On Wed, May 29, 2024 at 8:47 AM Sad Clouds via Gcc <gcc@gcc.gnu.org> wrote: > > Hello, I'm noticing some issues with libstdc++ after building GCC from > sources and installing into /opt/gcc-14.1.0. Specifically: > > $ objdump -x /opt/gcc-14.1.0/lib/libstdc++.so.6 | grep RUNPATH > > $ ldd /opt/gcc-14.1.0/lib/libstdc++.so.6 > /opt/gcc-14.1.0/lib/libstdc++.so.6: > libm.so.5 => /lib/libm.so.5 (0x5486f1dc8000) > libc.so.7 => /lib/libc.so.7 (0x5486f07e5000) > libgcc_s.so.1 => /lib/libgcc_s.so.1 (0x5486f1ff0000) > > As you can see libstdc++ depends on libgcc_s but libstdc++ is missing > RUNPATH, so it picks up whatever is found in /lib rather than in target > install directory /opt/gcc-14.1.0 > > Contrast this with: > > $ objdump -x /opt/gcc-14.1.0/lib/libcc1.so.0 | grep RUNPATH > RUNPATH /opt/gcc-14.1.0/lib > > $ ldd /opt/gcc-14.1.0/lib/libcc1.so.0 > /opt/gcc-14.1.0/lib/libcc1.so.0: > libstdc++.so.6 => /opt/gcc-14.1.0/lib/libstdc++.so.6 (0x59c328800000) > libm.so.5 => /lib/libm.so.5 (0x59c325081000) > libc.so.7 => /lib/libc.so.7 (0x59c3245c4000) > libgcc_s.so.1 => /opt/gcc-14.1.0/lib/libgcc_s.so.1 (0x59c326ac0000) > > Is it intentional or is it a bug? What is the best way to add RUNPATH > to libstd++? Do I modify CFLAGS_FOR_TARGET or LDFLAGS_FOR_TARGET?
If you build an executable to pick up libstdc++ via a RUNPATH that apps RUNPATH should apply to libgcc as well. If you use LD_LIBRARY_PATH the story is the same. So what's your actual failure mode? > PS. GCC was configured with these options: > > $ /opt/gcc-14.1.0/bin/gcc -v > Using built-in specs. > COLLECT_GCC=/opt/gcc-14.1.0/bin/gcc > COLLECT_LTO_WRAPPER=/opt/gcc-14.1.0/libexec/gcc/aarch64-unknown-freebsd14.0/14.1.0/lto-wrapper > Target: aarch64-unknown-freebsd14.0 > Configured with: ../../src/gcc-14.1.0/configure --prefix=/opt/gcc-14.1.0 > --build=aarch64-unknown-freebsd14.0 --host=aarch64-unknown-freebsd14.0 > --target=aarch64-unknown-freebsd14.0 --enable-languages=c,c++,ada > --enable-shared --enable-threads=posix --enable-bootstrap --disable-multilib > --disable-nls --with-as=/opt/gcc-14.1.0/bin/as > --with-ld=/opt/gcc-14.1.0/bin/ld > Thread model: posix > Supported LTO compression algorithms: zlib > gcc version 14.1.0 (GCC)
