creates alternative cmake targets

This adds alternative CMake targets by creating an extra module and
adding it to the cpp_info.build_modules property exposed by recent
Conan versions.

CMakeLists.txt

@@ -138,4 +138,5 @@ write_basic_package_version_file(
 
 install(FILES "${PROJECT_BINARY_DIR}/lp3-mainConfig.cmake"
               "${PROJECT_BINARY_DIR}/lp3-mainConfigVersion.cmake"
+               ${CMAKE_CURRENT_SOURCE_DIR}/cmake/ConanFindModuleExtra.cmake
         DESTINATION lib/cmake/lp3-main)

cmake/ConanFindModuleExtra.cmake

@@ -0,0 +1,19 @@
+# This is included from the find modules generated by Conan. It creates
+# different targets.
+function(create_target_from_conan_name cmake_name conan_name)
+    add_library(${cmake_name} INTERFACE IMPORTED)
+
+    if(${conan_name}_INCLUDE_DIRS)
+        set_target_properties(${cmake_name} PROPERTIES INTERFACE_INCLUDE_DIRECTORIES
+                              "${${conan_name}_INCLUDE_DIRS}")
+    endif()
+    set_property(TARGET ${cmake_name} PROPERTY INTERFACE_LINK_LIBRARIES
+                 "${${conan_name}_LIBRARIES_TARGETS};${${conan_name}_LINKER_FLAGS_LIST}")
+    set_property(TARGET ${cmake_name} PROPERTY INTERFACE_COMPILE_DEFINITIONS
+                 ${${conan_name}_COMPILE_DEFINITIONS})
+    set_property(TARGET ${cmake_name} PROPERTY INTERFACE_COMPILE_OPTIONS
+                 "${${conan_name}_COMPILE_OPTIONS_LIST}")
+endfunction()
+
+
+create_target_from_conan_name(lp3::main lp3-main)

conanfile.py

@@ -38,7 +38,7 @@ def build_requirements(self):
     generators = "cmake_find_package"
 
     exports_sources = (
-        "src/*", "include/*", "demos/*", "tests/*", "CMakeLists.txt"
+        "src/*", "include/*", "demos/*", "tests/*", "CMakeLists.txt", "cmake/*",
     )
 
     def _configed_cmake(self):
@@ -59,3 +59,9 @@ def package(self):
     def package_info(self):
         self.cpp_info.name = "lp3-main"
         self.cpp_info.libs = [ "lp3-main" ]
+        self.cpp_info.build_modules = [
+            os.path.join(
+                self.package_folder,
+                "lib/cmake/lp3-main/ConanFindModuleExtra.cmake"
+            )
+        ]

test_package/CMakeLists.txt

@@ -6,5 +6,5 @@ set(CMAKE_CXX_STANDARD 17)
 find_package(lp3-main REQUIRED)
 
 add_executable(main_test ${CMAKE_CURRENT_SOURCE_DIR}/main_test.cpp)
-target_link_libraries(main_test PUBLIC lp3-main::lp3-main)
+target_link_libraries(main_test PUBLIC lp3::main)
 # add_test(main_test main_test)