# HG changeset patch
# User Chris Cannam
# Date 1740596123 0
#      Wed Feb 26 18:55:23 2025 +0000
# Node ID 46b1d661f7b0f60da0876f271a83569aa527fa8f
# Parent  3e72d20f5ac6ab3330c1a0b76442945409d8aa2e
Support building with a C++ compiler

diff --git a/ffi/distance.c b/ffi/distance.c
--- a/ffi/distance.c
+++ b/ffi/distance.c
@@ -2,8 +2,15 @@
 #include <math.h>
 #include <stdint.h>
 
-double distance_manhattan(const double *const restrict v,
-                          const double *const restrict w,
+// restrict is a keyword in C, but we want this to be compileable by
+// C++ compilers as well
+
+#ifdef _MSC_VER
+#  define __restrict__ __restrict
+#endif
+
+double distance_manhattan(const double *const __restrict__ v,
+                          const double *const __restrict__ w,
                           const int64_t count)
 {
     double d = 0.0;