Creating and using a static lib in xcode
- by Alasdair Morrison
I am trying to create a static library in xcode and link to that static library from another program.
So as a test i have created a BSD static C library project and just added the following code:
//Test.h
int testFunction();
//Test.cpp
#include "Test.h"
int testFunction() {
return 12;
}
This compiles fine and create a .a file (libTest.a).
Now i want to use it in another program so I create a new xcode project (cocoa application)
Have the following code:
//main.cpp
#include <iostream>
#include "Testlib.h"
int main (int argc, char * const argv[]) {
// insert code here...
std::cout << "Result:\n" <<testFunction();
return 0;
}
//Testlib.h
extern int testFunction();
I right clicked on the project - add - existing framework - add other
Selected the .a file and it added it into the project view.
I always get this linker error:
Build TestUselibrary of project TestUselibrary with configuration Debug
Ld build/Debug/TestUselibrary normal x86_64
cd /Users/myname/location/TestUselibrary
setenv MACOSX_DEPLOYMENT_TARGET 10.6
/Developer/usr/bin/g++-4.2 -arch x86_64 -isysroot /Developer/SDKs/MacOSX10.6.sdk
-L/Users/myname/location/TestUselibrary/build/Debug
-L/Users/myname/location/TestUselibrary/../Test/build/Debug
-F/Users/myname/location/TestUselibrary/build/Debug
-filelist /Users/myname/location/TestUselibrary/build/TestUselibrary.build/Debug/TestUselibrary.build/Objects-normal/x86_64/TestUselibrary.LinkFileList
-mmacosx-version-min=10.6 -lTest -o /Users/myname/location/TestUselibrary/build/Debug/TestUselibrary
Undefined symbols:
"testFunction()", referenced from:
_main in main.o
ld: symbol(s) not found
collect2: ld returned 1 exit status
I am new to macosx development and fairly new to c++. I am probably missing something fairly obvious, all my experience comes from creating dlls on the windows platform.
I really appreciate any help.
