[mpich-devel] ./configure --enable-timer-type help output missing

[Halim Amer]

 > At the very least, if I know to set the --enable-timer-type option, will
 > it be passed on to the child configure scripts if I pass it to the
 > top-level configure invocation?

Yes, configure options get propagated to the child scripts. That's part 
of the difficulty I think, because printing help information and doing 
option checking at the parent is difficult because the option might only 
be relevant for some descendant configure script.

--Halim

On 4/7/16 5:24 PM, Jeff Hammond wrote:
> Thanks.  I don't know the answer, but I thought there was a standard
> method for implementing this.  If the MPICH team doesn't know if, then I
> am certainly no help, since essentially all of my build systems and
> knowledge thereof are derived from MPICH :-)
>
> At the very least, if I know to set the --enable-timer-type option, will
> it be passed on to the child configure scripts if I pass it to the
> top-level configure invocation?
>
> Jeff
>
> On Thu, Apr 7, 2016 at 2:28 PM, Balaji, Pavan <balaji at anl.gov
> <mailto:balaji at anl.gov>> wrote:
>
>
>     It is convenient to have all the help output be present in the
>     top-level configure.  We need to figure out how to make that happen
>     while still allowing multiple independent packages inside MPICH.  We
>     don't have a good solution for that yet, but we are open to suggestions.
>
>        -- Pavan
>
>      > On Apr 7, 2016, at 3:24 PM, Jeff Hammond <jeff.science at gmail.com
>     <mailto:jeff.science at gmail.com>> wrote:
>      >
>      > I recall that the base configure script used to emit the help
>     associated with --enable-timer-type.  It no longer does so, although
>     the option is still present in src/mpl/configure.
>      >
>      > Do I have a reasonable expectation of seeing --help output for
>     all options in the base configure, or am I expected to run --help
>     against every configure in the tree?
>      >
>      > Thanks,
>      >
>      > Jeff
>      >
>      > jrhammon-mac01:git jrhammon$ ./configure --help | grep time
>      >         runtime   - error checking controllable at runtime
>     through environment
>      >         runtime - Runtime control of data collected
>      >         runtime         - Alias to "multiple"
>      >   --enable-mutex-timing   calculate the time spent waiting on mutexes
>      >                           speeds up one-time build
>      >                           sometimes confusing) to the casual
>     installer
>      >               User-defined run-time library search path.
>      > jrhammon-mac01:git jrhammon$ ./src/mpl/configure --help | grep time
>      >                           speeds up one-time build
>      >   --enable-timer-type=name - Select the timer to use for
>     MPI_Wtime and
>      >                              internal timestamps.
>      >         gethrtime          - Solaris timer (Solaris systems only)
>      >         clock_gettime      - Posix timer (where available)
>      >         gettimeofday       - Most Unix systems
>      >         linux86_cycle      - Linux x86; returns cycle counts, not
>     time in seconds*
>      >         gcc_ia64_cycle     - IPF ar.itc timer*
>      > mach_absolute_time - Mach absolute time (alternative to clock_gettime
>      >         device             - The timer is provided by the device
>      >         *Note that the cycle timers are intended to be used by
>      >               User-defined run-time library search path.
>      >
>      >
>      > --
>      > Jeff Hammond
>      > jeff.science at gmail.com <mailto:jeff.science at gmail.com>
>      > http://jeffhammond.github.io/
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> --
> Jeff Hammond
> jeff.science at gmail.com <mailto:jeff.science at gmail.com>
> http://jeffhammond.github.io/
>
>
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