diff options
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index c14f6562d..247f4f062 100644 --- a/configure.ac +++ b/configure.ac @@ -2266,8 +2266,63 @@ wmemcpy wmemmove wmemset; do ]) AH_TEMPLATE([MULTIBYTE_SUPPORT], [Define to 1 if you want support for multibyte character sets.]) +AH_TEMPLATE([BROKEN_WCWIDTH], +[Define to 1 if the wcwidth() function is present but broken.]) if test x$zsh_cv_c_unicode_support = xyes; then AC_DEFINE(MULTIBYTE_SUPPORT) + + dnl Test for a wcwidth() implementation that gives the wrong width for + dnl zero-width combining characters. + dnl For the test we use a combining acute accent (\u0301). + dnl We input it as UTF-8 since that is the standard we can rely + dnl upon most: we can't rely on a wchar_t being stored as a + dnl Unicode code point on all systems. + dnl The programme returns 0 only if all the conditions for brokenness + dnl are met: + dnl - the programme compiled, linked and ran + dnl - we successfully set a UTF-8 locale + dnl - the locale we set plausibly converted the UTF-8 string + dnl for a zero-width combining character (the only way to be + dnl 100% sure would be to output it and ask if it looked right) + dnl - the converted wide character gave a non-zero width. + dnl locale -a is a fallback; on most systems we should find en_US.UTF-8. + [locale_prog='char *my_locales[] = { + "en_US.UTF-8", "en_GB.UTF-8", "en.UTF-8", ' + locale_prog="$locale_prog"`locale -a 2>/dev/null | \ + sed -e 's/utf8/UTF-8/' | grep UTF-8 | \ + while read line; do echo " \"$line\","; done;` + locale_prog="$locale_prog 0 }; + #define _XOPEN_SOURCE + #include <stdlib.h> + #include <locale.h> + #include <wchar.h> + + int main() { + char **localep; + char comb_acute_mb[] = { (char)0xcc, (char)0x81 }; + wchar_t wc; + + for (localep = my_locales; *localep; localep++) + if (setlocale(LC_ALL, *localep) && + mbtowc(&wc, comb_acute_mb, 2) == 2) + break; + if (!*localep) + return 1; + if (wcwidth(wc) == 0) + return 1; + return 0; + } + "] + + AC_CACHE_CHECK(if the wcwidth() function is broken, + zsh_cv_c_broken_wcwidth, + [AC_TRY_RUN([$locale_prog], + zsh_cv_c_broken_wcwidth=yes, + zsh_cv_c_broken_wcwidth=no, + zsh_cv_c_broken_wcwidth=no)]) + if test x$zsh_cv_c_broken_wcwdith = xyes; then + AC_DEFINE(BROKEN_WCWIDTH) + fi fi dnl |