allow pspsdk to be built without pthread-embedded

just like it used to work until 8a0ab6b.

closes #183

src/libcglue/init.c

@@ -29,7 +29,7 @@ void __deinit_mutex();
 
 extern int sce_newlib_nocreate_thread_in_start __attribute__((weak));
 
-#ifdef F___libpthreadglue_init
+#if defined(F___libpthreadglue_init) && !defined(PSP_WITHOUT_PTHREAD)
 /* Note: This function is being called from __libcglue_init.
 * It is a weak function because can be override by user program
 */
@@ -38,6 +38,8 @@ void __libpthreadglue_init()
 {
     pthread_init();
 }
+#elif defined(PSP_WITHOUT_PTHREAD)
+#define __libpthreadglue_init() do{}while(0)
 #else
 void __libpthreadglue_init();
 #endif
@@ -113,4 +115,4 @@ void exit(int retval)
 {
 	_exit(retval);
 }
-#endif
+#endif

src/libpthreadglue/osal.c

@@ -9,6 +9,7 @@
  *
  */
 
+#ifndef PSP_WITHOUT_PTHREAD
 #include <pthread.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -786,3 +787,5 @@ int pte_osAtomicIncrement(int *pdest)
   return val;
 }
 #endif
+
+#endif /* PSP_WITHOUT_PTHREAD */

src/libpthreadglue/tls-helper.c

@@ -9,6 +9,7 @@
  *
  */
 
+#ifndef PSP_WITHOUT_PTHREAD
 #include <stdio.h>
 #include <stdlib.h>
 
@@ -251,4 +252,6 @@ pte_osResult pte_osTlsFree(unsigned int index)
 {
   return pteTlsFree(index);
 }
-#endif
+#endif
+
+#endif /* PSP_WITHOUT_PTHREAD */