https://gcc.gnu.org/bugzilla/show_bug.cgi?id=35179
--- Comment #8 from Eric Gallager <egallager at gcc dot gnu.org> --- (In reply to Eric Gallager from comment #7) > (In reply to Radu Hociung from comment #6) > > Comment on attachment 17939 [details] > > Improved hello-test case showing working and failing command lines, with > > Makefile > > > > Works as expected: > > gcc -g -o hello-exec hellomain.o -L. -lhello > > > > Triggers the bug: > > gcc -g -static -o hello-exec-gccbug35179 hellomain.o -shared -L. -lhello -v > > Testcase fails to link for me on Darwin due to a difference in linkers: > > $ make hello-exec-gccbug35179 > /usr/local/bin/gcc -o hellomain.o -c -g hellomain.c > hellomain.c: In function ‘main’: > hellomain.c:9:2: warning: implicit declaration of function ‘exit’ > [-Wimplicit-function-declaration] > exit(0); > ^~~~ > hellomain.c:9:2: warning: incompatible implicit declaration of built-in > function ‘exit’ > hellomain.c:9:2: note: include ‘<stdlib.h>’ or provide a declaration of > ‘exit’ > /usr/local/bin/gcc -o hello_.o -g -c -fpic -DPIC hello.c > /usr/local/bin/gcc -o libhello.so -shared -g hello_.o > echo Linking with both -static and -shared flags exposes the bug. > Linking with both -static and -shared flags exposes the bug. > /usr/local/bin/gcc -g -static -o hello-exec-gccbug35179 hellomain.o -shared > -L. -lhello -v > Using built-in specs. > COLLECT_GCC=/usr/local/bin/gcc > COLLECT_LTO_WRAPPER=/usr/local/libexec/gcc/i386-apple-darwin9.8.0/8.0.0/lto- > wrapper > Target: i386-apple-darwin9.8.0 > Configured with: ../configure --disable-werror --disable-werror-always > --enable-languages=c,c++,lto,objc,obj-c++ > --enable-stage1-checking=release,rtl -C --with-system-libunwind > --enable-secureplt --enable-frame-pointer --enable-debug --with-isl > --disable-host-shared --enable-maintainer-mode --disable-default-pie > --with-ld64 --without-pic --enable-target-optspace CC=/usr/local/bin/gcc > CXX=/usr/local/bin/g++ AUTOCONF=/usr/local/bin/autoconf > AUTOHEADER=/usr/local/bin/autoheader AUTORECONF=/usr/local/bin/autoreconf > AUTOM4TE=/usr/local/bin/autom4te AUTOSCAN=/usr/local/bin/autoscan > AUTOUPDATE=/usr/local/bin/autoupdate IFNAMES=/usr/local/bin/ifnames > Thread model: posix > gcc version 8.0.0 20170702 (experimental) (GCC) > COMPILER_PATH=/usr/local/libexec/gcc/i386-apple-darwin9.8.0/8.0.0/:/usr/ > local/libexec/gcc/i386-apple-darwin9.8.0/8.0.0/:/usr/local/libexec/gcc/i386- > apple-darwin9.8.0/:/usr/local/lib/gcc/i386-apple-darwin9.8.0/8.0.0/:/usr/ > local/lib/gcc/i386-apple-darwin9.8.0/ > LIBRARY_PATH=/usr/local/lib/gcc/i386-apple-darwin9.8.0/8.0.0/:/usr/local/lib/ > gcc/i386-apple-darwin9.8.0/8.0.0/../../../ > COLLECT_GCC_OPTIONS='-g' '-static' '-o' 'hello-exec-gccbug35179' '-L.' '-v' > '-mmacosx-version-min=10.5.8' '-asm_macosx_version_min=10.5' '-mtune=core2' > '-Zdynamiclib' > /usr/local/libexec/gcc/i386-apple-darwin9.8.0/8.0.0/collect2 -static -dylib > -arch i386 -macosx_version_min 10.5.8 -weak_reference_mismatches non-weak -o > hello-exec-gccbug35179 -ldylib1.10.5.o -L. > -L/usr/local/lib/gcc/i386-apple-darwin9.8.0/8.0.0 > -L/usr/local/lib/gcc/i386-apple-darwin9.8.0/8.0.0/../../.. hellomain.o > -lhello -lgcc_eh -lgcc -v -idsym > collect2 version 8.0.0 20170702 (experimental) > /usr/bin/ld -static -dylib -arch i386 -macosx_version_min 10.5.8 > -weak_reference_mismatches non-weak -o hello-exec-gccbug35179 > -ldylib1.10.5.o -L. -L/usr/local/lib/gcc/i386-apple-darwin9.8.0/8.0.0 > -L/usr/local/lib/gcc/i386-apple-darwin9.8.0/8.0.0/../../.. hellomain.o > -lhello -lgcc_eh -lgcc -v > Apple Computer, Inc. version cctools-698.1~1 > ld_classic: incompatible flag -dylib used (must specify "-dynamic" to be > used) > collect2: error: ld returned 1 exit status > make: *** [hello-exec-gccbug35179] Error 1 > $ > > Someone running GNU/Linux will have to try the testcase to move this out of > WAITING. Now that I have access to the GCC compile farm, the testcase still fails on me when I try it there: egallager@gcc12:~/hello-test$ make hello-exec-gccbug35179 /opt/cfarm/gcc-latest/bin/gcc -o hellomain.o -c -g hellomain.c hellomain.c: In function 'main': hellomain.c:9:2: warning: implicit declaration of function 'exit' [-Wimplicit-function-declaration] exit(0); ^~~~ hellomain.c:9:2: warning: incompatible implicit declaration of built-in function 'exit' hellomain.c:9:2: note: include '<stdlib.h>' or provide a declaration of 'exit' /opt/cfarm/gcc-latest/bin/gcc -o hello_.o -g -c -fpic -DPIC hello.c /opt/cfarm/gcc-latest/bin/gcc -o libhello.so -shared -g hello_.o echo Linking with both -static and -shared flags exposes the bug. Linking with both -static and -shared flags exposes the bug. /opt/cfarm/gcc-latest/bin/gcc -g -static -o hello-exec-gccbug35179 hellomain.o -shared -L. -lhello -v Using built-in specs. COLLECT_GCC=/opt/cfarm/gcc-latest/bin/gcc COLLECT_LTO_WRAPPER=/home/iulius/autobuild/bin/gcc-7.1.0/libexec/gcc/x86_64-pc-linux-gnu/7.1.0/lto-wrapper Target: x86_64-pc-linux-gnu Configured with: ../gcc-7.1.0-src/configure --prefix=/home/iulius/autobuild/bin/gcc-7.1.0 --with-gmp=/home/iulius/autobuild/bin/gmp-6.1.2 --with-mpfr=/home/iulius/autobuild/bin/mpfr-3.1.5 --with-mpc=/home/iulius/autobuild/bin/mpc-1.0.3 --disable-nls --enable-threads=posix --disable-multilib --enable-languages=c,c++ Thread model: posix gcc version 7.1.0 (GCC) COMPILER_PATH=/home/iulius/autobuild/bin/gcc-7.1.0/libexec/gcc/x86_64-pc-linux-gnu/7.1.0/:/home/iulius/autobuild/bin/gcc-7.1.0/libexec/gcc/x86_64-pc-linux-gnu/7.1.0/:/home/iulius/autobuild/bin/gcc-7.1.0/libexec/gcc/x86_64-pc-linux-gnu/:/home/iulius/autobuild/bin/gcc-7.1.0/lib/gcc/x86_64-pc-linux-gnu/7.1.0/:/home/iulius/autobuild/bin/gcc-7.1.0/lib/gcc/x86_64-pc-linux-gnu/ LIBRARY_PATH=/home/iulius/autobuild/bin/gcc-7.1.0/lib/gcc/x86_64-pc-linux-gnu/7.1.0/:/home/iulius/autobuild/bin/gcc-7.1.0/lib/gcc/x86_64-pc-linux-gnu/7.1.0/../../../../lib64/:/lib/../lib64/:/usr/lib/../lib64/:/home/iulius/autobuild/bin/gcc-7.1.0/lib/gcc/x86_64-pc-linux-gnu/7.1.0/../../../:/lib/:/usr/lib/ COLLECT_GCC_OPTIONS='-g' '-static' '-o' 'hello-exec-gccbug35179' '-shared' '-L.' '-v' '-mtune=generic' '-march=x86-64' /home/iulius/autobuild/bin/gcc-7.1.0/libexec/gcc/x86_64-pc-linux-gnu/7.1.0/collect2 -m elf_x86_64 -shared -o hello-exec-gccbug35179 /usr/lib/../lib64/crti.o /home/iulius/autobuild/bin/gcc-7.1.0/lib/gcc/x86_64-pc-linux-gnu/7.1.0/crtbeginT.o -L. -L/home/iulius/autobuild/bin/gcc-7.1.0/lib/gcc/x86_64-pc-linux-gnu/7.1.0 -L/home/iulius/autobuild/bin/gcc-7.1.0/lib/gcc/x86_64-pc-linux-gnu/7.1.0/../../../../lib64 -L/lib/../lib64 -L/usr/lib/../lib64 -L/home/iulius/autobuild/bin/gcc-7.1.0/lib/gcc/x86_64-pc-linux-gnu/7.1.0/../../.. hellomain.o -lhello --start-group -lgcc -lgcc_eh -lc --end-group /home/iulius/autobuild/bin/gcc-7.1.0/lib/gcc/x86_64-pc-linux-gnu/7.1.0/crtendS.o /usr/lib/../lib64/crtn.o /usr/bin/ld: /home/iulius/autobuild/bin/gcc-7.1.0/lib/gcc/x86_64-pc-linux-gnu/7.1.0/crtbeginT.o: relocation R_X86_64_32 against `__TMC_END__' can not be used when making a shared object; recompile with -fPIC /home/iulius/autobuild/bin/gcc-7.1.0/lib/gcc/x86_64-pc-linux-gnu/7.1.0/crtbeginT.o: could not read symbols: Bad value collect2: error: ld returned 1 exit status make: *** [hello-exec-gccbug35179] Error 1 egallager@gcc12:~/hello-test$
