Try add this line:
extern void foo(void);
Sent from my iPhone
> On 2013年10月19日, at 1:21, Charles Srstka <cocoa...@charlessoft.com> wrote:
>
>> On Oct 18, 2013, at 6:15 AM, Dmitry Markman <dmark...@me.com> wrote:
>>
>> I don't thinks strip remove info used by dynamic linker
>> Thus dlsym should work
>> As long as symbol is external (not with hidden visibility) dlsym is able to
>> find the symbol
>> (stripped or not)
>
> Not in my testing:
>
> #import <Foundation/Foundation.h>
> #include <dlfcn.h>
>
> void foo() {
>
> }
>
> int main(int argc, const char * argv[]) {
> @autoreleasepool {
> NSLog(@"The correct address is %p", &foo);
> NSLog(@"dlsym returns %p", dlsym(RTLD_SELF, "foo"));
> }
> return 0;
> }
>
> In debug mode:
>
> 2013-10-18 12:16:37.027 dlsymtest[95106:303] The correct address is
> 0x100000e40
> 2013-10-18 12:16:37.031 dlsymtest[95106:303] dlsym returns 0x100000e40
> Program ended with exit code: 0
>
> Doing an Archive in Xcode and running the resulting binary in the Terminal:
>
> 2013-10-18 12:17:17.891 dlsymtest[95151:707] The correct address is
> 0x10574fe6a
> 2013-10-18 12:17:17.902 dlsymtest[95151:707] dlsym returns 0x0
>
> It won't work with the default build settings. Other commenters are correct,
> however, that it can work if you move the symbols you want to look up into a
> library.
>
> Charles
>
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