kumquat-buildroot/docs/manual/adding-packages-qmake.txt

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package/pkg-qmake: new qmake package infrastructure This provides generic functions for Qt5 qmake based packages. It will make it possible to remove lots of redefinition of QT5_xxx_{CONFIGURE|BUILD|INSTALL_STAGING}_CMDS. Additionally it provides a generic target install method which will make most of the package specific commands obsolete. This is done by re-running the install step of the qmake generated Makefile with the package build directory prepended (to the staging/host path). Even though this does create lengthy pathes it allows for easy separation of the staging files from the host destined files by just omitting the resulting BUILD_DIR+HOST_DIR path from the following rsync call to the real target folder. The cleanup of many files we dont want in target is deferred to the target-finalize step. In addition to what's being removed already, we also have to cleanup some Qt5 specific files (prl) and the documentation directory. This approach was chosen over copying all files recorded in the pkg-files-list after some discussion which Thomas Petazzoni summed up: "We don't yet use pkg-files-list really as part of the build process anywhere, I feel a bit more comfortable at this point with what Andreas is proposing." Thanks to this infrastructure, it will be possible to get rid of the many conditional install commands because qmake already takes care of this when generating the Makefile install targets with the given or autodetected configure options of each package. However, custom install steps may have to remain in cases where a particular Buildroot option has no corresponding setting in the packages configuration options. Signed-off-by: Andreas Naumann <anaumann@ultratronik.de> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
2020-02-17 22:23:24 +01:00
// -*- mode:doc; -*-
// vim: set syntax=asciidoc:
=== Infrastructure for QMake-based packages
[[qmake-package-tutorial]]
==== +qmake-package+ tutorial
First, let's see how to write a +.mk+ file for a QMake-based package, with
an example :
------------------------
01: ################################################################################
02: #
03: # libfoo
04: #
05: ################################################################################
06:
07: LIBFOO_VERSION = 1.0
08: LIBFOO_SOURCE = libfoo-$(LIBFOO_VERSION).tar.gz
09: LIBFOO_SITE = http://www.foosoftware.org/download
10: LIBFOO_CONF_OPTS = QT_CONFIG+=bar QT_CONFIG-=baz
11: LIBFOO_DEPENDENCIES = bar
12:
13: $(eval $(qmake-package))
------------------------
On line 7, we declare the version of the package.
On line 8 and 9, we declare the name of the tarball (xz-ed tarball
recommended) and the location of the tarball on the Web. Buildroot
will automatically download the tarball from this location.
On line 10, we tell Buildroot what options to enable for libfoo.
On line 11, we tell Buildroot the depednencies of libfoo.
Finally, on line line 13, we invoke the +qmake-package+
macro that generates all the Makefile rules that actually allows the
package to be built.
[[qmake-package-reference]]
==== +qmake-package+ reference
The main macro of the QMake package infrastructure is +qmake-package+.
It is similar to the +generic-package+ macro.
Just like the generic infrastructure, the QMake infrastructure works
by defining a number of variables before calling the +qmake-package+
macro.
First, all the package metadata information variables that exist in
the generic infrastructure also exist in the QMake infrastructure:
+LIBFOO_VERSION+, +LIBFOO_SOURCE+, +LIBFOO_PATCH+, +LIBFOO_SITE+,
+LIBFOO_SUBDIR+, +LIBFOO_DEPENDENCIES+, +LIBFOO_INSTALL_STAGING+,
+LIBFOO_INSTALL_TARGET+.
An additional variable, specific to the QMake infrastructure, can
also be defined.
* +LIBFOO_CONF_ENV+, to specify additional environment variables to
pass to the +qmake+ script for the configuration step. By default, empty.
* +LIBFOO_CONF_OPTS+, to specify additional options to pass to the
+qmake+ script for the configuration step. By default, empty.
* +LIBFOO_MAKE_ENV+, to specify additional environment variables to the
+make+ command during the build and install steps. By default, empty.
* +LIBFOO_MAKE_OPTS+, to specify additional targets to pass to the
+make+ command during the build step. By default, empty.
* +LIBFOO_INSTALL_STAGING_OPTS+, to specify additional targets to pass
to the +make+ command during the staging installation step. By default,
+install+.
* +LIBFOO_INSTALL_TARGET_OPTS+, to specify additional targets to pass
to the +make+ command during the target installation step. By default,
+install+.