Обсуждение: Could not build from source /usr/bin/ld: cannot find -lpgcommon_shlib

Dennis Suratna <dennis.suratna@gmail.com> writes:
> I am attempting to build postgres from source with a custom prefix
> directory and I am faced with the following error:

> /usr/bin/ld: cannot find -lpgcommon_shlib
> collect2: error: ld returned 1 exit status

What platform is that, exactly?

> This is the command that I ran:
> # Under /home/dennis/workspace/postgresql
> mkdir build_dir
> cd build_dir
> ../configure --enable-cassert --enable-debug --prefix
> /home/dennis/workspace/pgsql
> make

Hm ... it's not standard practice for the VPATH build directory to be
inside the source directory, I think --- usually the motivation for
using VPATH at all is to avoid modifying the source tree.  Having said
that, I tried such a setup (on a Fedora 30 box) and it built fine for
me.  I think there might be something wonky about your platform's
linker, or maybe make is broken?  Is src/common/libpgcommon_shlib.a
present in your build tree?

            regards, tom lane

Dennis Suratna <dennis.suratna@gmail.com> writes:
> And I got the same error. I have attached the full make output to this
> reply.

Well, this is pretty interesting:

make -C src all
make[1]: Entering directory '/home/dennis/workspace/pgsql_build/src'
make -C common all
make[2]: Entering directory '/home/dennis/workspace/pgsql_build/src/common'
make[2]: Nothing to be done for 'all'.
make[2]: Leaving directory '/home/dennis/workspace/pgsql_build/src/common'

"make" didn't find anything to do there.  However, digging through the
rest of the make log, I find that the backend link went through
successfully with

/home/dennis/workspace/pgsql_build/../postgresql/src/backend/../../src/common/libpgcommon_srv.a

If I'm counting ".."'s correctly, that's pointing at

/home/dennis/workspace/postgresql/src/common/libpgcommon_srv.a

that is, something in your source tree not your build tree.

Extrapolating, I'd guess that you have a partial build laying about in
your source tree that includes libpgcommon_shlib.a, and depending on just
how a particular Makefile is worded, the VPATH mechanism might find that
file when libpgcommon_shlib.a is asked for; it's certainly enough to
discourage make itself from building a new copy in the build tree.  But
the linker doesn't know enough to find that from "-lpgcommon_shlib".

In short, you need to clean out your source tree before trying to do a
VPATH build.  If using git, "git clean -dfx" would do it.  Otherwise
you might be best advised to blow away the tree and re-extract the
tarball you started from.

            regards, tom lane