Compile fails on clang 9.0.0

[parkerlreed]

Arch Linux
clang version 9.0.0 (trunk) (llvm/trunk 358753)

clang -Werror -Wall -Wno-unknown-warning-option -Wno-multichar -Wno-int-in-bool-context -std=gnu11 -D_GNU_SOURCE -DVERSION="0.11.1" -I. -D_USE_MATH_DEFINES -Wno-deprecated-declarations -g -DGB_INTERNAL -c Core/timing.c -o build/obj/Core/timing.c.o
clang -Werror -Wall -Wno-unknown-warning-option -Wno-multichar -Wno-int-in-bool-context -std=gnu11 -D_GNU_SOURCE -DVERSION="0.11.1" -I. -D_USE_MATH_DEFINES -Wno-deprecated-declarations -g -c Misc/wide_gb.c -o build/obj/Misc/wide_gb.c.o
Misc/wide_gb.c:154:47: error: format specifies type 'unsigned long long *' but the argument has type 'WGB_exact_hash *' (aka 'unsigned long *') [-Werror,-Wformat]
                sscanf(line, "%llu,%i,%i,%i", &frame_hash, &scene_id, &scene_scroll.x, &scene_scroll.y);
                              ~~~~            ^~~~~~~~~~~
                              %lu
Misc/wide_gb.c:218:57: error: format specifies type 'unsigned long long' but the argument has type 'WGB_exact_hash' (aka 'unsigned long') [-Werror,-Wformat]
                fprintf(frames_file, "%llu,%i,%i,%i\n", scene_frame->frame_hash, scene_frame->scene_id, scene_frame->scene_scroll.x, scene_frame->scene_scroll.y);
                                      ~~~~              ^~~~~~~~~~~~~~~~~~~~~~~
                                      %lu
2 errors generated.
make: *** [Makefile:162: build/obj/Misc/wide_gb.c.o] Error 1

(Thanks for enabling the issue tracker!)

[AntonioND]

I think that this highlights another problem. -Werror shouldn't be used by default when compiling. I imagine that the idea is to force developers to not introduce new warnings, but different versions of compilers may have different warnings, so it isn't realistic to expect that your code is always going to be warning-free.