Re: Does Debian supports backticks in the Makefile?

[gene heskett <gheskett@shentel.net>]

On 7/11/22 10:24, Greg Wooledge wrote:
> On Mon, Jul 11, 2022 at 08:55:20AM -0500, Igor Korot wrote:
> > This is what Gentoo generates:
> > /bin/sh ../libtool  --tag=CXX   --mode=compile g++ -DHAVE_CONFIG_H -I.
> > -I/home/igor/dbhandler/libpostgres -I..    -D__WXGTK__
> > -I../../dbinterface `pg_config --includedir`  -g -O0 -MT
> > libpostgres_la-database_postgres.lo -MD -MP -MF
> > .deps/libpostgres_la-database_postgres.Tpo -c -o
> > libpostgres_la-database_postgres.lo `test -f 'database_postgres.cpp'
> > || echo '/home/igor/dbhandler/libpostgres/'`database_postgres.cpp
> OK.  I see that you have the same "I forgot -I" bug in your Makefile.
>
> > libtool: compile:  g++ -DHAVE_CONFIG_H -I.
> > -I/home/igor/dbhandler/libpostgres -I.. -D__WXGTK__
> > -I../../dbinterface /usr/include/postgresql-14 -g -O0 -MT
> > libpostgres_la-database_postgres.lo -MD -MP -MF
> > .deps/libpostgres_la-database_postgres.Tpo -c
> > /home/igor/dbhandler/libpostgres/database_postgres.cpp  -fPIC -DPIC -o
> > .libs/libpostgres_la-database_postgres.o
> And there's the expanded command.  As you can see, it is wrong.
>
> > g++: warning: /usr/include/postgresql-14: linker input file unused
> > because linking not done
> And you got a warning for the wrongness.
>
> So, you are wondering why it actually compiled correctly.  Best guess:
> on Gentoo, you have the libpq-fe.h file in a different directory, which
> is in the C++ compiler's search list.  Maybe there's a symlink.  In any
> case, the -I/usr/include/postgresql-14 argument isn't needed on Gentoo.
>
> If you really want to dig into it, start with something like
> "locate libpq-fe.h" and see all of the places it appears.  Then see what
> directories are in the compiler's search list, etc.
>
> .
As a reminder, locate's database might be stale, so it is probably a 
good idea
to sudo updatedb before running locate, assuring then that it has an 
uptodate
database.  I think it does a weekly update, but if Igor is installing stuff
from the error messages, that is probably something he should be doing after
installing something missing.

Cheers, Gene Heskett.
--
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author, 1940)
If we desire respect for the law, we must first make the law respectable.
 - Louis D. Brandeis
Genes Web page <http://geneslinuxbox.net:6309/>