Re: [Boost-build] RE [cygwin] How to use both gcc 3.x.x and gcc 4.x.x

Subject: Re: [Boost-build] RE [cygwin] How to use both gcc 3.x.x and gcc 4.x.x
From: Robert Ramey (ramey_at_[hidden])
Date: 2009-03-14 14:27:40

I've got gcc 4.3.2 on my cygwin system and want to use boost build with it.

when I use --toolset=gcc

my stystem uses gcc 3.4.4 which I also have

when I use --toolset=gcc-4.3.2 or --toolset=gcc-4,
I get a message at the top of the bjam.log which says

'g++' is not recognized as an internal or external command,
operable program or batch file.
'g++' is not recognized as an internal or external command,

I can invoke g++-4 from my shell:

$ g++-4 -v
Using built-in specs.
Target: i686-pc-cygwin
Configured with: 
/gnu/gcc/release/gcc4-4.3.2-1/src/gcc-4.3.2/configure --srcdir=
/gnu/gcc/release/gcc4-4.3.2-1/src/gcc-4.3.2 --prefix=/usr --exec-prefix=/usr 
 --b
indir=/usr/bin --sbindir=/usr/sbin --libexecdir=/usr/sbin --localstatedir=/var 
 -
-sysconfdir=/etc --datadir=/usr/share --infodir=/usr/share/info --mandir=/usr/sh
are/man -v --with-gmp=/usr --with-mpfr=/usr --enable-bootstrap --enable-version-
specific-runtime-libs --with-slibdir=/usr/bin --libexecdir=/usr/lib --enable-sta
tic --enable-shared --enable-shared-libgcc --enable-__cxa_atexit --with-gnu-ld 
 -
-with-gnu-as --with-dwarf2 --disable-sjlj-exceptions --enable-languages=ada,c,c+
+,fortran,java,objc,obj-c++ --disable-symvers --enable-libjava --program-suffix=
-4
Thread model: single
gcc version 4.3.2 20080827 (alpha-testing) 1 (GCC)
$

my user-config.jam looks like:

# Boost.Build Configuration
# Automatically generated by Boost configure
# Compiler configuration
using msvc ;
using borland ;
using gcc ;
using gcc : 4 : g++-4 ;
using como-win ;
using stlport ;
# Python configuration
using python : 2.5 : /usr ;

What do I have to do to use gcc 4.3.2 with my boost build system?

Robert Ramey

frederic.bron_at_[hidden] wrote:
>> Cygwin ships both GCC's 3.x.x and 4.x.x series of compilers. You
>> have to separately install both with the Cygwin installer. The 4.x.x
>> series is named "gcc4-core" and "gcc4-c++", and they appear lower
>> down in the list of packages so are easy to miss.
>>
>> To use both with Boost.Build, your user-config.jam file needs to
>> include:
>>
>>      using gcc ;
>>      using gcc : 4 : g++-4 ;
>>
>
> I am using the following:
> using gcc : cygwin_3.4.4 : /usr/bin/g++ :
> <compileflags>-DBOOST_POSIX_API <compileflags>-DBOOST_POSIX_PATH ;
> using gcc : cygwin_4.3.2 : /usr/bin/g++-4 :
> <compileflags>-DBOOST_POSIX_API <compileflags>-DBOOST_POSIX_PATH ;
>
> and I try to run the regression tests regularly (bronf1 on trunk).
> However, I do not know if it is of any help.
>
> F. Bron
>
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