OpenEXR: Disable Building Tools on CLANG environments

mingw-w64-openexr/PKGBUILD

@@ -54,6 +54,10 @@ build() {
     extra_config+=("-DCMAKE_BUILD_TYPE=Debug")
   fi
 
+  if [[ ${MINGW_PACKAGE_PREFIX} == *-clang-* ]]; then
+    extra_config+=("-DOPENEXR_BUILD_TOOLS=OFF")
+  fi
+
   CXXFLAGS+=" -Wno-ignored-attributes"
 
   MSYS2_ARG_CONV_EXCL="-DCMAKE_INSTALL_PREFIX=" \