commit 37e92792370a479c8f88ccef2b9df4666fd53fe4
Author: Renzo Davoli <renzo@cs.unibo.it>
Date:   Mon Jan 2 12:09:17 2023 +0100

    contrib/port/unix/lib: exclude slipif.c source

diff --git a/contrib/ports/unix/lib/CMakeLists.txt b/contrib/ports/unix/lib/CMakeLists.txt
index 93d17bd0..4952a6e5 100644
--- a/contrib/ports/unix/lib/CMakeLists.txt
+++ b/contrib/ports/unix/lib/CMakeLists.txt
@@ -22,6 +22,8 @@ set (LWIP_INCLUDE_DIRS
 include(${LWIP_CONTRIB_DIR}/ports/unix/Filelists.cmake)
 include(${LWIP_DIR}/src/Filelists.cmake)
 
+list(REMOVE_ITEM lwipnoapps_SRCS ${LWIP_DIR}/src/netif/slipif.c)
+
 add_library(lwip ${lwipnoapps_SRCS} ${lwipcontribportunix_SRCS} ${lwipcontribportunixnetifs_SRCS})
 target_compile_options(lwip PRIVATE ${LWIP_COMPILER_FLAGS})
 target_compile_definitions(lwip PRIVATE ${LWIP_DEFINITIONS} ${LWIP_MBEDTLS_DEFINITIONS})