# DF-2894 build output (guest /usr/bin/cc, unprivileged user maxx)
$ cc -O2 -o /tmp/df2894_trigger /tmp/df2894_trigger.c
/tmp/df2894_trigger.c: In function 'main':
/tmp/df2894_trigger.c:9:6: warning: implicit declaration of function 'kenv'; did you mean 'putenv'? [-Wimplicit-function-declaration]
  r = kenv(0, name, buf, sizeof(buf) - 1);
      ^~~~
      putenv
$ ls -l /tmp/df2894_trigger
-rwxr-xr-x  1 maxx  wheel  7336 Sep  2 22:49 /tmp/df2894_trigger
BUILD_OK
(kenv(3) is exported by libc; the implicit-declaration warning is cosmetic —
 the int-returning ABI matches.)