Check for SO_MARK in CMake build (#9854)

* Add support for POSIX Cap in CMake build (#9852)

This adds a new CMake option that is ON by default: ENABLE_POSIX_CAP.
If POSIX cap is not found, the configure step will fail and the user
must disable the feature explicitly.

* Fix file name

* Fix typo

* Use check_symbol_exists instead of a compile check

Author: JosiahWI

CMakeLists.txt

@@ -159,12 +159,12 @@ include(find_ccache)
 
 # Check for IO faculties
 check_symbol_exists(IN6_IS_ADDR_UNSPECIFIED "netinet/in.h" TS_HAS_IN6_IS_ADDR_UNSPECIFIED)
+check_symbol_exists(SO_MARK "sys/socket.h" TS_HAS_SO_MARK)
 check_symbol_exists(TLS1_3_VERSION "${OPENSSL_INCLUDE_DIR}/openssl/ssl.h" TS_USE_TLS13)
 check_symbol_exists(OPENSSL_NO_TLS1_3 "${OPENSSL_INCLUDE_DIR}/ssl.h" TS_NO_USE_TLS13)
 if(TS_NO_USE_TLS13)
     set(TS_USE_TLS13 FALSE CACHE)
 endif()
-
 check_symbol_exists(epoll_create "sys/epoll.h" TS_USE_EPOLL)
 check_symbol_exists(kqueue "sys/event.h" TS_USE_KQUEUE)
 set(CMAKE_REQUIRED_LIBRARIES uring)

include/tscore/ink_config.h.cmake.in

@@ -116,6 +116,7 @@ const int DEFAULT_STACKSIZE = @DEFAULT_STACK_SIZE@;
 #cmakedefine01 TS_HAS_JEMALLOC
 #cmakedefine01 TS_HAS_TCMALLOC
 #cmakedefine01 TS_HAS_PROFILER
+#cmakedefine01 TS_HAS_SO_MARK
 #cmakedefine01 TS_USE_DIAGS
 #cmakedefine01 TS_USE_EPOLL
 #cmakedefine01 TS_USE_FAST_SDK