ci: do not use sccache for macOS packaging

It is not compatible with building for multiple architectures.

.gitlab/ci/configure_common.cmake

@@ -10,4 +10,6 @@ if (NOT "$ENV{CMAKE_BUILD_TYPE}" STREQUAL "")
   set(CMAKE_BUILD_TYPE "$ENV{CMAKE_BUILD_TYPE}" CACHE STRING "")
 endif ()
 
-include("${CMAKE_CURRENT_LIST_DIR}/configure_sccache.cmake")
+if (NOT configure_no_sccache)
+  include("${CMAKE_CURRENT_LIST_DIR}/configure_sccache.cmake")
+endif()

.gitlab/ci/configure_macos_package.cmake

@@ -20,5 +20,9 @@ set(CMake_INSTALL_DEPENDENCIES "ON" CACHE BOOL "")
 set(CMAKE_SKIP_RPATH "TRUE" CACHE BOOL "")
 set(CMake_TEST_NO_FindPackageModeMakefileTest "TRUE" CACHE BOOL "")
 
+# XXX(sccache): restore sccache when it works for multiple architectures:
+# https://github.com/mozilla/sccache/issues/847
+set(configure_no_sccache 1)
+
 include("${CMAKE_CURRENT_LIST_DIR}/configure_macos_common.cmake")
 include("${CMAKE_CURRENT_LIST_DIR}/configure_common.cmake")

.gitlab/os-macos.yml

@@ -115,13 +115,8 @@
 
     script:
         - *before_script_macos
-        - .gitlab/ci/sccache.sh
-        # Allow the server to already be running.
-        - "sccache --start-server || :"
-        - sccache --show-stats
         - ctest -VV -S .gitlab/ci/ctest_configure.cmake
         - ctest -VV -S .gitlab/ci/ctest_build.cmake
-        - sccache --show-stats
         - cd build
         - cpack -G TGZ
         - cpack -G DragNDrop