GNU make: Makefile Build Multiple .cpp Files at Once

Question

This is more of a specific question on a specific case.

Here is what I have:

SRC = \
  CartoCursor.cpp \
  CartoOperatorFactory.cpp \
  CurveHelper.cpp \
  $(NULL)

CXX = g++
CC_FLAGS = -fPIC -Wall
SYMB_OBJ_DIR = ./obj/symb_obj
SYMB_X_INCLUDE = -I../../../MYLIBS
SYMB_X_OBJS = $(SRC:%.cpp=$(SYMB_OBJ_DIR)/%.o)

all : libSymbolXLib.a

libSymbolXLib.a : $(SYMB_X_OBJS)
        rm -f $@


$(SYMB_OBJ_DIR)/%.o : %.cpp
        $(CXX) -c $(CC_FLAGS) $(SYMB_X_INCLUDE) -o $(INT_DIR)/$*.o $?

When I run this I am getting the following error:

make[1]: *** No rule to make target `obj/symb_obj/CartoCursor.o', needed by `libSymbolXLib.a'.  Stop.

What do I need to do to get the libSymbolXLib to recognize the generic build rule?

If this is not clear please let me know.

UPDATE

Using:

CXX = g++
CC_FLAGS = -fPIC -Wall
SYMB_OBJ_DIR = ./obj/symb_obj
SYMB_X_INCLUDE = -I../../../MYLIBS
SYMB_X_OBJS = $(SRC:%.cpp=$(SYMB_OBJ_DIR)/%.o)

all : libSymbolXLib.a

libSymbolXLib.a : $(SYMB_X_OBJS)
        ar rcs $@ $^

$(SYMB_OBJ_DIR)/%.o : %.cpp
        $(CXX) -c $(CC_FLAGS) $(SYMB_X_INCLUDE) -o $@ $

[mehoggan@hogganz400 Core]$ make
mkdir -p ./libs
mkdir -p ./obj/symb_obj
make -f ./Graphic/SymbolXLib/Makefile
make[1]: Entering directory `/home/mehoggan/arcgis-new/GraphicsCore_Dev/Runtime/Core'
make[1]: *** No rule to make target `obj/symb_obj/CartoCursor.o', needed by `libSymbolXLib.a'.  Stop.
make[1]: Leaving directory `/home/mehoggan/arcgis-new/GraphicsCore_Dev/Runtime/Core'
make: *** [build_symbol_x_lib] Error 2
[mehoggan@hogganz400 Core]$ make --version
GNU Make 3.81
Copyright (C) 2006  Free Software Foundation, Inc.
This is free software; see the source for copying conditions.
There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE.

This program built for x86_64-redhat-linux-gnu
[mehoggan@hogganz400 Core]$ uname -a
Linux hogganz400.esri.com 2.6.32-71.el6.x86_64 #1 SMP Wed Sep 1 01:33:01 EDT 2010 x86_64 x86_64 x86_64 GNU/Linux
[mehoggan@hogganz400 Core]$ cat /etc/redhat-release 
Red Hat Enterprise Linux Server release 6.0 (Santiago)
[mehoggan@hogganz400 Core]$

Have you tried removing the ./ prefix on SYMB_OBJ_DIR?

Joe
– Joe

2011-12-29 21:14:11 +00:00
Commented Dec 29, 2011 at 21:14 — Joe
– Joe, Commented Dec 29, 2011 at 21:14

sehe · Accepted Answer · 2011-12-29 21:23:24Z

2

It looks a lot like the INT_DIR and $? variables used is out of place. I'd expect this:

$(SYMB_OBJ_DIR)/%.o : %.cpp
    $(CXX) -c $(CC_FLAGS) $(SYMB_X_INCLUDE) -o $@ $<

You'll want to update the ar rules for libSymbolXLib.a to be something else than just rm too :)

The following example worked just fine on my system:

SRC = \
      CartoCursor.cpp \
      CartoOperatorFactory.cpp \
      CurveHelper.cpp \
      $(NULL)

CXX = g++
CC_FLAGS = -fPIC -Wall
SYMB_OBJ_DIR = ./obj/symb_obj
SYMB_X_INCLUDE = -I../../../MYLIBS
SYMB_X_OBJS = $(SRC:%.cpp=$(SYMB_OBJ_DIR)/%.o)

all : libSymbolXLib.a

libSymbolXLib.a : $(SYMB_X_OBJS)
    ar rcs $@ $^

$(SYMB_OBJ_DIR)/%.o : %.cpp
    $(CXX) -c $(CC_FLAGS) $(SYMB_X_INCLUDE) -o $@ $<

Demo:

$ touch CartoCursor.cpp CartoOperatorFactory.cpp CurveHelper.cpp
$ mkdir -pv obj/symb_obj
$ make

g++ -c -fPIC -Wall -I../../../MYLIBS -o obj/symb_obj/CartoCursor.o CartoCursor.cpp
g++ -c -fPIC -Wall -I../../../MYLIBS -o obj/symb_obj/CartoOperatorFactory.o CartoOperatorFactory.cpp
g++ -c -fPIC -Wall -I../../../MYLIBS -o obj/symb_obj/CurveHelper.o CurveHelper.cpp
ar rcs libSymbolXLib.a obj/symb_obj/CartoCursor.o obj/symb_obj/CartoOperatorFactory.o obj/symb_obj/CurveHelper.o

$ file libSymbolXLib.a

libSymbolXLib.a: current ar archive

edited Dec 29, 2011 at 21:23

answered Dec 29, 2011 at 21:18

sehe

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1 Comment

sehe Over a year ago

added full demo, fixing a typo

Community · Accepted Answer · 2017-05-23 12:08:14Z

1

Make sure that CartoCursor.cpp exists in the directory where you run Make.

Also accordingly to Paul's Rules of Makefiles you should modify recipe of $(SYMB_OBJ_DIR)/%.o : %.cpp to update the file with exact name of the target, that is:

$(SYMB_OBJ_DIR)/%.o : %.cpp
    $(CXX) -c $(CC_FLAGS) $(SYMB_X_INCLUDE) -o $@ $^

UPD.

The same applies to recipe for libSymbolXLib.a, it must update the target file. You can insert a touch $@ stub for debugging, or as @sehe has mentioned add a proper recipe:

libSymbolXLib.a : $(SYMB_X_OBJS)
    ar rcs $@ $^

edited May 23, 2017 at 12:08

CommunityBot

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answered Dec 29, 2011 at 21:21

Eldar Abusalimov

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