clang -O2  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations stdlib/secure_getenv.c -o stdlib/secure_getenv -D_POSIX_C_SOURCE=202405L  -lm  -lintl
stdlib/secure_getenv.c:5:30: error: use of undeclared identifier 'secure_getenv'
char *(*foo)(const char *) = secure_getenv;
                             ^
1 error generated.