Failure to build with Xcode 10 / macOS 10.14 Mojave

[fxcoudert]

Discovered during Homebrew testing: Homebrew/homebrew-core#31740

The error is:

$ opam config exec -- make lib9p
vendor/lib9p/request.c:28:10: vendor/lib9p/pack.c:32:10: fatal error: 'stdlib.h' file not found
#include <stdlib.h>
         ^~~~~~~~~~
vendor/lib9p/connection.c:28:10: fatal error: 'stdlib.h' file not found
#include <stdlib.h>
         ^~~~~~~~~~
fatal error: 'stdlib.h' file not found
#include <stdlib.h>
         ^~~~~~~~~~
vendor/lib9p/log.c:28:10: fatal error: 'stdio.h' file not found
#include <stdio.h>
         ^~~~~~~~~
1 error generated.
make: *** [vendor/build/lib9p/log.o] Error 1
make: *** Waiting for unfinished jobs....
1 error generated.
1 error generated.
1 error generated.
make: *** [vendor/build/lib9p/connection.o] Error 1
make: *** [vendor/build/lib9p/request.o] Error 1
make: *** [vendor/build/lib9p/pack.o] Error 1

[Buzzglo]

eagerly awaiting this task

[jelmansouri]

Looks like default Xcode installation through the store doesn't install this package:
/Library/Developer/CommandLineTools/Packages/macOS_SDK_headers_for_macOS_10.14.pkg
Tried compiling the lib independently and installing the package fixes the issue.
(To install do simply do open /Library/Developer/CommandLineTools/Packages/macOS_SDK_headers_for_macOS_10.14.pkg in a terminal)

[jelmansouri]

If you build the driver with qcow2 which is the default, you're gonna get this error:

[ERROR] The compilation of ocaml-system failed at "/private/tmp/docker-machine-driver-xhyve-20181011-14594-10x1d8n/.brew_home/.opam/opam-init/hooks/sandbox.sh build ocaml gen_ocaml_config.ml".

# === ERROR while compiling ocaml-system.4.07.0 ================================#
# context              2.0.0 | macos/x86_64 |  | https://opam.ocaml.org#ebd2104d
# path                 ~/.opam/default/.opam-switch/build/ocaml-system.4.07.0
# command              ~/.opam/opam-init/hooks/sandbox.sh build ocaml gen_ocaml_config.ml
# exit-code            71
# env-file             /private/tmp/opam-jelmansouri-15282/ocaml-system-15282-2c871f.env
# output-file          /private/tmp/opam-jelmansouri-15282/ocaml-system-15282-2c871f.out
###  output ###
# sandbox-exec: sandbox_apply_container: Operation not permitted

The current workaround is to do:
brew install docker-machine-driver-xhyve --without-qcow2