Re: Unable to compile postgresql-18.1

I have manually directed the LD_LIBRARY_PATH to /usr/lib64 but I get the
same error message.
Any suggestions?
Thanks
Ibrahim Shaame

On Wed, Jan 21, 2026 at 9:49 AM Ibrahim Shaame <ishaame(at)gmail(dot)com> wrote:

> Hello Erik,
> Thank you for the response. As for LIBRARY_PATH, I have always manually
> compiled postgresql and I don't explicitly mention the LIBRARY_PATH
> directory. That's why I am surprised why this time with this subversion
> doesn't work just as it worked in the last version.
>
> Thanks
> Ibrahim
>
> On Sun, Jan 18, 2026 at 7:29 PM Erik Wienhold <ewie(at)ewie(dot)name> wrote:
>
>> On 2026-01-02 19:23 +0100, Ibrahim Shaame wrote:
>> > I have tried to compile from source postgresql-18.1 but it fails and I
>> get
>> > the following error:
>> >
>> > gcc: fatal error: cannot read spec file ‘./specs’: Is a directory
>> > compilation terminated.
>> > make[2]: *** [<builtin>: isolationtester.o] Error 1
>> > make[2]: Leaving directory
>> > '/data/dwnlds/dwnld_slack/postgresql-18.1/src/test/isolation'
>> > make[1]: *** [Makefile:42: all-test/isolation-recurse] Error 2
>> > make[1]: Leaving directory
>> '/data/dwnlds/dwnld_slack/postgresql-18.1/src'
>> > make: *** [GNUmakefile:11: all-src-recurse] Error 2
>> >
>> > Last compilation of postgresql-18.0 worked perfectly without issue and
>> on
>> > the same laptop
>> > Any suggestions?
>> >
>> > I am on : Slackware64 Linux 15.0 (Current)
>> > Acer E5-771 laptop
>>
>> What are exact build commands you've executed?
>>
>> Could be that LIBRARY_PATH contains an empty path. For example, I can
>> reproduce it with:
>>
>> export LIBRARY_PATH=
>> make clean world-bin
>>
>> --
>> Erik Wienhold
>>
>