created a VERBOSE mode for the Makefile

diff --git a/src/Makefile b/src/Makefile
index 10f3f93..a2702eb 100644 (file)
--- a/src/Makefile
+++ b/src/Makefile
@@ -43,32 +43,51 @@ OBJS := ${SRCS:.cpp=.o}
 TARGET := ../run_physics
 DEPENDS := ${SRCS:.cpp=.d}
 
+VERBOSE := 0
+
+ifeq (${VERBOSE},0)
+    # quiet the echo command
+    Q1 := @
+    # quiet the command that is `replaced' by an echo
+    Q2 := @
+else
+    # EAT the echo command as if it was not there
+    Q1 := @true # NOTE: the space between @true and the # is VERY important!!
+    # do not quiet the command output
+    Q2 :=
+endif
 
 .PHONY: all
 all: ${TARGET}
 
 ${TARGET}: ${OBJS}
-       @echo "${CXX}: $@"
-       @${CXX} ${CXXFLAGS} -o ${TARGET} $^ ${LIBS}
+       ${Q1}echo "${CXX}: $@"
+       ${Q2}${CXX} ${CXXFLAGS} -o ${TARGET} $^ ${LIBS}
 
 # how to make a depend file from a source file
 %.d: %.cpp
-       @echo "DEP: $@"
-       @${CXX} -M ${CXXFLAGS} $< | sed 's,: , $@: ,' > $@
+       ${Q1}echo "DEP: $@"
+       ${Q2}${CXX} -M ${CXXFLAGS} $< | sed 's,: , $@: ,' > $@
 #@${CXX} -M ${CXXFLAGS} $< | sed 's,\($*\)\.o[ :]*,\1.o $@ : ,g' > $@
 
 %.o: %.cpp
-       @echo "${CXX}: $@"
-       @${CXX} ${CXXFLAGS} -c -o $@ $<
+       ${Q1}echo "${CXX}: $@"
+       ${Q2}${CXX} ${CXXFLAGS} -c -o $@ $<
 
 
 .PHONY: clean
 clean:
-       rm -f ${OBJS} ${TARGET}
+       ${Q1}echo "CLEAN: OBJS"
+       ${Q2}rm -f ${OBJS}
+       ${Q1}echo "CLEAN: TARGET"
+       ${Q2}rm -f ${TARGET}
 
 .PHONY: distclean
 distclean: clean
-       rm -f ${DEPENDS} tags prof gmon.out
+       ${Q1}echo "CLEAN: DEPENDS"
+       ${Q2}rm -f ${DEPENDS}
+       ${Q1}echo "CLEAN: tags prof gmon.out"
+       ${Q2}rm -f tags prof gmon.out
 
 tags: ${SRCS}
        ctags $^