[Buildroot] [Bug 6656] New: Build Qt5 with ccache

[Buildroot] [Bug 6656] New: Build Qt5 with ccache

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=6656

           Summary: Build Qt5 with ccache
           Product: buildroot
           Version: unspecified
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: minor
          Priority: P5
         Component: Other
        AssignedTo: unassigned at buildroot.uclibc.org
        ReportedBy: espenfk at gmail.com
                CC: buildroot at uclibc.org
   Estimated Hours: 0.0


Hello.

I have tried to get Buildroot (latest from git) to build Qt5 with ccache. Some
of the packages (at least) does it by defining the compiler to be something
like "$(CCACHE) $(TARGET_CROSS)". I tried to change the
package/qt/qt5base/qt5base.mk file to change the
output/build/qt5base-5.1.1/mkspecs/devices/linux-buildroot-g++/qmake.conf file
in such a way that ccache will work, but it fails.

It fails with:
Running configuration tests...
Failed to process makespec for platform 'devices/linux-buildroot-g++'
Project ERROR: CROSS_COMPILE needs to be set via -device-option
CROSS_COMPILE=<path>
Could not read qmake configuration file
/home/espenfk/imx6/buildroot/output/build/qt5base-5.1.1/mkspecs/devices/linux-buildroot-g++/qmake.conf.
Error processing project file: /dev/null

I have tried many things from the most obious and easy: patch line 230 in
package/qt/qt5base/qt5base.mk to:
$(call QT5BASE_CONFIG_SET,BUILDROOT_CROSS_COMPILE,$(CCACHE) $(TARGET_CROSS))

to use $(notdir $(TARGET_CROSS)) and adding $(dir $(TARGET_CROSS)) to the path
(also without ccache). But the only thing that seems to work is to have the
original setup and that does not work with ccache.

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[Buildroot] [Bug 6656] Build Qt5 with ccache

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=6656

Thomas Petazzoni <thomas.petazzoni@free-electrons.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED

--- Comment #1 from Thomas Petazzoni <thomas.petazzoni@free-electrons.com> 2014-01-07 07:34:33 UTC ---
Support for building Qt5 with ccache has been added in:

commit cb08d7b05db54eb7b2c52deabbd57c541777a422
Author: Fatih A??c? <fatih.asici@gmail.com>
Date:   Fri Nov 29 10:47:49 2013 +0200

    qt5base: use ccache if enabled

    For now, it doesn't use ccache when compiling host tools (e.g. qmake).
    It seems the fix is not trivial.

    Signed-off-by: Fatih A??c? <fatih.asici@gmail.com>
    Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

So I'm marking this bug as fixed.

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