build: Fix out-of-tree builds

In out-of-tree builds the current directory is the build directory which
is different to the source directory.

As a consequence this also fixes «make distcheck» to work.

Author: guillemj

cmd/Makefile.am

@@ -1,7 +1,7 @@
 bin_PROGRAMS = systool
 systool_SOURCES = systool.c names.c names.h
-LDADD = ../lib/libsysfs.la
+LDADD = $(top_builddir)/lib/libsysfs.la
 EXTRA_CFLAGS = @EXTRA_CFLAGS@
-AM_CPPFLAGS = -I../include
+AM_CPPFLAGS = -I$(top_srcdir)/include
 AM_CFLAGS = -Wall -W -Wextra -Wstrict-prototypes $(EXTRA_CFLAGS)
 

lib/Makefile.am

@@ -6,7 +6,7 @@ pkgconfig_DATA = libsysfs.pc
 lib_LTLIBRARIES = libsysfs.la
 libsysfs_la_SOURCES = sysfs_utils.c sysfs_attr.c sysfs_class.c dlist.c \
       sysfs_device.c sysfs_driver.c sysfs_bus.c sysfs_module.c sysfs.h
-libsysfs_la_CPPFLAGS = -I../include
+libsysfs_la_CPPFLAGS = -I$(top_srcdir)/include
 libsysfs_la_LDFLAGS = -version-info 2:1:0
 EXTRA_CFLAGS = @EXTRA_CLFAGS@
 libsysfs_la_CFLAGS = -Wall -W -Wextra -Wstrict-prototypes $(EXTRA_CLFAGS)

test/Makefile.am

@@ -2,15 +2,15 @@ check_PROGRAMS = dlist_test get_device get_driver get_module testlibsysfs
 BUILT_SOURCES = test.h
 CLEANFILES = test.h
 test.h: libsysfs.conf create-test
-	$(AM_V_GEN) ./create-test
+	$(AM_V_GEN) $(srcdir)/create-test $(srcdir)/libsysfs.conf
 get_device_SOURCES = get_device.c
 get_driver_SOURCES = get_driver.c
 get_module_SOURCES = get_module.c
 testlibsysfs_SOURCES = test.c test_attr.c test_bus.c test_class.c \
 		       test_device.c test_driver.c test_module.c test_utils.c \
 		       testout.c test-defs.h libsysfs.conf create-test
-AM_CPPFLAGS = -I../include
-LDADD = ../lib/libsysfs.la
+AM_CPPFLAGS = -I$(top_srcdir)/include
+LDADD = $(top_builddir)/lib/libsysfs.la
 EXTRA_CFLAGS = @EXTRA_CLFAGS@
 AM_CFLAGS = -Wall -W -Wextra -Wstrict-prototypes $(EXTRA_CLFAGS)
 

test/create-test

@@ -2,7 +2,7 @@
 
 rm -f test.h
 
-conf_file=./libsysfs.conf
+conf_file=${1:-libsysfs.conf}
 
 . $conf_file