diff options
Diffstat (limited to 'ext/-test-')
| -rw-r--r-- | ext/-test-/public_header_warnings/extconf.rb | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/ext/-test-/public_header_warnings/extconf.rb b/ext/-test-/public_header_warnings/extconf.rb new file mode 100644 index 0000000000..f6a8a51f63 --- /dev/null +++ b/ext/-test-/public_header_warnings/extconf.rb @@ -0,0 +1,23 @@ +# +# Under compilers with WERRORFLAG, MakeMakefile.try_compile treats warnings as errors, so we can +# use append_cflags to test whether the public header files emit warnings with certain flags turned +# on. +# +def check_append_cflags(flag, msg = nil) + msg ||= "flag #{flag} is not acceptable" + !$CFLAGS.include?(flag) or raise("flag #{flag} already present in $CFLAGS") + append_cflags(flag) + $CFLAGS.include?(flag) or raise(msg) +end + +if %w[gcc clang].include?(RbConfig::CONFIG['CC']) + config_string("WERRORFLAG") or raise("expected WERRORFLAG to be defined") + + # should be acceptable on all modern C compilers + check_append_cflags("-D_TEST_OK", "baseline compiler warning test failed") + + # Feature #20507: Allow compilation of C extensions with -Wconversion + check_append_cflags("-Wconversion", "-Wconversion raising warnings in public headers") +end + +create_makefile("-test-/public_header_warnings") |