Re: [PATCH] meson.build: Don't look for libudev for static builds

[Paolo Bonzini <pbonzini@redhat.com>]

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>.

Paolo