Rewrite Makefile

src/apps/Makefile

@@ -1,22 +1,78 @@
-APPS	= leandvb leansdrscan
-APPS	+= leansdrcat leantsgen leanchansim leandvbtx
+default:	native
 
-all:	$(APPS)
+VERSION	:= leansdr-$(shell git describe)
 
-clean:
-	rm -f $(APPS)
+# Portable flags for development.
+
+CXXFLAGS	= -O3 -I.. -DVERSION=\"$(VERSION)\" \
+		  -Wall \
+		  -Wno-sign-compare -Wno-array-bounds -Wno-unused-variable
+
+LDFLAGS		=
+
+# Base applications have no external dependencies.
+APPS	=
+APPS	+= leandvbtx leandvb
+APPS	+= leansdrscan leansdrserv
+APPS	+= leantsgen leansdrcat leanchansim
+
+
+# leanmlmrx requires fftw3 and pthread.
+ifneq "$(wildcard /usr/include/fftw3.h)" ""
+ifneq "$(wildcard /usr/include/pthread.h)" ""
+APPS		+= leanmlmrx
+CXXFLAGS	+=
+LDFLAGS		+= -lfftw3f -lpthread
+else
+$(info libpthread not found. Will not build leanmlmrx.)
+endif
+else
+$(info libfftw3f not found. Will not build leanmlmrx.)
+endif
+
+# leaniio{rx,tx} require libiio.
+# Expected in ./libiio/, including libiio.a.
+# (Assume libiio dependencies are satisfied.)
+ifneq "$(wildcard libiio/iio.h)" ""
+APPS		+= leaniiorx leaniiotx
+CXXFLAGS	+= -Ilibiio
+LDFLAGS		+= -Llibiio -L. -liio -lpthread -lxml2 -lz -llzma
+else
+$(info libiio not found. Will not build leaniio{rx,tx}.)
+endif
+
+# Enable X11 GUI if easily found.
+ifneq "$(wildcard /usr/include/X11/Xlib.h)" ""
+CXXFLAGS_GUI	= -DGUI
+LDFLAGS_GUI	= -lX11
+else
+$(info X11 not found. Will not compile GUI.)
+endif
 
 DEPS	= ../leansdr/*.h
 
-CXXFLAGS	= -O3 -I.. -Wall -Wno-sign-compare -Wno-array-bounds -Wno-unused-variable
-
 %:	%.cc $(DEPS)
-	g++ $(CXXFLAGS) -DGUI $< -lX11 -o $@  ||  \
-	g++ $(CXXFLAGS)       $<       -o $@
+	g++ $(CXXFLAGS) $(CXXFLAGS_GUI) $< $(LDFLAGS) $(LDFLAGS_GUI) -o $@
 
-EMBED_FLAGS=	-I.. -Wall -Wno-sign-compare -Wno-array-bounds -Wno-unused-variable  \
-		-Ofast -mfpu=neon -funsafe-math-optimizations -fsingle-precision-constant
+native::	$(APPS)
+	@echo "Now 'make embedded' to also build static binaries."
 
-leandvb.embedded:	leandvb.cc $(DEPS)
-	g++ $(CXXFLAGS) $(EMBED_FLAGS) $< -static -o $@  ||  \
-	g++ $(CXXFLAGS) $(EMBED_FLAGS) $<         -o $@
+clean::
+	rm -f $(APPS)
+
+##### CPU-specific flags for embedded platforms.
+
+ARCH	:= $(shell uname -m)
+
+ifneq "$(findstring arm,$(ARCH))" ""
+CXXFLAGS_EMBEDDED	= $(CXXFLAGS) -Ofast -mfpu=neon -funsafe-math-optimizations -fsingle-precision-constant
+LDFLAGS_EMBEDDED	= $(LDFLAGS) -static
+else
+CXXFLAGS_EMBEDDED	= $(CXXFLAGS)
+LDFLAGS_EMBEDDED	= $(LDFLAGS) -static
+endif
+
+embedded:	$(APPS:%=%.$(ARCH))
+
+%.$(ARCH):	%.cc $(DEPS)
+	g++ $(CXXFLAGS_EMBEDDED) $< $(LDFLAGS_EMBEDDED) -o $@