[PATCH 2/2] meson: Declare GLIB_VERSION_* macros at configure

[Michal Prívozník]

On 5/3/21 10:17 AM, Pavel Hrdina wrote:
> On Fri, Apr 30, 2021 at 07:18:49AM +0200, Michal Privoznik wrote:
>> So far we have three places where glib version is recorded:
>> meson.build and then in config.h. The latter is so well hidden
>> that it's easy to miss when bumping minimal glib version in the
>> former. With a bit of python^Wmeson string magic
>> GLIB_VERSION_MIN_REQUIRED and GLIB_VERSION_MAX_ALLOWED macros can
>> be defined to match glib_version from meson.build.
>>
>> Signed-off-by: Michal Privoznik <mprivozn at redhat.com>
>> ---
>>  config.h    | 10 ----------
>>  meson.build |  7 +++++++
>>  2 files changed, 7 insertions(+), 10 deletions(-)
>>
>> diff --git a/config.h b/config.h
>> index ca6720f37d..0eacfd139d 100644
>> --- a/config.h
>> +++ b/config.h
>> @@ -51,13 +51,3 @@
>>  #else
>>  # error You either need at least GCC 4.8 or Clang 3.4 or XCode Clang 5.1 to compile libvirt
>>  #endif
>> -
>> -/* Ask for warnings for anything that was marked deprecated in
>> - * the defined version, or before. It is a candidate for rewrite.
>> - */
>> -#define GLIB_VERSION_MIN_REQUIRED GLIB_VERSION_2_48
>> -
>> -/* Ask for warnings if code tries to use function that did not
>> - * exist in the defined version. These risk breaking builds
>> - */
>> -#define GLIB_VERSION_MAX_ALLOWED GLIB_VERSION_2_48
>> diff --git a/meson.build b/meson.build
>> index 951da67896..597e5d8a13 100644
>> --- a/meson.build
>> +++ b/meson.build
>> @@ -949,6 +949,13 @@ endif
>>  glib_dep = declare_dependency(
>>    dependencies: [ glib_dep, gobject_dep, gio_dep ],
>>  )
>> +glib_version_arr=glib_version.split('.')
> 
> s/=/ = /
> 
> In the spirit of removing duplicated code how about having another
> variable:
> 
> glib_version_str = 'GLIB_VERSION_ at 0@_ at 1@'.format(glib_version_arr[0], glib_version_arr[1])
> 
> and using it in the following code?

Sounds good. I was happy that it worked and did not think that much
about it. Let me send v2.

Michal