Re: error compiling regex gnulib module with pgcc compiler

[Paul Eggert]

Ralf Wildenhues <address@hidden> writes:

>> Thanks for checking that.  Can you please run the following
>> program on that platform and send us the output?  If it outputs
>> "preprocessor thinks BITSET_WORD_BITS = 64", then we have an
>> obvious fix to regex_internal.h.  Thanks.
>
> Yes

OK, thanks, I installed the following patch into both gnulib and
coreutils.  A pgcc maintainer wrote me that this should be fixed when
version 6.1-2 comes out, so I put that into the comment.

2006-01-10  Paul Eggert  <address@hidden>

        * regex_internal.h (BITSET_WORD_BITS):
        Work around a bug in 64-bit PGC (before version 6.1-2), where the
        preprocessor mishandles large unsigned values as if they were signed.
        Problem reported by Claudio Fontana in
        <http://lists.gnu.org/archive/html/bug-gnulib/2005-12/msg00061.html>.

Index: regex_internal.h
===================================================================
RCS file: /cvsroot/gnulib/gnulib/lib/regex_internal.h,v
retrieving revision 1.19
retrieving revision 1.20
diff -p -u -r1.19 -r1.20
--- regex_internal.h    25 Sep 2005 04:20:16 -0000      1.19
+++ regex_internal.h    10 Jan 2006 20:14:43 -0000      1.20
@@ -1,5 +1,5 @@
 /* Extended regular expression matching and search library.
-   Copyright (C) 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
+   Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Isamu Hasegawa <address@hidden>.
 
@@ -182,6 +182,10 @@ typedef unsigned long int bitset_word;
 # if BITSET_WORD_BITS <= SBC_MAX
 #  error "Invalid SBC_MAX"
 # endif
+ #elif BITSET_WORD_MAX == (0xffffffff + 2) * 0xffffffff
+/* Work around a bug in 64-bit PGC (before version 6.1-2), where the
+   preprocessor mishandles large unsigned values as if they were signed.  */
+# define BITSET_WORD_BITS 64
 #else
 # error "Add case for new bitset_word size"
 #endif