[Bug 2932] New: [IcedTea8] Support ccache in a non-automagic manner

[bugzilla-daemon at icedtea.classpath.org]

http://icedtea.classpath.org/bugzilla/show_bug.cgi?id=2932

            Bug ID: 2932
           Summary: [IcedTea8] Support ccache in a non-automagic manner
           Product: IcedTea
           Version: 8-hg
          Hardware: all
                OS: All
            Status: NEW
          Severity: normal
          Priority: P5
         Component: IcedTea
          Assignee: gnu.andrew at redhat.com
          Reporter: chewi at gentoo.org
                CC: unassigned at icedtea.classpath.org

OpenJDK doesn't allow you to use ccache via wrapper symlinks added to the PATH,
even though this is normally how it is setup. This affects Gentoo, where
FEATURES="ccache" automatically adds these wrappers to the PATH for you.
Gentoo's ebuild therefore currently strips the PATH like this.

PATH=$(sed 's#[^:]*/ccache/bin:##g' <<< "${PATH}")

This alone is insufficient as ccache is still detected automagically. Since
IcedTea currently doesn't pass through the --disable-ccache option, the only
way to explicitly disable it right now is to set enable_ccache=no.

Andrew has suggested that IcedTea not support the option but supply it to
OpenJDK based on whether wrappers are found in the PATH, while stripping the
PATH for you. This would work well for Gentoo though others may find it odd.
I'll let him decide!

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