A pkg-config file for OpenJDK

[Martijn Verburg]

Hi Omair,

Looks like a good idea to me, we've had a number of issues with this in
practice (we have a desktop tool on Linux) - could probably be backported
to 7u as well...?

Cheers,
Martijn


On 26 June 2014 15:56, Omair Majid <omajid at redhat.com> wrote:

> Hi,
>
> Over in Fedora, we have received requests from developers asking that
> compiling JNI programs and liking against the JVM be made easier [0]
> [1]. Some of the current difficulties include that the VM type (server,
> client) is not known by other programs and so they have to fall back to
> guessing where the libjvm.so that they should link against is.
>
> One standard approach on Linux for making linking against programs
> easier is to use pkg-config [1] files.
>
> A pkg-config file essentially describes the CFLAGS and LDFLAGS that need
> to be passed to the compiler and the linker to compile and link a
> program successfully, without knowing anything other than the name of
> the program or library to compile/link against.
>
> On Fedora/x86_64, such a file might look like (for OpenJDK 8):
>
> > jdk=/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.5.x86_64
> > jre=/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.5.x86_64/jre
> > lib_arch=/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.5.x86_64/jre/lib/amd64
>
> > Name: java-1.8.0-openjdk
> > Description: OpenJDK 8
> > Version: 1.8.0.5
> > Cflags: -I${jdk}/include -I${jdk}/include/linux
> > Libs: -L${lib_arch} -L${lib_arch}/server -ljvm -ljava
>
> Rather than doing something Fedora-specific, I would like to propose
> carrying a template of this file upstream as part of the OpenJDK
> project. Then, each distribution could modify it and change only the
> bits that are specific to that distribution, and clients can rely on
> having common or well-known names for everything else.
>
> One nice-to-have feature would be keep this file somewhat generic, so
> other JPackage-style non-OpenJDK JDKs could adapt it too. That's why I
> have used `java-1.8.0-openjdk` as the name above, but I am open to
> changing it to whatever the consensus is.
>
> Does anyone else have any thoughts or comments about this?
>
> Thanks,
> Omair
>
> [0] https://bugzilla.redhat.com/show_bug.cgi?id=449456
> [1] https://bugzilla.redhat.com/show_bug.cgi?id=740762
> [2] http://people.freedesktop.org/~dbn/pkg-config-guide.html
>
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