flimflam: Enable -Wimplicit-function-declaration.

Makefile.am

 
 AM_MAKEFLAGS = --no-print-directory
 
 includedir = @includedir@/connman
 
 include_HEADERS = include/types.h include/log.h include/plugin.h \
                         include/security.h include/notifier.h \
                         include/storage.h include/service.h \
                         include/device.h include/network.h include/inet.h \
                         include/crypto.h include/blob.h
@@ skipping 72 matching lines @@
 testdir  = $(libdir)/flimflam/test
 
 if MAINTAINER_MODE
 build_plugindir = $(abs_top_srcdir)/plugins/.libs
 build_scriptdir = $(abs_top_srcdir)/scripts
 else
 build_plugindir = $(plugindir)
 build_scriptdir = $(scriptdir)
 endif
 
-AM_CFLAGS = -Werror @UDEV_CFLAGS@ @NETLINK_CFLAGS@ @DBUS_CFLAGS@ \
+AM_CFLAGS = -Wimplicit-function-declaration -Werror \
+                @UDEV_CFLAGS@ @NETLINK_CFLAGS@ @DBUS_CFLAGS@ \
                 @GLIB_CFLAGS@ @GTHREAD_CFLAGS@ $(builtin_cflags) \
                                 -DCONNMAN_PLUGIN_BUILTIN \
                                 -DSTATEDIR=\""$(statedir)"\" \
                                 -DPLUGINDIR=\""$(build_plugindir)"\" \
                                 -DSCRIPTDIR=\""$(build_scriptdir)"\" \
                                 -DSTORAGEDIR=\""$(storagedir)\""
 
 INCLUDES = -I$(builddir)/include -I$(builddir)/src -I$(srcdir)/gdbus
 
 EXTRA_DIST = src/genbuiltin src/flimflam-dbus.conf src/flimflam-polkit.conf
@@ skipping 130 matching lines @@
 include/connman/version.h: include/version.h
         $(AM_V_at)$(MKDIR_P) include/connman
         $(AM_V_GEN)$(LN_S) $(abs_top_builddir)/$< $@
 
 include/connman/%.h: include/%.h
         $(AM_V_at)$(MKDIR_P) include/connman
         $(AM_V_GEN)$(LN_S) $(abs_top_srcdir)/$< $@
 
 clean-local: include/connman
         @$(RM) -r $<