i'm trying compiling simple socket code uses ssl. have installed latest version of openssl on ubuntu 14.+ version of os. when try compile using below command
gcc -o sslconnect testsslconnect.c -l/usr/local/lib -lssl -lcrypto i following error.
/tmp/ccro7jy9.o: in function `main': testsslconnect.c:(.text+0x66): undefined reference `openssl_add_all_algorithms_noconf' testsslconnect.c:(.text+0x70): undefined reference `err_load_crypto_strings' testsslconnect.c:(.text+0x75): undefined reference `ssl_load_error_strings' testsslconnect.c:(.text+0xa3): undefined reference `ssl_library_init' testsslconnect.c:(.text+0xc2): undefined reference `sslv23_client_method' collect2: error: ld returned 1 exit status i think looks linker problem i'm unable figure out. appreciate on this
below message see when run gcc -v option
using built-in specs. collect_gcc=gcc collect_lto_wrapper=/usr/lib/gcc/x86_64-linux-gnu/4.8/lto-wrapper target: x86_64-linux-gnu configured with: ../src/configure -v --with-pkgversion='ubuntu 4.8.2-19ubuntu1' --with-bugurl=file:///usr/share/doc/gcc-4.8/readme.bugs --enable-languages=c,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr --program-suffix=-4.8 --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.8 --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-gnu-unique-object --disable-libmudflap --enable-plugin --with-system-zlib --disable-browser-plugin --enable-java-awt=gtk --enable-gtk-cairo --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-4.8-amd64/jre --enable-java-home --with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-4.8-amd64 --with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-4.8-amd64 --with-arch-directory=amd64 --with-ecj-jar=/usr/share/java/eclipse-ecj.jar --enable-objc-gc --enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64,mx32 --with-tune=generic --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu thread model: posix gcc version 4.8.2 (ubuntu 4.8.2-19ubuntu1) collect_gcc_options='-v' '-l/usr/local/lib' '-o' 'sslconnect' '-mtune=generic' '-march=x86-64' /usr/lib/gcc/x86_64-linux-gnu/4.8/cc1 -quiet -v -imultiarch x86_64-linux-gnu ssl_client.c -quiet -dumpbase ssl_client.c -mtune=generic -march=x86-64 -auxbase ssl_client -version -fstack-protector -wformat -wformat-security -o /tmp/ccvabqoe.s gnu c (ubuntu 4.8.2-19ubuntu1) version 4.8.2 (x86_64-linux-gnu) compiled gnu c version 4.8.2, gmp version 5.1.3, mpfr version 3.1.2-p3, mpc version 1.0.1 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/4.8/../../../../x86_64-linux-gnu/include" #include "..." search starts here: #include <...> search starts here: /home/firmwaredev/dev/yocto/build_etn-cgtqmx6/tmp/sysroots/x86_64-linux/usr/include/ /home/firmwaredev/dev/yocto/build_etn-cgtqmx6/tmp/sysroots/x86_64-linux/usr/include/openssl/ . /usr/lib/gcc/x86_64-linux-gnu/4.8/include /usr/local/include /usr/lib/gcc/x86_64-linux-gnu/4.8/include-fixed /usr/include/x86_64-linux-gnu /usr/include end of search list. gnu c (ubuntu 4.8.2-19ubuntu1) version 4.8.2 (x86_64-linux-gnu) compiled gnu c version 4.8.2, gmp version 5.1.3, mpfr version 3.1.2-p3, mpc version 1.0.1 ggc heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072 compiler executable checksum: dc75e0628c9356affcec059d0c81cc01 ssl_client.c: in function ‘initctx’: ssl_client.c:68:12: warning: assignment discards ‘const’ qualifier pointer target type [enabled default] method = sslv3_client_method(); /* create new client-method instance */ ^ collect_gcc_options='-v' '-l/usr/local/lib' '-o' 'sslconnect' '-mtune=generic' '-march=x86-64' -v --64 -o /tmp/ccitcmac.o /tmp/ccvabqoe.s gnu assembler version 2.24 (x86_64-linux-gnu) using bfd version (gnu binutils ubuntu) 2.24 compiler_path=/usr/lib/gcc/x86_64-linux-gnu/4.8/:/usr/lib/gcc/x86_64-linux-gnu/4.8/:/usr/lib/gcc/x86_64-linux-gnu/:/usr/lib/gcc/x86_64-linux-gnu/4.8/:/usr/lib/gcc/x86_64-linux-gnu/ library_path=/home/firmwaredev/dev/yocto/build_etn-cgtqmx6/tmp/sysroots/x86_64-linux/usr/lib/../lib/:/usr/lib/gcc/x86_64-linux-gnu/4.8/:/usr/lib/gcc/x86_64-linux-gnu/4.8/../../../x86_64-linux-gnu/:/usr/lib/gcc/x86_64-linux-gnu/4.8/../../../../lib/:/lib/x86_64-linux-gnu/:/lib/../lib/:/usr/lib/x86_64-linux-gnu/:/usr/lib/../lib/:/home/firmwaredev/dev/yocto/build_etn-cgtqmx6/tmp/sysroots/x86_64-linux/usr/lib/:./:/usr/lib/gcc/x86_64-linux-gnu/4.8/../../../:/lib/:/usr/lib/ collect_gcc_options='-v' '-l/usr/local/lib' '-o' 'sslconnect' '-mtune=generic' '-march=x86-64' /usr/lib/gcc/x86_64-linux-gnu/4.8/collect2 --sysroot=/ --build-id --eh-frame-hdr -m elf_x86_64 --hash-style=gnu --as-needed -dynamic-linker /lib64/ld-linux-x86-64.so.2 -z relro -o sslconnect /usr/lib/gcc/x86_64-linux-gnu/4.8/../../../x86_64-linux-gnu/crt1.o /usr/lib/gcc/x86_64-linux-gnu/4.8/../../../x86_64-linux-gnu/crti.o /usr/lib/gcc/x86_64-linux-gnu/4.8/crtbegin.o -l/usr/local/lib -l/home/firmwaredev/dev/yocto/build_etn-cgtqmx6/tmp/sysroots/x86_64-linux/usr/lib/../lib -l/usr/lib/gcc/x86_64-linux-gnu/4.8 -l/usr/lib/gcc/x86_64-linux-gnu/4.8/../../../x86_64-linux-gnu -l/usr/lib/gcc/x86_64-linux-gnu/4.8/../../../../lib -l/lib/x86_64-linux-gnu -l/lib/../lib -l/usr/lib/x86_64-linux-gnu -l/usr/lib/../lib -l/home/firmwaredev/dev/yocto/build_etn-cgtqmx6/tmp/sysroots/x86_64-linux/usr/lib -l. -l/usr/lib/gcc/x86_64-linux-gnu/4.8/../../.. /tmp/ccitcmac.o -lcrypto -lssl -lgcc --as-needed -lgcc_s --no-as-needed -lc -lgcc --as-needed -lgcc_s --no-as-needed /usr/lib/gcc/x86_64-linux-gnu/4.8/crtend.o /usr/lib/gcc/x86_64-linux-gnu/4.8/../../../x86_64-linux-gnu/crtn.o /tmp/ccitcmac.o: in function `initctx': ssl_client.c:(.text+0x19c): undefined reference `openssl_add_all_algorithms_noconf' ssl_client.c:(.text+0x1a1): undefined reference `ssl_load_error_strings' ssl_client.c:(.text+0x1a6): undefined reference `sslv3_client_method' /tmp/ccitcmac.o: in function `main': ssl_client.c:(.text+0x32f): undefined reference `ssl_library_init' collect2: error: ld returned 1 exit status
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