Question

我正在尝试构建与PostgreSQL一起运行的SOCI库。我按照以下步骤操作：

在Ubutu 15.10中安装PostgreSQL
下载SOCI源代码
提取社会责任代码

然后我运行以下命令：

mkdir build
cd build
cmake -G "Unix Makefiles" -DWITH_BOOST=OFF -DWITH_POSTGRESQL=ON -DPOSTGRESQL_INCLUDE_DIR=/usr/local/pgsql/include -DPOSTGRESQL_LIBRARIES=/usr/local/pgsql/lib ../soci

此时，CMake发出以下警告：

WARNING: Target "soci_postgresql" requests linking to directory "/usr/local/pgsql/lib".  Targets may link only to libraries.  CMake is dropping the item.
WARNING: Target "soci_postgresql_static" requests linking to directory "/usr/local/pgsql/lib".  Targets may link only to libraries.  CMake is dropping the item.
WARNING: Target "soci_postgresql_test" requests linking to directory "/usr/local/pgsql/lib".  Targets may link only to libraries.  CMake is dropping the item.
WARNING: Target "soci_postgresql_test" requests linking to directory "/usr/local/pgsql/lib".  Targets may link only to libraries.  CMake is dropping the item.
WARNING: Target "soci_postgresql_test_static" requests linking to directory "/usr/local/pgsql/lib".  Targets may link only to libraries.  CMake is dropping the item.
WARNING: Target "soci_postgresql_test_static" requests linking to directory "/usr/local/pgsql/lib".  Targets may link only to libraries.  CMake is dropping the item.

继续构建，然后我运行make，失败并出现以下错误：

[ 98%] Building CXX object tests/postgresql/CMakeFiles/soci_postgresql_test.dir/test-postgresql.cpp.o
Linking CXX executable ../../bin/soci_postgresql_test
../../lib/libsoci_postgresql.so.4.0.0: undefined reference to `PQresultStatus'
../../lib/libsoci_postgresql.so.4.0.0: undefined reference to `PQgetvalue'
../../lib/libsoci_postgresql.so.4.0.0: undefined reference to `PQclear'
../../lib/libsoci_postgresql.so.4.0.0: undefined reference to `PQserverVersion'
../../lib/libsoci_postgresql.so.4.0.0: undefined reference to `PQresultErrorMessage'
../../lib/libsoci_postgresql.so.4.0.0: undefined reference to `PQexec'
../../lib/libsoci_postgresql.so.4.0.0: undefined reference to `lo_lseek'
../../lib/libsoci_postgresql.so.4.0.0: undefined reference to `PQfsize'
../../lib/libsoci_postgresql.so.4.0.0: undefined reference to `PQgetisnull'
../../lib/libsoci_postgresql.so.4.0.0: undefined reference to `PQerrorMessage'
../../lib/libsoci_postgresql.so.4.0.0: undefined reference to `lo_open'
../../lib/libsoci_postgresql.so.4.0.0: undefined reference to `PQexecPrepared'
../../lib/libsoci_postgresql.so.4.0.0: undefined reference to `PQftype'
../../lib/libsoci_postgresql.so.4.0.0: undefined reference to `lo_close'
../../lib/libsoci_postgresql.so.4.0.0: undefined reference to `PQexecParams'
../../lib/libsoci_postgresql.so.4.0.0: undefined reference to `PQfname'
../../lib/libsoci_postgresql.so.4.0.0: undefined reference to `PQconnectdb'
../../lib/libsoci_postgresql.so.4.0.0: undefined reference to `PQstatus'
../../lib/libsoci_postgresql.so.4.0.0: undefined reference to `PQntuples'
../../lib/libsoci_postgresql.so.4.0.0: undefined reference to `PQresultErrorField'
../../lib/libsoci_postgresql.so.4.0.0: undefined reference to `PQfformat'
../../lib/libsoci_postgresql.so.4.0.0: undefined reference to `lo_read'
../../lib/libsoci_postgresql.so.4.0.0: undefined reference to `PQfinish'
../../lib/libsoci_postgresql.so.4.0.0: undefined reference to `PQprepare'
../../lib/libsoci_postgresql.so.4.0.0: undefined reference to `lo_write'
../../lib/libsoci_postgresql.so.4.0.0: undefined reference to `PQcmdTuples'
../../lib/libsoci_postgresql.so.4.0.0: undefined reference to `PQnfields'
collect2: error: ld returned 1 exit status
tests/postgresql/CMakeFiles/soci_postgresql_test.dir/build.make:89: recipe for target 'bin/soci_postgresql_test' failed
make[2]: *** [bin/soci_postgresql_test] Error 1
CMakeFiles/Makefile2:609: recipe for target 'tests/postgresql/CMakeFiles/soci_postgresql_test.dir/all' failed
make[1]: *** [tests/postgresql/CMakeFiles/soci_postgresql_test.dir/all] Error 2
Makefile:126: recipe for target 'all' failed
make: *** [all] Error 2

知道CMake警告和构建错误的原因可能是什么？

Answer 1

尝试使用稍微不同的选项调用cmake

cmake -G "Unix Makefiles" -DWITH_BOOST=OFF -DWITH_POSTGRESQL=ON \
  -DPOSTGRESQL_INCLUDE_DIR:STRING="/usr/local/pgsql/include" \
  -DPOSTGRESQL_LIBRARIES:STRING="/usr/local/pgsql/lib" ../soci

Answer 2

我从github得到了正确的答案here is link。以下答复主要来自那里，但为了方便（清理和澄清）在这里重复：

-DPOSTGRESQL_LIBRARIES=/usr/local/psql/lib应该指向库，而不是目录。

以下警告已经强调了这一点：

警告：目标“soci_postgresql”请求链接到目录 “在/ usr /本地/ PostgreSQL的/ lib中”

请尝试使用以下命令（您可能还需要首先从构建目录中删除CMakeCache.txt）：

cmake -G "Unix Makefiles" -DWITH_BOOST=OFF -DWITH_POSTGRESQL=ON ../soci

在安装了"postgresql-devel.x86_64 : PostgreSQL development header files and libraries"的Linux系统上，此命令应该足够了。

如何使用PostgreSQL构建SOCI？

2 个答案: