Re: [Boost-build] MinGW: .lib rather than .a?

From: Edd Dawson (lists_at_[hidden])
Date: 2008-02-22 13:56:41

Vladimir Prus wrote:
> Edd Dawson wrote:

> Can you clarify? It is believed that the search rules for mingw are as
> below, and therefore .lib files should be found.
> 
>         # windows (mingw,cygwin) -Bstatic -lxxx
>         #    libxxx.a
>         #    xxx.lib
>         #
>         # windows (mingw,cygwin) -Bdynamic -lxxx
>         #    libxxx.dll.a
>         #    xxx.dll.a
>         #    libxxx.a
>         #    xxx.lib
>         #    cygxxx.dll (*)
>         #    libxxx.dll
>         #    xxx.dll
>         #    libxxx.a

P:\guff\mingw_bb>dir
  Volume in drive P has no label.
  Volume Serial Number is 9C8D-CEF7

  Directory of P:\guff\mingw_bb

22/02/2008  18:51    <DIR>          .
22/02/2008  18:51    <DIR>          ..
22/02/2008  18:38                15 main.cpp
                1 File(s)             15 bytes
                2 Dir(s)  43,348,398,080 bytes free

P:\guff\mingw_bb>dir P:\boost\boost-1_35\lib\libboost_thread*
  Volume in drive P has no label.
  Volume Serial Number is 9C8D-CEF7

  Directory of P:\boost\boost-1_35\lib

22/02/2008  17:28            81,608 libboost_thread-mgw42-mt-1_35.lib
22/02/2008  18:21           547,454 libboost_thread-mgw42-mt-sd-1_35.lib
22/02/2008  17:28            81,608 libboost_thread-mgw42-mt.lib
                3 File(s)        710,670 bytes
                0 Dir(s)  43,348,398,080 bytes free

P:\guff\mingw_bb>type main.cpp
int main() { }

P:\guff\mingw_bb>g++ -c main.cpp -o main.o

P:\guff\mingw_bb>g++ main.o -o app -LP:\boost\boost-1_35\lib 
-lboost_thread-mgw42-mt-1_35
C:\development\MinGW\4.2.1-dw2-2\bin/ld.exe: cannot find 
-lboost_thread-mgw42-mt-1_35
collect2: ld returned 1 exit status

P:\guff\mingw_bb>

I happen to be using a pre-release build of MinGW, here, but the same applies to 
the current 3.4.5 release.

If I rename the library from .lib to .a, things work fine.

Edd