Support building without gudev

Don't fail the configure step if gudev isn't available. Just skip the
corresponding unit tests in that case.

Fixes #80

Author: martinpitt

Makefile.am

@@ -245,7 +245,12 @@ tests_readbyte_CFLAGS =		\
 	$(AM_CFLAGS)		\
 	$(NULL)
 
-noinst_PROGRAMS += tests/test-umockdev tests/test-ioctl-tree
+noinst_PROGRAMS += tests/test-ioctl-tree
+
+if HAVE_GUDEV
+
+noinst_PROGRAMS += tests/test-umockdev tests/test-umockdev-vala
+CHECKS += tests/test-umockdev tests/test-umockdev-vala
 
 tests_test_umockdev_SOURCES = tests/test-umockdev.c
 
@@ -264,6 +269,27 @@ tests_test_umockdev_LDADD =	\
 	$(GUDEV_LIBS)		\
 	$(NULL)
 
+tests_test_umockdev_vala_SOURCES = 	\
+	tests/test-umockdev-vala.vala	\
+	tests/assertions.vapi		\
+	tests/ioctl.vapi		\
+	src/posix_extra.vapi		\
+	$(NULL)
+
+tests_test_umockdev_vala_CFLAGS = $(GLIB_CFLAGS) $(GUDEV_CFLAGS) -I $(srcdir)/src -I src -w
+tests_test_umockdev_vala_LDADD = $(GLIB_LIBS) $(GUDEV_LIBS) libumockdev.la
+tests_test_umockdev_vala_VALAFLAGS =		\
+	--vapidir tests			\
+	--vapidir $(top_builddir)/src	\
+	--pkg umockdev-1.0		\
+	--pkg glib-2.0			\
+	--pkg gio-2.0			\
+	--pkg gudev-1.0			\
+	$(AM_VALAFLAGS)			\
+	$(NULL)
+
+endif # HAVE_GUDEV
+
 tests_test_ioctl_tree_SOURCES =	\
 	src/ioctl_tree.c	\
 	tests/test-ioctl-tree.c	\
@@ -281,30 +307,11 @@ tests_test_ioctl_tree_LDADD =	\
 	$(GLIB_LIBS)		\
 	$(NULL)
 
-CHECKS += tests/test-umockdev tests/test-ioctl-tree
+CHECKS += tests/test-ioctl-tree
 
 EXTRA_DIST += tests/test-umockdev.py tests/xorg-dummy.conf tests/test-static-code
 
-noinst_PROGRAMS += tests/test-umockdev-vala tests/test-umockdev-run tests/test-umockdev-record
-
-tests_test_umockdev_vala_SOURCES = 	\
-	tests/test-umockdev-vala.vala	\
-	tests/assertions.vapi		\
-	tests/ioctl.vapi		\
-	src/posix_extra.vapi		\
-	$(NULL)
-
-tests_test_umockdev_vala_CFLAGS = $(GLIB_CFLAGS) $(GUDEV_CFLAGS) -I $(srcdir)/src -I src -w
-tests_test_umockdev_vala_LDADD = $(GLIB_LIBS) $(GUDEV_LIBS) libumockdev.la
-tests_test_umockdev_vala_VALAFLAGS =		\
-	--vapidir tests			\
-	--vapidir $(top_builddir)/src	\
-	--pkg umockdev-1.0		\
-	--pkg glib-2.0			\
-	--pkg gio-2.0			\
-	--pkg gudev-1.0			\
-	$(AM_VALAFLAGS)			\
-	$(NULL)
+noinst_PROGRAMS += tests/test-umockdev-run tests/test-umockdev-record
 
 tests_test_umockdev_run_SOURCES = 	\
 	tests/test-umockdev-run.vala	\
@@ -351,7 +358,7 @@ DISTCLEANFILES += \
 	$(srcdir)/tests_test_umockdev_record_vala.stamp	\
 	$(NULL)
 
-CHECKS += tests/test-umockdev-vala tests/test-umockdev-run tests/test-umockdev-record
+CHECKS += tests/test-umockdev-run tests/test-umockdev-record
 
 # we do not use TESTS to avoid using the parallel test runner which does not
 # give any useful output on failures
@@ -367,10 +374,12 @@ check-local: $(CHECKS)
 
 if HAVE_INTROSPECTION
 if HAVE_PYTHON
+if HAVE_GUDEV
 	@if [ -z "$(T)" ]; then \
 		echo "== Running GI test with $(PYTHON) against build tree =="; \
 		$(PYTEST_TREE) $(srcdir)/tests/test-umockdev.py; \
 	fi
+endif
 endif
 	echo "== Running static code tests against build tree =="
 	$(srcdir)/tests/test-static-code
@@ -386,10 +395,12 @@ check-installed: $(CHECKS)
 
 if HAVE_INTROSPECTION
 if HAVE_PYTHON
+if HAVE_GUDEV
 	@echo "== Running GI test with $(PYTHON) against installed system =="
 	$(PYTEST_INSTALL) $(srcdir)/tests/test-umockdev.py
 endif
 endif
+endif
 
 check-valgrind:
 	EXEC_NAME="valgrind --leak-check=full --show-possibly-lost=no -q" G_DEBUG=gc-friendly $(MAKE) check

configure.ac

@@ -71,7 +71,8 @@ m4_ifdef([GOBJECT_INTROSPECTION_CHECK],
 AC_SEARCH_LIBS([dlsym], [dl], [], [AC_MSG_ERROR([Dynamic linking loader library not found])])
 PKG_CHECK_MODULES([GLIB], [glib-2.0 >= 2.32.0 gobject-2.0 >= 2.32.0 gio-2.0 >= 2.32.0 gio-unix-2.0 >= 2.32.0])
 PKG_CHECK_MODULES([LIBUDEV], [libudev])
-PKG_CHECK_MODULES([GUDEV], [gudev-1.0])
+PKG_CHECK_MODULES([GUDEV], [gudev-1.0],[have_gudev=yes], [have_gudev=])
+AM_CONDITIONAL([HAVE_GUDEV], [test x$have_gudev != x])
 
 
 # if we have Python 2 or 3, run the GI test (they will skip if gi.repository is