X-Git-Url: https://ruderich.org/simon/gitweb/?p=coloredstderr%2Fcoloredstderr.git;a=blobdiff_plain;f=configure.ac;h=4b513c3366de705a4486ad6ef77f989e0c09fbb0;hp=b4ea8f21a8b54ad18d97b7dc0659b5ad705407db;hb=08e732449774e01a681684b0c48e5e1ef4969709;hpb=4eb55ac0718d1789c31157a1e72c3b7fc034e692

diff --git a/configure.ac b/configure.ac
index b4ea8f2..4b513c3 100644
--- a/configure.ac
+++ b/configure.ac
@@ -58,6 +58,8 @@ AC_CHECK_FUNCS([memmove setenv],
 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])