Problems building zsh on QNX 6.1

Problems building zsh on QNX 6.1

[dwolfe]

Hello...  I wanted to report some trouble I had building zsh 4.0.2 for
QNX 6.1.  I was ultimately successful in getting it to compile, but
there were a few minor problems.  Also, I'm not sure whether the
work-around I used led to a proper executable.  (It seems to work
fine.)

The 'out-of-the-box' QNX installation choked when I ran ./configure in
the build directory as follows:

# pwd
/usr/local/src/zsh-4.0.2

# ./configure
creating cache ./config.cache
configuring for zsh 4.0.2
checking host system type... x86-pc-nto-qnx
checking for gcc... gcc
[... stuff omitted ... ]
checking for Cygwin environment... no
checking for mingw32 environment... no
checking for executable suffix... configure: error: installation or
configuration problem: compiler cannot create executables.


A look in config.log showed the following:

configure:1628: checking for executable suffix
configure:1638: gcc -o conftest  -Wall -Wno-implicit
-Wmissing-prototypes -O2 -D_LARGEFILE_SOURCE undefined  conftest.c
undefined 1>&5
gcc: undefined: No such file or directory
gcc: undefined: No such file or directory

LIBS and LDFLAGS were both getting set to 'undefined'.  Can anyone
explain why?  (Don't know if it matters, but /bin/sh is a link to ksh
on QNX; is this a Korn shell thing?) I was able to get the configure
script to complete by explicitly setting a few variables:

# export LIBS=""
# export LDFLAGS=""

But then the make failed with the following message:

make[3]: Entering directory `/usr/local/src/zsh-4.0.2/Src/Builtins'
gawk -f ./rlimits.awk /usr/include/sys/resource.h /dev/null > rlimits.h
gcc -c -I.  -DHAVE_CONFIG_H -Wall -Wno-implicit -Wmissing-prototypes
-O2 -o rlimits.o rlimits.c
rlimits.c: In function `printulimit':
rlimits.c:200: duplicate case value
rlimits.c:172: this is the first entry for that value
rlimits.c: In function `bin_ulimit':
rlimits.c:558: duplicate case value
rlimits.c:552: this is the first entry for that value
make[3]: *** [rlimits.o] Error 1
make[3]: Leaving directory `/usr/local/src/zsh-4.0.2/Src/Builtins'
make[2]: *** [modobjs] Error 1
make[2]: Leaving directory `/usr/local/src/zsh-4.0.2/Src'
make[1]: *** [modobjs] Error 2
make[1]: Leaving directory `/usr/local/src/zsh-4.0.2/Src'
make: *** [all] Error 1


A look in rlimits.c led me to the conclusion that RLIMIT_VMEM and
RLIMIT_RSS were being #defined to the same thing (namely, the decimal
value '6').  So, I commented out the case statements at line 200 and
558.  After doing so, the make completed successfully.


This is all heavy wizardry to me, so I'm unable to suggest a fix;
however, I'd love to help in any way I can.  Please email me directly
if any further information is required.

Regards,

- Dave Wolfe
  gForce Techologies, Inc.



This is all heavy wizardry to me, so I'm unable to suggest fixes;
however, I'd love to help in any way I can.  Please email me directly
if
any further information is required.

Regards,

- Dave Wolfe
  gForce Techologies, Inc.

RE: Problems building zsh on QNX 6.1

[Borsenkow Andrej]

> 
> Hello...  I wanted to report some trouble I had building zsh 4.0.2 for
> QNX 6.1. 

could you please try with 4.0.4 just to be sure it still has the same
problems there?


-andrej

Re: Problems building zsh on QNX 6.1

[dwolfe]

> > Hello...  I wanted to report some trouble I had building zsh 4.0.2
> > for QNX 6.1.

Borsenkow Andrej <Andrej.Borsenkow@mow.siemens.ru> wrote:

> could you please try with 4.0.4 just to be sure it still has the same
> problems there?
>
>
> -andrej


Oh, I'm sorry--I thought I downloaded the latest version.  (The only
version available at the foad.org mirror was zsh-4.0.2.)


The 'configure' script for zsh-4.0.4 works fine under QNX 6.1, but I
still get the following error when I make:

make[3]: Entering directory `/usr/local/src/zsh-4.0.4/Src/Builtins'
gawk -f ./rlimits.awk /usr/include/sys/resource.h /dev/null > rlimits.h
gcc -c -I.  -DHAVE_CONFIG_H -Wall -Wno-implicit -Wmissing-prototypes
-O2 -o rlimits.o rlimits.c
rlimits.c: In function `bin_ulimit':
rlimits.c:569: duplicate case value
rlimits.c:563: this is the first entry for that value
make[3]: *** [rlimits.o] Error 1
make[3]: Leaving directory `/usr/local/src/zsh-4.0.4/Src/Builtins'
make[2]: *** [modobjs] Error 1
make[2]: Leaving directory `/usr/local/src/zsh-4.0.4/Src'
make[1]: *** [modobjs] Error 2
make[1]: Leaving directory `/usr/local/src/zsh-4.0.4/Src'
make: *** [all] Error 1

The following snippet of the output from 'gcc -E rlimit.c':

    if (strcmp(*argv, "unlimited")) {

        rlim_t limit;
        limit = zstrtorlimt(*argv, 0 , 10);

        switch (res) {
        case 1 :
        case 4 :
        limit *= 512;
        break;
        case 2 :
        case 3 :
        case 6  :
        case 7 :
        case 6  :
        limit *= 1024;
        break;
        }

reveals that RLIMIT_RSS and RLIMIT_VMEM are both expanding to '6'.


Please let me know if I can be of any help resolving this...

- Dave

Re: Problems building zsh on QNX 6.1

[David Wolfe]

>  ... RLIMIT_RSS and RLIMIT_VMEM are both expanding to '6'.

Hmm.  I was curious about this, so I checked <sys/resource.h> on QNX 6.1:

#define RLIMIT_AS       6       /* Limit on address space size. */
#define RLIMIT_VMEM     RLIMIT_AS
#define RLIMIT_RSS      RLIMIT_AS


RLIMIT_VMEM, RLIMIT_RSS and RLIMIT_AS are all identical.  I'm guessing
this is because QNX is a realtime OS and doesn't limit how much memory
one process is allowed to use?

Anyway, I decided to roll up my sleeves and take a crack at fixing this.
It turns out that someone else had already done all the work!  I merely
copied a few lines down to where they needed to go.

I humbly submit the following patch.  (Please reply directly with
any comments, as I'm not subscribed to the list...)

- Dave


*** rlimits.c   Tue Jun  4 16:23:08 2002
--- rlimits.c.new   Tue Jun  4 16:27:52 2002
*************** bin_ulimit(char *name, char **argv, char
*** 565,571 ****
  # ifdef RLIMIT_MEMLOCK
        case RLIMIT_MEMLOCK:
  # endif /* RLIMIT_MEMLOCK */
! # ifdef RLIMIT_VMEM
        case RLIMIT_VMEM:
  # endif /* RLIMIT_VMEM */
  # ifdef RLIMIT_AIO_MEM
--- 565,573 ----
  # ifdef RLIMIT_MEMLOCK
        case RLIMIT_MEMLOCK:
  # endif /* RLIMIT_MEMLOCK */
! /* If RLIMIT_VMEM and RLIMIT_RSS are defined and equal, avoid *
!  * duplicate case statement.  Observed on QNX Neutrino 6.1.0. */
! # if defined(RLIMIT_VMEM) && (!defined(RLIMIT_RSS) || RLIMIT_RSS !=
RLIMIT_VMEM)
        case RLIMIT_VMEM:
  # endif /* RLIMIT_VMEM */
  # ifdef RLIMIT_AIO_MEM

Re: Problems building zsh on QNX 6.1

[Peter Stephenson]

"David Wolfe" wrote:
> Anyway, I decided to roll up my sleeves and take a crack at fixing this.
> It turns out that someone else had already done all the work!  I merely
> copied a few lines down to where they needed to go.

You're quite right, I fixed it partially for 4.0.4 but didn't have a
suitable system to check it on, so missed the ulimit chunk.  I'll whack
this straight onto both lines.

Thanks.
-- 
Peter Stephenson <pws@csr.com>                  Software Engineer
CSR Ltd., Science Park, Milton Road,
Cambridge, CB4 0WH, UK                          Tel: +44 (0)1223 392070


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