Hi All, I have installed on my system two different versions of GCC. I am finding that while compiling + linking an autotools based example project using the "new" GCC version, it seems to compile using the headers for libstdc++ (new version) but tries to link with the libstdc++ (old version). See end for example linker command line that looks correct to me... The two versions of GCC are: One that comes with NetBSD: Version: 3.3.3 Prefix: /usr And one i have been modifying as part of a C++ exception source analysis tool i am writing: Version: 4.0.1 (patched with my modifications) Prefix: /home/bcosta/build/install/edoc_gcc Now the problem i have is that i get undefined symbols while linking when i compile trying to use the modified GCC. The undefined symbols belong to libstdc++ and exist in the 4.0.1 GCC version of libstdc++ but those symbols do NOT exist in the 3.3.3 GCC version of libstdc++ So for some reason i assume it is linking using the /usr/lib/libstdc++.so file instead of the /home/bcosta/build/install/edoc_gcc/lib/libstdc++.so In order to setup my environment to use the modified GCC (4.0.1) i do the following: export LD_LIBRARY_PATH="/home/bcosta/build/install/edoc_gcc/lib:$LD_LIBRARY_PATH" export PATH="/home/bcosta/build/install/edoc_gcc/bin:$PATH" Is there something else i should be doing in order to set my build environment to use the new GCC version (without un-installing the old one)? Thanks, Brendon. The link errors i get look like: rm -f .libs/library_user.nm .libs/library_user.nmS .libs/library_user.nmT creating .libs/library_userS.c extracting global C symbols from `../../../src/plugins/myplugin/.libs/myplugin.a' extracting global C symbols from `/home/bcosta/build/example/src/libs/mystatic/.libs/libmystatic.a' extracting global C symbols from `/home/bcosta/build/install/edoc_gcc/lib/libstdc++.a' (cd .libs && gcc -c -fno-builtin "library_userS.c") rm -f .libs/library_userS.c .libs/library_user.nm .libs/library_user.nmS .libs/library_user.nmT g++ -g -O2 -o .libs/library_user library_user-main.o .libs/library_userS.o -L/home/bcosta/build/edoc/gcc-4.0.1/i386-unknown-netbsdelf3.0/libstdc++-v3/src -L/home/bcosta/build/edoc/gcc-4.0.1/i386-unknown-netbsdelf3.0/libstdc++-v3/src/.libs -L/home/bcosta/build/edoc/gcc-4.0.1/gcc ../../../src/plugins/myplugin/.libs/myplugin.a /home/bcosta/build/example/src/libs/mystatic/.libs/libmystatic.a -lm ../../../src/libs/myshared/.libs/libmyshared.so ../../../src/libs/mystatic/.libs/libmystatic.a /home/bcosta/build/install/edoc_gcc/lib/libstdc++.so ../../../libltdl/.libs/libltdlc.a -Wl,--rpath -Wl,/home/bcosta/build/install_example/lib -Wl,--rpath -Wl,/home/bcosta/build/install/edoc_gcc/lib .libs/library_userS.o(.rodata+0x8414): undefined reference to `__gnu_internal::palloc_init_mutex' .libs/library_userS.o(.rodata+0x841c): undefined reference to `__gnu_cxx::__pool_alloc_base::_S_end_free' .libs/library_userS.o(.rodata+0x842c): undefined reference to `__gnu_cxx::__pool_alloc_base::_S_free_list' .libs/library_userS.o(.rodata+0x8434): undefined reference to `__gnu_cxx::__pool_alloc_base::_S_heap_size' .libs/library_userS.o(.rodata+0x843c): undefined reference to `__gnu_cxx::__pool_alloc_base::_S_start_free' .libs/library_userS.o(.rodata+0x844c): undefined reference to `__gnu_cxx::__pool_alloc_base::_M_allocate_chunk(unsigned int, int&)' ...
