Hi Kewen, Thanks very much for your quick response! Yes, after adding "-static-libasan", the compilation is successful! But I checked the output of "gcc -v", there is no "--disable-libsanitizer": $ gcc -v Using built-in specs. COLLECT_GCC=gcc COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-unknown-linux-gnu/9.2.0/lto-wrapper Target: x86_64-unknown-linux-gnu Configured with: /builddir/gcc-9.2.0/configure --build=x86_64-unknown-linux-gnu --enable-fast-character --enable-vtable-verify --prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info --libexecdir=/usr/lib --libdir=/usr/lib --enable-threads=posix --enable-__cxa_atexit --disable-multilib --with-system-zlib --enable-shared --enable-lto --enable-plugins --enable-linker-build-id --disable-werror --disable-nls --enable-default-pie --enable-default-ssp --enable-checking=release --disable-libstdcxx-pch --with-isl --with-linker-hash-style=gnu --disable-libunwind-exceptions --disable-target-libiberty --enable-serial-configure --enable-languages=c,c++,objc,obj-c++,fortran,lto,go,ada Thread model: posix gcc version 9.2.0 (GCC) Thanks! Best Regards Nan Xiao On Thu, Dec 26, 2019 at 6:01 PM Kewen.Lin <linkw@xxxxxxxxxxxxx> wrote: > > Hi Nan, > > on 2019/12/26 下午4:48, Nan Xiao wrote: > > Hi gcc community, > > > > Greetings from me! > > > > I am using Void Linux, and want to use sanitizers. Using clang to > > compile code, it is OK: > > > > $ clang -std=c11 -fsanitize=address test.c > > $ > > > > While gcc reports following errors: > > > > $ gcc -std=c11 -fsanitize=address test.c > > /usr/bin/ld: cannot find libasan_preinit.o: No such file or directory > > /usr/bin/ld: cannot find -lasan > > collect2: error: ld returned 1 exit status > > > > May I suggest you checking your gcc whether disabled libsanitizer support? > GCC configuration allows you to build one gcc without libsanitizer support > with --disable-libsanitizer. "gcc -v" can show the configuration options. > > > > I check the program compiled with clang: > > > > $ ldd a.out > > linux-vdso.so.1 (0x00007fffd858a000) > > libpthread.so.0 => /usr/lib/libpthread.so.0 (0x00007fc1659b8000) > > librt.so.1 => /usr/lib/librt.so.1 (0x00007fc1659ad000) > > libm.so.6 => /usr/lib/libm.so.6 (0x00007fc165868000) > > libdl.so.2 => /usr/lib/libdl.so.2 (0x00007fc165863000) > > libgcc_s.so.1 => /usr/lib/libgcc_s.so.1 (0x00007fc165849000) > > libc.so.6 => /usr/lib/libc.so.6 (0x00007fc165686000) > > /lib64/ld-linux-x86-64.so.2 => /lib/ld-linux-x86-64.so.2 (0x00007fc1659e0000) > > > > See https://github.com/google/sanitizers/wiki/AddressSanitizerAsDso > I guess your clang was configured as static asan library by default. > So it's linked with static library, you can't find libasan.so with ldd. > > > No asan library is required. > > > > It requires static library. By the way, for gcc you can link with static library > via gcc option -static-libasan. > > > BR, > Kewen >
