GNU bug report logs - #24311
[PATCH] maint: accommodate LP64 systems

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From: Paul Eggert <eggert <at> cs.ucla.edu>
To: Claude <lamy.claude <at> gmail.com>
Cc: 24311 <at> debbugs.gnu.org
Subject: bug#24311: [bug-diffutils] bug#24311: bug#24311: bug#24311: [PATCH] maint: accommodate LP64 systems
Date: Tue, 30 Aug 2016 07:41:50 -0700

Claude wrote:

> xvasprintf.c: In function 'xvasprintf':
> xvasprintf.c:102:3: error: function might be possible candidate for 'gnu_printf'
> format attribute [-Werror=suggest-attribute=format]
>    if (vasprintf (&result, format, args) < 0)
>    ^

I wouldn't worry about that warning. Either configure without 
--with-gcc-warnings or build with 'make WERROR_CFLAGS='.

> when compiling with cygwin
>
>   CC       xstrtol.o
> In file included from xstrtol.h:22:0,
>                  from xstrtol.c:31:
> ./getopt.h:198:8: error: redefinition of 'struct option'
>  struct option
>         ^

Sounds like your Cygwin configuration is busted somehow. Look in config.log and 
see why 'configure' decided that getopt didn't work on your platform.

> Aren't these tests on $cross_compiling contradictory in configure ?
>
>
>                                                 if test $cross_compiling = no; then
>                               if test "$cross_compiling" = yes; then :
>   { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
> $as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
> as_fn_error $? "cannot run test program while cross compiling
> See \`config.log' for more details" "$LINENO" 5; }
> else
>   cat confdefs.h - <<_ACEOF >conftest.$ac_ext

I don't see any contradiction.

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