postgreSQL Compilation and linking

During compilation, you have to add the PostgreSQL include directory, which can be found with pg_config --includedir, to the include path.

You must link with the PostgreSQL client shared library (libpq.so on UNIX, libpq.dll on Windows). This library is in the PostgreSQL library directory, which can be found with pg_config -- libdir.

Note: For historical reason, the library is called libpq.soand not libpg.so, which is a popular trap for beginners.

Given that the below code sample is in file coltype.c, compilation and linking would be done with

gcc -Wall -I "$(pg_config --includedir)" -L "$(pg_config --libdir)" -o coltype coltype.c -lpq

with the GNU C compiler (consider adding -Wl,-rpath,"$(pg_config --libdir)" to add the library search path) or with

cl /MT /W4 /I <include directory> coltype.c <path to libpq.lib>

on Windows with Microsoft Visual C.

Conclusion

In this page (written and validated by A. Gawali) you learned about postgreSQL Compilation and linking . What's Next? If you are interested in completing postgreSQL tutorial, your next topic will be learning about: postgreSQL Aggregate Functions.

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