Fix problem with linking on Linux using static library and

relocation problems in the code.

In order to be able to link on Linux to other shared libraries,
while compiling e.g. a static webui library, the -fPIC
is necessary. This has been tested on Linux.

Signed-off-by: Hans Dijkema <hans@dijkewijk.nl>

Author: hdijkema

CMakeLists.txt

@@ -12,6 +12,22 @@ set(CMAKE_CXX_STANDARD_REQUIRED ON)
 set(CMAKE_C_STANDARD 99)
 set(CMAKE_C_STANDARD_REQUIRED ON)
 
+
+# In order to be able to link on Linux to other shared libraries,
+# while compiling e.g. a static webui library, the -fPIC
+# is necessary. This has been tested on Linux.
+if (CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
+  # using Clang
+  add_compile_options(-fPIC)
+elseif (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
+  # using GCC
+  add_compile_options(-fPIC)
+elseif (CMAKE_CXX_COMPILER_ID STREQUAL "Intel")
+  # using Intel C++
+elseif (CMAKE_CXX_COMPILER_ID STREQUAL "MSVC")
+  # using Visual Studio C++
+endif()
+
 # Variables for library names, source files, etc.
 set(WEBUI_DEFAULT_OUT_LIB_NAME "webui-2")
 
@@ -118,4 +134,4 @@ if (WEBUI_BUILD_EXAMPLES)
     if (MSVC)
         set_property(DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR} PROPERTY VS_STARTUP_PROJECT call_js_from_cpp)
     endif()
-endif()
+endif()