Freeciv

mac-meson CI job (with a patch to enable werror):

FAILED: [code=1] libfc_client_common.a.p/client_mapview_common.c.o 
cc -Ilibfc_client_common.a.p -I. -I.. -I../dependencies/luasql/src -I../dependencies/tinycthread -I../dependencies/tolua-5.2/include -I../dependencies/cvercmp -I../utility -I../common -I../common/networking -I../common/scriptcore -I../common/aicore -I../client -I../client/include -I../client/luascript -I../client/agents -I/opt/homebrew/include -I/opt/homebrew/Cellar/sdl3_mixer/3.2.4_1/include -I/opt/homebrew/Cellar/opusfile/0.12_3/include/opus -I/opt/homebrew/Cellar/libvorbis/1.3.7/include -I/opt/homebrew/Cellar/game-music-emu/0.6.5/include -I/opt/homebrew/Cellar/libxmp/4.7.4/include -I/opt/homebrew/Cellar/fluid-synth/2.6.1/include -I/opt/homebrew/Cellar/libsndfile/1.2.2_1/include -I/opt/homebrew/Cellar/flac/1.5.0/include -I/opt/homebrew/Cellar/libogg/1.3.6/include -I/opt/homebrew/Cellar/opus/1.6.1/include/opus -I/opt/homebrew/Cellar/mpg123/1.33.7/include -I/opt/homebrew/Cellar/portaudio/19.7.0/include -I/opt/homebrew/Cellar/readline/8.3.6/include -I/opt/homebrew/Cellar/wavpack/5.9.0/include -I/opt/homebrew/include/lua -I/opt/homebrew/opt/gettext/include -I/opt/homebrew/opt/readline/include -fdiagnostics-color=always -Wall -Winvalid-pch -Werror -O0 -g -Wnested-externs -Wmissing-declarations -Wpointer-arith -Wcast-align -Wmissing-prototypes -Wformat -Wformat-security -Wshadow -Wold-style-definition -Wtype-limits -Wimplicit-fallthrough -DHAVE_CONFIG_H -D_DARWIN_C_SOURCE -MD -MQ libfc_client_common.a.p/client_mapview_common.c.o -MF libfc_client_common.a.p/client_mapview_common.c.o.d -o libfc_client_common.a.p/client_mapview_common.c.o -c ../client/mapview_common.c
../client/mapview_common.c:1664:33: error: variable length array folded to constant array as an extension [-Werror,-Wgnu-folding-constant]
 1664 |   struct trade_route_line lines[MAX_TRADE_ROUTE_DRAW_LINES];
      |                                 ^~~~~~~~~~~~~~~~~~~~~~~~~~
1 error generated.