mkvtoolnix/ac/nl_langinfo.m4

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dnl
dnl Check for nl_langinfo or at least locale_charset
dnl
if test x"$MINGW" != "x1" ; then
AC_MSG_CHECKING(for nl_langinfo)
AC_CACHE_VAL(ac_cv_has_nl_langinfo,[
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <langinfo.h>
]], [[nl_langinfo(CODESET);]])],
[ac_cv_has_nl_langinfo=yes],
[ac_cv_has_nl_langinfo=no])
])
AC_MSG_RESULT($ac_cv_has_nl_langinfo)
if test x"$ac_cv_has_nl_langinfo" = "xyes" ; then
AC_DEFINE(HAVE_NL_LANGINFO, 1, [nl_langinfo is available])
else
AC_MSG_CHECKING(for locale_charset)
AC_CACHE_VAL(ac_cv_has_locale_charset,[
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <libcharset.h>
]], [[locale_charset();]])],
[ac_cv_has_locale_charset=yes],
[ac_cv_has_locale_charset=no])
])
AC_MSG_RESULT($ac_cv_has_locale_charset)
if test x"$ac_cv_has_locale_charset" = "xyes" ; then
AC_DEFINE(HAVE_LOCALE_CHARSET, 1, [locale_charset is available])
else
echo '*** Your system has neither nl_langinfo nor locale_charset.'
echo '*** Please install libcharset which is part of libiconv'
echo '*** available at http://www.gnu.org/software/libiconv/'
exit 1
fi
fi
fi