makefile scripts and samples

It is efficient to use scripts when the machine environment is diverse. Most of the settings are standardized. Modify the scripts if you use external libraries and headers. Options are also easily added or removed.

Common mk script

#!/bin/ksh
#-----------------------------------------------------------
# common mk script
#-----------------------------------------------------------
UNAME=`uname`

if [ "$UNAME" = "Linux" ]
then
    export CC=gcc
    export OS="-DOS_LINUX"
    export CFLAGS="${OS} -g -O2 -m64 -Wall -fPIC"
    export LFLAGS="-dynamic"
    export SHFLAGS="-shared"
elif [ "$UNAME" = "AIX" ]
then
    export CC=xlc
    export OS="-DOS_AIX"
    export CFLAGS="${OS} -g -O2 -q64"
    export LFLAGS="-brtl"
    export SHFLAGS="-G -bM:SRE"
elif [ "$UNAME" = "HP-UX" ]
then
    export CC=cc
    HPOS=`uname -a | awk '{if($5 == "ia64) {print $5}}'`

    if [ "$HPOS" = "ia64" ]
    then
        export OS="-DUSR_OS_HPUX"
    else
        export OS="-DUSR_OS_HPUX_PARISC"
    fi
    export CFLAGS="${OS} -g -O2 +DD64"
    export LFLAGS="-O2 +DD64"
    export SHFLAGS="-b -z"
elif [ "$UNAME" = "SunOS" ]
then
    export CC=cc
    export OS="-DUSR_OS_SUN"
    export CFLAGS="${OS} -g -O2 -m64 -KPIC"
    export LFLAGS="-g -O2 -m64 -dy -lsocket -nsl"
#   export LFLAGS="-g -O2 -dy -lsocket -nsl" # SunOS 32bits
    export SHFLAGS="-G"
else
    exit
fi

echo "-----------------------------------------"
echo "${UNAME} Start compiling..."
echo "-----------------------------------------"

make $1 $2 $3

makefile case #1 : c

#===========================================================
# makefile
#===========================================================
#-----------------------------------------------------------
# TARGETS : Multiple targets can be separated by space.
#-----------------------------------------------------------
TARGETS=pgm1 pgm2
USRHOME=$HOME

BIN=${USRHOME}/bin
INC=${USRHOME}/inc
LIB=${USRHOME}/lib

USRINCS=-I. -I${INC}
USRLIBS=-L. -L${LIB}
USRDEFS=

# if you need more cflags, you can add them.
CFLAGS=$(CFLAGS) $(USRINCS) $(USRDEFS)

# if you need more lflags, you can add them.
LFLAGS=$(LFLAGS) $(USRLIBS)

#-----------------------------------------------------------
# Compile
#-----------------------------------------------------------
.SUFFIXES : .c .o

.c.o:
    $(CC) $(CFLAGS) -c $<

all:$(TARGETS)

#-----------------------------------------------------------
# Linking
#-----------------------------------------------------------
pgm1:pgm1.o
    $(CC) $(LFLAGS) -o $@ $<

pgm2:pgm2.o
    $(CC) $(LFLAGS) -o $@ $<

#-----------------------------------------------------------
# install
#-----------------------------------------------------------
install:all
    cp -pf $(TARGETS) $(BIN)

#-----------------------------------------------------------
# clean
#-----------------------------------------------------------
clean:
    rm -f $(TARGETS) *.o

makefile case #2 : c and c++

If you met the following message for linking, you can add c++ library. For gcc try adding -lstdc++ to your LFLAG. However, for g++ it will link libstdc.so.6++ automatically.

• libstdc++: DSO missing from command line

#===========================================================
# makefile
#===========================================================
#-----------------------------------------------------------
# TARGETS : Multiple targets can be separated by space.
#-----------------------------------------------------------
TARGETS=pgm1 pgm2 pgm3 pgm4
USRHOME=$HOME

BIN=${USRHOME}/bin
INC=${USRHOME}/inc
LIB=${USRHOME}/lib

USRINCS=-I. -I${INC}
USRLIBS=-L. -L${LIB}
USRDEFS=

# if you need more cflags, you can add them.
CFLAGS=$(CFLAGS) $(USRINCS) $(USRDEFS) -DHAVE_COMFIG_H -D_GNU_SOURCE -Wno-write-strings -D_X_AGT_CPP

# if you need more lflags, you can add them.
LFLAGS=$(LFLAGS) -lstdc++ $(USRLIBS)

#-----------------------------------------------------------
# Compile
#-----------------------------------------------------------
.SUFFIXES : .c .o .cpp

.c.o:
    $(CC) $(CFLAGS) -c $<

.cpp.o:
    $(CC) $(CFLAGS) -c $<

all:$(TARGETS)


#-----------------------------------------------------------
# Linking
#-----------------------------------------------------------
# case #1 - you can add -D flag here
pgm1:pgm1.cpp pgm1.h
    $(CC) $(CFLAGS) $(LFLAGS) -o $@ pgm1.cpp

#case #2 - -D flag is not working here
pgm2:pgm2.o
    $(CC) $(LFLAGS) -o $@ $@.o

#case #3 - -D flag is not working here
pgm3:pgm3.o
    $(CC) $(LFLAGS) -o $@ $<

#-----------------------------------------------------------
# install
#-----------------------------------------------------------
install:all
    cp -pf $(TARGETS) $(BIN)

#-----------------------------------------------------------
# clean
#-----------------------------------------------------------
clean:
    rm -f $(TARGETS) *.o