Apple

On 18 Jan 2015, at 16:46, tridiak <email@hidden> wrote:

I have problem with a C++ file finding a symbol in a dynamic library.

==============================
// library header file
#ifdef __clpusplus
extern "C" {
#endif
extern SOArrayRef SOGetAllSpells();
#ifdef __clpusplus
}
#endif

===============================
// Test.m file

void Test1() {
SOArrayRef ary=SOGetAllSpells();
}
================================
// TestFile.cpp file

void SATest() {
SOArrayRef ary=SOGetAllSpells();
}
===============================

When I attempt to compile, the compiler spews out
Undefined symbols for architecture x86_64:
"SOGetAllSpells()", referenced from:
_SATest in TestFile.o
ld: symbol(s) not found for architecture x86_64

The error only occurs in the C++ file, not the .m (or C) file.
The symbol exists otherwise it would complain ‘_Test1 in Test.o' also.
If I remove the symbol reference from the C++ file, it compiles without any issue.
The library symbol exists, nm verified it for me.

OS 10.10.1, XCode 5.1.1 & 6.1

Any idea why this is happening?

References:
	>C++ file linking issue (From: tridiak <email@hidden>)