Needed for asprintf. https://bugs.gentoo.org/870676 --- a/configure.in +++ b/configure.in @@ -8,6 +8,8 @@ AC_PROG_CC AC_PROG_RANLIB AC_PROG_INSTALL +AC_USE_SYSTEM_EXTENSIONS + dnl Checks for libraries. AC_CHECK_LIB(crypt, crypt) AC_CHECK_LIB(nsl, gethostbyname)