X-Git-Url: https://ruderich.org/simon/gitweb/?p=coloredstderr%2Fcoloredstderr.git;a=blobdiff_plain;f=configure.ac;h=4b513c3366de705a4486ad6ef77f989e0c09fbb0;hp=a96edb40a419d394c41d8b28c12caede103c2422;hb=08e732449774e01a681684b0c48e5e1ef4969709;hpb=941370dda9f22ca42e1d5b3cd580d7e7091d40bc

diff --git a/configure.ac b/configure.ac
index a96edb4..4b513c3 100644
--- a/configure.ac
+++ b/configure.ac
@@ -56,6 +56,10 @@ AC_FUNC_FORK
 AC_CHECK_FUNCS([memmove setenv],
                [],[AC_MSG_ERROR([function is required])])
 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])