LNK1120, LNK2001, LNK2019 - Can't track down the reason - c

Question

I have no idea what the problem is. I am trying to build my project for release but the linker complains about not finding external symbols.
The thing that's odd is that I copy & pasted all include paths and dependencies from the Debug into the Release build configuration and double checked it.
get_PC_definition() is e.g. declared in cpudefs.h:
/* Return register definition of instruction pointer */
extern RegisterDefinition * get_PC_definition(Context * ctx);
There are a few implementations of this function - which one I chose is controled by macros so yes, I defined all necessary macros too:
RegisterDefinition * get_PC_definition(Context * ctx) {
static RegisterDefinition * reg_def = NULL;
if (!context_has_state(ctx))
return NULL;
// and so on ..
return reg_def;
}
cpudefs.obj gets build so far but the Linker just mocks around .. maybe I am already blind to the error but like I said, I copied the configurations from the Debug into the Release build configuration.
Any ideas what I could try?
Error output:
Error 43 error LNK1120: 9 unresolved externals C:\svn\AgentSib\Release\agentsib.exe agentsib
Error 31 error LNK2001: unresolved external symbol _get_PC_definition C:\svn\AgentSib\AgentSib\registers.obj agentsib
Error 32 error LNK2001: unresolved external symbol _get_PC_definition C:\svn\AgentSib\AgentSib\runctrl.obj agentsib
Error 34 error LNK2001: unresolved external symbol _get_PC_definition C:\svn\AgentSib\AgentSib\symbols_cdb.obj agentsib
Error 35 error LNK2001: unresolved external symbol _get_PC_definition C:\svn\AgentSib\AgentSib\cpudefs.obj agentsib
Error 36 error LNK2001: unresolved external symbol _get_PC_definition C:\svn\AgentSib\AgentSib\expressions.obj agentsib
Error 37 error LNK2001: unresolved external symbol _get_PC_definition C:\svn\AgentSib\AgentSib\funccall.obj agentsib
Error 38 error LNK2001: unresolved external symbol _get_PC_definition C:\svn\AgentSib\AgentSib\profiler_sst.obj agentsib
Error 41 error LNK2019: unresolved external symbol _BREAK_INST referenced in function _get_break_instruction C:\svn\AgentSib\AgentSib\cpudefs.obj agentsib
Error 27 error LNK2019: unresolved external symbol _cpu_bp_get_capabilities referenced in function _context_get_supported_bp_access_types C:\svn\AgentSib\AgentSib\context-sib.obj agentsib
Error 30 error LNK2019: unresolved external symbol _cpu_bp_on_resume referenced in function _sib_resume C:\svn\AgentSib\AgentSib\context-sib.obj agentsib
Error 28 error LNK2019: unresolved external symbol _cpu_bp_plant referenced in function _context_plant_breakpoint C:\svn\AgentSib\AgentSib\context-sib.obj agentsib
Error 29 error LNK2019: unresolved external symbol _cpu_bp_remove referenced in function _context_unplant_breakpoint C:\svn\AgentSib\AgentSib\context-sib.obj agentsib
Error 42 error LNK2019: unresolved external symbol _crawl_stack_frame referenced in function _trace_stack C:\svn\AgentSib\AgentSib\stacktrace.obj agentsib
Error 33 error LNK2019: unresolved external symbol _get_PC_definition referenced in function _command_get_children_cache_client C:\svn\AgentSib\AgentSib\stacktrace.obj agentsib
Error 39 error LNK2019: unresolved external symbol _ini_cpudefs_mdep referenced in function _ini_cpudefs C:\svn\AgentSib\AgentSib\cpudefs.obj agentsib
Error 40 error LNK2019: unresolved external symbol _regs_index referenced in function _get_reg_by_dwarf_id C:\svn\AgentSib\AgentSib\cpudefs.obj agentsib
Edit:
Calling function get_PC_definition()
static int set_debug_regs(Context * ctx, int check_ip, int * step_over_hw_bp) {
int i;
int ret;
uint32_t dr7 = 0;
ContextAddress ip = 0;
ContextExtensioni8051 * dext = EXT(ctx);
ContextExtensioni8051 * bps = EXT(context_get_group(ctx, CONTEXT_GROUP_BREAKPOINT));
RegisterDefinition *reg_def = NULL;
ret = 0;
if (check_ip) {
*step_over_hw_bp = 0;
reg_def = get_PC_definition(ctx);
ret = context_read_reg(ctx, reg_def, 0, reg_def->size, &ip);
if ( ret < 0 )
return -1;
}
return 0;
}

Answer 1

This question "Visual Studio 2010's strange "warning LNK4042"" had the solution to my problem.
After all it was a linker problem caused by the compiler..
Under Configuratoin Properties >> C/C++ >> Output Files >> Object File Name I used for both configurations $(IntDir) whereas it worked for Debug but not for Release. Does anybody know why?
Changing it to
$(IntDir)\%(RelativeDir)
was the solution that saved my day.