support __kmpc_critical and __kmpc_end_critical in simpleomp.cpp

[jozefchutka]

I am using simpleomp.cpp with emscripten/wasm.
Following build instructions on emscripten-core/emscripten#13892 I am able to build simpleomp.o and link it, however, seems to be missing __kmpc_critical and __kmpc_end_critical and is failing with:

wasm-ld: error: lto.tmp: undefined symbol: __kmpc_critical
wasm-ld: error: lto.tmp: undefined symbol: __kmpc_end_critical

Can you please implement these missing dependencies?

[jozefchutka]

following addition (code generated by ai) did the work for me:

typedef struct ident_t {
    int32_t reserved_1;
    int32_t flags;
    int32_t reserved_2;
    int32_t reserved_3;
    const char *psource;
} ident_t;
typedef void* kmp_critical_name; // Opaque handle for critical section lock

void __kmpc_critical(ident_t *loc, int32_t global_tid, kmp_critical_name *crit)
{
    (void)loc;        // Mark as unused
    (void)global_tid; // Mark as unused
    (void)crit;       // Mark as unused
    // No operation: This provides NO thread safety.
}

void __kmpc_end_critical(ident_t *loc, int32_t global_tid, kmp_critical_name *crit)
{
    (void)loc;        // Mark as unused
    (void)global_tid; // Mark as unused
    (void)crit;       // Mark as unused
    // No operation.
}