cmake: Use correct proj target

See-Also: https://proj.org/en/stable/development/cmake.html

cmake/FindCGAL.cmake

@@ -47,7 +47,7 @@ else()
         set(CGAL_Boost_USE_STATIC_LIBS "${Boost_USE_STATIC_LIBS}")
     endif()
     find_package(CGAL CONFIG)
-    if(NOT CGAL::CGAL)
+    if(NOT CGAL_FOUND)
         message(
             FATAL_ERROR
             "CGAL_SUPPORT enabled, but CGAL_INCLUDE_DIR wasn't provided and CGAL package couldn't be found."
@@ -56,5 +56,5 @@ else()
     message(STATUS "CGAL: found config at '${CGAL_DIR}'.")
 endif()
 
-target_compile_definitions(CGAL::CGAL INTERFACE IFOPSH_WITH_CGAL)
+target_compile_definitions(CGAL INTERFACE IFOPSH_WITH_CGAL)
 set(SWIG_DEFINES ${SWIG_DEFINES} -DIFOPSH_WITH_CGAL)

cmake/FindPROJ.cmake

@@ -0,0 +1,63 @@
+#
+# Input variables:
+# - `PROJ_INCLUDE_DIR`
+# - `PROJ_LIBRARIES`
+# If input variables are not specified, try to find PROJ config.
+# Input variables could also be provided as environment variables.
+#
+# Output variables:
+# - `PROJ_INCLUDE_DIR`
+# - `PROJ_LIBRARIES`
+#
+
+# To avoid cyclic calls to this file
+list(REMOVE_ITEM CMAKE_MODULE_PATH ${CMAKE_SOURCE_DIR})
+
+UNIFY_ENVVARS_AND_CACHE(PROJ_INCLUDE_DIR)
+UNIFY_ENVVARS_AND_CACHE(PROJ_LIBRARIES)
+
+if((NOT PROJ_INCLUDE_DIR AND NOT PROJ_LIBRARIES))
+    find_package(PROJ QUIET CONFIG)
+
+    if(NOT PROJ_FOUND)
+        find_path(PROJ_INCLUDE_DIR proj.h
+            PATHS
+                /usr/include/proj
+            REQUIRED
+        )
+        if(PROJ_INCLUDE_DIR)
+            message(STATUS "Found PROJ include files in: ${PROJ_INCLUDE_DIR}")
+        else()
+            message(FATAL_ERROR "Unable to find PROJ include directory, specify PROJ_INCLUDE_DIR manually.")
+        endif()
+
+        find_library(PROJ_LIBRARY
+            NAMES proj
+            PATHS /usr/lib/x86_64-linux-gnu)
+        if(PROJ_LIBRARY)
+            message(STATUS "PROJ libraries ${PROJ_LIBRARY} found in: ${PROJ_LIBRARY_DIR}")
+            set(PROJ_LIBRARIES ${PROJ_LIBRARY})
+        else()
+            message(FATAL_ERROR "Unable to find PROJ libraries in: ${PROJ_LIBRARY_DIR}")
+        endif()
+
+        add_library(PROJ::proj INTERFACE IMPORTED)
+        target_include_directories(PROJ::proj INTERFACE "${PROJ_INCLUDE_DIR}")
+        target_link_libraries(PROJ::proj INTERFACE ${PROJ_LIBRARIES})
+        target_link_directories(PROJ::proj INTERFACE "${PROJ_LIBRARY}")
+    endif()
+else()
+    find_library(PROJ_LIBRARY
+        NAMES proj
+        PATHS ${PROJ_LIBRARY_DIR})
+    if(PROJ_LIBRARY)
+        message(STATUS "PROJ libraries ${PROJ_LIBRARY} found in: ${PROJ_LIBRARY_DIR}")
+        set(PROJ_LIBRARIES ${PROJ_LIBRARY})
+    else()
+        message(FATAL_ERROR "Unable to find PROJ libraries in: ${PROJ_LIBRARY_DIR}")
+    endif()
+
+    set(PROJ_INCLUDE_DIR ${PROJ_INCLUDE_DIR} CACHE FILEPATH "PROJ header files")
+    message(STATUS "Looking for PROJ include files in: ${PROJ_INCLUDE_DIR}")
+    include_directories(${PROJ_INCLUDE_DIR})
+endif()

src/serializers/CMakeLists.txt

@@ -9,12 +9,12 @@ set_target_properties(Serializers PROPERTIES COMPILE_FLAGS "-DSERIALIZERS_EXPORT
 set(SERIALIZER_SCHEMA_LIBRARIES Serializers ${SERIALIZER_SCHEMA_LIBRARIES} PARENT_SCOPE)
 
 if(WITH_PROJ)
-    find_package(proj REQUIRED)
+    find_package(PROJ REQUIRED)
     target_compile_definitions(Serializers PRIVATE "WITH_PROJ")
     if(PROJ_STATIC)
         target_compile_definitions(Serializers PRIVATE "PROJ_DLL=")
     endif()
-    target_link_libraries(Serializers PRIVATE proj::proj)
+    target_link_libraries(Serializers PRIVATE PROJ::proj)
 endif()
 
 target_link_libraries(Serializers