Help on Compiling on AIX?

It's been a long time since I compiled anything on AIX (thankfully) and I do feel your pain having spent a good year or so trying to get our company's JNI and other software libraries built on AIX I do seem to remember that GCC never worked particularly well as it always came up with similar errors. Is there any option to use the native compiler (xlC)? Failing that I would check the ordering of your libraries, it plays a big part in making stuff work properly I take it that you have use the nm utility to iterate through every library in /usr/lib (etc) to find where the missing symbols are located?

It's been a long time since I compiled anything on AIX (thankfully) and I do feel your pain having spent a good year or so trying to get our company's JNI and other software libraries built on AIX. I do seem to remember that GCC never worked particularly well as it always came up with similar errors. Is there any option to use the native compiler (xlC)?

Failing that I would check the ordering of your libraries, it plays a big part in making stuff work properly.. I take it that you have use the nm utility to iterate through every library in /usr/lib (etc) to find where the missing symbols are located?

Those are math symbols. Try adding -lm to your link line.

I've seen that sort of error when using a version of GCC compiled on a down-version of AIX. For example, if the GCC was compiled for AIX 4.3.3 and is being run on AIX 5.x. Usually, if GCC was compiled on an up-version of AIX, it won't run on the down-version, so that is unlikely to be the problem.

One other (rather unlikely) possibility: is your GCC installed where it was compiled to expect to be installed? When you build it, you specify (possibly implicitly) the install location (by default, under /usr/local). If you have your copy installed somewhere else, but there's an old GCC in /usr/local and your copy expects to be installed in /usr/local, then you can run into this sort of problem.

This is much less likely than version mismatching.

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