How to build C++ program with libjpeg library - c++

Question

I'd like to build C++ program with libjpeg library, but when I try to build it, I get errors below.
g++ main.cpp -o main.o
main.cpp:26:22: warning: conversion from string literal to 'char *' is deprecated [- Wdeprecated-writable-strings]
char *filename = "output.jpg";
^
1 warning generated.
Undefined symbols for architecture x86_64:
"_jpeg_CreateCompress", referenced from:
_main in main-sUpMU6.o
"_jpeg_destroy_compress", referenced from:
_main in main-sUpMU6.o
"_jpeg_finish_compress", referenced from:
_main in main-sUpMU6.o
"_jpeg_set_defaults", referenced from:
_main in main-sUpMU6.o
"_jpeg_set_quality", referenced from:
_main in main-sUpMU6.o
"_jpeg_start_compress", referenced from:
_main in main-sUpMU6.o
"_jpeg_std_error", referenced from:
_main in main-sUpMU6.o
"_jpeg_stdio_dest", referenced from:
_main in main-sUpMU6.o
"_jpeg_write_scanlines", referenced from:
_main in main-sUpMU6.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make: *** [main.o] Error 1
The structure of my project is like this.
./myCodes
main.h main.cpp Makefile
./jpeg-9
libjpeg src and build outputs
Make file is like this.
ulibjpeg: main.o
g++ -v -L../jpeg-9/cjpeg -L../jpeg-9/djpeg -L../jpeg-9 -l../jpeg-9 -ljpeg main.o -o ulibjpeg
main.o: main.cpp
g++ main.cpp -o main.o
I think I have to add libraries of libjpeg, but which files do I have to add and how can I add add that libraries in g++ options?
Here's the files of ./jpeg-9 directories.
Makefile jccoefct.c jcprepct.lo jdmarker.o jmemmgr.lo makefile.bcc rdjpgcom.1
Makefile.am jccoefct.lo jcprepct.o jdmaster.c jmemmgr.o makefile.dj rdjpgcom.c
Makefile.in jccoefct.o jcsample.c jdmaster.lo jmemname.c makefile.manx rdjpgcom.o
README jccolor.c jcsample.lo jdmaster.o jmemnobs.c makefile.mc6 rdppm.c
aclocal.m4 jccolor.lo jcsample.o jdmerge.c jmemnobs.lo makefile.mms rdppm.o
ar-lib jccolor.o jctrans.c jdmerge.lo jmemnobs.o makefile.sas rdrle.c
cderror.h jcdctmgr.c jctrans.lo jdmerge.o jmemsys.h makefile.unix rdrle.o
cdjpeg.c jcdctmgr.lo jctrans.o jdpostct.c jmorecfg.h makefile.vc rdswitch.c
cdjpeg.h jcdctmgr.o jdapimin.c jdpostct.lo jpegint.h makefile.vms rdswitch.o
cdjpeg.o jchuff.c jdapimin.lo jdpostct.o jpeglib.h makefile.wat rdtarga.c
change.log jchuff.lo jdapimin.o jdsample.c jpegtran makejdep.vc6 rdtarga.o
cjpeg jchuff.o jdapistd.c jdsample.lo jpegtran.1 makejdsp.vc6 stamp-h1
cjpeg.1 jcinit.c jdapistd.lo jdsample.o jpegtran.c makejdsw.vc6 structure.txt
cjpeg.c jcinit.lo jdapistd.o jdtrans.c jpegtran.o makejfil.v10 testimg.bmp
cjpeg.o jcinit.o jdarith.c jdtrans.lo jquant1.c makejmak.vc6 testimg.jpg
ckconfig.c jcmainct.c jdarith.lo jdtrans.o jquant1.lo makejsln.v10 testimg.ppm
coderules.txt jcmainct.lo jdarith.o jerror.c jquant1.o makejvcx.v10 testimgp.jpg
config.guess jcmainct.o jdatadst.c jerror.h jquant2.c makeproj.mac testorig.jpg
config.log jcmarker.c jdatadst.lo jerror.lo jquant2.lo makerdep.vc6 testprog.jpg
config.status jcmarker.lo jdatadst.o jerror.o jquant2.o makerdsp.vc6 transupp.c
config.sub jcmarker.o jdatasrc.c jfdctflt.c jutils.c makerfil.v10 transupp.h
configure jcmaster.c jdatasrc.lo jfdctflt.lo jutils.lo makermak.vc6 transupp.o
configure.ac jcmaster.lo jdatasrc.o jfdctflt.o jutils.o makervcx.v10 usage.txt
depcomp jcmaster.o jdcoefct.c jfdctfst.c jversion.h maketdep.vc6 wizard.txt
djpeg jcomapi.c jdcoefct.lo jfdctfst.lo libjpeg.la maketdsp.vc6 wrbmp.c
djpeg.1 jcomapi.lo jdcoefct.o jfdctfst.o libjpeg.map maketfil.v10 wrbmp.o
djpeg.c jcomapi.o jdcolor.c jfdctint.c libjpeg.txt maketmak.vc6 wrgif.c
djpeg.o jconfig.bcc jdcolor.lo jfdctint.lo libtool maketvcx.v10 wrgif.o
example.c jconfig.cfg jdcolor.o jfdctint.o ltmain.sh makewdep.vc6 wrjpgcom
filelist.txt jconfig.dj jdct.h jidctflt.c makcjpeg.st makewdsp.vc6 wrjpgcom.1
install-sh jconfig.h jddctmgr.c jidctflt.lo makdjpeg.st makewfil.v10 wrjpgcom.c
install.txt jconfig.mac jddctmgr.lo jidctflt.o makeadsw.vc6 makewmak.vc6 wrjpgcom.o
jaricom.c jconfig.manx jddctmgr.o jidctfst.c makeasln.v10 makewvcx.v10 wrppm.c
jaricom.lo jconfig.mc6 jdhuff.c jidctfst.lo makecdep.vc6 makljpeg.st wrppm.o
jaricom.o jconfig.sas jdhuff.lo jidctfst.o makecdsp.vc6 maktjpeg.st wrrle.c
jcapimin.c jconfig.st jdhuff.o jidctint.c makecfil.v10 makvms.opt wrrle.o
jcapimin.lo jconfig.txt jdinput.c jidctint.lo makecmak.vc6 missing wrtarga.c
jcapimin.o jconfig.vc jdinput.lo jidctint.o makecvcx.v10 rdbmp.c wrtarga.o
jcapistd.c jconfig.vms jdinput.o jinclude.h makeddep.vc6 rdbmp.o
jcapistd.lo jconfig.wat jdmainct.c jmemansi.c makeddsp.vc6 rdcolmap.c
jcapistd.o jcparam.c jdmainct.lo jmemdos.c makedfil.v10 rdcolmap.o
jcarith.c jcparam.lo jdmainct.o jmemdosa.asm makedmak.vc6 rdgif.c
jcarith.lo jcparam.o jdmarker.c jmemmac.c makedvcx.v10 rdgif.o
jcarith.o jcprepct.c jdmarker.lo jmemmgr.c makefile.ansi rdjpgcom
I'd like to use the program on multi-platform, so I'd rather not installed libjpeg library.

Answer 1

Use libjpeg in the compile command:
gcc main.c -ljpeg -o main.o
I wrote a tutorial for C: http://www.staerk.de/thorsten/C_Programming_Tutorial