Freeciv

Meson-1.12:

../../src/meson.build:3256: WARNING: '/home/cazfi/freeciv/S3_2/builds/mall_33/freeciv.6' is a generated file, and should be passed by reference instead of string name. This will become a hard error in Meson 2.0
../../src/meson.build:3256: WARNING: '/home/cazfi/freeciv/S3_2/builds/mall_33/freeciv-client.6' is a generated file, and should be passed by reference instead of string name. This will become a hard error in Meson 2.0
../../src/meson.build:3256: WARNING: '/home/cazfi/freeciv/S3_2/builds/mall_33/freeciv-manual.6' is a generated file, and should be passed by reference instead of string name. This will become a hard error in Meson 2.0
../../src/meson.build:3256: WARNING: '/home/cazfi/freeciv/S3_2/builds/mall_33/freeciv-modpack.6' is a generated file, and should be passed by reference instead of string name. This will become a hard error in Meson 2.0
../../src/meson.build:3256: WARNING: '/home/cazfi/freeciv/S3_2/builds/mall_33/freeciv-ruledit.6' is a generated file, and should be passed by reference instead of string name. This will become a hard error in Meson 2.0
../../src/meson.build:3256: WARNING: '/home/cazfi/freeciv/S3_2/builds/mall_33/freeciv-ruleup.6' is a generated file, and should be passed by reference instead of string name. This will become a hard error in Meson 2.0
../../src/meson.build:3256: WARNING: '/home/cazfi/freeciv/S3_2/builds/mall_33/freeciv-server.6' is a generated file, and should be passed by reference instead of string name. This will become a hard error in Meson 2.0