perlqnx(1)



PERLQNX(1)             Perl Programmers Reference Guide             PERLQNX(1)

NAME
       perlqnx - Perl version 5 on QNX

DESCRIPTION
       As of perl5.7.2 all tests pass under:

         QNX 4.24G
         Watcom 10.6 with Beta/970211.wcc.update.tar.F
         socket3r.lib Nov21 1996.

       As of perl5.8.1 there is at least one test still failing.

       Some tests may complain under known circumstances.

       See below and hints/qnx.sh for more information.

       Under QNX 6.2.0 there are still a few tests which fail.  See below and
       hints/qnx.sh for more information.

   Required Software for Compiling Perl on QNX4
       As with many unix ports, this one depends on a few "standard" unix
       utilities which are not necessarily standard for QNX4.

       /bin/sh
           This is used heavily by Configure and then by perl itself. QNX4's
           version is fine, but Configure will choke on the 16-bit version, so
           if you are running QNX 4.22, link /bin/sh to /bin32/ksh

       ar  This is the standard unix library builder.  We use wlib. With
           Watcom 10.6, when wlib is linked as "ar", it behaves like ar and
           all is fine. Under 9.5, a cover is required. One is included in
           ../qnx

       nm  This is used (optionally) by configure to list the contents of
           libraries. I will generate a cover function on the fly in the UU
           directory.

       cpp Configure and perl need a way to invoke a C preprocessor. I have
           created a simple cover for cc which does the right thing. Without
           this, Configure will create its own wrapper which works, but it
           doesn't handle some of the command line arguments that perl will
           throw at it.

       make
           You really need GNU make to compile this. GNU make ships by default
           with QNX 4.23, but you can get it from quics for earlier versions.

   Outstanding Issues with Perl on QNX4
       There is no support for dynamically linked libraries in QNX4.

       If you wish to compile with the Socket extension, you need to have the
       TCP/IP toolkit, and you need to make sure that -lsocket locates the
       correct copy of socket3r.lib. Beware that the Watcom compiler ships
       with a stub version of socket3r.lib which has very little
       functionality. Also beware the order in which wlink searches
       directories for libraries. You may have /usr/lib/socket3r.lib pointing
       to the correct library, but wlink may pick up
       /usr/watcom/10.6/usr/lib/socket3r.lib instead. Make sure they both
       point to the correct library, that is,
       /usr/tcptk/current/usr/lib/socket3r.lib.

       The following tests may report errors under QNX4:

       dist/Cwd/Cwd.t will complain if `pwd` and cwd don't give the same
       results. cwd calls `fullpath -t`, so if you cd `fullpath -t` before
       running the test, it will pass.

       lib/File/Find/taint.t will complain if '.' is in your PATH. The PATH
       test is triggered because cwd calls `fullpath -t`.

       ext/IO/lib/IO/t/io_sock.t: Subtests 14 and 22 are skipped due to the
       fact that the functionality to read back the non-blocking status of a
       socket is not implemented in QNX's TCP/IP. This has been reported to
       QNX and it may work with later versions of TCP/IP.

       t/io/tell.t: Subtest 27 is failing. We are still investigating.

   QNX auxiliary files
       The files in the "qnx" directory are:

       qnx/ar
           A script that emulates the standard unix archive (aka library)
           utility.  Under Watcom 10.6, ar is linked to wlib and provides the
           expected interface. With Watcom 9.5, a cover function is required.
           This one is fairly crude but has proved adequate for compiling
           perl.

       qnx/cpp
           A script that provides C preprocessing functionality.  Configure
           can generate a similar cover, but it doesn't handle all the
           command-line options that perl throws at it. This might be
           reasonably placed in /usr/local/bin.

   Outstanding issues with perl under QNX6
       The following tests are still failing for Perl 5.8.1 under QNX 6.2.0:

         op/sprintf.........................FAILED at test 91
         lib/Benchmark......................FAILED at test 26

       This is due to a bug in the C library's printf routine.  printf("'%e'",
       0. ) produces '0.000000e+0', but ANSI requires '0.000000e+00'. QNX has
       acknowledged the bug.

   Cross-compilation
       Perl supports cross-compiling to QNX NTO through the Native Development
       Kit (NDK) for the Blackberry 10.  This means that you can cross-compile
       for both ARM and x86 versions of the platform.

       Setting up a cross-compilation environment

       You can download the NDK from
       <http://developer.blackberry.com/native/downloads/>.

       See
       <http://developer.blackberry.com/native/documentation/cascades/getting_started/setting_up.html>
       for instructions to set up your device prior to attempting anything
       else.

       Once you've installed the NDK and set up your device, all that's left
       to do is setting up the device and the cross-compilation environment.
       Blackberry provides a script, "bbndk-env.sh" (occasionally named
       something like "bbndk-env_10_1_0_4828.sh") which can be used to do
       this.  However, there's a bit of a snag that we have to work through:
       The script modifies PATH so that 'gcc' or 'ar' point to their cross-
       compilation equivalents, which screws over the build process.

       So instead you'll want to do something like this:

           $ orig_path=$PATH
           $ source $location_of_bbndk/bbndk-env*.sh
           $ export PATH="$orig_path:$PATH"

       Besides putting the cross-compiler and the rest of the toolchain in
       your PATH, this will also provide the QNX_TARGET variable, which we
       will pass to Configure through -Dsysroot.

       Preparing the target system

       It's quite possible that the target system doesn't have a readily
       available /tmp, so it's generall safer to do something like this:

        $ ssh $TARGETUSER@$TARGETHOST 'rm -rf perl; mkdir perl; mkdir perl/tmp'
        $ export TARGETDIR=`ssh $TARGETUSER@$TARGETHOST pwd`/perl
        $ export TARGETENV="export TMPDIR=$TARGETDIR/tmp; "

       Later on, we'll pass this to Configure through -Dtargetenv

       Calling Configure

       If you are targetting an ARM device -- which currently includes the
       vast majority of phones and tablets -- you'll want to pass
       -Dcc=arm-unknown-nto-qnx8.0.0eabi-gcc to Configure.  Alternatively, if
       you are targetting an x86 device, or using the simulator provided with
       the NDK, you should specify -Dcc=ntox86-gcc instead.

       A sample Configure invocation looks something like this:

           ./Configure -des -Dusecrosscompile \
               -Dsysroot=$QNX_TARGET          \
               -Dtargetdir=$TARGETDIR         \
               -Dtargetenv="$TARGETENV"       \
               -Dcc=ntox86-gcc                \
               -Dtarghost=... # Usual cross-compilation options

AUTHOR
       Norton T. Allen (allen@huarp.harvard.edu)

perl v5.26.2                      2018-06-09                        PERLQNX(1)

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