Re: [Vxl-maintainers] CMake 1.6 beta

[William A. H. <bil...@ny...>]

Although the vcl configure script is 450K, the input files are much smaller:

$ wc -l configure.in
    364 configure.in

$ wc -l aclocal.m4
   1355 aclocal.m4

And, after doing a few of the functions, it should go pretty quick.
For example, all of these:
AC_CXX_HAS_HEADER(cassert,VCL_CXX_HAS_HEADER_CASSERT)
AC_CXX_HAS_HEADER(ciso646,VCL_CXX_HAS_HEADER_CISO646)
AC_CXX_HAS_HEADER(csetjmp,VCL_CXX_HAS_HEADER_CSETJMP)
AC_CXX_HAS_HEADER(cstdio,VCL_CXX_HAS_HEADER_CSTDIO)

Can be done like this:
INCLUDE(${CMAKE_ROOT}/Modules/CheckIncludeFileCXX.cmake)
CHECK_INCLUDE_FILE_CXX(cassert VCL_CXX_HAS_HEADER_CASSERT)
CHECK_INCLUDE_FILE_CXX(ciso646 VCL_CXX_HAS_HEADER_CISO646)
...

Add for most of the other tests, all you will have to do is move
the test source code out of configure.in into a .cxx file, then do this:

 TRY_COMPILE(VCL_HAS_CXX_FEATUREONE  ${CMAKE_BINARY_DIR} 
    ${CMAKE_ROOT}/Modules/CXXFeatureOne.cxx)

CMake 1.6 also supports MACROS which make this type of thing much
easier to do.    I would not think that it would take more than a day
to convert the vcl configure script if that.   So, you would first convert
aclocal.m4 to cmake macros, and then convert configure.in to the cmakelist file
calling the macros.


-Bill


At 04:50 PM 1/8/2003 +0000, Ian Scott wrote:
>I've tested the new beta release of CMake1.6 on VXL (under Linux) and it
>appears to work fine.
>
>One item of note is that CMake 1.6 now provide TRY_COMPILE and TRY_LINK
>commands, and so it might be possible to rewrite our whole configure scripts
>using this approach. The upside is that this would the work on all platforms
>including MSVC - significantly simplifying vcl. The downside is that
>configure is 450Kbytes.
>
>Other advantages of 1.6 is a new improved Modules directory, which means we
>will be able to dump the config/cmake/Modules/NewCMake directory. The CMake
>versions should be fully compatible with our existing ones.
>
>Ian.
>
>
>
>
>-------------------------------------------------------
>This SF.NET email is sponsored by:
>SourceForge Enterprise Edition + IBM + LinuxWorld = Something 2 See!
>http://www.vasoftware.com
>_______________________________________________
>Vxl-maintainers mailing list
>Vxl...@li...
>https://lists.sourceforge.net/lists/listinfo/vxl-maintainers