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Trouble linking c++ programs

From: Matthew Wilcox
Subject: Trouble linking c++ programs
Date: Fri, 16 Nov 2001 18:44:12 +0000
User-agent: Mutt/1.2.5i

when trying the final link step, libtool always uses the C compiler, even
if the C++ compiler was specified on the command line.  This is a problem
with gcc 2.96 and later since libstdc++ gets included if you link with g++
but not if you link with gcc.  Here's an example from libdb3:

address@hidden:~/debian/db3/db3-3.2.9/build-tree/db-3.2.9/build_unix$ /bin/sh 
./libtool --mode=link c++ -version-info 3:2 -rpath /usr/lib -o libdb3_cxx.la 
cxx_app.lo cxx_except.lo cxx_lock.lo cxx_log.lo cxx_mpool.lo cxx_table.lo 
cxx_txn.lo 2>libtool.out
rm -fr .libs/libdb3_cxx.la .libs/libdb3_cxx.* .libs/libdb3_cxx.*
gcc -shared  cxx_app.lo cxx_except.lo cxx_lock.lo cxx_log.lo cxx_mpool.lo 
cxx_table.lo cxx_txn.lo   -Wl,-soname -Wl,libdb3_cxx.so.3 -o 

this works on my machine because i only have gcc 2.95 installed, but it fails
with 2.96/3.0.  the command used to link is:

archive_cmds="\$CC -shared \$libobjs \$deplibs \$compiler_flags \${wl}-soname 
\$wl\$soname -o \$lib"

so either we should set CC from $nonopt or change the archive_cmds string.
Here's a diff for the first option:

--- /usr/share/libtool/ltmain.sh        Sat Sep 22 18:10:52 2001
+++ ltmain.sh   Fri Nov 16 11:42:43 2001
@@ -744,6 +744,7 @@
+    CC="$nonopt"

this fixes the problem, but i find this shell script very difficult to
understand, so i'm not aware of all the ramifications this might have.

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