Build with --disable-gpg fails

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Hi,

I've been trying to build GnuPG 2.2.19 and 2.2.20 today and found that, with
./configure --disable-gpg, and with --disable-all-tests in addition too, I got
the error
make[4]: *** No rule to make target '../../g10/gpg.exe', needed by 'all-
local'.  Stop.
make[4]: Leaving directory '/home/john/foo/gnupg-2.2.20/tests/openpgp'

This isn't specific to Windows cross-building. Doing it natively got the
similar but different error
gcc -Wall -Wno-pointer-sign -Wpointer-arith -g -O2    ../../g10/gpg.c   -o
../../g10/gpg
../../g10/gpg.c:22:10: fatal error: config.h: No such file or directory
   22 | #include <config.h>
      |          ^~~~~~~~~~
compilation terminated.
make[3]: *** [<builtin>: ../../g10/gpg] Error 1
make[3]: *** Waiting for unfinished jobs....
mv -f .deps/fake-pinentry.Tpo .deps/fake-pinentry.Po
make[3]: Leaving directory '/home/john/bar/gnupg-2.2.20/tests/openpgp'

I'd also like to inform you that [1] says bug reports should be sent to this
mailing list, in case that's outdated in light of dev.gnupg.org

[1] https://www.gnupg.org/download/git.html
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On Tue, 26 May 2020 21:49, John Scott said:

> I've been trying to build GnuPG 2.2.19 and 2.2.20 today and found that, with
> ./configure --disable-gpg, and with --disable-all-tests in addition

Oh well, I forgot about that option.  I doubt that it makes any sense to
build without gpg becuase gpg is also used by other components
indirectly.  I better remove the --disable-gpg feature.

Is there a special reason why you do this?

> make[4]: *** No rule to make target '../../g10/gpg.exe', needed by 'all-
> local'.  Stop.

Obvious.  The tests require that all programs have been built.
--disable-all-tests is not what one would expect - it is actually the
default.  While preparing a distribution we use --enable-all-tests to
run a bunch or extra tests which don't make much sense for
non-maintainers.

But, right: The --disable-COMPONENT options and the test suite don't
work well together. We should do something about it; see
https://dev.gnupg.org/T4960


> gcc -Wall -Wno-pointer-sign -Wpointer-arith -g -O2    ../../g10/gpg.c   -o
> ../../g10/gpg
> ../../g10/gpg.c:22:10: fatal error: config.h: No such file or directory

config.h is a built file; you forgot to run configure.

> I'd also like to inform you that [1] says bug reports should be sent to this
> mailing list, in case that's outdated in light of dev.gnupg.org

That's okay; only a few eyes will see bug reports at dev.gnupg.org; on
the ML you have a good chance that others already know a solution or are
interested in the same problem.  For the development branch it is quite
normal that certain bugs show up and are fixed some time later.


Shalom-Salam,

   Werner

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On Friday, May 29, 2020 8:08:11 AM EDT Werner Koch wrote:
> Is there a special reason why you do this?
I didn't need the gpg binary, for my purpose I just needed a very minimal
gpgsm, Dirmngr and gpg-agent build that need not have OpenPGP support.
--disable-gpg shows both
config.status: creating tests/openpgp/Makefile
...
        GnuPG v2.2.20 has been configured as follows:

        Revision:  5094bb08e  (20628)
        Platform:  GNU/Linux (x86_64-pc-linux-gnu)

        OpenPGP:   no


> > gcc -Wall -Wno-pointer-sign -Wpointer-arith -g -O2    ../../g10/gpg.c   -o
> > ../../g10/gpg
> > ../../g10/gpg.c:22:10: fatal error: config.h: No such file or directory
>
> config.h is a built file; you forgot to run configure.
I did not, I ran configure to do --disable-gpg.
Doing ./configure --disable-gpg and running make in a fresh tree gets me the
error again.
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