Re: Texinfo 7.2.90 build with mingw.org's MinGW: Gnulib

> Date: Wed, 14 Jan 2026 18:54:53 +0200
> From: Eli Zaretskii <[email protected]>
> Cc: [email protected], [email protected]
> 
> Once configure step succeeded, I ran "make".  I found several
> Gnulib-related problems:
> 
>      gcc -DHAVE_CONFIG_H -I. -I../..   -Id:/usr/include  -Wno-cast-qual -Wno-conversion -Wno-float-equal -Wno-sign-compare -Wno-undef -Wno-unused-function -Wno-unused-parameter -Wno-float-conversion -Wimplicit-fallthrough -Wno-pedantic -Wno-sign-conversion -Wno-type-limits -Wno-unused-const-variable -Wno-unsuffixed-float-constants -Wno-error -O2 -gdwarf-4 -g3 -MT libgnu_a-btowc.o -MD -MP -MF .deps/libgnu_a-btowc.Tpo -c -o libgnu_a-btowc.o `test -f 'btowc.c' || echo './'`btowc.c
>      In file included from ./wctype.h:56,
> 		      from d:\usr\include\wchar.h:62,
> 		      from ./wchar.h:77,
> 		      from btowc.c:21:
>      ./wchar.h:923:1: error: unknown type name 'mbstate_t'
>        923 | _GL_FUNCDECL_RPL (mbsinit, int, (const mbstate_t *ps), );
> 	   | ^~~~~~~~~~~~~~~~
>      In file included from ./wctype.h:56,
> 		      from d:\usr\include\wchar.h:62,
> 		      from ./wchar.h:77,
> 		      from btowc.c:21:
>      ./wchar.h:1135:10: error: unknown type name 'mbstate_t'
>       1135 | mbszero (mbstate_t *ps)
> 	   |          ^~~~~~~~~
>      In file included from ./wctype.h:56,
> 		      from d:\usr\include\wchar.h:62,
> 		      from ./wchar.h:77,
> 		      from btowc.c:21:
>      d:\usr\lib\gcc\mingw32\9.2.0\include\stddef.h:350:23: error: conflicting types for '
>      rpl_wint_t'
>        350 | typedef __WINT_TYPE__ wint_t;
> 	   |                       ^~~~~~
>      ./wchar.h:740:22: note: previous declaration of 'rpl_wint_t' was here
>        740 | typedef unsigned int rpl_wint_t;
> 	   |                      ^~~~~~~~~~
>      In file included from ./wctype.h:56,
> 		      from d:\usr\include\wchar.h:62,
> 		      from ./wchar.h:77,
> 		      from btowc.c:21:
>      d:\usr\include\wchar.h:539:33: error: conflicting types for 'rpl_btowc'
>        539 | __cdecl __MINGW_NOTHROW  wint_t btowc (int);
> 	   |                                 ^~~~~
>      In file included from ./wctype.h:56,
> 		      from d:\usr\include\wchar.h:62,
> 		      from ./wchar.h:77,
> 		      from btowc.c:21:
>      ./wchar.h:869:1: note: previous declaration of 'rpl_btowc' was here
>        869 | _GL_FUNCDECL_RPL (btowc, wint_t, (int c), _GL_ATTRIBUTE_PURE);
> 	   | ^~~~~~~~~~~~~~~~
>      In file included from ./wctype.h:56,
> 		      from d:\usr\include\wchar.h:62,
> 		      from ./wchar.h:77,
> 		      from btowc.c:21:
>      btowc.c:28:1: error: conflicting types for 'rpl_btowc'
> 	28 | btowc (int c)
> 	   | ^~~~~
>      In file included from ./wctype.h:56,
> 		      from d:\usr\include\wchar.h:62,
> 		      from ./wchar.h:77,
> 		      from btowc.c:21:
>      ./wchar.h:869:1: note: previous declaration of 'rpl_btowc' was here
>        869 | _GL_FUNCDECL_RPL (btowc, wint_t, (int c), _GL_ATTRIBUTE_PURE);
> 	   | ^~~~~~~~~~~~~~~~
>      btowc.c: In function 'rpl_btowc':
>      btowc.c:38:7: warning: implicit declaration of function 'mbszero' [-Wimplicit-function-declaration]
> 	38 |       mbszero (&state);
> 	   |       ^~~~~~~
>      Makefile:2934: recipe for target `libgnu_a-btowc.o' failed
>      make[4]: *** [libgnu_a-btowc.o] Error 1
> 
> This is because the MinGW wchar.h includes wctype.h, so we include the
> Gnulib's version of it, and that one then turns around and includes
> wchar.h again.  But because the MinGW wchar.h was not yet completely
> processed, mbstate_t is not yet defined.
> 
> I don't know how to solve this cleanly.  I hope Bruno will know.  The
> kludge I used was not to include wchar.h from wctype.h.  The original
> Gnulib's wctype.h includes wchar.h twice:
> 
> #if 1
> /* Solaris 2.5 has a bug: <wchar.h> must be included before <wctype.h>.  */
> # include <wchar.h>
> #endif
> 
> /* Native Windows (mingw, MSVC) have declarations of towupper, towlower, and
>    isw* functions in <ctype.h>, <wchar.h> as well as in <wctype.h>.  Include
>    <ctype.h>, <wchar.h> in advance to avoid rpl_ prefix being added to the
>    declarations.  */
> #if defined _WIN32 && ! defined __CYGWIN__
> # include <ctype.h>
> # include <wchar.h>
> #endif
> 
> I needed to remove both these lines.
> 
> Another Gnulib-related problem was with stdio-consolesafe.c:
> 
>      gcc -DHAVE_CONFIG_H -I. -I../..   -Id:/usr/include  -Wno-cast-qual -Wno-conversion -Wno-float-equal -Wno-sign-compare -Wno-undef -Wno-unused-function -Wno-unused-parameter -Wno-float-conversion -Wimplicit-fallthrough -Wno-pedantic -Wno-sign-conversion -Wno-type-limits -Wno-unused-const-variable -Wno-unsuffixed-float-constants -Wno-error -O2 -gdwarf-4 -g3 -MT libgnu_a-stdio-consolesafe.o -MD -MP -MF .deps/libgnu_a-stdio-consolesafe.Tpo -c -o libgnu_a-stdio-consolesafe.o `test -f 'stdio-consolesafe.c' || echo './'`stdio-consolesafe.c
>      stdio-consolesafe.c:88:1: error: static declaration of 'vasprintf' follows non-static declaration
> 	88 | vasprintf (char **resultp, const char *format, va_list args)
> 	   | ^~~~~~~~~
>      In file included from stdio-consolesafe.c:20:
>      ./stdio.h:2346:1: note: previous declaration of 'vasprintf' was here
>       2346 | _GL_FUNCDECL_SYS (vasprintf, int,
> 	   | ^~~~~~~~~~~~~~~~
> 
> I originally just removed the 'static' qualifier from the version of
> vasprintf included in stdio-consolesafe.c, but that failed the link
> step further down the line, because Gnulib also includes vasprintf.c,
> which the MinGW build compiles and links against.  So, again as a
> temporary kludge, I renamed the vasprintf in stdio-consolesafe.c to
> rpl_vasprintf, and that solved the compilation and link problems.
> Again, I hope Bruno will be able to suggest a clean solution.

Bruno, any suggestions?  Or did I miss your responses?