Remove source files from INTERFACE add_library (#210)

* Remove source files from add_library
* Enable examples and tests for CMake min-req check.
closes #209

Author: Thalhammer

.github/workflows/cmake.yml

@@ -66,11 +66,13 @@ jobs:
           make -j $(nproc)
           sudo make install
 
+      - uses: ./.github/actions/install/gtest
+
       - name: setup
         run: |
           mkdir build
           cd build
-          cmake .. -DJWT_BUILD_EXAMPLES=OFF
+          cmake .. -DJWT_BUILD_EXAMPLES=ON -DJWT_BUILD_TESTS=ON
           sudo make install
 
       - name: test

cmake/private-find-kazuho-picojson.cmake

@@ -5,6 +5,6 @@ endif()
 unset(PICOJSON_INCLUDE_DIR CACHE)
 find_path(PICOJSON_INCLUDE_DIR "picojson/picojson.h")
 if(EXISTS "${PICOJSON_INCLUDE_DIR}/picojson/picojson.h")
-  add_library(kazuho_picojson INTERFACE "${PICOJSON_INCLUDE_DIR}/picojson/picojson.h")
+  add_library(kazuho_picojson INTERFACE)
   target_include_directories(kazuho_picojson INTERFACE ${PICOJSON_INCLUDE_DIR})
 endif()