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patches/gcc/4.2.3/300-fortran-signed-TImode.patch
author "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
Sun Jul 17 22:43:07 2011 +0200 (2011-07-17)
changeset 2893 a8a65758664f
parent 677 3505660ff419
permissions -rw-r--r--
cc/gcc: do not use the core pass-2 to build the baremetal compiler

In case we build a baremetal compiler, use the standard passes:
- core_cc is used to build the C library;
- as such, it is meant to run on build, not host;
- the final compiler is meant to run on host;

As the current final compiler step can not build a baremetal compiler,
call the core backend from the final step.

NB: Currently, newlib is built during the start_files pass, so we have
to have a core compiler by then... Once we can build the baremetal
compiler from the final cc step, then we can move the newlib build to
the proper step, and then get rid of the core pass-1 static compiler...

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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