Include float.h if it exists, for _RC_CHOP and _MCW_RC

Alc/ALu.c

@@ -34,6 +34,10 @@
 #include "alu.h"
 #include "bs2b.h"
 
+#if defined (HAVE_FLOAT_H)
+#include <float.h>
+#endif
+
 #if defined(HAVE_STDINT_H)
 #include <stdint.h>
 typedef int64_t ALint64;

CMakeLists.txt

@@ -111,6 +111,7 @@ ELSE()
 ENDIF()
 
 CHECK_INCLUDE_FILE(fenv.h HAVE_FENV_H)
+CHECK_INCLUDE_FILE(float.h HAVE_FLOAT_H)
 
 CHECK_LIBRARY_EXISTS(m  sqrtf  "" HAVE_SQRTF)
 CHECK_LIBRARY_EXISTS(m  acosf  "" HAVE_ACOSF)

config.h.in

@@ -52,6 +52,9 @@
 /* Define if we have pthread_np.h */
 #cmakedefine HAVE_PTHREAD_NP_H
 
+/* Define if we have float.h */
+#cmakedefine HAVE_FLOAT_H
+
 /* Define if we have fenv.h */
 #cmakedefine HAVE_FENV_H