On Sat, Oct 3, 2020 at 4:43 PM Paolo Bonzini <pbonzini@redhat.com> wrote:
>
> On 03/10/20 10:29, 罗勇刚(Yonggang Luo) wrote:
> > For some meson script like this:
> > curses = not_found
> > if iconv.found() and not get_option('curses').disabled()
> >   curses_libname_list = ['ncursesw', 'ncurses', 'cursesw', 'pdcurses']
> >   curses_test = '''
> >     #include <locale.h>
> >     #include <curses.h>
> >     #include <wchar.h>
> >     int main(void) {
> >       wchar_t wch = L'w';
> >       setlocale(LC_ALL, "");
> >       resize_term(0, 0);
> >       addwstr(L"wide chars\n");
> >       addnwstr(&wch, 1);
> >       add_wch(WACS_DEGREE);
> >       return 0;
> >     }'''
> >   foreach curses_libname : curses_libname_list
> >       libcurses = dependency(curses_libname,
> >                              required: false,
> >                              method: 'pkg-config',
> >                              static: enable_static)
> >
> >       if not libcurses.found()
> >         dirs = ['/usr/include/ncursesw']
> >         if targetos == 'windows'
> >           dirs = []
> >         endif
> >         libcurses = cc.find_library(curses_libname,
> >                                     required: false,
> >                                     dirs: dirs,
> >                                     static: enable_static)
> >       endif
> >       if libcurses.found()
> >         if cc.links(curses_test, dependencies: [libcurses])
> >           curses = declare_dependency(compile_args:
> > '-DNCURSES_WIDECHAR', dependencies: [libcurses])
> >           break
> >         endif
> >       endif
> >   endforeach
> > endif
> >
> > We also need to define extra  compile_args  '-DNCURSES_WIDECHAR' as the
> > part of dependencies.
>
> You can do that with #define before including <curses.h>.
Yeap, but the  -DNCURSES_WIDECHAR not only used for testing compile of
#include<curses.h> but also
as a dependencies of qemu.
>
> Paolo
>


--
         此致
礼
罗勇刚
Yours
    sincerely,
Yonggang Luo