Re: [Boost-users] boost builds dll's on mingw, can't use

From: Imran Akbar (imranakbar_at_[hidden])
Date: 2005-12-15 14:03:31

Thanks Merrill,
       i'm actually using scons, not make... and I didn't code that part, so
I'll have to look at it.  Is the problem not the extensions (.dll/.lib vs
.so/.a)?  Why didn't boost name them properly when I specified mingw?

Thanks,
Imran

On 12/15/05, Merrill Cornish <merrill.cornish_at_[hidden]> wrote:
>
> Imran,
>
> I've using Boost 1.33.0 with the latest MinGW on Windows XP, and it works
> fine.
>
> Could you be a bit more specific as to why MinGW "can't use" the Boost
> libraries?
> Do you mean that references are left unresolved?
>
> Here is an excerpt from the part of my my Makefile that deals with
> libraries:
>
> BOOSTLIBS = -L${boost_libs}                              \
>             -llibboost_date_time${boost_suffix}          \
>             -llibboost_filesystem${boost_suffix}         \
>             -llibboost_regex${boost_suffix}              \
>             -llibboost_serialization${boost_suffix}      \
>             -llibboost_thread${boost_suffix}             \
>             -llibboost_program_options${boost_suffix}
>
> where ${boost_libs} expands into the pathname of the directory the Boost
> libraries are in and ${boost_suffix} expands into "-mgw-mt-sd-1_33", which
> says the libraries are compiled for MinGW, multi-threaded, static, debug,
> and
> Boost version 1.33.
>
> I put ${BOOSTLIBS} as the LAST thing on the call to g++ to link my .exe
> file.  Notice that the positioning is important.
>
> The linker reads the files listed on the command line from left to right.
> When it comes to a library file, it resolves whatever outstanding
> references
> to that library it has AT THAT POINT in the scan.  If it sees another
> reference
> to that library later in the left to right scan after seeing the library,
> that later
> reference goes unresolved.
>
> The linker needs to see ALL references to library functions BEFORE it
> sees the libraries themselves. So, put the libraries last.
>
> The Boost library build process creates the libraries both with the Boost
> version suffix ("1_33" in my case) and without.  You can use either one as
> they are identical files.
>
> The idea is that if you use the library file versions WITHOUT the version
> number suffix, then you won't have to change your Makefile when a new
> version comes out.  On the other hand, if you want to explicitly tie your
> program to one and only one version of the Boost libraries, you can use
> the
> filename WITH the version numbers.
>
> Merrill
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