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-rw-r--r--configure.ac5
1 files changed, 5 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac
index 1783887..913fd8b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -47,6 +47,11 @@ XORG_ENABLE_UNIT_TESTS
# Checks for libraries.
AC_CHECK_LIB([m], [rint])
+# Checks for library functions
+# We don't use timingsafe_memcmp, but check to quiet -Wredundant-decls warning
+# from xorg/os.h which will otherwise redefine it.
+AC_CHECK_FUNCS([timingsafe_memcmp])
+
# Store the list of server defined optional extensions in REQUIRED_MODULES
m4_ifndef([XORG_DRIVER_CHECK_EXT],
[m4_fatal([must install xorg-server development files before running autoconf/autogen])])