Revert "LADSPA: CAPS: fix compilation with MinGW GCC >= 5.0"

This reverts commit 14b2028438.

plugins/LadspaEffect/caps/CMakeLists.txt

@@ -7,7 +7,7 @@ IF(LMMS_BUILD_WIN64)
 ADD_DEFINITIONS(-DLMMS_BUILD_WIN64)
 ENDIF(LMMS_BUILD_WIN64)
 SET_TARGET_PROPERTIES(caps PROPERTIES PREFIX "")
-SET_TARGET_PROPERTIES(caps PROPERTIES COMPILE_FLAGS "-O2 -funroll-loops -Wno-write-strings -std=c++11")
+SET_TARGET_PROPERTIES(caps PROPERTIES COMPILE_FLAGS "-O2 -funroll-loops -Wno-write-strings")
 
 IF(LMMS_BUILD_WIN32)
 	ADD_CUSTOM_COMMAND(TARGET caps POST_BUILD COMMAND "${STRIP}" \"$<TARGET_FILE:caps>\")

plugins/LadspaEffect/caps/basics.h

@@ -33,11 +33,15 @@
 #define _USE_GNU 1
 
 /* unlocking some standard math calls. */
+#define __USE_ISOC99 1
+#define __USE_ISOC9X 1
+#define _ISOC99_SOURCE 1
+#define _ISOC9X_SOURCE 1
 
 #include <stdlib.h>
 #include <string.h>
 
-#include <cmath>
+#include <math.h>
 
 #include <assert.h>
 #include <stdio.h>
@@ -180,7 +184,7 @@ class Plugin {
 		inline sample_t getport_unclamped (int i)
 			{
 				sample_t v = *ports[i];
-				return (std::isinf (v) || std::isnan(v)) ? 0 : v;
+				return (isinf (v) || isnan(v)) ? 0 : v;
 			}
 
 		/* get port value and clamp to port range */

plugins/LadspaEffect/caps/dsp/windows.h

@@ -28,8 +28,6 @@
 #ifndef _DSP_WINDOWS_H_ 
 #define _DSP_WINDOWS_H_
 
-#include <cmath>
-
 namespace DSP {
 	
 /* prototypes for window value application ... */
@@ -149,7 +147,7 @@ kaiser (sample_t * s, int n, double beta)
 		double k = besseli ((beta * sqrt (1 - pow ((2 * i / (n - 1)), 2)))) / bb;
 
 		/* can you spell hack */
-		if (std::isinf(k) || std::isnan(k))
+		if (!isfinite (k) || isnan(k))
 			k = 0;
 
 		F (s[si], k);