USE_CLANG = 1 ifdef USE_CLANG CC = clang++ CFLAGS = -std=c++1y -stdlib=libc++ -g else CC = g++-4.9 CFLAGS = -std=c++1y -g endif all: calc calc2 calc : calc.cc ../peglib.h $(CC) -o calc $(CFLAGS) -I.. calc.cc calc2 : calc2.cc ../peglib.h $(CC) -o calc2 $(CFLAGS) -I.. calc2.cc