I also documented the process there: http://ofps.oreilly.com/titles/9781449380373/ch03.html#_using_objective_c_or... - Matt Sent from my iPhone On Jan 5, 2011, at 21:31, Laurent Sansonetti <lsansonetti@apple.com> wrote:
Hi Ruben,
MacRuby cannot call vararg functions without proper BridgeSupport metadata, because there is no way it can determine at runtime if a function is variadic or not (because the call site must be compiled differently).
You may need to generate a BridgeSupport file for the wrapper you use. See the gen_bridge_metadata(1) man page for more info.
If the wrapper is a framework, you just copy the file in the Resources/BridgeSupport directory (as documented in the man page), then calling #framework from MacRuby will automatically parse it for you.
If the wrapper is a library that you link statically with your app, you will have to ship the BridgeSupport file in your app bundle, then use the #load_bridge_support_file method from the MacRuby side to load it up.
Laurent
On Jan 5, 2011, at 10:29 AM, Ruben Fonseca wrote:
Hi all.
I'm trying to build a MacRuby 0.8 app with XCode. I want to interact with an exisitng Sqlite3 database. Since I don't want to package or mess with any Rubygem, I decided to look into existing Objective-C Sqlite wrappers.
I've tried PLDatabase and fmdb, and failed with both. The code compiles and the application runs, but when calling a C function what accepts a va_arg argument list, my app receives a EXC_BAD_INSTRUCTION.
Example:
Objective-C function interface:
- (FMResultSet *)executeQuery:(NSString*)sql, ... {
Ruby code
db.executeQuery "SELECT * FROM call"
it receives the error on this C line inside the executeQuery function
va_start(args, sql);
Any hints? Do you recommend a simple way of interacting with a Sqlite3 app with macruby + xcode, without using any gems?
Thank you Ruben _______________________________________________ MacRuby-devel mailing list MacRuby-devel@lists.macosforge.org http://lists.macosforge.org/mailman/listinfo.cgi/macruby-devel
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