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-rw-r--r--configure.ac2
1 files changed, 1 insertions, 1 deletions
diff --git a/configure.ac b/configure.ac
index 59333d1..97fd090 100644
--- a/configure.ac
+++ b/configure.ac
@@ -140,7 +140,7 @@ AC_CHECK_FUNCS([strdup strndup mkstemp mktemp fdopen fileno \
dup dup2 getcwd realpath sigsetmask sigaction \
getgroups seteuid setegid setlinebuf setreuid setregid \
getrlimit setrlimit setvbuf pipe strerror strsignal \
- lstat readlink atexit])
+ lstat readlink atexit isatty ttyname])
# We need to check declarations, not just existence, because on Tru64 this
# function is not declared without special flags, which themselves cause