[PATCH] build: add option to choose to build with or without JSON audit support

[Douglas Bagnall]

hi Björn,

> I've prepared an option to disable or enforce the build with support for
> JSON auth audit, which needs the jansson library.
> 
> By default the jansson library is auto-detected and is then used for the
> JSON auth audit method.

This is largely reverting 8e54bc463adcfbc322249ba626e2c503ca13a864,
the justification for which was (quoting Andrew Bartlett, 2018-02-11 in
https://lists.samba.org/archive/samba-technical/2018-February/125542.html):

>> I worry that changes to our build system could mean we run less tests
>> than we expect, either if the host changes or if the glue between the
>> two parts breaks, and we might not notice.
>> 
>> So instead I propose to make Samba fail to build if jansson is missing
>> on the AD DC, and lock in the requirement for TLS support in the test
>> scripts.

We have ended up before with tests that never get run because they
depend on config options that nobody uses.

Is there some way of meeting those concerns in this patch? Would
squashing this in be acceptable?:

diff --git a/script/autobuild.py b/script/autobuild.py
index e00eebda1c1..0dd52ebbc67 100755
--- a/script/autobuild.py
+++ b/script/autobuild.py
@@ -75,7 +75,8 @@ if os.environ.get("AUTOBUILD_SKIP_SAMBA_O3", "0") == "1":
     defaulttasks.remove("samba-o3")
 
 ctdb_configure_params = " --enable-developer --picky-developer ${PREFIX}"
-samba_configure_params = " --picky-developer ${PREFIX} ${EXTRA_PYTHON} --with-profiling-data"
+samba_configure_params = (" --picky-developer ${PREFIX} ${EXTRA_PYTHON}"
+                          " --with-profiling-data --with-json-audit")
 

That lets you run make test without jansson but means autobuild
requires it.

cheers,
Douglas