-dnl Copyright (C) 2013 Simon Ruderich
+dnl Copyright (C) 2013-2014 Simon Ruderich
dnl
dnl This program is free software: you can redistribute it and/or modify
dnl it under the terms of the GNU General Public License as published by
AC_C_INLINE
AX_C___ATTRIBUTE__
+AX_TLS
AC_CHECK_MEMBER([struct _IO_FILE._fileno],
[AC_DEFINE([HAVE_STRUCT__IO_FILE__FILENO], 1,
AC_CHECK_FUNCS([execvpe])
dnl These are not in POSIX.
AC_CHECK_FUNCS([fwrite_unlocked fputs_unlocked fputc_unlocked])
+dnl Internal functions in libc implementations which must be hooked.
+AC_CHECK_FUNCS([__overflow __swbuf])
dnl Thanks to gperftools' configure.ac (https://code.google.com/p/gperftools).
AC_MSG_CHECKING([for __builtin_expect])
AC_CONFIG_FILES([Makefile src/Makefile tests/Makefile])
AC_OUTPUT
+
+if test x"$ac_cv_tls" = x"none"; then
+ AC_MSG_WARN([thread-local storage not supported by compiler, \
+possible race condition in threaded programs])
+fi