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-rw-r--r--ext/io/wait/extconf.rb28
1 files changed, 28 insertions, 0 deletions
diff --git a/ext/io/wait/extconf.rb b/ext/io/wait/extconf.rb
new file mode 100644
index 00000000000..0c1a8704745
--- /dev/null
+++ b/ext/io/wait/extconf.rb
@@ -0,0 +1,28 @@
+require 'mkmf'
+target = "io/wait"
+unless defined?(checking_for)
+ def checking_for(msg)
+ STDOUT.print "checking for ", msg, "..."
+ STDOUT.flush
+ STDOUT.puts((r = yield) ? "yes" : "no")
+ r
+ end
+end
+unless defined?(macro_defined?)
+ def macro_defined?(macro, src, opt="")
+ try_cpp(src + <<"SRC", opt)
+#ifndef #{macro}
+# error
+#endif
+SRC
+ end
+end
+
+unless /djgpp|mswin|mingw|human/ =~ RUBY_PLATFORM
+ fionread = %w[sys/ioctl.h sys/filio.h].find do |h|
+ checking_for("FIONREAD") {macro_defined?("FIONREAD", "#include <#{h}>\n")}
+ end
+ exit 1 unless fionread
+ $defs << "-DFIONREAD_HEADER=\"<#{fionread}>\""
+ create_makefile(target)
+end