Re: Building setup.exe: conflicting declarations of ssize_t

[Christopher Faylor <cgf-use-the-mailinglist-please at cygwin dot com>]

On Sat, Sep 03, 2011 at 10:19:57PM -0400, Ken Brown wrote:
>Building setup.exe fails as follows:
>
>depbase=`echo archive.o | sed 's|[^/]*$|.deps/&|;s|\.o$||'`;\
>        i686-pc-mingw32-g++ -DPACKAGE_NAME=\"setup\" -DPACKAGE_TARNAME=\"setup\" -DPACKAGE_VERSION=\"0\" -DPACKAGE_STRING=\"setup\ 0\" -DPACKAGE_BUGREPORT=\"xxx\" -DPACKAGE_URL=\"\" -DSTDC_HEADERS=1 -DHAVE_SYS_TYPES_H=1 -DHAVE_SYS_STAT_H=1 -DHAVE_STDLIB_H=1 -DHAVE_STRING_H=1 -DHAVE_MEMORY_H=1 -DHAVE_STRINGS_H=1 -DHAVE_INTTYPES_H=1 -DHAVE_STDINT_H=1 -DHAVE_UNISTD_H=1 -DLT_OBJDIR=\".libs/\" -DHAVE_LIBMINGW32=1 -DHAVE_ERRNO_H=1 -DHAVE_STRING=1 -DHAVE_STRING_H=1 -I.  -DLZMA_API_STATIC -I./libgetopt++/include  -Werror -Wall -Wno-uninitialized -Wpointer-arith -Wcomments -Wcast-align -Wwrite-strings -g -O2 -MT archive.o -MD -MP -MF $depbase.Tpo -c -o archive.o archive.cc &&\
>        mv -f $depbase.Tpo $depbase.Po
>In file included from archive.cc:26:0:
>io_stream.h:37:21: error: conflicting declaration ??typedef long int ssize_t??
>/usr/i686-pc-mingw32/sys-root/mingw/include/sys/types.h:118:18: error: ??ssize_t?? has a previous declaration as ??typedef _ssize_t ssize_t??
>
>The conflicting declarations result from the following recent change to the mingw-runtime package:
>
>2011-08-19  Chris Sutcliffe  <xxx>
>
>	* include/sys/types.h (ssize_t): Defined as int as opposed to long.
>
>The following patch enables the build to complete, but I don't know if it's the right way to fix this:
>
>--- io_stream.h.orig    2009-12-18 06:59:54.000000000 -0500
>+++ io_stream.h 2011-09-03 21:14:44.664235000 -0400
>@@ -33,7 +33,7 @@
>  */
>
> //Where is this defined?
>-#if defined(_WIN32) && ! defined(__CYGWIN__)
>+#if defined(_WIN32) && ! defined(__CYGWIN__) && ! defined(HAVE_SYS_TYPES_H)
> typedef signed long ssize_t;
> #endif

That's definitely the wrong approach to fix the problem.

Why not just include sys/types.h in io_stream.h?

cgf