introduces ios support? still needs metal

fpc/library/helper.cpp

@@ -6,6 +6,9 @@
 #include "unistd.h"
 #include "libgen.h"
 #include "sys/stat.h"
+#ifdef __APPLE__
+#include <mach-o/dyld.h>
+#endif
 
 unsigned int g_hashState = 102851263;
 unsigned int CProject::GenerateProjectHash( void )
@@ -23,7 +26,13 @@ unsigned int CProject::GenerateProjectHash( void )
 };
 
 static char path[1024];
+#ifdef __linux__
 static ssize_t pathSize = readlink("/proc/self/exe", path, sizeof(path) - 1);
+#endif
+#ifdef __APPLE__
+static uint32_t pathSize = sizeof(path);
+int pathResult = _NSGetExecutablePath(path, &pathSize);
+#endif
 char *szPathDir = dirname(path);
 char *szBuildDir = 0;
 char *IFileSystem2::OwnDirectory()