Added a BuildConfig header that is generated by

cmake to keep track of the OSGEARTH_HAVE_XXX
defines rather than passing in preprocessor.
This allows consuming applications to inspect
the build configuration when building their application.

CMakeLists.txt

@@ -125,10 +125,11 @@ find_package(OpenGL REQUIRED)
 find_package(OSG REQUIRED)
 find_package(CURL REQUIRED)
 find_package(GDAL REQUIRED)
+find_package(Sqlite3 REQUIRED)
 
 # optional
 find_package(GEOS)
-find_package(Sqlite3)
+
 find_package(Draco)
 find_package(BASISU)
 find_package(GLEW)
@@ -138,6 +139,27 @@ find_package(Blend2D)
 find_package(Blosc)
 find_package(spdlog)
 
+# Configure OSGEARTH_HAVE_XXX variables for the BuildConfig
+IF(Protobuf_FOUND AND Protobuf_PROTOC_EXECUTABLE)
+  SET(OSGEARTH_HAVE_MVT ON)
+ENDIF()
+
+if(SQLITE3_FOUND)
+    set(OSGEARTH_HAVE_MBTILES ON)
+endif(SQLITE3_FOUND)
+
+if(Protobuf_FOUND)
+    set(OSGEARTH_HAVE_PROTOBUF ON)
+endif()
+
+IF (GEOS_FOUND)
+    set(OSGEARTH_HAVE_GEOS ON)
+ENDIF(GEOS_FOUND)
+
+if(draco_FOUND)
+    set(OSGEARTH_HAVE_DRACO ON)
+endif(draco_FOUND)
+
 if(OSGEARTH_BUILD_CESIUM_NODEKIT)
     find_package(CesiumNative)
 endif()
@@ -174,20 +196,6 @@ if(spdlog_FOUND)
     add_definitions(-DHAVE_SPDLOG)
 endif()
 
-# Sqlite enables the MBTiles format:
-if(SQLITE3_FOUND)
-    ADD_DEFINITIONS(-DOSGEARTH_HAVE_MBTILES)
-endif(SQLITE3_FOUND)
-
-# DRACO enables geometry compression sometimes used in glTF:
-if(draco_FOUND)
-    ADD_DEFINITIONS(-DOSGEARTH_HAVE_DRACO)
-endif(draco_FOUND)
-
-if(Protobuf_FOUND)
-    add_definitions(-DOSGEARTH_HAVE_PROTOBUF)
-endif()
-
 # Tracy is a profiler
 if(TRACY_FOUND AND OSGEARTH_ENABLE_PROFILING)
     ADD_DEFINITIONS(-DOSGEARTH_PROFILING)
@@ -199,9 +207,13 @@ if(GLEW_FOUND AND EXISTS "${OSGEARTH_SOURCE_DIR}/src/third_party/imgui/imgui.cpp
 endif()
 
 if(OSGEARTH_ENABLE_GEOCODER)
-    add_definitions(-DOSGEARTH_HAVE_GEOCODER)
+    set(OSGEARTH_HAVE_GEOCODER ON)
 endif()
 
+IF(BLEND2D_FOUND)
+    set(OSGEARTH_HAVE_BLEND2D ON)
+ENDIF()
+
 if(OSGEARTH_ASSUME_SINGLE_GL_CONTEXT)
     add_definitions(-DOSGEARTH_SINGLE_GL_CONTEXT)
 endif()

src/applications/osgearth_mvtindex/osgearth_mvtindex.cpp

@@ -20,10 +20,6 @@
 * along with this program.  If not, see <http://www.gnu.org/licenses/>
 */
 
-// TODO:  Reconfigure CMake to not require this.....
-#define OSGEARTH_HAVE_MVT 1
-#define OSGEARTH_HAVE_SQLITE3 1
-
 #include <osgEarth/TileKey>
 #include <osgEarth/FeatureSource>
 #include <osgEarth/FeatureCursor>

src/osgEarth/BuildConfig.in

@@ -0,0 +1,13 @@
+// BuildConfig - Generated by CMake
+#ifndef OSGEARTH_BUILDCONFIG_H
+#define OSGEARTH_BUILDCONFIG_H
+
+#cmakedefine OSGEARTH_HAVE_MVT
+#cmakedefine OSGEARTH_HAVE_MBTILES
+#cmakedefine OSGEARTH_HAVE_PROTOBUF
+#cmakedefine OSGEARTH_HAVE_GEOS
+#cmakedefine OSGEARTH_HAVE_DRACO
+#cmakedefine OSGEARTH_HAVE_GEOCODER
+#cmakedefine OSGEARTH_HAVE_BLEND2D
+
+#endif // OSGEARTH_BUILDCONFIG_H

src/osgEarth/CMakeLists.txt

@@ -47,6 +47,10 @@ set(OSGEARTH_VERSION_HEADER "${OSGEARTH_BUILDTIME_INCLUDE_DIR}/osgEarth/Version"
 message(STATUS "Creating ${OSGEARTH_VERSION_HEADER}")
 configure_file(Version.in ${OSGEARTH_VERSION_HEADER})
 
+set(OSGEARTH_BUILDCONFIG_HEADER "${OSGEARTH_BUILDTIME_INCLUDE_DIR}/osgEarth/BuildConfig")
+message(STATUS "Creating ${OSGEARTH_BUILDCONFIG_HEADER}")
+configure_file(BuildConfig.in ${OSGEARTH_BUILDCONFIG_HEADER})
+
 # Name all the library files
 SET(LIB_NAME osgEarth)
 
@@ -920,19 +924,15 @@ ENDIF(BLOSC_FOUND)
 
 # GEOS support?
 IF (GEOS_FOUND)
-    ADD_DEFINITIONS(-DOSGEARTH_HAVE_GEOS)
     INCLUDE_DIRECTORIES(${GEOS_INCLUDE_DIR})
     LINK_WITH_VARIABLES(${LIB_NAME} GEOS_LIBRARY)
 ENDIF(GEOS_FOUND)
 
 # Protobuf/MVT?
-IF(Protobuf_FOUND AND Protobuf_PROTOC_EXECUTABLE)
-
-  ADD_DEFINITIONS(-DOSGEARTH_HAVE_MVT)
+IF(Protobuf_FOUND AND Protobuf_PROTOC_EXECUTABLE)  
   IF (PROTOBUF_USE_DLLS)
     ADD_DEFINITIONS(-DPROTOBUF_USE_DLLS)
   ENDIF()
-
   LINK_WITH_VARIABLES(${LIB_NAME} Protobuf_LIBRARIES)
 ENDIF()
 
@@ -944,7 +944,6 @@ IF(FILEGDB_FOUND)
 ENDIF()
 
 IF(BLEND2D_FOUND)
-    add_definitions(-DOSGEARTH_HAVE_BLEND2D)
     include_directories(${BLEND2D_INCLUDES})
     link_with_variables(${LIB_NAME} BLEND2D_LIBRARY)
 ENDIF()

src/osgEarth/Common

@@ -21,6 +21,7 @@
 
 #include <osgEarth/Export>
 #include <osgEarth/Notify>
+#include <osgEarth/BuildConfig>
 #include <osg/ref_ptr>
 #include <osg/Referenced>
 #include <memory>

src/osgEarth/FeatureRasterizer.cpp

@@ -23,6 +23,7 @@
 #include <osgEarth/FeatureSource>
 #include <osgEarth/StyleSheet>
 #include <osgText/String>
+#include <osgEarth/BuildConfig>
 
 using namespace osgEarth;
 

src/osgEarth/GEOS

@@ -20,9 +20,10 @@
 #ifndef OSGEARTHSYMBOLOGY_GEOS_H
 #define OSGEARTHSYMBOLOGY_GEOS_H 1
 
+#include <osgEarth/Common>
+
 #ifdef OSGEARTH_HAVE_GEOS
 
-#include <osgEarth/Common>
 #include <osgEarth/Style>
 #include <osgEarth/Geometry>
 

src/osgEarth/GEOS.cpp

@@ -16,9 +16,10 @@
  * You should have received a copy of the GNU Lesser General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>
  */
+#include <osgEarth/GEOS>
+
 #ifdef OSGEARTH_HAVE_GEOS
 
-#include <osgEarth/GEOS>
 #include <osg/Notify>
 
 using namespace osgEarth;

src/osgEarth/ImGui/ImGuiApp

@@ -43,6 +43,7 @@
 #include "CameraGUI"
 #include "RenderingGUI"
 #include "AnnotationsGUI"
+#include <osgEarth/BuildConfig>
 
 #include <osgDB/ReadFile>
 

src/osgEarth/ImGui/LayersGUI

@@ -49,6 +49,7 @@
 #endif
 #endif
 
+#include <osgEarth/BuildConfig>
 #include <osgEarth/Registry>
 #include <osgEarth/XYZ>
 #include <osgEarth/TMS>

src/osgEarth/MVT

@@ -19,11 +19,13 @@
 #ifndef OSGEARTH_FEATURES_MVT
 #define OSGEARTH_FEATURES_MVT 1
 
+
 #include <osgEarth/Common>
-#include <osgEarth/FeatureSource>
 
 #ifdef OSGEARTH_HAVE_MVT
 
+#include <osgEarth/FeatureSource>
+
 namespace osgEarth { namespace MVT 
 {
     //! Reads features from an MVT stream for the specified tile.
@@ -48,8 +50,6 @@ namespace osgEarth { namespace MVT
 } } // osgEarth::MVT
 
 
-#ifdef OSGEARTH_HAVE_SQLITE3
-
 namespace osgEarth
 {
     /**
@@ -116,9 +116,9 @@ namespace osgEarth
 
 OSGEARTH_SPECIALIZE_CONFIG(osgEarth::MVTFeatureSource::Options);
 
-#endif // OSGEARTH_HAVE_SQLITE3
-
-#endif // OSGEARTH_HAVE_MVT
+#else
+#pragma message("osgEarth was not built with MVT support")
+#endif
 
 #endif // OSGEARTH_FEATURES_MVT
 

src/osgEarth/MVT.cpp

@@ -16,10 +16,11 @@
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>
 */
-#ifdef OSGEARTH_HAVE_MVT
 
 #include <osgEarth/MVT>
 
+#ifdef OSGEARTH_HAVE_MVT
+
 #include <osgEarth/Registry>
 #include <osgEarth/FileUtils>
 #include <osgEarth/GeoData>
@@ -30,9 +31,7 @@
 #include <stdlib.h>
 #include "vector_tile.pb.h"
 
-#ifdef OSGEARTH_HAVE_SQLITE3
 #include <sqlite3.h>
-#endif
 
 using namespace osgEarth;
 using namespace osgEarth::MVT;

src/osgEarth/MapboxGLImageLayer.cpp

@@ -260,7 +260,7 @@ void MapBoxGL::StyleSheet::Source::loadFeatureSource(const std::string& styleShe
         }
         else if (type() == "vector-mbtiles")
         {
-#if defined(OSGEARTH_HAVE_MVT) && defined(OSGEARTH_HAVE_SQLITE3)
+#if defined(OSGEARTH_HAVE_MVT)
             URI uri(url(), context);
 
             osg::ref_ptr< MVTFeatureSource > featureSource = new MVTFeatureSource();