[Development] Qt and IoT infographic

[Thiago Macieira]

On Monday, 28 August 2017 07:01:07 PDT Jason H wrote:
> Onto my criticisms of Qt wrt IoT:
> 
> 2. ZeroConf should be a standard thing. Where's Qt's support?

Right now, in KF5 (kdnssd).

> 3.  IoT generally use web services, namely RESTful APIs. Where's Qt's
> support for writing a RESTful server? 

Timur began working on an simple HTTP server. This is a controversial 
decision, since we've long said that Qt should not be the tool for server-side 
programs.

But I dispute your assertion that it should be "web services". That's why I 
want to work on CoAP, which is much simpler than HTTP. It's still REST, but 
not web.

> b. Remove
> the GL dependency for QML, so that QML can function as a way to make a
> headless HTTP server that makes it trivial to map HTTP requests to QObjects
> or QML Elements**.

QML does not have a GL dependency. Or, for that matter, a graphical one.

 ldd $QTLIBDIR/libQt5Qml.t.so.5
        linux-vdso.so.1 (0x00007ffe33fcf000)
        libQt5Network.t.so.5 => /home/tjmaciei/obj/qt/qt5/qtbase/lib/
libQt5Network.t.so.5 (0x00007fcaa427a000)
        libQt5Core.t.so.5 => /home/tjmaciei/obj/qt/qt5/qtbase/lib/
libQt5Core.t.so.5 (0x00007fcaa3bfd000)
        libpthread.so.0 => /lib64/libpthread.so.0 (0x00007fcaa39df000)
        libdl.so.2 => /lib64/libdl.so.2 (0x00007fcaa37db000)
        libstdc++.so.6 => /usr/lib64/libstdc++.so.6 (0x00007fcaa3453000)
        libm.so.6 => /lib64/libm.so.6 (0x00007fcaa3141000)
        libc.so.6 => /lib64/libc.so.6 (0x00007fcaa2d9b000)
        libz.so.1 => /lib64/libz.so.1 (0x00007fcaa2b84000)
        libssl.so.1.0.0 => /usr/lib64/libssl.so.1.0.0 (0x00007fcaa2916000)
        libcrypto.so.1.0.0 => /usr/lib64/libcrypto.so.1.0.0 
(0x00007fcaa24a9000)
        libsystemd.so.0 => /usr/lib64/libsystemd.so.0 (0x00007fcaa2215000)
        libicui18n.so.59.1 => /usr/lib64/libicui18n.so.59.1 
(0x00007fcaa1d88000)
        libicuuc.so.59.1 => /usr/lib64/libicuuc.so.59.1 (0x00007fcaa19d0000)
        libpcre2-16.so.0 => /usr/lib64/libpcre2-16.so.0 (0x00007fcaa1762000)
        libdouble-conversion.so.1 => /usr/lib64/libdouble-conversion.so.1 
(0x00007fcaa1551000)
        libglib-2.0.so.0 => /usr/lib64/libglib-2.0.so.0 (0x00007fcaa123b000)
        libgcc_s.so.1 => /lib64/libgcc_s.so.1 (0x00007fcaa1024000)
        /lib64/ld-linux-x86-64.so.2 (0x00007fcaa4bd5000)
        libresolv.so.2 => /lib64/libresolv.so.2 (0x00007fcaa0e0e000)
        libselinux.so.1 => /lib64/libselinux.so.1 (0x00007fcaa0be7000)
        libcap.so.2 => /usr/lib64/libcap.so.2 (0x00007fcaa09e2000)
        librt.so.1 => /lib64/librt.so.1 (0x00007fcaa07da000)
        liblzma.so.5 => /usr/lib64/liblzma.so.5 (0x00007fcaa059f000)
        liblz4.so.1 => /usr/lib64/liblz4.so.1 (0x00007fcaa038b000)
        libgcrypt.so.20 => /usr/lib64/libgcrypt.so.20 (0x00007fcaa007b000)
        libgpg-error.so.0 => /usr/lib64/libgpg-error.so.0 (0x00007fca9fe66000)
        libicudata.so.59.1 => /usr/lib64/libicudata.so.59.1 
(0x00007fca9fc65000)
        libpcre.so.1 => /usr/lib64/libpcre.so.1 (0x00007fca9f9d8000)

No, QtGui, no GL, no X11, nothing.

-- 
Thiago Macieira - thiago.macieira (AT) intel.com
  Software Architect - Intel Open Source Technology Center