build-sys: adjust check for obsolete libsystemd-journal

Only support libsystemd, the compat libraries got deprecated a while ago and
dropped entirely in systemd 230.

Fixes #4

Author: martinpitt

Makefile.am

@@ -178,10 +178,10 @@ libutils_la_SOURCES = \
 
 libutils_la_CFLAGS = \
 	$(AM_CFLAGS) \
-	$(LIBSYSTEMD_JOURNAL_CFLAGS)
+	$(LIBSYSTEMD_CFLAGS)
 
 libutils_la_LIBADD = \
-	$(LIBSYSTEMD_JOURNAL_LIBS)
+	$(LIBSYSTEMD_LIBS)
 
 noinst_LTLIBRARIES = libutils.la
 

configure.ac

@@ -62,8 +62,8 @@ AC_CHECK_DECLS([gettid, getrandom], [], [], [[
 #include <linux/random.h>
 ]])
 
-PKG_CHECK_MODULES(LIBSYSTEMD_JOURNAL, [libsystemd-journal >= 221],
-	[], [AC_MSG_ERROR([*** libsystemd-journal libraries not found])])
+PKG_CHECK_MODULES(LIBSYSTEMD, [libsystemd >= 221],
+	[], [AC_MSG_ERROR([*** libsystemd library not found])])
 
 CC_CHECK_FLAGS_APPEND([with_cflags], [CFLAGS], [\
         -pipe \