If someone understands the stochastic process whereby GCC decides to
apply this function or not, please let me know.
fi
CFLAGS="${CFLAGS_save}"
-RDC_PROG_CC_WFLAGS([all extra sign-compare undef pointer-arith bad-function-cast cast-align write-strings missing-prototypes volatile-register-var])
+RDC_PROG_CC_WFLAGS([all extra sign-compare undef pointer-arith bad-function-cast cast-align write-strings missing-prototypes volatile-register-var error-implicit-function-declaration])
RDC_PROG_CC_FLAGS_IFELSE([-pipe])
dnl Check for various optimization flags