From 8c64335e2127d32c51c02779a5b8bcbc239b9a0f Mon Sep 17 00:00:00 2001
From: Alexander Neumann <alexander.neumann@hamburg.de>
Date: Mon, 3 Feb 2020 13:08:37 +0100
Subject: Fatal error on invalid feature combination.

---
 ports/libwebp/portfile.cmake | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/ports/libwebp/portfile.cmake b/ports/libwebp/portfile.cmake
index 2682baa3b..9dcf6e971 100644
--- a/ports/libwebp/portfile.cmake
+++ b/ports/libwebp/portfile.cmake
@@ -42,6 +42,10 @@ if(VCPKG_TARGET_IS_OSX)
     endif()
 endif()
 
+if("webp_js" IN_LIST FEATURES AND "${FEATURES}" MATCHES "(anim|gif2webp|img2webp|extras|info|vwebp|mux|cwebp|dwebp)")
+    message(FATAL_ERROR "Feature webp_js conflicts with features anim|gif2webp|img2webp|extras|info|vwebp|mux|cwebp|dwebp!")
+endif()
+    
 vcpkg_configure_cmake(
   SOURCE_PATH ${SOURCE_PATH}
   PREFER_NINJA
-- 
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