external libs, libmodplug: Fix -Wregister warnings from new gcc:

warning: ISO C++17 does not allow 'register' storage class specifier Noticed in a commit authored by Vitaly Novichkov.
libsdl-org · Dec 1, 2019 · 820bb5e · 820bb5e
1 parent 476bdab
commit 820bb5e
Showing 1 changed file with 8 additions and 2 deletions.
diff --git a/external/libmodplug-0.8.9.0/src/fastmix.cpp b/external/libmodplug-0.8.9.0/src/fastmix.cpp
@@ -287,16 +287,22 @@ CzWINDOWEDFIR sfir;
 // ----------------------------------------------------------------------------
 // MIXING MACROS
 // ----------------------------------------------------------------------------
+#if defined(__cplusplus) && (__cplusplus >= 201402L)
+#define REGISTER
+#else
+#define REGISTER register
+#endif
+
 #define SNDMIX_BEGINSAMPLELOOP8\
-	register MODCHANNEL * const pChn = pChannel;\
+	REGISTER MODCHANNEL * const pChn = pChannel;\
 	nPos = pChn->nPosLo;\
 	const signed char *p = (signed char *)(pChn->pCurrentSample+pChn->nPos);\
 	if (pChn->dwFlags & CHN_STEREO) p += pChn->nPos;\
 	int *pvol = pbuffer;\
 	do {
 
 #define SNDMIX_BEGINSAMPLELOOP16\
-	register MODCHANNEL * const pChn = pChannel;\
+	REGISTER MODCHANNEL * const pChn = pChannel;\
 	nPos = pChn->nPosLo;\
 	const signed short *p = (signed short *)(pChn->pCurrentSample+(pChn->nPos*2));\
 	if (pChn->dwFlags & CHN_STEREO) p += pChn->nPos;\