.2.3/gcc/fortran/trans-types.c	2008-07-17 09:54:20.000000000 +0200

    30 @@ -1799,6 +1799,13 @@

    31  	  if (type && bits == TYPE_PRECISION (type))

    32  	    return type;

    33  	}

    34 +

    35 +	/* Handle TImode as a special case because it is used by some backends

    36 +	   (eg. ARM) even though it is not available for normal use.  */

    37 +#if HOST_BITS_PER_WIDE_INT >= 64

    38 +	if (bits == TYPE_PRECISION (intTI_type_node))

    39 +	  return intTI_type_node;

    40 +#endif

    41      }

    42    else

    43      {
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