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unix: Fix linker errors when building without sdevent

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When building without systemd event support (-DLWS_WITH_SDEVENT=OFF) on
a system that has libsystemd headers installed, lib/plat/unix-systemd.c
is build in anyway.
The final libwebsockets library has then references to symbols from
libsystemd even though it won't be linked.

Resulting in the follwoing linker errros:
--
/usr/bin/ld: /usr/local/lib/libwebsockets.so: undefined reference to `sd_is_socket_inet'
/usr/bin/ld: /usr/local/lib/libwebsockets.so: undefined reference to `sd_is_socket_unix'
/usr/bin/ld: /usr/local/lib/libwebsockets.so: undefined reference to `sd_listen_fds'
--

This commit ensures that unix-system.c is only build when LWS_WITH_SDEVENT is set and
the system has libsystemd headers installed.

Signed-off-by: Daniel Danzberger <dd@embedd.com>
This commit is contained in:
Daniel Danzberger 2024-12-02 15:24:23 +01:00
parent 6328231f2a
commit 55e812c784
1 changed files with 1 additions and 1 deletions
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2
lib/plat/unix/CMakeLists.txt
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@ -63,7 +63,7 @@ if (LWS_WITH_NETWORK)
list(APPEND SOURCES plat/unix/unix-resolv.c)
endif()
endif()
if (LWS_HAVE_SYSTEMD_H)
if (LWS_WITH_SDEVENT AND LWS_HAVE_SYSTEMD_H)
list(APPEND SOURCES
plat/unix/unix-systemd.c
)