From af5e5951c63ebb6f3d0ab39bc0026113575fc1b6 Mon Sep 17 00:00:00 2001
From: Robin Watts <Robin.Watts@artifex.com>
Date: Thu, 28 Apr 2022 20:11:24 +0100
Subject: Tweak CAL build flags on windows.

---
 psi/msvc.mak | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'psi')

diff --git a/psi/msvc.mak b/psi/msvc.mak
index 0841d0b38..f62908040 100644
--- a/psi/msvc.mak
+++ b/psi/msvc.mak
@@ -278,6 +278,15 @@ IMGGENDIR=$(GLGENDIR)
 IMGOBJDIR=$(GLOBJDIR)
 !endif
 
+# CAL detects the presence of SSE/AVX2 at runtime. We assume
+# modern windows compilers can build for both, and they will
+# just be disabled automatically if not present. If the compiler
+# can't cope with this, then define CAL_CFLAGS to be empty
+# in the makefile invocation.
+!ifndef CAL_CFLAGS
+CAL_CFLAGS=/DHAVE_SSE4_2 /DHAVE_AVX2
+!endif
+
 CONTRIBDIR=.\contrib
 
 # Can we build PCL and XPS and PDF
-- 
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