[Bug libstdc++/5291] Bad reference to build directory in libstdc++.la

["peb at mppmu dot mpg dot de" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #18 from peb at mppmu dot mpg dot de  2007-02-22 08:58 -------
I have tried to analyze the cause of the -L flags passed to libtool when
linking libsupc++ and libstdc++ and found these two:

(1) explicit flags in the top-level RAW_CXX_FOR_TARGET passed as CXX to the
libstdc++ and libjava modules, and

(2) flags implicitly added by the GCC-modified "libtool --tag CXX --mode=link"
for all directories in the compiler search path. This part is easily corrected
by instead using "--tag CC" when linking libraries.

I'd like to try to fix all this, but in order to do so I need some additional
info. As far as I can see there are in principle three ways to build libstdc++:

(A) as part of building GCC (with language c++),

(B) independently with a prebuilt g++, or

(C) independently with a non-GCC compiler.

I think there is an obvious way to handle issue (1) above in case (A), but
cases (B) and in particular (C) may pose additional problems.

Question: are the possibilities (B) and (C) still viable?


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=5291