[PATCH ustream-ssl 2/2] cmake: Fail if undefined symbols are used

[Rosen Penev]

On Sat, Nov 11, 2023 at 1:35 PM Hauke Mehrtens <hauke at hauke-m.de> wrote:
>
> Make the linking of the shared library fail when undefined symbols are
> used. Linking undefined symbols in a shared library normally works and
> the linking of the binary using the shared library fails. We also
> compile some example applications and they failed already.
>
> Signed-off-by: Hauke Mehrtens <hauke at hauke-m.de>
> ---
>  CMakeLists.txt | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/CMakeLists.txt b/CMakeLists.txt
> index 2de6590..f4dca0d 100644
> --- a/CMakeLists.txt
> +++ b/CMakeLists.txt
> @@ -10,6 +10,7 @@ ENDIF()
>  ADD_DEFINITIONS(-Wno-unused-parameter -Wmissing-declarations)
>
>  SET(CMAKE_SHARED_LIBRARY_LINK_C_FLAGS "")
> +SET(CMAKE_SHARED_LINKER_FLAGS "-Wl,--no-undefined")
probably better to convert to meson, which passes this by default.
>
>  IF(MBEDTLS)
>    ADD_DEFINITIONS(-DHAVE_MBEDTLS)
> --
> 2.39.2
>
>
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