join all_writers built_programs > built_writers || framework_failure_
+# If 'cksum --debug' does not have an optimized CRC32 implementation, no
+# warning will be printed to standard error and the command will succeed.
+grep -E '^#define (GL_CRC_X86_64_PCLMUL|USE_AVX2_CRC32|USE_AVX512_CRC32'\
+'|USE_PCLMUL_CRC32|USE_VMULL_CRC32) 1' "$CONFIG_HEADER" > /dev/null \
+ || expected_failure_status_cksum=0
+
+# Likewise for 'wc -l --debug'.
+grep -E '^#define (USE_AVX2_WC_LINECOUNT|USE_AVX512_WC_LINECOUNT'\
+'|USE_NEON_WC_LINECOUNT) 1' "$CONFIG_HEADER" > /dev/null \
+ || expected_failure_status_wc=0
expected_failure_status_sort=2
expected_failure_status_env=0 # env's exec resets default exit handlers