[glib]Fix missing dependency selinux. (#7988)

* [glib]Fix missing dependency selinux.

* [glib]Improve warning message.

* [sdl1]Set selinux to a feature.

* Update portfile.cmake

ports/glib/CMakeLists.txt

@@ -253,8 +253,14 @@ if(WIN32)
     target_link_libraries(gio PRIVATE ws2_32 shlwapi dnsapi iphlpapi advapi32 shell32)
 elseif(APPLE)
     target_link_libraries(gio PRIVATE xdgmime kqueue)
+    if (HAVE_SELINUX)
+        target_link_libraries(gio PRIVATE selinux)
+    endif()
 else()
     target_link_libraries(gio PRIVATE xdgmime inotify)
+    if (HAVE_SELINUX)
+        target_link_libraries(gio PRIVATE selinux)
+    endif()
 endif()
 list(APPEND GLIB_TARGETS gio)
 

ports/glib/CONTROL

@@ -3,3 +3,6 @@ Version: 2.52.3-14-3
 Homepage: https://developer.gnome.org/glib/
 Description: Portable, general-purpose utility library.
 Build-Depends: zlib, pcre, libffi, gettext, libiconv
+
+Feature: selinux
+Description: Build with selinux support.

ports/glib/portfile.cmake

@@ -32,10 +32,18 @@ file(REMOVE_RECURSE ${SOURCE_PATH}/glib/pcre)
 file(WRITE ${SOURCE_PATH}/glib/pcre/Makefile.in)
 file(REMOVE ${SOURCE_PATH}/glib/win_iconv.c)
 
+if (selinux IN_LIST FEATURES AND NOT VCPKG_TARGET_IS_WINDOWS AND NOT EXISTS "/usr/include/selinux")
+    message("Selinux was not found in its typical system location. Your build may fail. You can install Selinux with \"apt-get install selinux\".")
+endif()
+
+vcpkg_check_features(OUT_FEATURE_OPTIONS FEATURE_OPTIONS
+    selinux HAVE_SELINUX
+)
+
 vcpkg_configure_cmake(
     SOURCE_PATH ${SOURCE_PATH}
     PREFER_NINJA
-    OPTIONS
+    OPTIONS ${FEATURE_OPTIONS}
         -DGLIB_VERSION=${GLIB_VERSION}
     OPTIONS_DEBUG
         -DGLIB_SKIP_HEADERS=ON