--- configure.orig	2017-03-17 10:38:18.549098316 -0400
+++ configure	2017-03-17 10:38:26.499963667 -0400
@@ -8673,7 +8673,7 @@
 
 if test "${GCC}" = "yes"
 then
-   CYTHON_CFLAGS="-Wno-parentheses -Wno-unused -Wno-format -fno-strict-aliasing -U_POSIX_C_SOURCE -U_XOPEN_SOURCE"
+   CYTHON_CFLAGS="-Wno-parentheses -Wno-unused -fno-strict-aliasing -U_POSIX_C_SOURCE -U_XOPEN_SOURCE"
 else
    case "${host_os}"
    in