[V2] Unix: static linking again

From: Jürgen Hunold (hunold_at_[hidden])
Date: 2004-11-11 08:23:22

Hi !

I've got some trouble when running
bjam gcc-3.4 release/link-runtime=static/link=static

that means building a complete static executable.
My problem is I use gcc-3.4.1 installed in /usr/local/gcc-3.4.1.
I've defined to toolset in user-config.jam to read:

using gcc : 3.4 : /usr/local/gcc-3.4.1/bin/g++ : 
<linkflags>-L/usr/local/gcc-3.4.1/lib ;

in order to get the library path correct.

Unfortunately, bjam output something like
"/usr/local/gcc-3.4.1/bin/g++"
-L"/usr/X11/lib" -L"/usr/lib" -L"/usr/local/qt-3.3.2/lib" 
-o output-file 
<list of libraries>
-static -L/usr/local/gcc-3.4.1/lib -Wl,--strip-all -pthread

that means the library path for g++ is append after the list of 
libraries and therefore meaningless. This leads to lots of linker 
errors because the correct libstdc++.a is not found.

When I manually change the command-line to read 
"/usr/local/gcc-3.4.1/bin/g++"
-L"/usr/X11/lib" -L"/usr/lib" -L"/usr/local/qt-3.3.2/lib" 
-L/usr/local/gcc-3.4.1/lib
-o output-file 
<list of libraries>
-static -Wl,--strip-all -pthread

I get a statically linked executable. Cool ;-)

I've looked at the source and found that _all_ extra toolset-options are 
simply added to OPTIONS in common.jam at line 259 which value is append 
to rest of the commandline in gcc.jam at line 263.
Inetrestingly, sun.jam does prepend the OPTION an line 91.

So, I'm not sure how to resolve this. 
The only thing I know for sure is that the custom link options in 
toolset initialisation should be inserted _before_ all other option in 
order to override them.

It is quite hard to get an example because the differences between 
gcc-3.3 (libstdc++.5) and gcc-3.4 (libstdc++.6) are quite hard to 
locate ;-))

Yours,

Jürgen

-- 
* Dipl.-Math. Jürgen Hunold ! Institut für Verkehrswesen, Eisenbahnbau
* voice: ++49 511 762-2529 ! und -betrieb, Universität Hannover  
* fax : ++49 511 762-3001 ! Appelstrasse 9a, D-30167 Hannover
* hunold_at_[hidden] ! www.ive.uni-hannover.de