Add --with-libuev=PATH to configure script to use external libuEv

This commit makes it possible to build Finit with an external libuEv.
Without this configure script option the libuev submodule is used.

With an external libuEv we make sure to set the SONAME to libuev.so.1
to prevent any future runtime ABI issues.

Fixes issue #4.

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>

Makefile

@@ -38,7 +38,7 @@ HEADERS     = finit.h plugin.h svc.h inetd.h helpers.h queue.h
 DISTFILES   = LICENSE README ChangeLog finit.conf services
 OBJS        = finit.o api.o client.o conf.o exec.o helpers.o pid.o sig.o \
 	      svc.o service.o plugin.o tty.o inetd.o event.o
-
+DEPLIBS     =
 TOPDIR      = $(shell pwd)
 -include config.mk
 
@@ -52,9 +52,6 @@ CPPFLAGS   += -U_FORTIFY_SOURCE
 CPPFLAGS   += -I$(TOPDIR)
 CPPFLAGS   += -D_XOPEN_SOURCE=600 -D_BSD_SOURCE -D_GNU_SOURCE -D_DEFAULT_SOURCE
 CPPFLAGS   += -DVERSION=\"$(VERSION)\" -DWHOAMI=\"`whoami`@`hostname`\"
-LDFLAGS    += -L$(TOPDIR)/libuev
-DEPLIBS    += libuev/libuev.a
-LDLIBS     += -luev
 
 include common.mk
 
@@ -89,7 +86,9 @@ install-exec: all
 ifndef LIBITE
 	$(MAKE) -C libite  install-exec
 endif
+ifndef LIBUEV
 	$(MAKE) -C plugins install
+endif
 
 install-data:
 	@$(INSTALL) -d $(DESTDIR)$(datadir)
@@ -108,7 +107,9 @@ install-dev:
 ifndef LIBITE
 	$(MAKE) -C libite install-dev
 endif
+ifndef LIBUEV
 	$(MAKE) -C libuev install-dev
+endif
 
 install: install-exec install-data install-dev
 
@@ -123,7 +124,9 @@ uninstall-exec:
 ifndef LIBITE
 	$(MAKE) -C libite  uninstall
 endif
+ifndef LIBUEV
 	$(MAKE) -C plugins uninstall
+endif
 
 uninstall-data:
 	@for file in $(DISTFILES); do	                                \
@@ -143,7 +146,9 @@ clean:
 ifndef LIBITE
 	+$(MAKE) -C libite  $@
 endif
+ifndef LIBUEV
 	+$(MAKE) -C libuev  $@
+endif
 	-@$(RM) $(OBJS) $(DEPS) $(EXEC)
 
 distclean: clean
@@ -151,7 +156,9 @@ distclean: clean
 ifndef LIBITE
 	+$(MAKE) -C libite  $@
 endif
+ifndef LIBUEV
 	+$(MAKE) -C libuev  $@
+endif
 	-@$(RM) $(JUNK) config.mk config.h unittest *.o *.html
 
 check:

configure

@@ -97,6 +97,12 @@ result()
                 echo "Libite (LITE)     : $libite + {/lib, /include}"
 	fi
 
+	if [ x"$libuev" = x"" ]; then
+                echo "LibuEv            : Built-in"
+	else
+                echo "LibuEv            : $libuev + {/lib, /include}"
+	fi
+
         if [ $verbose -ne 1 ]; then
                 echo "Quiet Finit       : YES"
         else
@@ -157,8 +163,10 @@ usage()
         echo "  --with-username=USER   User for 'startx' .conf option, default: root"
         echo "  --with-hostname=NAME   Hostname, if /etc/hostname is missing, default: noname"
         echo "  --with-runlevel=LEVEL  Runlevel to switch to after bootstrap (S), default: 2"
-	echo "  --with-libite=PATH     Look for libite in PATH/include and PATH/lib"
+        echo "  --with-libite=PATH     Look for libite in PATH/include and PATH/lib"
-	echo "                         This is for disabling the use of built-in libite."
+        echo "                         This is for disabling the use of built-in libite."
+        echo "  --with-libuev=PATH     Look for libuEv in PATH/include and PATH/lib"
+        echo "                         This is for disabling the use of built-in libuEv."
         echo
         echo "  --enable-embedded      Embedded defaults, BusBox getty, mdev etc."
         echo "  --enable-dbus          Enable D-Bus plugin.  Note: install plugin as well!"
@@ -263,6 +271,10 @@ while [ "$*" != "" ]; do
                         libite="$arg"
                         ;;
 
+                with-libuev)
+                        libuev="$arg"
+                        ;;
+
                 enable-debug)
                         debug=1
                         ;;
@@ -369,7 +381,18 @@ if [ x"$libite" != x"" ]; then
 else
         echo "LDFLAGS    += -L\$(TOPDIR)/libite"                  >> config.mk
         echo "LDLIBS     += -lite"                                >> config.mk
-        echo "DEPLIBS     = libite/libite.a"                      >> config.mk
+        echo "DEPLIBS    += libite/libite.a"                      >> config.mk
+fi
+
+if [ x"$libuev" != x"" ]; then
+        echo "LIBUEV      = $libuev"                              >> config.mk
+        echo "CFLAGS     += -I\$(LIBUEV)/include"                 >> config.mk
+        echo "LDFLAGS    += -L\$(LIBUEV)/lib"                     >> config.mk
+        echo "LDLIBS     += -l:libuev.so.1"                       >> config.mk
+else
+        echo "LDFLAGS    += -L\$(TOPDIR)/libuev"                  >> config.mk
+        echo "LDLIBS     += -luev"                                >> config.mk
+        echo "DEPLIBS    += libuev/libuev.a"                      >> config.mk
 fi
 
 echo                                                              >> config.mk