vcpkg/ports/s2geometry/CMakeLists.txt.patch

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5ecd280..9859890 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -20,16 +20,8 @@ set(CMAKE_CXX_EXTENSIONS OFF)
 
 list(APPEND CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/third_party/cmake")
 
-option(WITH_GFLAGS "Use gflags to change command line flags." OFF)
-add_feature_info(GFLAGS WITH_GFLAGS
-                 "allows changing command line flags.")
 
-# glog option can only be turned on if gflags is on.
-cmake_dependent_option(WITH_GLOG "Use glog for logging." ON
-                       "WITH_GFLAGS" OFF)
-add_feature_info(GLOG WITH_GLOG "provides logging configurability.")
-
-option(BUILD_SHARED_LIBS "Build shared libraries instead of static." ON)
+option(BUILD_SHARED_LIBS "Build shared libraries instead of static." OFF)
 add_feature_info(SHARED_LIBS BUILD_SHARED_LIBS
                  "builds shared libraries instead of static.")
 
@@ -37,26 +29,19 @@ option(BUILD_EXAMPLES "Build s2 documentation examples." ON)
 
 feature_summary(WHAT ALL)
 
-if (WITH_GLOG)
-    find_package(Glog REQUIRED)
-    # FindGFlags.cmake and FindGlog.cmake do not seem to implement REQUIRED;
-    # check manually.
-    if (NOT ${GLOG_FOUND})
-        message(FATAL_ERROR "Glog requested but not found")
-    endif()
-    add_definitions(-DS2_USE_GLOG)
-else()
-    # Don't output anything for LOG(INFO).
-    add_definitions(-DABSL_MIN_LOG_LEVEL=1)
+find_package(glog CONFIG REQUIRED)
+# FindGFlags.cmake and FindGlog.cmake do not seem to implement REQUIRED;
+# check manually.
+if (NOT ${GLOG_FOUND})
+    message(FATAL_ERROR "Glog requested but not found")
 endif()
+add_definitions(-DS2_USE_GLOG)
 
-if (WITH_GFLAGS)
-    find_package(GFlags REQUIRED)
-    if (NOT ${GFLAGS_FOUND})
-        message(FATAL_ERROR "GFlags requested but not found")
-    endif()
-    add_definitions(-DS2_USE_GFLAGS)
+find_package(gflags CONFIG REQUIRED)
+if (NOT ${GFLAGS_FOUND})
+    message(FATAL_ERROR "GFlags requested but not found")
 endif()
+add_definitions(-DS2_USE_GFLAGS)
 
 find_package(OpenSSL REQUIRED)
 # pthreads isn't used directly, but this is still required for std::thread.
@@ -204,14 +189,18 @@ add_library(s2testing STATIC
             src/s2/s2testing.cc)
 target_link_libraries(
     s2
-    ${GFLAGS_LIBRARIES} ${GLOG_LIBRARIES} ${OPENSSL_LIBRARIES}
+    gflags::gflags glog::glog OpenSSL::SSL OpenSSL::Crypto
     ${CMAKE_THREAD_LIBS_INIT})
 
 # Allow other CMake projects to use this one with:
 # list(APPEND CMAKE_MODULE_PATH "<path_to_s2geometry_dir>/third_party/cmake")
 # add_subdirectory(<path_to_s2geometry_dir> s2geometry)
 # target_link_libraries(<target_name> s2)
-target_include_directories(s2 PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/src)
+target_include_directories(s2 PUBLIC 
+  $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/src>
+  $<INSTALL_INTERFACE:include>
+)
+
 
 # We don't need to install all headers, only those
 # transitively included by s2 headers we are exporting.
@@ -407,7 +396,18 @@ install(FILES src/s2/util/math/mathutil.h
 install(FILES src/s2/util/units/length-units.h
               src/s2/util/units/physical-units.h
         DESTINATION include/s2/util/units)
-install(TARGETS s2 s2testing DESTINATION lib)
+ install(TARGETS s2 s2testing
+         RUNTIME DESTINATION bin
+         ARCHIVE DESTINATION lib
+         LIBRARY DESTINATION lib)
+install(TARGETS s2 
+        EXPORT unofficial-s2Targets
+        )
+install(EXPORT unofficial-s2Targets
+  NAMESPACE unofficial-s2
+  FILE unofficial-s2Targets.cmake
+  DESTINATION share/unofficial-s2/
+)
 
 message("GTEST_ROOT: ${GTEST_ROOT}")
 if (GTEST_ROOT)
@@ -534,3 +534,17 @@ endif()
 if (${SWIG_FOUND} AND ${PYTHONLIBS_FOUND})
   add_subdirectory("src/python" python)
 endif()
+
+
+include(CMakePackageConfigHelpers)
+# generate the config file that is includes the exports
+configure_package_config_file(${CMAKE_CURRENT_SOURCE_DIR}/Config.cmake.in
+  "${CMAKE_CURRENT_BINARY_DIR}/unofficial-s2Config.cmake"
+  INSTALL_DESTINATION "share/unofficial-s2/"
+  NO_SET_AND_CHECK_MACRO
+  NO_CHECK_REQUIRED_COMPONENTS_MACRO
+  )
+  install(FILES
+  ${CMAKE_CURRENT_BINARY_DIR}/unofficial-s2Config.cmake
+  DESTINATION "share/unofficial-s2/"
+  )