[Development] Getting build flags for platforms without pkg-config

[Konstantin Tokarev]

31.10.2017, 00:56, "Thiago Macieira" <thiago.macieira at intel.com>:
> On segunda-feira, 30 de outubro de 2017 09:46:42 PDT jeandet wrote:
>>  > AFAIK there no technical reason why providing .pc files for MSVC and
>>  > macOS
>>  > frameworks would be impossible.
>>
>>  I agree, I would add that and even without pkg-config parsing pc files
>>  seems more reasonable than parsing pri files.
>
> I don't see how one is more difficult than the other, technically speaking.
> They're both just a bunch of assignments, though the .pri file seems to depend
> on some variables not defined in the file, but which can be easily inferred.
>
> The two important details, though:
> 1) pkg-config is a standardised file format, the .pri isn't

Also there is a possibility that in future qmake will be removed, and there will
be no more .pri files.

> 2) the .pri file has the list of plugin types, to help static building and the
> *deployqt tools.

Missing information like this can be added to .pc as custom variables, which
could be queried via pkg-config (or parsed directly from .pc).

>
> $ cat mkspecs/modules/qt_lib_network.pri lib/pkgconfig/Qt5Network.pc
> QT.network.VERSION = 5.10.0
> QT.network.name = QtNetwork
> QT.network.module = Qt5Network.t
> QT.network.libs = $$QT_MODULE_LIB_BASE
> QT.network.includes = $$QT_MODULE_INCLUDE_BASE $$QT_MODULE_INCLUDE_BASE/
> QtNetwork
> QT.network.frameworks =
> QT.network.bins = $$QT_MODULE_BIN_BASE
> QT.network.plugin_types = bearer
> QT.network.depends = core
> QT.network.uses =
> QT.network.module_config = v2
> QT.network.DEFINES = QT_NETWORK_LIB
> QT.network.enabled_features = networkinterface bearermanagement ftp http
> localserver networkdiskcache networkproxy sctp socks5 ssl udpsocket
> QT.network.disabled_features = opensslv11
> QT_CONFIG += networkinterface bearermanagement ftp getifaddrs http ipv6ifname
> localserver networkdiskcache networkproxy sctp socks5 ssl udpsocket
> QT_MODULES += network
> prefix=/home/tjmaciei/obj/qt/qt5/qtbase
> exec_prefix=${prefix}
> libdir=${prefix}/lib
> includedir=${prefix}/include
>
> Name: Qt5 Network
> Description: Qt Network module
> Version: 5.10.0
> Libs: -L${libdir} -lQt5Network.t
> Cflags: -I${includedir}/QtNetwork -I${includedir}
> Requires: Qt5Core
>
> --
> Thiago Macieira - thiago.macieira (AT) intel.com
>   Software Architect - Intel Open Source Technology Center
>
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-- 
Regards,
Konstantin