Re: Error running configure on Mac

On Sun, Jan 23, 2022 at 11:14 PM Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:

> samay sharma <smilingsamay(at)gmail(dot)com> writes:
> > I was trying to build Postgres from source on my Mac (MacOS Monterey
> 12.1)
> > and ran into an error when running configure.
>
> Works for me, and for other developers, and for assorted buildfarm
> animals.
>
> > checking for gcc option to accept ISO C99... unsupported
> > configure: error: C compiler "gcc" does not support C99
>
> That is bizarre. Can you show the segment of config.log
> that corresponds to this? The exact error message that
> the compiler is reporting would be useful.
>

The line above the error message in config.log is:

configure:4607: result: unsupported

configure:4623: error: C compiler "gcc" does not support C99

Slightly above that, I see this error message too:

configure:4591: gcc -qlanglvl=extc99 -c -g -O2 conftest.c >&5

clang: error: unknown argument: '-qlanglvl=extc99'

configure:4591: $? = 1

configure: failed program was:

....

I also see many more error messages in config.log when I grep for error.
So, I've attached the entire file in case any other output is useful.

> Also, I wonder if you are using Apple's gcc (yeah, that's
> really clang), or a gcc from MacPorts or Brew or the like.
>

I've pasted the output of gcc --version in the previous email which reports
it to be Apple clang version 13.0.0 (clang-1300.0.27.3). Is there any other
command which I can run to give more info about this?

Regards,
Samay

>
> regards, tom lane
>