From: Helmut Grohne <helmut@subdivi.de>
Date: Tue, 30 Jul 2019 15:09:13 +0200
Bug-Debian: https://bugs.debian.org/933405
Description: Enable cross building
 fastml fails to cross build from source, because it uses both CC and CXX
 for a C++ compiler, but dh_auto_build passes a C compiler for CC. The
 use is kinda implicit via builtin make rules. The attached patch makes
 the relevant rule explicit and thus removes the use of CC to make fastml
 cross buildable. Please consider applying it.

--- a/programs/Makefile.generic
+++ b/programs/Makefile.generic
@@ -17,9 +17,7 @@ DOUBLEREPLIB = $(LIB:.a=DoubleRep.a)
 
 all: lib $(EXEC)
 
-#CC=g++
 CXX=g++
-CC=$(CXX)
 
 libDir=../../libs/phylogeny
 binDir=../../bin
@@ -112,6 +110,7 @@ endif
 #$(EXEC) $(TEST_EXEC): $(LIB) #$(EVOLLIB)
 #$(EXEC) $(TEST_EXEC): $(LIB) $(EVOLLIB)
 $(EXEC) $(TEST_EXEC): $(LocalLib) $(libEvol)
+	$(CXX) $(LDFLAGS) $^ -o $@
 $(DEBUGEXEC) $(TEST_EXEC): $(DEBUGLIB) $(libEvolDebug)
 
 tests: $(TEST_EXEC) $(EXEC)