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-rw-r--r--configure.ac2
1 files changed, 2 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac
index 1d02fdf79..09a5ad6ad 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1098,6 +1098,8 @@ AC_DEFUN([AC_CHECK_COMPILER_WNOFLAG],
]
)
+AC_CHECK_FLAG(-fsigned-char)
+
AC_CHECK_COMPILER_WNOFLAG(unused-parameter, [int foo(int bar) { return 0; }])
AC_CHECK_COMPILER_WNOFLAG(clobbered)
AC_CHECK_COMPILER_WFLAG(empty-body)