Fix build on arm64 (#3)

Signed-off-by: Addisu Z. Taddese <[email protected]>
Co-authored-by: Jose Luis Rivero <[email protected]>

CMakeLists.txt

@@ -4,6 +4,13 @@ project(gz_ogre_next_vendor)
 find_package(ament_cmake REQUIRED)
 find_package(ament_cmake_vendor_package REQUIRED)
 
+set(EXTRA_CMAKE_FLAGS)
+if(CMAKE_SYSTEM_PROCESSOR MATCHES "^(aarch64.*|AARCH64.*|arm64.*|ARM64.*|arm.*|ARM.*)")
+ # Flags for non SIMD architectures
+ # https://github.com/gazebo-forks/ogre-2.3-release/blob/960bb19664879282b979e4ed8cb3ce278c875bdb/debian/rules#L21-L28
+ set(EXTRA_CMAKE_FLAGS -DOGRE_SIMD_NEON:BOOL=FALSE -DOGRE_SIMD_SSE2:BOOL=FALSE)
+endif()
+
 ament_vendor(${PROJECT_NAME}
  VCS_URL https://github.com/OGRECave/ogre-next.git
  VCS_VERSION v2.3.3
@@ -24,6 +31,7 @@ ament_vendor(${PROJECT_NAME}
  -DOGRE_USE_NEW_PROJECT_NAME:BOOL=ON
  -DOGRE_VULKAN_WINDOW_NULL:BOOL=TRUE
  -DOGRE_VULKAN_WINDOW_XCB:BOOL=ON
+ ${EXTRA_CMAKE_FLAGS}
  GLOBAL_HOOK
  PATCHES
  patches/0001-Fix-incomplete-vulkan-linkage.patch