运行datastax的cpp驱动程序示例时出错

Question

我正在ubuntu14.04上运行。 我能够在计算机上安装datastax的cpp驱动程序。

但是我无法运行其任何示例

Install the project...
-- Install configuration: ""
-- Up-to-date: /usr/local/include/cassandra.h
-- Up-to-date: /usr/local/lib/libcassandra.so.0.7.0
-- Up-to-date: /usr/local/lib/libcassandra.so.0
-- Up-to-date: /usr/local/lib/libcassandra.so
-- Up-to-date: /usr/local/lib/libcassandra_static.a
root@ubuntu-cassandra:~/cpp-driver# cd -
/root/cpp-driver/examples/simple
root@ubuntu-cassandra:~/cpp-driver/examples/simple# strace -s 1024  -f -e execve  gcc -I /usr/local/include/ -L /usr/local/lib/ -lcassandra simple.c
execve("/usr/bin/gcc", ["gcc", "-I", "/usr/local/include/", "-L", "/usr/local/lib/", "-lcassandra", "simple.c"], [/* 23 vars */]) = 0
Process 30450 attached
[pid 30450] execve("/usr/lib/gcc/x86_64-linux-gnu/4.8/cc1", ["/usr/lib/gcc/x86_64-linux-gnu/4.8/cc1", "-quiet", "-I", "/usr/local/include/", "-imultiarch", "x86_64-linux-gnu", "simple.c", "-quiet", "-dumpbase", "simple.c", "-mtune=generic", "-march=x86-64", "-auxbase", "simple", "-fstack-protector", "-Wformat", "-Wformat-security", "-o", "/tmp/cc8RgD1Y.s"], [/* 26 vars */]) = 0
[pid 30450] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=30450, si_status=0, si_utime=3, si_stime=1} ---
Process 30451 attached
[pid 30451] execve("/usr/local/sbin/as", ["as", "-I", "/usr/local/include/", "--64", "-o", "/tmp/ccCetiDS.o", "/tmp/cc8RgD1Y.s"], [/* 26 vars */]) = -1 ENOENT (No such file or directory)
[pid 30451] execve("/usr/local/bin/as", ["as", "-I", "/usr/local/include/", "--64", "-o", "/tmp/ccCetiDS.o", "/tmp/cc8RgD1Y.s"], [/* 26 vars */]) = -1 ENOENT (No such file or directory)
[pid 30451] execve("/usr/sbin/as", ["as", "-I", "/usr/local/include/", "--64", "-o", "/tmp/ccCetiDS.o", "/tmp/cc8RgD1Y.s"], [/* 26 vars */]) = -1 ENOENT (No such file or directory)
[pid 30451] execve("/usr/bin/as", ["as", "-I", "/usr/local/include/", "--64", "-o", "/tmp/ccCetiDS.o", "/tmp/cc8RgD1Y.s"], [/* 26 vars */]) = 0
[pid 30451] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=30451, si_status=0, si_utime=0, si_stime=0} ---
Process 30452 attached
[pid 30452] execve("/usr/lib/gcc/x86_64-linux-gnu/4.8/collect2", ["/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", "/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/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/usr/lib/gcc/x86_64-linux-gnu/4.8/../../..", "-lcassandra", "/tmp/ccCetiDS.o", "-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"], [/* 28 vars */]) = 0
Process 30453 attached
[pid 30453] execve("/usr/bin/ld", ["/usr/bin/ld", "--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", "/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/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/usr/lib/gcc/x86_64-linux-gnu/4.8/../../..", "-lcassandra", "/tmp/ccCetiDS.o", "-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"], [/* 28 vars */]) = 0
[pid 30453] +++ exited with 1 +++
[pid 30452] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=30453, si_status=1, si_utime=2, si_stime=1} ---
/tmp/ccCetiDS.o: In function `main':
simple.c:(.text+0x1b): undefined reference to `cass_cluster_new'
simple.c:(.text+0x88): undefined reference to `cass_cluster_setopt'
simple.c:(.text+0xae): undefined reference to `cass_cluster_connect'
simple.c:(.text+0xc4): undefined reference to `cass_future_wait'
simple.c:(.text+0xd3): undefined reference to `cass_future_error_code'
simple.c:(.text+0xf5): undefined reference to `cass_future_get_session'
simple.c:(.text+0x116): undefined reference to `cass_string_init'
simple.c:(.text+0x13b): undefined reference to `cass_statement_new'
simple.c:(.text+0x155): undefined reference to `cass_session_execute'
simple.c:(.text+0x165): undefined reference to `cass_future_wait'
simple.c:(.text+0x171): undefined reference to `cass_future_error_code'
simple.c:(.text+0x190): undefined reference to `cass_future_get_result'
simple.c:(.text+0x1a0): undefined reference to `cass_iterator_from_result'
simple.c:(.text+0x1b5): undefined reference to `cass_iterator_get_row'
simple.c:(.text+0x1ca): undefined reference to `cass_row_get_column'
simple.c:(.text+0x1d9): undefined reference to `cass_value_get_string'
simple.c:(.text+0x1ea): undefined reference to `cass_row_get_column'
simple.c:(.text+0x1fc): undefined reference to `cass_value_get_bool'
simple.c:(.text+0x20d): undefined reference to `cass_row_get_column'
simple.c:(.text+0x21c): undefined reference to `cass_value_get_string'
simple.c:(.text+0x22d): undefined reference to `cass_row_get_column'
simple.c:(.text+0x23c): undefined reference to `cass_value_get_string'
simple.c:(.text+0x295): undefined reference to `cass_iterator_next'
simple.c:(.text+0x2a9): undefined reference to `cass_result_free'
simple.c:(.text+0x2b5): undefined reference to `cass_iterator_free'
simple.c:(.text+0x2c3): undefined reference to `cass_future_error_message'
simple.c:(.text+0x2fa): undefined reference to `cass_future_free'
simple.c:(.text+0x309): undefined reference to `cass_session_close'
simple.c:(.text+0x319): undefined reference to `cass_future_wait'
simple.c:(.text+0x32a): undefined reference to `cass_future_error_message'
simple.c:(.text+0x364): undefined reference to `cass_future_free'
simple.c:(.text+0x373): undefined reference to `cass_cluster_free'
collect2: error: ld returned 1 exit status
[pid 30452] +++ exited with 1 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=30452, si_status=1, si_utime=0, si_stime=0} ---
+++ exited with 1 +++

我不能推断出为什么作为图书馆存在于道路上又调试输出这种情况正在发生： 链接

在进一步调查中，我分别编译和链接了文件。 仍然没有进展

root@ubuntu-cassandra:~/cpp-driver/examples/simple# g++ -g -v -o simpler -L /usr/local/lib/ -lcassandra simple.o
Using built-in specs.
COLLECT_GCC=g++
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)
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=/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/:/usr/lib/gcc/x86_64-linux-gnu/4.8/../../../:/lib/:/usr/lib/
COLLECT_GCC_OPTIONS='-g' '-v' '-o' 'simpler' '-L/usr/local/lib/' '-shared-libgcc' '-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 simpler /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/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/usr/lib/gcc/x86_64-linux-gnu/4.8/../../.. -lcassandra simple.o -lstdc++ -lm -lgcc_s -lgcc -lc -lgcc_s -lgcc /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
simple.o: In function `main':
simple.c:(.text+0x1b): undefined reference to `cass_cluster_new'
simple.c:(.text+0x88): undefined reference to `cass_cluster_setopt'
simple.c:(.text+0xae): undefined reference to `cass_cluster_connect'
simple.c:(.text+0xc4): undefined reference to `cass_future_wait'
simple.c:(.text+0xd3): undefined reference to `cass_future_error_code'
simple.c:(.text+0xf5): undefined reference to `cass_future_get_session'
simple.c:(.text+0x116): undefined reference to `cass_string_init'
simple.c:(.text+0x13b): undefined reference to `cass_statement_new'
simple.c:(.text+0x155): undefined reference to `cass_session_execute'
simple.c:(.text+0x165): undefined reference to `cass_future_wait'
simple.c:(.text+0x171): undefined reference to `cass_future_error_code'
simple.c:(.text+0x190): undefined reference to `cass_future_get_result'
simple.c:(.text+0x1a0): undefined reference to `cass_iterator_from_result'
simple.c:(.text+0x1b5): undefined reference to `cass_iterator_get_row'
simple.c:(.text+0x1ca): undefined reference to `cass_row_get_column'
simple.c:(.text+0x1d9): undefined reference to `cass_value_get_string'
simple.c:(.text+0x1ea): undefined reference to `cass_row_get_column'
simple.c:(.text+0x1fc): undefined reference to `cass_value_get_bool'
simple.c:(.text+0x20d): undefined reference to `cass_row_get_column'
simple.c:(.text+0x21c): undefined reference to `cass_value_get_string'
simple.c:(.text+0x22d): undefined reference to `cass_row_get_column'
simple.c:(.text+0x23c): undefined reference to `cass_value_get_string'
simple.c:(.text+0x295): undefined reference to `cass_iterator_next'
simple.c:(.text+0x2a9): undefined reference to `cass_result_free'
simple.c:(.text+0x2b5): undefined reference to `cass_iterator_free'
simple.c:(.text+0x2c3): undefined reference to `cass_future_error_message'
simple.c:(.text+0x2fa): undefined reference to `cass_future_free'
simple.c:(.text+0x309): undefined reference to `cass_session_close'
simple.c:(.text+0x319): undefined reference to `cass_future_wait'
simple.c:(.text+0x32a): undefined reference to `cass_future_error_message'
simple.c:(.text+0x364): undefined reference to `cass_future_free'
simple.c:(.text+0x373): undefined reference to `cass_cluster_free'
collect2: error: ld returned 1 exit status
root@ubuntu-cassandra:~/cpp-driver/examples/simple# nm simple.o
                 U cass_cluster_connect
                 U cass_cluster_free
                 U cass_cluster_new
                 U cass_cluster_setopt
                 U cass_future_error_code
                 U cass_future_error_message
                 U cass_future_free
                 U cass_future_get_result
                 U cass_future_get_session
                 U cass_future_wait
                 U cass_iterator_free
                 U cass_iterator_from_result
                 U cass_iterator_get_row
                 U cass_iterator_next
                 U cass_result_free
                 U cass_row_get_column
                 U cass_session_close
                 U cass_session_execute
                 U cass_statement_new
                 U cass_string_init
                 U cass_value_get_bool
                 U cass_value_get_string
                 U fprintf
0000000000000000 T main
                 U printf
                 U stderr
                 U strlen

Answer 1

您需要在命令中的后面加上“ -lcassandra”，而不是“ simple.o”：

g++ simple.o -g -o simpler -L/usr/local/lib/ -lcassandra

这是我找到的答案，它解释了为什么： 为什么gcc中“ -l”选项的顺序很重要？