I would like to load a c/c++ shared object in my Apple TV project. I create a simple library using the following tutorial:
Due to the fact i want to compile and load it into my Apple TV project i did some changes:
The dlopen code is in my ViewController.m on which user press a button and then dlopen is called.
// Open the library.
NSString * libraryname = [NSString stringWithFormat:@"libRatings.A"];
NSString * libraryfullpath = [mainBundle pathForResource:libraryname ofType:@"dylib"];
void *lib_handle = dlopen([libraryfullpath UTF8String], RTLD_NOW);
if (lib_handle)
{
printf("[%s] dlopen(\"%s\", RTLD_NOW): Successful\n", __FILE__, "library");
}
else
{
printf("\n\n[%s] Unable to open library: %s\n",
__FILE__, dlerror());
exit(EXIT_FAILURE);
}
changed the compilation command to:
clang -dynamiclib -std=gnu99 -current_version 1.0 -compatibility_version 1.0 -fvisibility=hidden -arch arm64 -mtvos-version-min=9.2 -g -Wno-sign-conversion -fembed-bitcode-marker -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/SDKs/AppleTVOS9.2.sdk Ratings.c -o libRatings.A.dylib
I copied my dylib into my project and verified that it is copied as a bundle resource.
When running my app, after dlopen call failed i'm getting the following error:
[/Users/gfsrnd/Documents/sample1/sample1/sample1/ViewController.m] Unable to open library: dlopen(/var/containers/Bundle/Application/CFF7EC2A-7DF5-4270-9E99-2D5FAEBB0275/sample1 copy.app/libRatings.A.dylib, 2): no suitable image found. Did find:
/var/containers/Bundle/Application/CFF7EC2A-7DF5-4270-9E99-2D5FAEBB0275/sample1 copy.app/libRatings.A.dylib: mmap() error 1 at address=0x1024D4000, size=0x00008000 segment=__TEXT in Segment::map() mapping /var/containers/Bundle/Application/CFF7EC2A-7DF5-4270-9E99-2D5FAEBB0275/sample1 copy.app/libRatings.A.dylib
Result of otool is:
**> otool -TV libRatings.A.dylib**
libRatings.A.dylib:
Table of contents (0 entries)
module name symbol name
Result of nm is:
**>nm -ag libRatings.A.dylib**
U ___stack_chk_fail
U ___stack_chk_guard
U ___strncat_chk
0000000000007d30 T _addRating
0000000000007ecc T _clearRatings
0000000000007db8 T _meanRating
U _memset
U _printf
0000000000007ebc T _ratings
U _strdup
U _strlen
U dyld_stub_binder
Can anyone please advise what am i doing wrong?
Thanks
Indeed, seems that there is no way to do dynamic loading...
I just used static linking..