Revert "zmake: Use vpython3 in cmake"

This reverts commit 338b2fa082a886c6134ca67586d38a83bd49fe6a.

Reason for revert: Breaks in emerge.

Original change's description:
> zmake: Use vpython3 in cmake
>
> Add cmake variable to force it to use vpython3 instead of auto-detecting
> the path to python.  This is slightly fragile due to logic in
> zephyr/main/cmake/modules/python.cmake. You can pass in PYTHON_PREFER
> but it will extract the version from that binary and run
> /usr/bin/python${ver}, which is very strange. Pass Python3_EXECUTABLE
> to bypass all of that logic, but it has to be exactly the version in
> PYTHON_MINIMUM_REQUIRED or it will fail. We'll need to make sure we keep
> the vpython version matched with PYTHON_MINIMUM_REQUIRED in the future.
>
> Update the instructions to run ram_report because it works inside the
> chroot now.
>
> Added some missing packages to twister_launcher.py as well. I'm not sure
> why this change made them start to be required, but they are.
>
> BRANCH=None
> BUG=b:243936551
> TEST=zmake build -a
>
> Cq-Depend: chromium:3892212
> Signed-off-by: Jeremy Bettis <jbettis@google.com>
> Change-Id: Ied285ce0b69b33a9a3b016c4bd07cab0b6a13b89
> Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3891670
> Commit-Queue: Jeremy Bettis <jbettis@chromium.org>
> Commit-Queue: Keith Short <keithshort@chromium.org>
> Auto-Submit: Jeremy Bettis <jbettis@chromium.org>
> Tested-by: Jeremy Bettis <jbettis@chromium.org>
> Reviewed-by: Keith Short <keithshort@chromium.org>

Bug: b:243936551
Change-Id: I88341eb47bf15c90d4d050e11b08e74f72f52e58
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3891683
Commit-Queue: Jonathon Murphy <jpmurphy@google.com>
Tested-by: Jonathon Murphy <jpmurphy@google.com>
Reviewed-by: Jonathon Murphy <jpmurphy@google.com>
Owners-Override: Jonathon Murphy <jpmurphy@google.com>

1 files changed, 30 insertions, 25 deletions

diff --git a/zephyr/zmake/zmake/zmake.py b/zephyr/zmake/zmake/zmake.py
index 4cc3e3ea34..d7af2575bf 100644
--- a/zephyr/zmake/zmake/zmake.py
+++ b/zephyr/zmake/zmake/zmake.py
@@ -1,4 +1,4 @@
-# Copyright 2020 The ChromiumOS Authors
+# Copyright 2020 The Chromium OS Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
@@ -391,31 +391,36 @@ class Zmake:
                 shutil.rmtree(build_dir)
 
             generated_include_dir = (build_dir / "include").resolve()
-            cmake_defs = {
-                "CMAKE_EXPORT_COMPILE_COMMANDS": "ON",
-                "DTS_ROOT": str(self.module_paths["ec"] / "zephyr"),
-                "SYSCALL_INCLUDE_DIRS": str(
-                    self.module_paths["ec"] / "zephyr" / "include" / "drivers"
-                ),
-                "USER_CACHE_DIR": str(
-                    self.module_paths["ec"] / "build" / "zephyr" / "user-cache"
-                ),
-                "ZEPHYR_BASE": str(self.zephyr_base),
-                "ZMAKE_INCLUDE_DIR": str(generated_include_dir),
-                "ZMAKE_PROJECT_NAME": project.config.project_name,
-                **(
-                    {"EXTRA_EC_VERSION_FLAGS": "--static"}
-                    if static_version
-                    else {}
-                ),
-                **({"EXTRA_CFLAGS": "-save-temps=obj"} if save_temps else {}),
-            }
-            vpython = shutil.which("vpython3")
-            if vpython:
-                cmake_defs["Python3_EXECUTABLE"] = vpython
-
             base_config = zmake.build_config.BuildConfig(
-                cmake_defs=cmake_defs,
+                cmake_defs={
+                    "CMAKE_EXPORT_COMPILE_COMMANDS": "ON",
+                    "DTS_ROOT": str(self.module_paths["ec"] / "zephyr"),
+                    "SYSCALL_INCLUDE_DIRS": str(
+                        self.module_paths["ec"]
+                        / "zephyr"
+                        / "include"
+                        / "drivers"
+                    ),
+                    "USER_CACHE_DIR": str(
+                        self.module_paths["ec"]
+                        / "build"
+                        / "zephyr"
+                        / "user-cache"
+                    ),
+                    "ZEPHYR_BASE": str(self.zephyr_base),
+                    "ZMAKE_INCLUDE_DIR": str(generated_include_dir),
+                    "ZMAKE_PROJECT_NAME": project.config.project_name,
+                    **(
+                        {"EXTRA_EC_VERSION_FLAGS": "--static"}
+                        if static_version
+                        else {}
+                    ),
+                    **(
+                        {"EXTRA_CFLAGS": "-save-temps=obj"}
+                        if save_temps
+                        else {}
+                    ),
+                },
             )
 
             # Prune the module paths to just those required by the project.