Hi Alan
Did you see my subsequent email?
Phil
On 3 September 2015 at 22:20, Alan W. Irwin <ir...@beluga.phys.uvic.ca> wrote:
> On 2015-09-03 21:04+0100 Phil Rosenberg wrote:
>
>> Hi Alan
>> Yes I have it installed, but haven't really tried it much yet (I was
>> lured into playing with its new ability to us it to debug on a Linux
>> machine using GDB via ssh) I will try a PLPlot build now and see what
>> happens.
>>
>> I have just read the link you provided. It is a useful mov they are
>> making. I personally always use static linking to the runtime so that
>> if I give an exe to someone else it will "just work" and there is no
>> need for them to install a visual studio runtime (which must be the
>> correct VS version). The move to including the runtime as part of the
>> OS is more like the way I think Linux works, and there everyone builds
>> using dynamic linking to the runtime with generally good result.
>>
>> I don't really understand what the implication is for snprintf or
>> check_function_exists(). Why would having the CRT as part of the OS,
>> rather than as an installed component make any difference? Is this a
>> CMAke bug rather than a PLPlot bug?
>
>
> Hi Phil:
>
> I don't think we need to be concerned about bugs in
> check_function_exists() since it is really simple; it creates source
> code with a call to the required function, and checks that source code
> can be built and linked using the CMAKE_REQUIRED_* variables set by
> our build system.
>
> Normally, we don't set those CMAKE_REQUIRED_* variables at all, and
> check_function_exists(snprintf PL_HAVE_SNPRINTF) (or the alternative
> check_function_exists(_snprintf _PL_HAVE_SNPRINTF) just works without
> issues. However, from the bug report it appears that is not the case
> for VC14 and above. So the first step is to verify the problem on
> that platform, i.e., with
>
> cmake_minimum_required(VERSION 2.8.9)
> project(test_check C)
> message(STATUS "CMake version = ${CMAKE_VERSION}")
> message(STATUS "CMAKE_SYSTEM_NAME = ${CMAKE_SYSTEM_NAME}")
> include(CheckFunctionExists)
> check_function_exists(snprintf PL_HAVE_SNPRINTF)
> message(STATUS "PL_HAVE_SNPRINTF = ${PL_HAVE_SNPRINTF}")
> check_function_exists(_snprintf _PL_HAVE_SNPRINTF)
> message(STATUS "_PL_HAVE_SNPRINTF = ${_PL_HAVE_SNPRINTF}")
>
> Note the extra message commands for figuring out details of your test
> platform and the extra two commands for testing the function _snprintf
> compared to what I recommended before. If both PL_HAVE_SNPRINTF and
> _PL_HAVE_SNPRINTF are false you will have verified the problem, and we
> can take it from there by figuring out what CMAKE_REQUIRED_* variables
> need to be set so that one or both of PL_HAVE_SNPRINTF and
> _PL_HAVE_SNPRINTF are true.
>
>
> Alan
> __________________________
> Alan W. Irwin
>
> Astronomical research affiliation with Department of Physics and Astronomy,
> University of Victoria (astrowww.phys.uvic.ca).
>
> Programming affiliations with the FreeEOS equation-of-state
> implementation for stellar interiors (freeeos.sf.net); the Time
> Ephemerides project (timeephem.sf.net); PLplot scientific plotting
> software package (plplot.sf.net); the libLASi project
> (unifont.org/lasi); the Loads of Linux Links project (loll.sf.net);
> and the Linux Brochure Project (lbproject.sf.net).
> __________________________
>
> Linux-powered Science
> __________________________
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