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)
 

common.mk

@@ -8,6 +8,7 @@ MAKEFLAGS   = --no-print-directory --silent
 CHECK      := cppcheck $(CPPFLAGS) --quiet --enable=all
 INSTALL    := install --backup=off
 STRIPINST  := $(INSTALL) -s --strip-program=$(CROSS)strip -m 0755
+ARFLAGS    := crus
 
 # Smart autodependecy generation via GCC -M.
 .%.d: %.c

libite/Makefile

@@ -25,7 +25,9 @@
 
 include  ../common.mk
 
+ifneq ($(STATIC), 1)
 CFLAGS     += -fPIC
+endif
 HEADERS     = lite.h
 OBJS       := copyfile.o dir.o fexist.o fisdir.o fmode.o rsync.o
 OBJS       += strlcpy.o strlcat.o strtonum.o
@@ -33,9 +35,14 @@ DEPS       := $(addprefix ., $(OBJS:.o=.d))
 
 VER         = 0
 LIBNAME     = libite
-TARGET      = $(LIBNAME).so
-VERLIB      = $(TARGET).$(VER)
+SOLIB       = $(LIBNAME).so.$(VER)
+SYMLIB      = $(LIBNAME).so
 STATICLIB   = $(LIBNAME).a
+ifeq ($(STATIC), 1)
+TARGET      = $(STATICLIB)
+else
+TARGET      = $(STATICLIB) $(SOLIB)
+endif
 
 CHECK_FLAGS = $(CFLAGS) $(CPPFLAGS)
 
@@ -43,17 +50,20 @@ all: $(TARGET)
 
 $(OBJS): Makefile
 
-$(TARGET): $(OBJS)
+$(SOLIB): $(OBJS)
 	@printf "  LINK    %s\n" $@
-#	@$(AR) $(ARFLAGS) $(STATICLIB) $(OBJS)
 	@$(CC) $(LDFLAGS) -shared $(OBJS) -lrt -lcrypt -Wl,-soname,$@ -o $@
-	@ln -sf $@ $(VERLIB)
+
+$(STATICLIB): Makefile $(OBJS)
+	@printf "  ARCHIVE $@\n"
+	@$(AR) $(ARFLAGS) $@ $(OBJS)
 
 install-exec: all
 	@install -d $(DESTDIR)$(libdir)
-	@echo "  INSTALL $(DESTDIR)$(libdir)/$(TARGET)"
-	@$(STRIPINST) $(TARGET) $(DESTDIR)$(libdir)/$(TARGET)
-	@ln -sf $(TARGET) $(DESTDIR)$(libdir)/$(VERLIB)
+	@printf "  INSTALL $(DESTDIR)$(libdir)/$(SOLIB)\n"
+	@$(STRIPINST)  $(SOLIB) $(DESTDIR)$(libdir)/$(SOLIB)
+	@$(STRIPINST)  $(STATICLIB) $(DESTDIR)$(libdir)/$(STATICLIB)
+	@ln -sf $(SOLIB) $(DESTDIR)$(libdir)/$(SYMLIB)
 
 install-dev:
 	@for file in $(HEADERS); do	                                \
@@ -61,11 +71,15 @@ install-dev:
 		$(INSTALL) -m 0644 $$file $(DESTDIR)$(incdir)/$$file;	\
 	done
 
-install: install-dev install-exec
+install: install-exec install-dev
 
 uninstall:
-	-@$(RM) $(DESTDIR)$(libdir)/$(VERLIB)
-	-@$(RM) $(DESTDIR)$(libdir)/$(TARGET)
+	-@$(RM) $(DESTDIR)$(libdir)/$(SOLIB)
+	-@$(RM) $(DESTDIR)$(libdir)/$(SYMLIB)
+	-@$(RM) $(DESTDIR)$(libdir)/$(STATICLIB)
+	-@for file in $(HEADERS); do			\
+		$(RM) $(DESTDIR)$(incdir)/$$file;	\
+	done
 
 clean: uninstall
 	-@$(RM) $(OBJS) $(DEPS) $(TARGET) $(VERLIB) $(STATICLIB)

plugin.c

@@ -39,7 +39,9 @@
 static char *plugpath = NULL; /* Set by first load. */
 static TAILQ_HEAD(plugin_head, plugin) plugins  = TAILQ_HEAD_INITIALIZER(plugins);
 
+#ifndef PLUGINS_STATIC
 static void check_plugin_depends(plugin_t *plugin);
+#endif
 
 int plugin_register(plugin_t *plugin)
 {
@@ -50,12 +52,16 @@ int plugin_register(plugin_t *plugin)
 
 	/* Setup default name if none is provided */
 	if (!plugin->name) {
+#ifndef PLUGINS_STATIC
 		Dl_info info;
 
 		if (!dladdr(plugin, &info) || !info.dli_fname)
 			plugin->name = "unknown";
 		else
 			plugin->name = (char *)info.dli_fname;
+#else
+			plugin->name = "unknown";
+#endif
 	}
 
 	/* Already registered? */
@@ -64,8 +70,10 @@ int plugin_register(plugin_t *plugin)
 		return 0;
 	}
 
+#ifndef PLUGINS_STATIC
 	/* Resolve plugin dependencies */
 	check_plugin_depends(plugin);
+#endif
 
 	TAILQ_INSERT_TAIL(&plugins, plugin, link);
 
@@ -75,6 +83,7 @@ int plugin_register(plugin_t *plugin)
 /* Not called, at the moment plugins cannot be unloaded. */
 int plugin_unregister(plugin_t *plugin)
 {
+#ifndef PLUGINS_STATIC
 	TAILQ_REMOVE(&plugins, plugin, link);
 
 	if (plugin->svc.cb) {
@@ -92,6 +101,9 @@ int plugin_unregister(plugin_t *plugin)
 		_e("Failed unloading %s ...", plugin->name);
 		return 1;
 	}
+#else
+	_d("Finit built statically, cannot unload %s ...", plugin->name);
+#endif
 
 	return 0;
 }
@@ -191,7 +203,7 @@ static void init_plugins(uev_ctx_t *ctx)
 	}
 }
 
-
+#ifndef PLUGINS_STATIC
 /**
  * load_one - Load one plugin
  * @path: Path to finit plugins, usually %PLUGIN_PATH
@@ -270,10 +282,12 @@ static void check_plugin_depends(plugin_t *plugin)
 		load_one(plugpath, plugin->depends[i]);
 	}
 }
+#endif	/* PLUGINS_STATIC */
 
 int plugin_load_all(uev_ctx_t *ctx, char *path)
 {
 	int fail = 0;
+#ifndef PLUGINS_STATIC
 	DIR *dp = opendir(path);
 	struct dirent *entry;
 
@@ -295,6 +309,11 @@ int plugin_load_all(uev_ctx_t *ctx, char *path)
 	}
 
 	closedir(dp);
+#else
+	_d("Finit built statically, not loading plugins from %s ...", path);
+#endif	/* PLUGINS_STATIC */
+
+	/* Always initialize plugins */
 	init_plugins(ctx);
 
 	return fail;

plugins/Makefile

@@ -1,11 +1,13 @@
-# Plugin based services architecture for finit -*-Makefile-*-
+# Plugin based services architecture for finit
 CFLAGS     += -fPIC -Os
 CPPFLAGS   += -I..
 LDFLAGS    := $(filter-out -rdynamic, $(LDFLAGS))
 LDFLAGS    += -shared
+ifneq ($(STATIC), 1)
 PLUGINS    ?= initctl.so alsa-utils.so bootmisc.so dbus.so hwclock.so \
 	      resolvconf.so urandom.so x11-common.so tty.so time.so
 DEPS        = $(addprefix .,$(PLUGINS:.so=.d))
+endif
 TOPDIR     ?= $(shell pwd)
 
 include ../common.mk