Re: [PATCH v2 03/21] configure: Fixes ncursesw detection under msys2/mingw and enable curses

["Daniel P. Berrangé" <berrange@redhat.com>]

On Wed, Sep 09, 2020 at 08:55:15PM +0800, 罗勇刚(Yonggang Luo) wrote:
> On Wed, Sep 9, 2020 at 8:51 PM Daniel P. Berrangé <berrange@redhat.com>
> wrote:
> 
> > On Wed, Sep 09, 2020 at 05:45:59PM +0800, Yonggang Luo wrote:
> > > The mingw pkg-config are showing following absolute path and contains :
> > as the separator,
> > > so we must handling : properly.
> > >
> > > -D_XOPEN_SOURCE=600 -D_POSIX_C_SOURCE=199506L
> > -IC:/CI-Tools/msys64/mingw64/include/ncursesw:-I/usr/include/ncursesw:
> > > -DNCURSES_WIDECHAR -D_XOPEN_SOURCE=600 -D_POSIX_C_SOURCE=199506L -IC
> > -pipe -lncursesw -lgnurx -ltre -lintl -liconv
> > > -DNCURSES_WIDECHAR -D_XOPEN_SOURCE=600 -D_POSIX_C_SOURCE=199506L -IC
> > -lncursesw
> > > -DNCURSES_WIDECHAR -D_XOPEN_SOURCE=600 -D_POSIX_C_SOURCE=199506L -IC
> > -lcursesw
> > > -DNCURSES_WIDECHAR /CI-Tools/msys64/mingw64/include/ncursesw -pipe
> > -lncursesw -lgnurx -ltre -lintl -liconv
> > > -DNCURSES_WIDECHAR /CI-Tools/msys64/mingw64/include/ncursesw -lncursesw
> > > -DNCURSES_WIDECHAR /CI-Tools/msys64/mingw64/include/ncursesw -lcursesw
> > > -DNCURSES_WIDECHAR -I/usr/include/ncursesw -pipe -lncursesw -lgnurx
> > -ltre -lintl -liconv
> > > -DNCURSES_WIDECHAR -I/usr/include/ncursesw -lncursesw
> > > -DNCURSES_WIDECHAR -I/usr/include/ncursesw -lcursesw
> > >
> > > msys2/mingw lacks the POSIX-required langinfo.h.
> > >
> > > gcc test.c -DNCURSES_WIDECHAR -I/mingw64/include/ncursesw -pipe
> > -lncursesw -lgnurx -ltre -lintl -liconv
> > > test.c:4:10: fatal error: langinfo.h: No such file or directory
> > >     4 | #include <langinfo.h>
> > >       |          ^~~~~~~~~~~~
> > > compilation terminated.
> > >
> > > So we using g_get_codeset instead of nl_langinfo(CODESET)
> > >
> > > Signed-off-by: Yonggang Luo <luoyonggang@gmail.com>
> > > Reviewed-by: Gerd Hoffmann <kraxel@redhat.com>
> > > ---
> > >  configure   |  9 +++------
> > >  ui/curses.c | 10 +++++-----
> > >  2 files changed, 8 insertions(+), 11 deletions(-)
> > >
> > > diff --git a/configure b/configure
> > > index f4f8bc3756..2e6d54e15b 100755
> > > --- a/configure
> > > +++ b/configure
> > > @@ -3653,8 +3653,8 @@ if test "$iconv" = "no" ; then
> > >  fi
> > >  if test "$curses" != "no" ; then
> > >    if test "$mingw32" = "yes" ; then
> > > -    curses_inc_list="$($pkg_config --cflags ncurses 2>/dev/null):"
> > > -    curses_lib_list="$($pkg_config --libs ncurses
> > 2>/dev/null):-lpdcurses"
> > > +    curses_inc_list="$($pkg_config --cflags ncursesw
> > 2>/dev/null):-I/${MSYSTEM,,}/include/ncursesw:"
> > > +    curses_lib_list="$($pkg_config --libs ncursesw
> > 2>/dev/null):-lncursesw"
> >
> > The original code would try  ncurses via pkg-config and if that failed,
> > would
> > falback to pdcurses.
> >
> > The new code tries ncursesw via pkg-config and then tries ncursesw again
> > via manually specified args, and doesn't try  ncurses or pdcurses at all.
> >
> Gotcha, Indeed   $pkg_config --cflags ncurses can find curses on mingw32,
> the problem is onw mingw32 the include path
> have :, so we can not use : as the path sepaerator, for cross-paltform
> reason, which is best for path separator?

I guess it was using ":" because " " might be valid in the file path.

How about using "#" or "%" instead as those should be more unlikely to
clash.


Regards,
Daniel
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