Fix --enable-static build, only C library shared

This patch fixes regressions in --enable-static introduced with the
conversion to the GNU configure and build system.

The default link flag to libtool is set to -static-libtool-libs, meaning
not a fully static build -- the C library will still be used as an .so
which is usually what people want -- whereas libite (-lite) and libuEv
are linked statically.

$ ldd /sbin/finit /sbin/initctl
/sbin/finit:
	linux-vdso.so.1 =>  (0x00007ffffde62000)
	libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f6979ad8000)
	/lib64/ld-linux-x86-64.so.2 (0x000055d893e96000)
/sbin/initctl:
	linux-vdso.so.1 =>  (0x00007ffed0dd6000)
	libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007feb3a29c000)
	/lib64/ld-linux-x86-64.so.2 (0x00005556ebd2b000)

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

Makefile.am

@@ -4,27 +4,38 @@ finit_SOURCES      = finit.c api.c client.c conf.c exec.c helpers.c pid.c \
 		     sig.c svc.c service.c plugin.c tty.c cond.c cond-w.c sm.c
 pkginclude_HEADERS = cond.h finit.h helpers.h inetd.h plugin.h queue.h svc.h
 if INETD
-finit_SOURCES      += inetd.c
+finit_SOURCES     += inetd.c
 endif
+
 finit_CFLAGS       = -W -Wall -Wextra -std=gnu99 $(lite_CFLAGS) $(uev_CFLAGS)
-finit_LDADD        = -ldl $(lite_LIBS) $(uev_LIBS)
+finit_LDADD        = $(lite_LIBS) $(uev_LIBS)
 if STATIC
 finit_LDADD       += plugins/libplug.la
+else
+finit_LDADD       += -ldl
 endif
+
 initctl_SOURCES    = initctl.c svc.c helpers.c cond.c
 initctl_CFLAGS     = $(lite_CFLAGS)
 initctl_LDADD      = $(lite_LIBS)
+
 reboot_SOURCES     = reboot.c
+
 SYMLINK            = telinit init
 SUBDIRS            = plugins
 doc_DATA           = README.md LICENSE finit.conf services
 EXTRA_DIST         = README.md LICENSE ChangeLog.md finit.conf services
 AM_CPPFLAGS        = -U_FORTIFY_SOURCE
 AM_CPPFLAGS       += -D_XOPEN_SOURCE=600 -D_BSD_SOURCE -D_GNU_SOURCE -D_DEFAULT_SOURCE
-AM_CPPFLAGS       += -DFINIT_CONF=\"$(conf)\" -DFINIT_RCSD=\"$(rcsd)\" -DFINIT_FIFO=\"$(fifo)\" \
-		     -DPLUGIN_PATH=\"$(pkglibdir)\"
-AM_LDFLAGS         = -export-dynamic
+AM_CPPFLAGS       += -DFINIT_CONF=\"$(conf)\" -DFINIT_RCSD=\"$(rcsd)\" -DFINIT_FIFO=\"$(fifo)\"
 
+if STATIC
+AM_CPPFLAGS       += -DENABLE_STATIC
+AM_LDFLAGS         = -static-libtool-libs
+else
+AM_CPPFLAGS       += -DPLUGIN_PATH=\"$(pkglibdir)\"
+AM_LDFLAGS         = -export-dynamic
+endif
 
 # Compat hook
 install-dev: install-pkgincludeHEADERS