Fix build on OpenHarmony (ros2#395)

* Fix build on OpenHarmony

OpenHarmony doesn't support dlinfo

OpenHarmony doesn't support program_invocation_name

Signed-off-by: AIxWall <31502690+AIxWall@users.noreply.github.com>

Author: AIxWall

src/process.c

@@ -60,15 +60,15 @@ char * rcutils_get_executable_name(rcutils_allocator_t allocator)
 
 #if defined __APPLE__ || defined __FreeBSD__ || (defined __ANDROID__ && __ANDROID_API__ >= 21)
   const char * appname = getprogname();
-#elif defined __GNUC__ && !defined(__QNXNTO__)
+#elif defined __GNUC__ && !defined(__QNXNTO__) && !defined(__OHOS__)
   const char * appname = program_invocation_name;
 #elif defined _WIN32 || defined __CYGWIN__
   char appname[MAX_PATH];
   int32_t size = GetModuleFileNameA(NULL, appname, MAX_PATH);
   if (size == 0) {
     return NULL;
   }
-#elif defined __QNXNTO__
+#elif defined __QNXNTO__ || defined __OHOS__
   extern char * __progname;
   const char * appname = __progname;
 #else

src/shared_library.c

@@ -127,7 +127,7 @@ rcutils_load_shared_library(
     goto fail;
   }
   lib->library_path = rcutils_strdup(image_name, lib->allocator);
-#elif defined(_GNU_SOURCE) && !defined(__QNXNTO__) && !defined(__ANDROID__)
+#elif defined(_GNU_SOURCE) && !defined(__QNXNTO__) && !defined(__ANDROID__) && !defined(__OHOS__)
   struct link_map * map = NULL;
   if (dlinfo(lib->lib_pointer, RTLD_DI_LINKMAP, &map) != 0) {
     RCUTILS_SET_ERROR_MSG_WITH_FORMAT_STRING("dlinfo error: %s", dlerror());