Assert our addiction to GDAL and PROJ, and make them required dependencies

Because:
- this was already the case. branch-7-4 does not even compile without them.
- the sheer number of places where they were needed is an evidence that MapServer
  is not MapServer without them
- it makes the code easier to comprehend.

Author: rouault

Diff for: CMakeLists.txt

@@ -119,7 +119,6 @@ int main(int argc, char **argv) {
 include_directories(${CMAKE_CURRENT_BINARY_DIR})
 
 #options suported by the cmake builder
-option(WITH_PROJ "Choose if reprojection support should be built in" ON)
 option(WITH_PROTOBUFC "Choose if protocol buffers support should be built in (required for vector tiles)" ON)
 option(WITH_KML "Enable native KML output support (requires libxml2 support)" OFF)
 option(WITH_SOS "Enable SOS Server support (requires PROJ and libxml2 support)" OFF)
@@ -134,8 +133,6 @@ option(WITH_MYSQL "Choose if MYSQL joining support should be built in" OFF)
 option(WITH_FCGI "Choose if FastCGI support should be built in" ON)
 option(WITH_GEOS "Choose if GEOS geometry operations support should be built in" ON)
 option(WITH_POSTGIS "Choose if Postgis input support should be built in" ON)
-option(WITH_GDAL "Choose if GDAL input raster support should be built in" ON)
-option(WITH_OGR "Choose if OGR/GDAL input vector support should be built in" ON)
 option(WITH_CLIENT_WMS "Enable Client WMS Layer support (requires CURL and GDAL support)" OFF)
 option(WITH_CLIENT_WFS "Enable Client WMS Layer support (requires CURL and OGR support)" OFF)
 option(WITH_CURL "Enable Curl HTTP support (required for wms/wfs client, and remote SLD)" OFF)
@@ -388,17 +385,14 @@ ms_link_libraries( ${FREETYPE_LIBRARY})
 list(APPEND ALL_INCLUDE_DIRS ${FREETYPE_INCLUDE_DIR})
 
 
-if(WITH_PROJ)
-  find_package(Proj)
-  if(NOT PROJ_FOUND)
-    report_optional_not_found(PROJ)
- else(NOT PROJ_FOUND)
-    include_directories(${PROJ_INCLUDE_DIR})
-    ms_link_libraries( ${PROJ_LIBRARY})
-    list(APPEND ALL_INCLUDE_DIRS ${PROJ_INCLUDE_DIR})
-    set (USE_PROJ 1)
- endif(NOT PROJ_FOUND)
-endif (WITH_PROJ)
+find_package(Proj)
+if(NOT PROJ_FOUND)
+    report_mandatory_not_found(PROJ)
+endif(NOT PROJ_FOUND)
+
+include_directories(${PROJ_INCLUDE_DIR})
+ms_link_libraries( ${PROJ_LIBRARY})
+list(APPEND ALL_INCLUDE_DIRS ${PROJ_INCLUDE_DIR})
 
 if(USE_PBF)
     include_directories(${PROJECT_BINARY_DIR}/renderers/mvt)
@@ -419,11 +413,7 @@ if(WITH_PIXMAN)
 endif (WITH_PIXMAN)
 
 if(WITH_WMS)
-  if(USE_PROJ)
-    set(USE_WMS_SVR 1)
-  else(USE_PROJ)
-    report_dependency_error(WMS PROJ)
-  endif(USE_PROJ)
+  set(USE_WMS_SVR 1)
 endif(WITH_WMS)
 
 if(WITH_FRIBIDI)
@@ -591,17 +581,14 @@ if(WITH_POSTGIS)
   endif(POSTGRESQL_FOUND)
 endif (WITH_POSTGIS)
 
-if(WITH_GDAL)
-  find_package(GDAL)
-  if(GDAL_FOUND)
-    include_directories(${GDAL_INCLUDE_DIR})
-    ms_link_libraries( ${GDAL_LIBRARY})
-    list(APPEND ALL_INCLUDE_DIRS ${GDAL_INCLUDE_DIR})
-    set (USE_GDAL 1)
-  else(GDAL_FOUND)
-    report_optional_not_found(GDAL)
-  endif(GDAL_FOUND)
-endif (WITH_GDAL)
+find_package(GDAL)
+if(NOT GDAL_FOUND)
+  report_mandatory_not_found(GDAL)
+endif(NOT GDAL_FOUND)
+
+include_directories(${GDAL_INCLUDE_DIR})
+ms_link_libraries( ${GDAL_LIBRARY})
+list(APPEND ALL_INCLUDE_DIRS ${GDAL_INCLUDE_DIR})
 
 if(WITH_SVGCAIRO)
   if(WITH_RSVG)
@@ -636,25 +623,6 @@ if(WITH_RSVG)
   endif(RSVG_FOUND AND GOBJECT_FOUND)
 endif (WITH_RSVG)
 
-if(WITH_OGR)
-  if(GDAL_FOUND)
-    set (USE_OGR 1)
-  else(GDAL_FOUND)
-    find_package(GDAL)
-    if(GDAL_FOUND)
-      include_directories(${GDAL_INCLUDE_DIR})
-      ms_link_libraries( ${GDAL_LIBRARY})
-      list(APPEND ALL_INCLUDE_DIRS ${GDAL_INCLUDE_DIR})
-      set (USE_OGR 1)
-    else(GDAL_FOUND)
-      message(SEND_ERROR "GDAL library could not be found and is needed for OGR support.
-      HINTS:
-      - disable OGR support by adding -DWITH_OGR=0
-      - add the GDAL install directory to the CMAKE_PREFIX_PATH variable (-DCMAKE_PREFIX_PATH=\"/path/to/${component}-install-dir;/path/to/other/dirs\"")
-    endif(GDAL_FOUND)
-  endif(GDAL_FOUND)
-endif(WITH_OGR)
-
 if(WITH_CLIENT_WMS OR WITH_CLIENT_WFS)
    set(WITH_CURL ON)
 endif(WITH_CLIENT_WMS OR WITH_CLIENT_WFS)
@@ -683,56 +651,19 @@ if(WITH_CLIENT_WMS OR WITH_CLIENT_WFS)
 endif(WITH_CLIENT_WMS OR WITH_CLIENT_WFS)
 
 if(WITH_CLIENT_WMS)
-  if(USE_GDAL AND USE_PROJ)
-    set(USE_WMS_LYR 1)
-  else(USE_GDAL AND USE_PROJ)
-    if(NOT USE_GDAL)
-      report_dependency_error(CLIENT_WMS GDAL)
-    endif(NOT USE_GDAL)
-    if( NOT USE_PROJ)
-      report_dependency_error(CLIENT_WMS PROJ)
-    endif(NOT USE_PROJ)
-  endif(USE_GDAL AND USE_PROJ)
+  set(USE_WMS_LYR 1)
 endif(WITH_CLIENT_WMS)
 
 if(WITH_CLIENT_WFS)
-  if(USE_OGR AND USE_PROJ)
-    set(USE_WFS_LYR 1)
-  else(USE_OGR AND USE_PROJ)
-    if(NOT USE_OGR)
-      report_dependency_error(CLIENT_WFS OGR)
-    endif(NOT USE_OGR)
-    if( NOT USE_PROJ)
-      report_dependency_error(CLIENT_WFS PROJ)
-    endif(NOT USE_PROJ)
-  endif(USE_OGR AND USE_PROJ)
+  set(USE_WFS_LYR 1)
 endif(WITH_CLIENT_WFS)
 
 if(WITH_WFS)
-  if(USE_PROJ AND USE_OGR)
-    set(USE_WFS_SVR 1)
-    #TODO: set WFS_USE_LIBXML2 ?
-  else(USE_PROJ AND USE_OGR)
-    if( NOT USE_OGR)
-      report_dependency_error(WFS OGR)
-    endif( NOT USE_OGR)
-    if( NOT USE_PROJ)
-      report_dependency_error(WFS PROJ)
-    endif( NOT USE_PROJ)
-  endif(USE_PROJ AND USE_OGR)
+  set(USE_WFS_SVR 1)
 endif(WITH_WFS)
 
 if(WITH_WCS)
-  if(USE_PROJ AND USE_GDAL)
-    set(USE_WCS_SVR 1)
-  else(USE_PROJ AND USE_GDAL)
-    if(NOT USE_GDAL)
-      report_dependency_error(WCS GDAL)
-    endif(NOT USE_GDAL)
-    if(NOT USE_PROJ)
-      report_dependency_error(WCS PROJ)
-    endif(NOT USE_PROJ)
-  endif(USE_PROJ AND USE_GDAL)
+  set(USE_WCS_SVR 1)
 endif(WITH_WCS)
 
 if(WITH_LIBXML2)
@@ -758,20 +689,11 @@ if( USE_WFS_SVR AND NOT USE_LIBXML2 )
 endif( USE_WFS_SVR AND NOT USE_LIBXML2 )
 
 if(WITH_SOS)
-    if(NOT USE_OGR)
-      report_dependency_error(WITH_SOS OGR)
-    endif(NOT USE_OGR)
-
-  if(USE_PROJ AND USE_LIBXML2)
+  if(USE_LIBXML2)
     set(USE_SOS_SVR 1)
-  else(USE_PROJ AND USE_LIBXML2)
-    if(NOT USE_LIBXML2)
-      report_dependency_error(SOS LIBXML2)
-    endif(NOT USE_LIBXML2)
-    if(NOT USE_PROJ)
-      report_dependency_error(SOS PROJ)
-    endif(NOT USE_PROJ)
-  endif(USE_PROJ AND USE_LIBXML2)
+  else(USE_LIBXML2)
+    report_dependency_error(SOS LIBXML2)
+  endif(USE_LIBXML2)
 endif(WITH_SOS)
 
 if(WITH_POINT_Z_M)
@@ -944,12 +866,12 @@ endmacro()
 
 message(STATUS "* Summary of configured options for this build")
 message(STATUS " * Mandatory components")
+message(STATUS "  * GDAL: ${GDAL_LIBRARY}")
+message(STATUS "  * PROJ: ${PROJ_LIBRARY}")
 message(STATUS "  * png: ${PNG_LIBRARY}")
 message(STATUS "  * jpeg: ${JPEG_LIBRARY}")
 message(STATUS "  * freetype: ${FREETYPE_LIBRARY}")
 message(STATUS " * Optional components")
-status_optional_component("GDAL" "${USE_GDAL}" "${GDAL_LIBRARY}")
-status_optional_component("OGR" "${USE_OGR}" "${GDAL_LIBRARY}")
 status_optional_component("GIF" "${USE_GIF}" "${GIF_LIBRARY}")
 status_optional_component("MYSQL" "${USE_MYSQL}" "${MYSQL_LIBRARY}")
 status_optional_component("FRIBIDI" "${USE_FRIBIDI}" "${FRIBIDI_LIBRARY}")
@@ -959,7 +881,6 @@ status_optional_component("CAIRO" "${USE_CAIRO}" "${CAIRO_LIBRARY}")
 status_optional_component("SVGCAIRO" "${USE_SVG_CAIRO}" "${SVGCAIRO_LIBRARY}")
 status_optional_component("RSVG" "${USE_RSVG}" "${RSVG_LIBRARY}")
 status_optional_component("CURL" "${USE_CURL}" "${CURL_LIBRARY}")
-status_optional_component("PROJ" "${USE_PROJ}" "${PROJ_LIBRARY}")
 status_optional_component("PIXMAN" "${USE_PIXMAN}" "${PIXMAN_LIBRARY}")
 status_optional_component("LIBXML2" "${USE_LIBXML2}" "${LIBXML2_LIBRARY}")
 status_optional_component("POSTGIS" "${USE_POSTGIS}" "${POSTGRESQL_LIBRARY}")

Diff for: classobject.c

@@ -31,12 +31,6 @@
 
 #include "mapserver.h"
 
-#ifdef USE_GDAL
-#  include "gdal.h"
-#  include "cpl_conv.h"
-#endif
-
-
 
 /*
 ** Add a label to a classObj (order doesn't matter for labels like it does with styles)

Diff for: hittest.c

@@ -172,10 +172,8 @@ int msHitTestLayer(mapObj *map, layerObj *layer, layer_hittest *hittest) {
     /* identify target shapes */
     if(layer->transform == MS_TRUE) {
       searchrect = map->extent;
-#ifdef USE_PROJ
       if((map->projection.numargs > 0) && (layer->projection.numargs > 0))
         msProjectRect(&map->projection, &layer->projection, &searchrect); /* project the searchrect to source coords */
-#endif
     }
     else {
       searchrect.minx = searchrect.miny = 0;

Diff for: kerneldensity.c

@@ -28,7 +28,6 @@
 
 #include "mapserver.h"
 #include <float.h>
-#ifdef USE_GDAL
 
 #include "gdal.h"
 #include "cpl_string.h"
@@ -180,11 +179,9 @@ int msComputeKernelDensityDataset(mapObj *map, imageObj *image, layerObj *kernel
     searchrect.maxy = map->height-1;
   }
 
-#ifdef USE_PROJ
   layer->project = msProjectionsDiffer(&(layer->projection), &(map->projection));
   if(layer->project)
     msProjectRect(&map->projection, &layer->projection, &searchrect); /* project the searchrect to source coords */
-#endif
 
   status = msLayerWhichShapes(layer, searchrect, MS_FALSE);
     /* nothing to do */
@@ -199,7 +196,7 @@ int msComputeKernelDensityDataset(mapObj *map, imageObj *image, layerObj *kernel
       double weight = 1.0;
       if(!values) /* defer allocation until we effectively have a feature */
         values = (float*) msSmallCalloc(im_width * im_height, sizeof(float));
-#ifdef USE_PROJ
+
       if(layer->project)
       {
         if( layer->reprojectorLayerToMap == NULL )
@@ -215,8 +212,7 @@ int msComputeKernelDensityDataset(mapObj *map, imageObj *image, layerObj *kernel
         }
         msProjectShapeEx(layer->reprojectorLayerToMap, &shape);
       }
-#endif
-      
+
       /* the weight for the sample is set to 1.0 by default. If the
        * layer has some classes defined, we will read the weight from
        * the class->style->size (which can be binded to an attribute)
@@ -345,15 +341,6 @@ int msComputeKernelDensityDataset(mapObj *map, imageObj *image, layerObj *kernel
   }
   return status;
 }
-#else
-
-
-int msComputeKernelDensityDataset(mapObj *map, imageObj *image, layerObj *layer, void **hDSvoid, void **cleanup_ptr) {
-    msSetError(MS_MISCERR,"msComputeKernelDensityDataset()", "KernelDensity layers require GDAL support, however GDAL support is not compiled in this build");
-    return MS_FAILURE;
-}
-
-#endif
 
 int msCleanupKernelDensityDataset(mapObj *map, imageObj *image, layerObj *layer, void *cleanup_ptr) {
   free(cleanup_ptr);

Diff for: layerobject.c

@@ -31,12 +31,6 @@
 
 #include "mapserver.h"
 
-#ifdef USE_GDAL
-#  include "gdal.h"
-#  include "cpl_conv.h"
-#endif
-
-
 
 /* ===========================================================================
    msInsertClass

Diff for: mapcairo.c

@@ -55,10 +55,8 @@
 #endif
 #endif
 
-#ifdef USE_GDAL
 #include <cpl_string.h>
 #include <gdal.h>
-#endif
 
 #include "fontcache.h"
 
@@ -537,9 +535,6 @@ imageObj* createImageCairo(int width, int height, outputFormatObj *format,colorO
 
 static void msTransformToGeospatialPDF(imageObj *img, mapObj *map, cairo_renderer *r)
 {
-  /* We need a GDAL 1.10 PDF driver at runtime, but as far as the C API is concerned, GDAL 1.9 is */
-  /* largely sufficient. */
-#if defined(USE_GDAL) && defined(GDAL_VERSION_NUM) && GDAL_VERSION_NUM >= 1900
   GDALDatasetH hDS = NULL;
   const char* pszGEO_ENCODING = NULL;
   GDALDriverH hPDFDriver = NULL;
@@ -646,7 +641,6 @@ static void msTransformToGeospatialPDF(imageObj *img, mapObj *map, cairo_rendere
   VSIUnlink(pszTmpFilename);
 
   msFree(pszTmpFilename);
-#endif
 }
 
 int saveImageCairo(imageObj *img, mapObj *map, FILE *fp, outputFormatObj *format)

Diff for: mapchart.c

@@ -249,7 +249,7 @@ int getNextShape(mapObj *map, layerObj *layer, double *values, int *nvalues, sty
   int c;
   status = msLayerNextShape(layer, shape);
   if(status == MS_SUCCESS) {
-#ifdef USE_PROJ
+
     if(layer->project)
     {
       if( layer->reprojectorLayerToMap == NULL )
@@ -263,7 +263,6 @@ int getNextShape(mapObj *map, layerObj *layer, double *values, int *nvalues, sty
       }
       msProjectShapeEx(layer->reprojectorLayerToMap, shape);
     }
-#endif
 
     if(msBindLayerToShape(layer, shape, MS_DRAWMODE_FEATURES|MS_DRAWMODE_LABELS) != MS_SUCCESS)
       return MS_FAILURE; /* error message is set in msBindLayerToShape() */
@@ -372,9 +371,9 @@ int msDrawPieChartLayer(mapObj *map, layerObj *layer, imageObj *image)
       return MS_FAILURE;
     }
   }
-#ifdef USE_PROJ
+
   layer->project = msProjectionsDiffer(&(layer->projection), &(map->projection));
-#endif
+
   /* step through the target shapes */
   msInitShape(&shape);
 
@@ -631,10 +630,8 @@ int msDrawChartLayer(mapObj *map, layerObj *layer, imageObj *image)
       searchrect.maxy = map->height-1;
     }
 
-#ifdef USE_PROJ
     if((map->projection.numargs > 0) && (layer->projection.numargs > 0))
       msProjectRect(&map->projection, &layer->projection, &searchrect); /* project the searchrect to source coords */
-#endif
 
     status = msLayerWhichShapes(layer, searchrect, MS_FALSE);
     if(status == MS_DONE) { /* no overlap */