Merge pull request #283 from joelg236/cmake-inclusion

C++ cmake fixes

CMakeLists.txt

@@ -314,7 +314,6 @@ if (CIVETWEB_ENABLE_CXX)
   add_cxx_compiler_flag(-Wall)
   add_cxx_compiler_flag(-Wextra)
   add_cxx_compiler_flag(-Wshadow)
-  add_cxx_compiler_flag(-Wsign-conversion)
   add_cxx_compiler_flag(-Wmissing-prototypes)
   add_cxx_compiler_flag(-Weverything)
   add_cxx_compiler_flag(/W4)
@@ -330,7 +329,6 @@ if (CIVETWEB_ENABLE_CXX)
   endif()
   add_cxx_compiler_flag(/WX)
   add_cxx_compiler_flag(-pedantic-errors)
-  add_cxx_compiler_flag(-Wzero-as-null-pointer-constant)
   add_cxx_compiler_flag(-fvisibility=hidden)
   add_cxx_compiler_flag(-fstack-protector-strong RELEASE)
   add_cxx_compiler_flag(-flto RELEASE)

src/CMakeLists.txt

@@ -45,7 +45,7 @@ if (CIVETWEB_ENABLE_SLL AND NOT CIVETWEB_ENABLE_OPENSLL_DYNAMIC_LOADING)
 else()
   find_package(LibDl)
   if (LIBDL_FOUND)
-    target_link_libraries(c-library LIBDL::LIBDL)
+    target_link_libraries(c-library -ldl)
   endif()
 endif()