gmake issues on Linux

[Rick Merola]

I'm having issues, but I am not sure they are bugs.

 

Here's the situation.  I am porting my company's product to Linux from HP-UX.  We set up generic include files define the patterns for building.

 

For example, our include file for building libs has the following entries:

 

ifdef LIB1-LINUX-NAME
   CCFLAGS = $(LIB1-LINUX-CCFLAGS) $(GLOBALCCLIBFLAGS)
   LDFLAGS = $(LIB1-LINUX-LDFLAGS) $(GLOBALLDLIBFLAGS)
endif

 

$(LIB1-LINUX-OBJDIR)/%.o: %.cc
        $(CCC) $(CCLIBFLAGS) -c -o $@ $<

 

$(LIB1-LINUX-NAME): $(LIB1-LINUX-OBJ)
        $(CCC) $(LDFLAGS) -o $(LIB1-LINUX-NAME) $(LIB1-LINUX-OBJ)
        @cp -f $(LIB1-LINUX-NAME) $(PROJLIB-LINUX-PATH)/$(LIB1-LINUX-BASE)
        @echo "$(LIB1-LINUX-NAME) -> $(PROJLIB-LINUX-PATH)/$(LIB1-LINUX-BASE)"

And for exes:

ifdef EXE1-LINUX-NAME
   CCFLAGS = $(EXE1-LINUX-CCFLAGS)
   LDFLAGS = $(EXE1-LINUX-LDFLAGS)
endif

 

$(EXE1-LINUX-OBJDIR)/%.o: %.cc
        $(CCC) $(CCFLAGS) -c -o $@ $<

$(EXE1-LINUX-NAME): $(EXE1-LINUX-OBJ)
        $(CCC) -o $(EXE1-LINUX-NAME) $(EXE1-LINUX-OBJ) $(LDFLAGS)

 

Our Makefile defines the following:

GENCCFLAGS  = $(PROJCCFLAGS) $(PROJINCFLAGS) $(RWCCFLAGS)
GENCCFLAGS += $(STLCCFLAGS) $(VTHREADCCFLAGS)

 

LIB1                  = vsutil
LIB1OBJFILES          = BaseException.o itoa.o \
                        GenericQueueException.o \
                        CallTime.o CallID.o CallIDGenerator.o CRUD.o \
                        Timer.o TimerManager.o \
                        TimerThread.o TimeInterval.o CallClearInfo.o RWLock.o \
                        StringStreamBuffer.o

 

#
LIB1-LINUX-OBJDIR     = obj-linux
LIB1-LINUX-BASE       = lib$(LIB1)$(SHAREDLIBEXT)
LIB1-LINUX-NAME       = $(LIB1-LINUX-OBJDIR)/$(LIB1-LINUX-BASE)
LIB1-LINUX-CCFLAGS    = $(GENCCFLAGS) $(ORBCCFLAGS) -D_POSIX_PTHREAD_SEMANTICS
#LIB1-LINUX-LDFLAGS    =
LIB1-LINUX-OBJ        = $(LIB1OBJFILES:%=$(LIB1-LINUX-OBJDIR)/%)

 

EXE1NAME              = timertest
EXE1OBJ               = timertest.o
EXE1CCFLAGS           = $(GENCCFLAGS)
EXE1LDFLAGS           = -lrt

 

EXE1-LINUX-OBJDIR     = obj-linux
EXE1-LINUX-NAME       = $(EXE1-LINUX-OBJDIR)/$(EXE1NAME)
EXE1-LINUX-CCFLAGS    = $(EXE1CCFLAGS)
EXE1-LINUX-LDFLAGS    = $(PROJUTIL-LINUX-LDFLAGS) $(VTHREAD-LINUX-LDFLAGS) $(RWLDFLAGS) $(EXE1FLAGS)
EXE1-LINUX-OBJ        = $(EXE1OBJ:%=$(EXE1-LINUX-OBJDIR)

 

What I have found is that when compiling, the only variable that is used is the "GENCCFLAGS", even though I  use the variable to create the "LIB1-LINUX-CCFLAGS" in the Makefile.  The value of "LIB1-LINUX-CCFLAGS" is set correctly, but it just isn't used.  Can you tell me why?

 

I also found that the variables are always set to the last value set to it, not the value it is currently being set to.  For example, the "LDFLAGS" used in the linking of LIB1 will be the "LDFLAGS" is not equal to "LIB1-LINUX-LDFLAGS", but to "EXE1-LINUX-LDFLAGS".  I can probably fix this by renaming "LDFLAGS" to a value specific to the build I am doing, but I just want to make sure that's the way it suppose to work before I start.

 

Thanks,

Rick Merola
Senior Software Engineer
VSYS, Inc.