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Use runtime wcwidth() to check libc

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We've been using #ifdefs and such to check for libc
Unicode 13 support at compile time. Instead, execute
a wcwidth() using a sextant. If it comes back -1, the
libc lacks support; disable sextants. Otherwise, let
it go. This ought allow us to support sextants on BSD
as soon as it has support; it furthermore allows us to
properly disable them on Linuxes lacking such support.
Closes #1289.
This commit is contained in:
nick black 2021-01-14 15:55:46 -05:00
parent fa3c17abb9
commit 5a1df02f01
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1 changed files with 4 additions and 4 deletions
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8
src/lib/terminfo.c
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@ -59,10 +59,10 @@ apply_term_heuristics(tinfo* ti, const char* termname){
}else if(strstr(termname, "vte") || strstr(termname, "gnome")){
ti->sextants = true; // VTE has long enjoyed good sextant support
}
// as of freebsd 12.1 / dragonfly 5.9, there's no libc support for sextants
#if defined(__FreeBSD__) || defined(__DragonFly__)
ti->sextants = false;
#endif
// run a wcwidth() to guarantee libc Unicode 13 support
if(wcwidth(L'🬸') < 0){
ti->sextants = false;
}
return 0;
}