Bogdan wrote:
> Right. And, as I suspected, nothing in any LIBS, LD*, no libobjc found.
> Does it work if you put
>
> AC_LANG([Objective C])
>
> somewhere between the lines
>
> cat >> configure.ac << 'END'
>
> and the first
>
> END
>
> following it (i.e., in the 'configure.ac' file) in the test?
No: With this added configure.ac line (before AC_OUTPUT), the
two tests t/objcxx-minidemo.sh and t/objcxx-deps.sh still fail.
> If not, do you know any function name that we could use in
> AC_CHECK_LIB to check for libobjc?
My test program
================================= hello.mm ==========================
#import <stdio.h>
#import <stdlib.h>
#import <iostream>
class X { int a; };
int main(void)
{
@autoreleasepool
{
std::cout << @"Hello, Objective-C++.";
}
return EXIT_SUCCESS;
}
======================================================================
produces link errors w.r.t. the symbols
objc_autoreleasePoolPush
objc_autoreleasePoolPop
__objc_exec_class
Is one of them suitable for testing? It depends on the ABI. Looking at
https://opensource.apple.com/source/objc4/objc4-706/runtime/objc-abi.h.auto.html
it seems better to choose one of the symbols
_objcInit
objc_getProperty
objc_setProperty
objc_setProperty_atomic
objc_setProperty_nonatomic
...
objc_copyStruct
objc_copyCppObjectAtomic
_objc_empty_cache
...
But wait! The name of the library 'libobjc' is not standardized either.
I would try to just compile a simple Objective-C++ program and see whether that
works or not. Such as:
================================ foo.mm ==============================
@interface MyClass { int _field; }
@property(nonatomic, assign) int myProperty;
@end
@implementation MyClass
@synthesize myProperty = _field;
@end
MyClass *myObject;
int main () {
myObject.myProperty = 10;
return 0;
}
=======================================================================
Missing symbols with clang on OpenBSD:
objc_msg_lookup_sender
__objc_exec_class
Missing symbols with clang on Ubuntu:
objc_msg_lookup
__objc_exec_class
Bruno
