Add -fPIC for linux shared library config

Author: flexferrum

.github/workflows/linux-build.yml

@@ -89,7 +89,8 @@ jobs:
         compiler: [5.0, 6.0, 7, 8]
         base-flags: ["", -DJINJA2CPP_CXX_STANDARD=17]
         build-config: [Release, Debug]
-        
+        build-shared: [TRUE, FALSE]
+
         include:
           - compiler: 5.0
             docker-image: conanio/clang50
@@ -114,6 +115,7 @@ jobs:
         INPUT_BASE_FLAGS: ${{ matrix.base-flags }}
         INPUT_BASE_CONFIG: ${{ matrix.build-config }}
         INPUT_EXTRA_FLAGS: ${{ matrix.extra-flags }}
+        INPUT_BUILD_SHARED: ${{ matrix.build-shared }}
         HOME: /home/conan
       run: |
         export BUILD_TARGET=all
@@ -124,7 +126,7 @@ jobs:
         export EXTRA_FLAGS="${INPUT_BASE_FLAGS} ${INPUT_EXTRA_FLAGS}"
         mkdir $BUILD_DIRECTORY && cd $BUILD_DIRECTORY
         sudo chmod gou+rw -R $WORKSPACE
-        cmake $CMAKE_OPTS -DCMAKE_BUILD_TYPE=$BUILD_CONFIG -DCMAKE_CXX_FLAGS=$CMAKE_CXX_FLAGS -DJINJA2CPP_DEPS_MODE=internal $EXTRA_FLAGS $WORKSPACE && cmake --build . --config $BUILD_CONFIG --target all -- -j4
+        cmake $CMAKE_OPTS -DCMAKE_BUILD_TYPE=$BUILD_CONFIG -DCMAKE_CXX_FLAGS=$CMAKE_CXX_FLAGS -DJINJA2CPP_DEPS_MODE=internal -DJINJA2CPP_BUILD_SHARED=$INPUT_BUILD_SHARED $EXTRA_FLAGS $WORKSPACE && cmake --build . --config $BUILD_CONFIG --target all -- -j4
 
     - name: Test
       run: |

CMakeLists.txt

@@ -15,7 +15,7 @@ endif()
 set(JINJA2CPP_SANITIZERS address+undefined memory)
 set(JINJA2CPP_WITH_SANITIZERS none CACHE STRING "Build with sanitizer")
 set_property(CACHE JINJA2CPP_WITH_SANITIZERS PROPERTY STRINGS ${JINJA2CPP_SANITIZERS})
-set (JINJA2CPP_DEPS_MODE "external" CACHE STRING "Jinja2Cpp dependency management mode (internal | external | external-boost | conan-build). See documentation for details. 'interal' is default.")
+set(JINJA2CPP_DEPS_MODE "external" CACHE STRING "Jinja2Cpp dependency management mode (internal | external | external-boost | conan-build). See documentation for details. 'interal' is default.")
 option(JINJA2CPP_BUILD_TESTS "Build Jinja2Cpp unit tests" ${JINJA2CPP_IS_MAIN_PROJECT})
 option(JINJA2CPP_STRICT_WARNINGS "Enable additional warnings and treat them as errors" ON)
 option(JINJA2CPP_BUILD_SHARED "Build shared linkage version of Jinja2Cpp" OFF)
@@ -25,13 +25,17 @@ if (DEFINED BUILD_SHARED_LIBS)
     set(JINJA2CPP_BUILD_SHARED BUILD_SHARED_LIBS)
 endif ()
 
+if (JINJA2CPP_BUILD_SHARED)
+    set(JINJA2CPP_PIC ON)
+endif ()
+
 if (NOT JINJA2CPP_DEPS_MODE)
-    set (JINJA2CPP_DEPS_MODE "internal")
+    set(JINJA2CPP_DEPS_MODE "internal")
 endif ()
 
 if (JINJA2CPP_IS_MAIN_PROJECT OR NOT CMAKE_CXX_STANDARD)
-    set (JINJA2CPP_CXX_STANDARD 14 CACHE STRING "Jinja2Cpp C++ standard to build with. C++14 is default")
-    set (CMAKE_CXX_STANDARD ${JINJA2CPP_CXX_STANDARD})
+    set(JINJA2CPP_CXX_STANDARD 14 CACHE STRING "Jinja2Cpp C++ standard to build with. C++14 is default")
+    set(CMAKE_CXX_STANDARD ${JINJA2CPP_CXX_STANDARD})
 endif ()
 
 if (NOT JINJA2CPP_CXX_STANDARD)