鏈接mariadb C連接器時未定義的引用

Question

我有一些（太多）小時試圖讓mariadb C連接器使用我自己的代碼。 MySQL C連接器工作正常，但我決定遷移到mariadb。

最后我決定嘗試一個最小的代碼來檢查問題是否與我的代碼或環境有關，並且我得到了同樣的錯誤。 代碼來自SO的這個問題： 在C中使用MariaDB 。

#include <my_global.h>
#include <mysql.h>

int main(int argc, char **argv)
{  
  MYSQL *con = mysql_init(NULL);

  if (con == NULL) 
  {
      fprintf(stderr, "%s\n", mysql_error(con));
      exit(1);
  }

  if (mysql_real_connect(con, "localhost", "root", "root_pswd", 
          NULL, 0, NULL, 0) == NULL) 
  {
      fprintf(stderr, "%s\n", mysql_error(con));
      mysql_close(con);
      exit(1);
  }  

  if (mysql_query(con, "CREATE DATABASE testdb")) 
  {
      fprintf(stderr, "%s\n", mysql_error(con));
      mysql_close(con);
      exit(1);
  }

  mysql_close(con);
  exit(0);
}

並試圖用它編譯它

gcc -v -o mysql-test mysql-test.c $(mariadb_config --libs)

擴展到

gcc -v -o mysql-test mysql-test.c $(mariadb_config --libs)

我得到的輸出是

Using built-in specs.
Target: x86_64-suse-linux
Configured with: ../configure --prefix=/usr --infodir=/usr/share/info --mandir=/usr/share/man --libdir=/usr/lib64 --libexecdir=/usr/lib64 --enable-languages=c,c++,objc,fortran,obj-c++,java,ada --enable-checking=release --with-gxx-include-dir=/usr/include/c++/4.3 --enable-ssp --disable-libssp --with-bugurl=http://bugs.opensuse.org/ --with-pkgversion='SUSE Linux' --disable-libgcj --disable-libmudflap --with-slibdir=/lib64 --with-system-zlib --enable-__cxa_atexit --enable-libstdcxx-allocator=new --disable-libstdcxx-pch --enable-version-specific-runtime-libs --program-suffix=-4.3 --enable-linux-futex --without-system-libunwind --with-cpu=generic --build=x86_64-suse-linux
Thread model: posix
gcc version 4.3.4 [gcc-4_3-branch revision 152973] (SUSE Linux)
COLLECT_GCC_OPTIONS='-v' '-o' 'mysql-test' '-L/usr/local/lib/mariadb' '-mtune=generic'
 /usr/lib64/gcc/x86_64-suse-linux/4.3/cc1 -quiet -v mysql-test.c -quiet -dumpbase mysql-test.c -mtune=generic -auxbase mysql-test -version -o /tmp/ccISncmQ.s
#include "..." search starts here:
#include <...> search starts here:
 /usr/local/include
 /usr/lib64/gcc/x86_64-suse-linux/4.3/include
 /usr/lib64/gcc/x86_64-suse-linux/4.3/include-fixed
 /usr/lib64/gcc/x86_64-suse-linux/4.3/../../../../x86_64-suse-linux/include
 /usr/include
End of search list.
GNU C (SUSE Linux) version 4.3.4 [gcc-4_3-branch revision 152973] (x86_64-suse-linux)
        compiled by GNU C version 4.3.4 [gcc-4_3-branch revision 152973], GMP version 4.2.3, MPFR version 2.3.2.
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 91a878d77972b76d647d592fefc786fc
COLLECT_GCC_OPTIONS='-v' '-o' 'mysql-test' '-L/usr/local/lib/mariadb' '-mtune=generic'
 /usr/lib64/gcc/x86_64-suse-linux/4.3/../../../../x86_64-suse-linux/bin/as -V -Qy -o /tmp/ccD2nseu.o /tmp/ccISncmQ.s
GNU assembler version 2.20.0 (x86_64-suse-linux) using BFD version (GNU Binutils; SUSE Linux Enterprise 11) 2.20.0.20100122-0.7.9
COMPILER_PATH=/usr/lib64/gcc/x86_64-suse-linux/4.3/:/usr/lib64/gcc/x86_64-suse-linux/4.3/:/usr/lib64/gcc/x86_64-suse-linux/:/usr/lib64/gcc/x86_64-suse-linux/4.3/:/usr/lib64/gcc/x86_64-suse-linux/:/usr/lib64/gcc/x86_64-suse-linux/4.3/../../../../x86_64-suse-linux/bin/
LIBRARY_PATH=/usr/lib64/gcc/x86_64-suse-linux/4.3/:/usr/lib64/gcc/x86_64-suse-linux/4.3/../../../../lib64/:/lib/../lib64/:/usr/lib/../lib64/:/usr/lib64/gcc/x86_64-suse-linux/4.3/../../../../x86_64-suse-linux/lib/:/usr/lib64/gcc/x86_64-suse-linux/4.3/../../../:/lib/:/usr/lib/
COLLECT_GCC_OPTIONS='-v' '-o' 'mysql-test' '-L/usr/local/lib/mariadb' '-mtune=generic'
 /usr/lib64/gcc/x86_64-suse-linux/4.3/collect2 --build-id --eh-frame-hdr -m elf_x86_64 -dynamic-linker /lib64/ld-linux-x86-64.so.2 -o mysql-test /usr/lib64/gcc/x86_64-suse-linux/4.3/../../../../lib64/crt1.o /usr/lib64/gcc/x86_64-suse-linux/4.3/../../../../lib64/crti.o /usr/lib64/gcc/x86_64-suse-linux/4.3/crtbegin.o -L/usr/local/lib/mariadb -L/usr/lib64/gcc/x86_64-suse-linux/4.3 -L/usr/lib64/gcc/x86_64-suse-linux/4.3/../../../../lib64 -L/lib/../lib64 -L/usr/lib/../lib64 -L/usr/lib64/gcc/x86_64-suse-linux/4.3/../../../../x86_64-suse-linux/lib -L/usr/lib64/gcc/x86_64-suse-linux/4.3/../../.. /tmp/ccD2nseu.o -lmariadb -lssl -lnsl -lgcc --as-needed -lgcc_s --no-as-needed -lc -lgcc --as-needed -lgcc_s --no-as-needed /usr/lib64/gcc/x86_64-suse-linux/4.3/crtend.o /usr/lib64/gcc/x86_64-suse-linux/4.3/../../../../lib64/crtn.o
/usr/local/lib/mariadb/libmariadb.so: undefined reference to `SSL_get_error@OPENSSL_1.0.0'
/usr/local/lib/mariadb/libmariadb.so: undefined reference to `SSL_get_peer_certificate@OPENSSL_1.0.0'
/usr/local/lib/mariadb/libmariadb.so: undefined reference to `SSL_CTX_load_verify_locations@OPENSSL_1.0.0'
/usr/local/lib/mariadb/libmariadb.so: undefined reference to `SSL_set_ex_data@OPENSSL_1.0.0'
/usr/local/lib/mariadb/libmariadb.so: undefined reference to `X509_STORE_CTX_get_error_depth@OPENSSL_1.0.0'
/usr/local/lib/mariadb/libmariadb.so: undefined reference to `SSL_get_ex_data@OPENSSL_1.0.0'
/usr/local/lib/mariadb/libmariadb.so: undefined reference to `SSL_write@OPENSSL_1.0.0'
/usr/local/lib/mariadb/libmariadb.so: undefined reference to `SSL_clear@OPENSSL_1.0.0'
/usr/local/lib/mariadb/libmariadb.so: undefined reference to `CRYPTO_THREADID_set_numeric@OPENSSL_1.0.0'
/usr/local/lib/mariadb/libmariadb.so: undefined reference to `SSL_COMP_get_compression_methods@OPENSSL_1.0.0'
...

在庫路徑中安裝了LibOpenSSL 1.0.0和庫。 我也必須安裝libopenssl-devel。

在$ LD_LIBRARY_PATH，有一個到/lib64/libssl.so.1.0.0的libssl.so鏈接。 如果我執行

nm -g /usr/lib64/libssl.so

我明白了

nm: /usr/lib64/libssl.so: no symbols

libopenssl 0.9.8也已安裝

# rpm -qa | grep libopenssl
libopenssl0_9_8-0.9.8h-30.27.11
libopenssl-devel-1.0.0c-17.1
libopenssl0_9_8-32bit-0.9.8h-30.27.11
libopenssl1_0_0-1.0.0c-17.1

任何線索？ 謝謝！

更新： ldd的輸出

# ldd /usr/local/lib/mariadb/libmariadb.so
/usr/local/lib/mariadb/libmariadb.so: /lib64/libcrypto.so.1.0.0: no version information available (required by /usr/local/lib/mariadb/libmariadb.so)
/usr/local/lib/mariadb/libmariadb.so: /lib64/libssl.so.1.0.0: no version information available (required by /usr/local/lib/mariadb/libmariadb.so)
/usr/local/lib/mariadb/libmariadb.so: /lib64/libc.so.6: version `GLIBC_2.14' not found (required by /usr/local/lib/mariadb/libmariadb.so)
        linux-vdso.so.1 =>  (0x00007fff2d90f000)
        libpthread.so.0 => /lib64/libpthread.so.0 (0x00007f08bc078000)
        libdl.so.2 => /lib64/libdl.so.2 (0x00007f08bbe73000)
        libm.so.6 => /lib64/libm.so.6 (0x00007f08bbc1d000)
        libssl.so.1.0.0 => /lib64/libssl.so.1.0.0 (0x00007f08bb9c1000)
        libcrypto.so.1.0.0 => /lib64/libcrypto.so.1.0.0 (0x00007f08bb60f000)
        libc.so.6 => /lib64/libc.so.6 (0x00007f08bb2b1000)
        /lib64/ld-linux-x86-64.so.2 (0x00007f08bc521000)
        libz.so.1 => /lib64/libz.so.1 (0x00007f08bb099000)

找不到glicbc_2.14，但似乎libc.so.6應該沒問題。 在OpenSuse 11.4存儲庫中，glibc版本為glibc-2.11.3-12.15.1.x86_64.rpm

更新2：我成功地展示了符號

objdump -tT /usr/lib64/libssl.so

並且符號在那里

更新3和解決方案（解決方法）：

主要問題是libmariadb.so需要glibc 2.14，而在opensuse 11.4 glibc版本是2.11。 從opensuse 12.1安裝glibc 2.14涉及到我無法做的系統的嚴重升級。

我也嘗試使用2.0系列的連接器。 它也失敗了類似的消息。

接下來，我找了1.0系列。 我讀過以前連接器名為libmariadbclient並記得我安裝了一個libmariadbclient包，所以我將鏈接器標志更改為-lmariadbclient並且...... 它工作了！

但鏈接器不使用libmariadbclient包中的庫，而是使用連接器（libmariadbclient.a）中包含的靜態庫。 因此靜態鏈接連接器對我有用。

Answer 1

MariaDB Connector / C需要OpenSSL 1.0.1或更高版本。

請參閱從源構建連接器/ C的先決條件

另請注意，OpenSSL版本<1.0.2已被清除，可能容易受到攻擊。