Add a Qmake package to buildroot

Question

I'm trying to add a Qmake package to buildroot, the package is called DummyPgm. I've managed to get it into the menu and select it, but during the build process the Makefile isn't found. I get an error message saying:

>>> dummypgm 0.1.0 Extracting
gzip -d -c /home/kellyj/BuildSystem/buildroot/dl/DummyPgm-0.1.0.tar.gz | tar --strip-components=1 -C /home/kellyj/BuildSystem/buildroot/output/build/dummypgm-0.1.0  -xf -

>>> dummypgm 0.1.0 Patching

>>> dummypgm 0.1.0 Configuring
/home/kellyj/BuildSystem/buildroot/output/host/usr/bin/qmake -o Makefile -v /home/kellyj/BuildSystem/buildroot/output/build/dummypgm-0.1.0/MsgDisplay.pro
QMake version 3.0
Using Qt version 5.3.1 in /home/kellyj/BuildSystem/buildroot/output/host/usr/arm-buildroot-linux-uclibcgnueabi/sysroot/usr/lib

>>> dummypgm 0.1.0 Building
/usr/bin/make -j3 -C /home/kellyj/BuildSystem/buildroot/output/build/dummypgm-0.1.0
make[1]: Entering directory `/home/kellyj/BuildSystem/buildroot/output/build/dummypgm-0.1.0'
make[1]: *** No targets specified and no makefile found.  Stop.
make[1]: Leaving directory `/home/kellyj/BuildSystem/buildroot/output/build/dummypgm-0.1.0'
make: *** [/home/kellyj/BuildSystem/buildroot/output/build/dummypgm-0.1.0/.stamp_built] Error 2

My .mk file contains the following:

DUMMYPGM_VERSION = 0.1.0
DUMMYPGM_SOURCE = DummyPgm-$(DUMMYPGM_VERSION).tar.gz
DUMMYPGM_INSTALL_STAGING = YES
DUMMYPGM_INSTALL_TARGET = YES

define DUMMYPGM_CONFIGURE_CMDS
    $(HOST_DIR)/usr/bin/qmake -o Makefile -v $(@D)/MsgDisplay.pro
endef

define DUMMYPGM_BUILD_CMDS
    $(MAKE) -C $(@D)
endef

define DUMMYPGM_INSTALL_TARGET_CMDS
    install -D -m 0755 $(@D)
$(TARGET_DIR)/usr/bin/MsgDisplay
endef

$(eval $(generic-package))

It seems that the Makefile is never created, or at least that it is created in the wrong place. The directory output/build/dummypgm-0.1.0 contains these files:

MsgDisplay.pri  MsgDisplay.pro  MsgDisplay.pro.user  MsgHandler.cpp  MsgHandler.h  MsgServer.cpp  MsgServer.h  Tcp  Tools  main.cpp

so MsgDisplay.pro is present.

I've tried running the command /home/kellyj/BuildSystem/buildroot/output/host/usr/bin/qmake -o Makefile -v /home/kellyj/BuildSystem/buildroot/output/build/dummypgm-0.1.0/MsgDisplay.pro by hand in my home area and I see no error message, but no Makefile is produced.

If someone could help me figure this out I'd be extremely grateful.

Have not much experience with QMake, but if it is your own package, you could try CMake instead. Had so far no problems at least with Qt4 and BR. — yegorich, Nov 18 '14 at 16:43
Unfortunately it's not my package. I am trying to add someone else's package to buildroot. I am not allowed access to their source code and they are reluctant to repackage it. Is repackaging with CMake complicated? I could take another shot at persuading them, but I've had no look so far. — James, Nov 18 '14 at 16:47
CMake is generally a good instrument. But if it is not going to be repackaged, I'd suggest to post your question on BR's [mailing list](http://buildroot.uclibc.org/support.html). — yegorich, Nov 18 '14 at 20:15

score 3 · Answer 1 · answered Nov 19 '14 at 08:49

Yes, this part of your code is wrong:

define DUMMYPGM_CONFIGURE_CMDS
    $(HOST_DIR)/usr/bin/qmake -o Makefile -v $(@D)/MsgDisplay.pro
endef

It may not be obvious at first sight, but you have to realize that all commands are executed in the top-level source directory of Buildroot. So I suspect you most likely overwrite the main Buildroot Makefile, instead of creating the Makefile in output/build/dummypgm-0.1.0 as you expected.

You should therefore do like is done in the QWT package in Buildroot (see package/qwt/qwt.mk):

define DUMMYPGM_CONFIGURE_CMDS
    (cd $(@D); $(TARGET_MAKE_ENV) $(QT_QMAKE))
endef

This will go into the output/build/dummypgm-0.1.0 (i.e $(@D)) and will invoke qmake from there. QT_QMAKE is a variable made available by Buildroot to allow other packages to call qmake with the proper arguments.

Add a Qmake package to buildroot

1 Answers1