Use cmake imported targets to let it sort out the compiler flag details

These imported targets passed to target_link_library() are supposed to
handle all the pesky compilation, linkage etc details behind the scenes.
I was pretty sure I was missing a trick with this, but this sure isn't
exactly underlined in the documentation.

Unroll the supposedly helpful loop for handling plugins: turns out doing
this cmake native way is plenty shorter and more obvious too. The unroll
kinda belongs to a separate commit but that'd be rather painful for very
little if any gain.

Fixes: #2269 and a whole class of similar cases, allegedly

1 files changed, 18 insertions, 27 deletions

diff --git a/plugins/CMakeLists.txt b/plugins/CMakeLists.txt
index b662ed2c7..3309c964e 100644
--- a/plugins/CMakeLists.txt
+++ b/plugins/CMakeLists.txt
@@ -1,51 +1,42 @@
-set(plugins prioreset syslog)
+add_library(prioreset MODULE prioreset.c)
+add_library(syslog MODULE syslog.c)
 
 if(WITH_SELINUX)
-	set(selinux_libs ${SELINUX_LDFLAGS})
-	set(selinux_flags ${SELINUX_CFLAGS})
-	list(APPEND plugins selinux)
+	add_library(selinux MODULE selinux.c)
+	target_link_libraries(selinux PRIVATE PkgConfig::SELINUX)
 endif()
 
 if(WITH_DBUS)
-	pkg_check_modules(DBUS dbus-1 REQUIRED)
-	set(systemd_inhibit_libs ${DBUS_LDFLAGS})
-	set(systemd_inhibit_flags ${DBUS_CFLAGS})
-	set(dbus_announce_libs ${DBUS_LDFLAGS})
-	set(dbus_announce_flags ${DBUS_CFLAGS})
-	list(APPEND plugins systemd_inhibit dbus_announce)
+	pkg_check_modules(DBUS REQUIRED IMPORTED_TARGET dbus-1)
+	add_library(systemd_inhibit MODULE systemd_inhibit.c)
+	target_link_libraries(systemd_inhibit PRIVATE PkgConfig::DBUS)
+	add_library(dbus_announce MODULE dbus_announce.c)
+	target_link_libraries(dbus_announce PRIVATE PkgConfig::DBUS)
 endif()
 
-if(WITH_IMA)
-	set(ima_libs imaevm)
-	list(APPEND plugins ima)
+if(WITH_IMAEVM)
+	add_library(ima MODULE ima.c)
+	target_link_libraries(ima PRIVATE imaevm)
 endif()
 
 if(WITH_FAPOLICYD)
-	list(APPEND plugins fapolicyd)
+	add_library(fapolicyd MODULE fapolicyd.c)
 endif()
 
 if(WITH_AUDIT)
-	set(audit_libs ${AUDIT_LDFLAGS})
-	list(APPEND plugins audit)
+	add_library(audit MODULE audit.c)
+	target_link_libraries(audit PRIVATE PkgConfig::AUDIT)
 endif()
 
 if(WITH_FSVERITY)
-	set(fsverity_libs ${FSVERITY_LDFLAGS})
-	list(APPEND plugins fsverity)
+	add_library(fsverity MODULE fsverity.c)
+	target_link_libraries(fsverity PRIVATE PkgConfig::FSVERITY)
 endif()
 
 set(plugindir ${CMAKE_INSTALL_FULL_LIBDIR}/rpm-plugins)
 
+get_property(plugins DIRECTORY PROPERTY BUILDSYSTEM_TARGETS)
 foreach(plugin ${plugins})
-	add_library(${plugin} MODULE ${plugin}.c)
-	set(ln ${plugin}_libs)
-	if (${ln})
-		target_link_libraries(${plugin} PRIVATE ${${ln}})
-	endif()
-	set(fn ${plugin}_flags)
-	if (${fn})
-		target_compile_options(${plugin} PRIVATE ${${fn}})
-	endif()
 	install(TARGETS ${plugin} DESTINATION ${plugindir})
 endforeach()