Windows: fix xapian-core compilation (for doxygen)

Author: howetuft

conan-profiles/conan-profile-Windows-X64

@@ -19,10 +19,12 @@ tools.build:cxxflags=["/openmp", "/MP", "/DEBUG:NONE", "/O2", "/arch:AVX"]
 tools.build:cflags=["/openmp", "/MP", "/DEBUG:NONE", "/O2", "/arch:AVX"]
 embree3/*:tools.build:cxxflags=["/openmp", "/MP", "/DEBUG:NONE", "/O2"]
 
-# libiconv/*:tools.microsoft.bash:path=C:\msys64\usr\bin\bash.exe
-# libiconv/*:tools.microsoft.bash:subsystem=msys2
+# Following deps are to be compiled with msys2/gcc: MSVC flags will not do
 libiconv/*:tools.build:cxxflags=!
 libiconv/*:tools.build:cflags=!
+xapian-core/*:tools.build:cxxflags=!
+xapian-core/*:tools.build:cflags=!
+xapian-core/*:compiler.cppstd=14
 
 [options]
 # MSVC does not support avx2 nor avx512

local-conan-recipes/opensubdiv/conanfile.py

@@ -144,6 +144,7 @@ def generate(self):
         tc.variables["NO_GLTESTS"] = True
         tc.variables["NO_MACOS_FRAMEWORK"] = True
         tc.cache_variables["CMAKE_VERBOSE_MAKEFILE"] = True
+        tc.cache_variables["OPENMP_FOUND"] = True  # Force OpenMP
         tc.generate()
 
         deps = CMakeDeps(self)