lipjpeg7 in static library
kevin.rushforth at oracle.com
Thu Jan 25 15:41:13 UTC 2018
> In the end, we link all static libs + object files in a single
I see. I had missed that you said "libjavafx_iio.a", meaning static
linking. No, I don't know how to make that work, either. Name mangling
might be the best solution then.
Johan Vos wrote:
> At the risk of being stupid, but I don't see how I could make the JPEG
> symbols invisible, as they are still needed by the native functions in
> javafx_iio (in jpegloader.c).
> If they are invisible, jpegloader.o won't be able to access them
> either, no? In the end, we link all static libs + object files in a
> single executable.
> If they were in the same file as jpegloader, I would make them static
> so they wouldn't be exported, but I don't know how I can make those
> symbols available to jpegloader.c without exporting them?
> - Johan
> On Wed, Jan 24, 2018 at 6:24 PM Kevin Rushforth
> <kevin.rushforth at oracle.com <mailto:kevin.rushforth at oracle.com>> wrote:
> Hiding the symbols seems like a better solution than shipping two
> binaries, and is probably easier than mangling the symbols.
> -- Kevin
> Phil Race wrote:
> > Does libjavafx_iio.a really need to export the JPEG symbols ?
> > On Windows, or Linux, or Solaris .. there are ways
> > to limit the exported symbols from a library.
> > I found this page for macos :
> > Not a complete answer but maybe somewhere to start.
> > -phil.
> > On 01/24/2018 02:42 AM, Johan Vos wrote:
> >> Hi,
> >> We are currently building a native library for javafx_iio which
> >> libjpeg7. As a consequence, those symbols are included in the
> >> libjavafx_iio.a on iOS. If we add other libraries (e.g. OpenCV)
> this can
> >> result in duplicate symbols, as the libjpeg7 library might be
> >> included in
> >> other frameworks as well.
> >> As a dirty hack, I build 2 versions of libjavafx_iio.a: one with
> >> libjpeg7,
> >> and one without. A better solution might be to prefix the
> symbols in the
> >> libjpeg7 files.
> >> Or are there better ideas?
> >> Thanks,
> >> - Johan
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