Need help compiling jpegtran.c code from libjpeg

Question

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I am running into a number of odd problems. For starters, I\'m using the latest Eclipse CDT and before implementing d

Answer 1

I had something similar happen when developing with MinGW a couple of years ago. I had to download the source for libjpeg and build it on my machine in order to get the libjpeg.a file. The source can be found here:

http://www.ijg.org/

The problem that I found when I built this library was that when I executed 'nm libjpeg.a' it became clear that the symbols in cdjpeg.h and transupp.h were not being compiled into the library. I couldn't find a way to do it via configure since I didn't see anything obvious when I did 'configure --help'. Instead I edited the Makefile.in file where it defines the am__objects_1 list of .lo files. I added cdjpeg and transupp at the end like this:

am__objects_1 = jaricom.lo jcapimin.lo jcapistd.lo jcarith.lo \
    jccoefct.lo jccolor.lo jcdctmgr.lo jchuff.lo jcinit.lo \
    jcmainct.lo jcmarker.lo jcmaster.lo jcomapi.lo jcparam.lo \
    jcprepct.lo jcsample.lo jctrans.lo jdapimin.lo jdapistd.lo \
    jdarith.lo jdatadst.lo jdatasrc.lo jdcoefct.lo jdcolor.lo \
    jddctmgr.lo jdhuff.lo jdinput.lo jdmainct.lo jdmarker.lo \
    jdmaster.lo jdmerge.lo jdpostct.lo jdsample.lo jdtrans.lo \
    jerror.lo jfdctflt.lo jfdctfst.lo jfdctint.lo jidctflt.lo \
    jidctfst.lo jidctint.lo jquant1.lo jquant2.lo jutils.lo \
    jmemmgr.lo cdjpeg.lo transupp.lo @MEMORYMGR@.lo

Then I did a 'make' and a 'make install' and the symbols were present in the library. At that point I was able to get your code to build. An autotools expert may be able to come up with a better way to do it but this will at least get you going.