Re: [Boost-build] Future development

From: Larry Evans (cppljevans_at_[hidden])
Date: 2007-10-12 19:26:55

On 10/12/07 15:33, Larry Evans wrote:
[snip]
>  > 2. You want to pass flags to the compiler like -E, but cmake does not
>  > allow this.
> 
> I didn't mean this.  The mention of using -E was only meant to show I
> used it to debug c++ macros, and that a similar feature would be
> useful w.r.t. cmake macros.  Sorry I wasn't clear.  However, I tested
> this, and indeed you're right.  I tried:
> 
> #!/bin/bash
> cmake -DCMAKE_CXX_COMPILER=/home/evansl/download/gcc/\
> 4.3-20071005/install/bin/g++\
>    -std=gnu++0x\
>    -I/home/evansl/prog_dev/boost-cvs/ro/boost/sandbox/variadic-templates\
>    ../../src
> 
> and the resulting CMakeCache.txt didn't have the -std or the -I flags:
> 
> //CXX compiler.
> CMAKE_CXX_COMPILER:FILEPATH=/home/evansl/download/gcc/4.3-20071005/install/bin/g++
> 
> This is needed in order to test the variadic compiler.  The -std flag
> signals variadic templates and the -I is to include my variadic boost
> directory ahead of the normal boost directory.  So, unless there's a
> workaround, I think this is a definite negative on cmake's side of the
> comparison with BB.  
[snip]
There is a workaround.  Running the attached bash shell file with no 
CMakeCache.txt file present, results in a new CMakeCache.txt with:

//CXX compiler.
CMAKE_CXX_COMPILER:FILEPATH=/home/evansl/download/gcc/4.3-20071005/install/bin/g++

//First argument to CXX compiler
CMAKE_CXX_COMPILER_ARG1:STRING= -std=gnu++0x 
-I/home/evansl/prog_dev/boost-cvs/ro/boost/sandbox/variadic-templates