Initial support for building Finit statically (incomplete)

This patch adresses issue #5.  However, there still remains a few issues
to work around before Finit can be built completely standalone.

    $ make clean all STATIC=1
    LINK    finit
    helpers.o: In function `getgroup':
    helpers.c:(.text+0x10a7): warning: Using 'getgrnam' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking
    helpers.o: In function `getuser':
    helpers.c:(.text+0x108e): warning: Using 'getpwnam' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking
    inetd.o: In function `getent':
    inetd.c:(.text+0x127): warning: Using 'getprotobyname' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking
    inetd.c:(.text+0xce): warning: Using 'getservbyname' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking

The problem is the NSS plugins and similar issues that prevent static
linking when using the above functions.  See issue #5 for more on this.

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

Makefile

@@ -56,6 +56,19 @@ FINIT_FIFO ?= /dev/initctl
 FINIT_CONF ?= $(sysconfdir)/finit.conf
 FINIT_RCSD ?= $(sysconfdir)/finit.d
 
+# Some people may want to build Finit with statically linked libraries
+# invocation: make STATIC=1
+ifeq ($(STATIC), 1)
+LDFLAGS    += -static
+CPPFLAGS   += -DPLUGINS_STATIC
+PLUGINS     = ""
+SRCS       += $(wjldcard plugins/*.c)
+OBJS       := $(SRCS:.c=.o)
+else
+LDFLAGS    += -rdynamic
+LDLIBS     += -ldl
+endif
+
 CFLAGS     += -W -Wall -Werror -Os
 # Disable annoying gcc warning for "warn_unused_result", see GIT 37af997
 CPPFLAGS   += -U_FORTIFY_SOURCE
@@ -64,12 +77,12 @@ CPPFLAGS   += -D_XOPEN_SOURCE=600 -D_BSD_SOURCE -D_GNU_SOURCE
 CPPFLAGS   += -DVERSION=\"$(VERSION)\" -DWHOAMI=\"`whoami`@`hostname`\"
 CPPFLAGS   += -DFINIT_FIFO=\"$(FINIT_FIFO)\" -DFINIT_CONF=\"$(FINIT_CONF)\"
 CPPFLAGS   += -DFINIT_RCSD=\"$(FINIT_RCSD)\" -DPLUGIN_PATH=\"$(plugindir)\"
-LDFLAGS    += -rdynamic -L$(TOPDIR)/libite
-DEPLIBS     = libite/libite.so libuev/libuev.a
-LDLIBS     += -ldl -lite
+LDFLAGS    += -L$(TOPDIR)/libite -L$(TOPDIR)/libuev
+DEPLIBS     = libite/libite.a libuev/libuev.a
+LDLIBS     += -lite -luev
 
 include common.mk
-export libdir plugindir incdir ROOTDIR CPPFLAGS LDFLAGS LDLIBS
+export libdir plugindir incdir ROOTDIR CPPFLAGS LDFLAGS LDLIBS STATIC
 
 all: $(DEPLIBS) $(EXEC)
 	+$(MAKE) -C plugins $@
@@ -78,9 +91,9 @@ $(DEPLIBS): Makefile
 	+$(MAKE) -C libite all
 	+$(MAKE) -C libuev all
 
-$(OBJS): Makefile
+$(OBJS): Makefile $(DEPLIBS)
 
-finit: $(OBJS) $(DEPLIBS)
+finit: $(OBJS)
 
 reboot: reboot.o $(DEPLIBS)