Hi Vinay, On Tue, May 8, 2018 at 2:41 PM, Vinay Kumar via cfe-users <cfe-users@lists.llvm.org> wrote: (snip) > My query is how to confirm(command to check) if my executable is created > using ld.lld linker or ld.gold/some other linker? What is the default linker > 'clang++' uses(command to cross-check) on mac os? >
If you built the executable yourself, the easiest way is to run the link command again. (Delete the executable and build it again). If the tool is not immediately obvious (i.e. it doesn't say "ld" or "ld.gold" , but "clang++"), copy the link step and paste it into the command prompt and add a '-v' option. This will tell you which sub-programs your compiler is calling. For example, if your link step is $ g++ -o store_a_fn.exe store_a_fn.o run this instead: $ g++ -v -o store_a_fn.exe store_a_fn.o Using built-in specs. COLLECT_GCC=g++ COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-pc-cygwin/6.4.0/lto-wrapper.exe Target: x86_64-pc-cygwin Configured with: /cygdrive/i/szsz/tmpp/gcc/gcc-6.4.0-5.x86_64/src/gcc-6.4.0/configure --srcdir=/cygdrive/i/szsz/tmpp/gcc/gcc-6.4.0-5.x86_64/src/gcc-6.4.0 --prefix=/usr --exec-prefix=/usr --localstatedir=/var --sysconfdir=/etc --docdir=/usr/share/doc/gcc --htmldir=/usr/share/doc/gcc/html -C --build=x86_64-pc-cygwin --host=x86_64-pc-cygwin --target=x86_64-pc-cygwin --without-libiconv-prefix --without-libintl-prefix --libexecdir=/usr/lib --enable-shared --enable-shared-libgcc --enable-static --enable-version-specific-runtime-libs --enable-bootstrap --enable-__cxa_atexit --with-dwarf2 --with-tune=generic --enable-languages=ada,c,c++,fortran,lto,objc,obj-c++ --enable-graphite --enable-threads=posix --enable-libatomic --enable-libcilkrts --enable-libgomp --enable-libitm --enable-libquadmath --enable-libquadmath-support --disable-libssp --enable-libada --disable-symvers --with-gnu-ld --with-gnu-as --with-cloog-include=/usr/include/cloog-isl --without-libiconv-prefix --without-libintl-prefix --with-system-zlib --enable-linker-build-id --with-default-libstdcxx-abi=gcc4-compatible Thread model: posix gcc version 6.4.0 (GCC) COMPILER_PATH=/usr/lib/gcc/x86_64-pc-cygwin/6.4.0/:/usr/lib/gcc/x86_64-pc-cygwin/6.4.0/:/usr/lib/gcc/x86_64-pc-cygwin/:/usr/lib/gcc/x86_64-pc-cygwin/6.4.0/:/usr/lib/gcc/x86_64-pc-cygwin/:/usr/lib/gcc/x86_64-pc-cygwin/6.4.0/../../../../x86_64-pc-cygwin/bin/ LIBRARY_PATH=/usr/lib/gcc/x86_64-pc-cygwin/6.4.0/:/usr/lib/gcc/x86_64-pc-cygwin/6.4.0/../../../../x86_64-pc-cygwin/lib/../lib/:/usr/lib/gcc/x86_64-pc-cygwin/6.4.0/../../../../lib/:/lib/../lib/:/usr/lib/../lib/:/usr/lib/gcc/x86_64-pc-cygwin/6.4.0/../../../../x86_64-pc-cygwin/lib/:/usr/lib/gcc/x86_64-pc-cygwin/6.4.0/../../../:/lib/:/usr/lib/ COLLECT_GCC_OPTIONS='-v' '-o' 'store_a_fn.exe' '-shared-libgcc' '-mtune=generic' '-march=x86-64' /usr/lib/gcc/x86_64-pc-cygwin/6.4.0/collect2.exe -plugin /usr/lib/gcc/x86_64-pc-cygwin/6.4.0/cyglto_plugin.dll -plugin-opt=/usr/lib/gcc/x86_64-pc-cygwin/6.4.0/lto-wrapper.exe -plugin-opt=-fresolution=/tmp/ccWxTpxH.res -plugin-opt=-pass-through=-lgcc_s -plugin-opt=-pass-through=-lgcc -plugin-opt=-pass-through=-lcygwin -plugin-opt=-pass-through=-ladvapi32 -plugin-opt=-pass-through=-lshell32 -plugin-opt=-pass-through=-luser32 -plugin-opt=-pass-through=-lkernel32 -plugin-opt=-pass-through=-lgcc_s -plugin-opt=-pass-through=-lgcc --build-id -m i386pep --wrap _Znwm --wrap _Znam --wrap _ZdlPv --wrap _ZdaPv --wrap _ZnwmRKSt9nothrow_t --wrap _ZnamRKSt9nothrow_t --wrap _ZdlPvRKSt9nothrow_t --wrap _ZdaPvRKSt9nothrow_t -Bdynamic --dll-search-prefix=cyg --tsaware -o store_a_fn.exe /usr/lib/gcc/x86_64-pc-cygwin/6.4.0/../../../../lib/crt0.o /usr/lib/gcc/x86_64-pc-cygwin/6.4.0/crtbegin.o -L/usr/lib/gcc/x86_64-pc-cygwin/6.4.0 -L/usr/lib/gcc/x86_64-pc-cygwin/6.4.0/../../../../x86_64-pc-cygwin/lib/../lib -L/usr/lib/gcc/x86_64-pc-cygwin/6.4.0/../../../../lib -L/lib/../lib -L/usr/lib/../lib -L/usr/lib/gcc/x86_64-pc-cygwin/6.4.0/../../../../x86_64-pc-cygwin/lib -L/usr/lib/gcc/x86_64-pc-cygwin/6.4.0/../../.. store_a_fn.o -lstdc++ -lgcc_s -lgcc -lcygwin -ladvapi32 -lshell32 -luser32 -lkernel32 -lgcc_s -lgcc /usr/lib/gcc/x86_64-pc-cygwin/6.4.0/../../../../lib/default-manifest.o /usr/lib/gcc/x86_64-pc-cygwin/6.4.0/crtend.o COLLECT_GCC_OPTIONS='-v' '-o' 'store_a_fn.exe' '-shared-libgcc' '-mtune=generic' '-march=x86-64' Csaba -- You can get very substantial performance improvements by not doing the right thing. - Scott Meyers, An Effective C++11/14 Sampler So if you're looking for a completely portable, 100% standards-conformat way to get the wrong information: this is what you want. - Scott Meyers (C++TDaWYK) _______________________________________________ cfe-users mailing list cfe-users@lists.llvm.org http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-users
