clang -O2  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations tgmath/cproj.c -o tgmath/cproj -D_POSIX_C_SOURCE=202405L  -lm  -lintl
tgmath/cproj.c:1:10: fatal error: 'tgmath.h' file not found
#include <tgmath.h>
         ^
1 error generated.