On Apr 25, 2005, at 11:59 AM, Karl Berry wrote:
Greetings,
In gcc-4.0.0 (and all previous releases), the C++ shared libraries (for
example) are not found without adding specific link flags. For example,
compiling a C++ hello,world (source below, not that it matters):
$ which g++ g++ is /usr/local/gnu/bin/g++ $ g++ hello.cc $ ldd a.out libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0x00599000) libm.so.6 => /lib/libm.so.6 (0xb7fbf000) libgcc_s.so.1 => /lib/libgcc_s.so.1 (0x004f2000) libc.so.6 => /lib/libc.so.6 (0xb7e95000) /lib/ld-linux.so.2 (0x00162000)
Even though I compiled with /usr/local/gnu/bin/g++, the linker found the
stdc++ and gcc_s libraries in /usr/lib and /lib. The resulting silent
mismatch between compiler and libraries can only cause grief for those
unaware. To get the right thing, I have to resort to:
$ g++ -L/usr/local/gnu/lib -Wl,-R/usr/local/gnu/lib hello.cc
-Wl,-R is bad, I repeat bad.
Set LD_LIBRARY_PATH as directed on the libstdc++ installation instructions:
http://gcc.gnu.org/onlinedocs/libstdc++/install.html
-- Pinski
