common WITH_* flags

Makefile

@@ -1,5 +1,8 @@
+include lib.mk
 -include config.mk
 
+
+# =====
 DESTDIR ?=
 PREFIX ?= /usr/local
 MANPREFIX ?= $(PREFIX)/share/man
@@ -12,6 +15,14 @@ LDFLAGS ?=
 
 R_DESTDIR = $(if $(DESTDIR),$(shell realpath "$(DESTDIR)"),)
 
+WITH_PYTHON ?= 0
+WITH_JANUS ?= 0
+WITH_V4P ?= 0
+WITH_GPIO ?= 0
+WITH_SYSTEMD ?= 0
+WITH_PTHREAD_NP ?= 1
+WITH_SETPROCTITLE ?= 1
+
 export
 
 _LINTERS_IMAGE ?= ustreamer-linters
@@ -24,14 +35,11 @@ endif
 
 
 # =====
-define optbool
-$(filter $(shell echo $(1) | tr A-Z a-z), yes on 1)
-endef
-
 ifeq ($(V),)
 	ECHO = @
 endif
 
+
 # =====
 all:
 	+ $(MAKE) apps