Restore gl_GLIBC21 to configure; needed for libcharset

diff --git a/configure.ac b/configure.ac
index 9e55ff5..c6391af 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -878,6 +878,7 @@ AC_STRUCT_DIRENT_D_TYPE
 AM_LANGINFO_CODESET
 AC_CHECK_HEADERS([stddef.h stdlib.h string.h])
 AC_CHECK_FUNCS(setlocale)
+gl_GLIBC21
 
 # check additional type sizes
 AC_CHECK_SIZEOF(size_t)