Re: Implicit make rules break test examples

Thank you for the explanation! That makes sense. It is strange that it does
not work for me.

> What platform are you on exactly, and what toolchain (gcc and ld
> versions) are you using?

I'm using Ubuntu 18.04.1 LTS.

gcc version:
gcc (Ubuntu 7.3.0-27ubuntu1~18.04) 7.3.0

ld version:
GNU ld (GNU Binutils for Ubuntu) 2.30

Regards,
Donald Dong

On Tue, Jan 1, 2019 at 9:54 AM Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:

> Donald Dong <xdong(at)csumb(dot)edu> writes:
> > In src/test/example, the implicit make rules produce errors:
>
> Hm. "make" in src/test/examples works fine for me.
>
> The only way I can account for the results you're showing is if your
> linker is preferring libpq.a to libpq.so, so that reading the library
> before the *.o files causes none of it to get pulled in. But that
> isn't the default behavior on any modern platform AFAIK, and certainly
> isn't considered good practice these days. Moreover, if that's what's
> happening, I don't see how you would have managed to build PG at all,
> because there are a lot of other places where our Makefiles write
> $(LDFLAGS) before the *.o files they're trying to link. Maybe we
> shouldn't have done it like that, but it's been working for everybody
> else.
>
> What platform are you on exactly, and what toolchain (gcc and ld
> versions) are you using?
>
> regards, tom lane
>

--
Donald Dong