Can't open X display

[LucasMW]

time make

cc -Os -std=c99 -pedantic -Wall -Wextra -Wconversion   -c -o schrift.o schrift.c
ar rc libschrift.a schrift.o
ranlib libschrift.a
cc -c -g -Os -std=c99 -pedantic -Wall -Wextra demo.c -o demo.o -I./ -I/usr/include/X11
demo.c:53:9: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
int main()
        ^
         void
1 warning generated.
cc -g -Os demo.o -o demo -L/usr/lib/X11 -L. -lX11 -lXrender -lschrift -lm
ld: warning: search path '/usr/lib/X11' not found
cc -c -g -Os -std=c99 -pedantic -Wall -Wextra stress.c -o stress.o -I./
cc -g -Os stress.o -o stress -L. -lschrift -lm
make  0,66s user 0,42s system 9% cpu 11,749 total

./demo

Can't open X display

Mac OS Sonoma

[marler8997]

Ooof, you've ran into an issue with your X connection and unfortunately libX11 doesn't implement any error handling to tell you what went wrong. In fact I gave a talk that goes into this: https://www.youtube.com/watch?v=aPWFLkHRIAQ&t=730s

You could try checking your DISPLAY environment variable, try other x applications xeyes?, If you want to download the zig compiler you could try running one of my x11 examples in https://github.com/marler8997/zigx (download zig 0.12.0 and run zig run example.zig), and it should give you a nice error message that tells you exactly what's wrong with your X11 setup.