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-rw-r--r--gdb/configure.ac2
1 files changed, 1 insertions, 1 deletions
diff --git a/gdb/configure.ac b/gdb/configure.ac
index 821dffe2db3..88bd8a653af 100644
--- a/gdb/configure.ac
+++ b/gdb/configure.ac
@@ -796,7 +796,7 @@ AC_FUNC_VFORK
AC_CHECK_FUNCS([canonicalize_file_name realpath getrusage getuid \
getgid poll pread64 sbrk setpgid setpgrp setsid \
sigaction sigprocmask sigsetmask socketpair syscall \
- ttrace wborder setlocale iconvlist libiconvlist])
+ ttrace wborder setlocale iconvlist libiconvlist btowc])
AM_LANGINFO_CODESET
# Check the return and argument types of ptrace. No canned test for