gcc zmqserver.c -o zmqserver `pkg-config --libs --cflags libczmq`
On Wed, 2019-11-20 at 10:23 -0600, Bill Engelke wrote: > Hello all: > > I would like to work with zmq in C, and I have hit problems trying to > compile and link the server/client example here and trying to build > any of the zguide examples here. > > Platform: Ubuntu (tried all of this using first the ARM libraries on > an Odroid, then the x86_64 libraries on a PC running Ubuntu); same > results > > I used sudo-apt-get install libczmq-dev (this is the only package I > can find available for Ubuntu) > sudo ldconfig > > I have verified that the shared library is present in > /usr/lib/x86_64-linux-gnu/ (libczmq, that is libczmq.so) > > When I use this: > > gcc zmqserver.c -o zmqserver -llibczmq -L. > > I get: > > /usr/bin/ld: cannot find -llibczmq > collect2: error: ld returned 1 exit status > > I have tried referencing the library directly: > > /usr/bin/ld: cannot find -l:/usr/lib/x86_64-linux-gnu/libczmq > collect2: error: ld returned 1 exit status > > I have tried every possible combination of the order of the link > references I can come up with, all with the same result. > > Running using the verbose flag, we get: > > gcc zmqserver.c -o zmqserver -llibczmq -L. -v > Using built-in specs. > COLLECT_GCC=gcc > COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/7/lto-wrapper > OFFLOAD_TARGET_NAMES=nvptx-none > OFFLOAD_TARGET_DEFAULT=1 > Target: x86_64-linux-gnu > Configured with: ../src/configure -v --with-pkgversion='Ubuntu 7.4.0- > 1ubuntu1~18.04.1' --with-bugurl=file:///usr/share/doc/gcc- > 7/README.Bugs --enable- > languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++ --prefix=/usr -- > with-gcc-major-version-only --program-suffix=-7 --program- > prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id -- > libexecdir=/usr/lib --without-included-gettext --enable-threads=posix > --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu > --enable-libstdcxx-debug --enable-libstdcxx-time=yes --with-default- > libstdcxx-abi=new --enable-gnu-unique-object --disable-vtable-verify > --enable-libmpx --enable-plugin --enable-default-pie --with-system- > zlib --with-target-system-zlib --enable-objc-gc=auto --enable- > multiarch --disable-werror --with-arch-32=i686 --with-abi=m64 --with- > multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic -- > enable-offload-targets=nvptx-none --without-cuda-driver --enable- > checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu -- > target=x86_64-linux-gnu > Thread model: posix > gcc version 7.4.0 (Ubuntu 7.4.0-1ubuntu1~18.04.1) > COLLECT_GCC_OPTIONS='-o' 'zmqserver' '-L.' '-v' '-mtune=generic' '- > march=x86-64' > /usr/lib/gcc/x86_64-linux-gnu/7/cc1 -quiet -v -imultiarch x86_64- > linux-gnu zmqserver.c -quiet -dumpbase zmqserver.c -mtune=generic > -march=x86-64 -auxbase zmqserver -version -fstack-protector-strong > -Wformat -Wformat-security -o /tmp/cc2R1v53.s > GNU C11 (Ubuntu 7.4.0-1ubuntu1~18.04.1) version 7.4.0 (x86_64-linux- > gnu) > compiled by GNU C version 7.4.0, GMP version 6.1.2, > MPFR version 4.0.1, MPC version 1.1.0, isl version isl-0.19-GMP > GGC heuristics: --param ggc-min-expand=100 --param ggc-min- > heapsize=131072 > ignoring nonexistent directory "/usr/local/include/x86_64-linux-gnu" > ignoring nonexistent directory "/usr/lib/gcc/x86_64-linux- > gnu/7/../../../../x86_64-linux-gnu/include" > #include "..." search starts here: > #include <...> search starts here: > /usr/lib/gcc/x86_64-linux-gnu/7/include > /usr/local/include > /usr/lib/gcc/x86_64-linux-gnu/7/include-fixed > /usr/include/x86_64-linux-gnu > /usr/include > End of search list. > GNU C11 (Ubuntu 7.4.0-1ubuntu1~18.04.1) version 7.4.0 (x86_64-linux- > gnu) > compiled by GNU C version 7.4.0, GMP version 6.1.2, > MPFR version 4.0.1, MPC version 1.1.0, isl version isl-0.19-GMP > > GGC heuristics: --param ggc-min-expand=100 --param ggc-min- > heapsize=131072 > Compiler executable checksum: fa57db1fe2d756b22d454aa8428fd3bd > COLLECT_GCC_OPTIONS='-o' 'zmqserver' '-L.' '-v' '-mtune=generic' '- > march=x86-64' > as -v --64 -o /tmp/ccKlQGoW.o /tmp/cc2R1v53.s > GNU assembler version 2.30 (x86_64-linux-gnu) using BFD version (GNU > Binutils for Ubuntu) 2.30 > COMPILER_PATH=/usr/lib/gcc/x86_64-linux-gnu/7/:/usr/lib/gcc/x86_64- > linux-gnu/7/:/usr/lib/gcc/x86_64-linux-gnu/:/usr/lib/gcc/x86_64- > linux-gnu/7/:/usr/lib/gcc/x86_64-linux-gnu/ > LIBRARY_PATH=/usr/lib/gcc/x86_64-linux-gnu/7/:/usr/lib/gcc/x86_64- > linux-gnu/7/../../../x86_64-linux-gnu/:/usr/lib/gcc/x86_64-linux- > gnu/7/../../../../lib/:/lib/x86_64-linux- > gnu/:/lib/../lib/:/usr/lib/x86_64-linux- > gnu/:/usr/lib/../lib/:/usr/lib/gcc/x86_64-linux- > gnu/7/../../../:/lib/:/usr/lib/ > COLLECT_GCC_OPTIONS='-o' 'zmqserver' '-L.' '-v' '-mtune=generic' '- > march=x86-64' > /usr/lib/gcc/x86_64-linux-gnu/7/collect2 -plugin /usr/lib/gcc/x86_64- > linux-gnu/7/liblto_plugin.so -plugin-opt=/usr/lib/gcc/x86_64-linux- > gnu/7/lto-wrapper -plugin-opt=-fresolution=/tmp/ccOSG0IO.res -plugin- > opt=-pass-through=-lgcc -plugin-opt=-pass-through=-lgcc_s -plugin- > opt=-pass-through=-lc -plugin-opt=-pass-through=-lgcc -plugin-opt=- > pass-through=-lgcc_s --sysroot=/ --build-id --eh-frame-hdr -m > elf_x86_64 --hash-style=gnu --as-needed -dynamic-linker /lib64/ld- > linux-x86-64.so.2 -pie -z now -z relro -o zmqserver > /usr/lib/gcc/x86_64-linux-gnu/7/../../../x86_64-linux-gnu/Scrt1.o > /usr/lib/gcc/x86_64-linux-gnu/7/../../../x86_64-linux-gnu/crti.o > /usr/lib/gcc/x86_64-linux-gnu/7/crtbeginS.o -L. > -L/usr/lib/gcc/x86_64-linux-gnu/7 -L/usr/lib/gcc/x86_64-linux- > gnu/7/../../../x86_64-linux-gnu -L/usr/lib/gcc/x86_64-linux- > gnu/7/../../../../lib -L/lib/x86_64-linux-gnu -L/lib/../lib > -L/usr/lib/x86_64-linux-gnu -L/usr/lib/../lib -L/usr/lib/gcc/x86_64- > linux-gnu/7/../../.. /tmp/ccKlQGoW.o -llibczmq -lgcc --push-state -- > as-needed -lgcc_s --pop-state -lc -lgcc --push-state --as-needed > -lgcc_s --pop-state /usr/lib/gcc/x86_64-linux-gnu/7/crtendS.o > /usr/lib/gcc/x86_64-linux-gnu/7/../../../x86_64-linux-gnu/crtn.o > /usr/bin/ld: cannot find -llibczmq > collect2: error: ld returned 1 exit status > > > > > Trying to build the zguide examples shows that something is missing > or misconfigured for that as well: (using library cloned from > https://github.com/booksbyus/zguide) > > ./build hwserver > hwserver > /usr/bin/ld: cannot find -luuid > collect2: error: ld returned 1 exit status > > > > I have looked thru online discussion groups to the point of > exhaustion; some possible ideas here and here, but still no luck. > > What am I missing? -B.E. > > > > > > > _______________________________________________ > zeromq-dev mailing list > [email protected] > > https://lists.zeromq.org/mailman/listinfo/zeromq-dev > > -- Kind regards, Luca Boccassi
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