From aabb846b165fec218024a7a57f3c9fdaa2514179 Mon Sep 17 00:00:00 2001
From: Martin Kelly <mkelly@xevo.com>
Date: Mon, 4 Jun 2018 16:06:02 -0700
Subject: meson: enable nativesdk

Currently, we can't build meson into SDKs because we don't autogenerate
the required meson.cross file.

Enable this by using the post-relocate hooks and generating a
meson.cross file based on the SDK environment passed into the
post-relocate hook.

Signed-off-by: Martin Kelly <mkelly@xevo.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
---
 meta/recipes-devtools/meson/meson/meson-setup.py | 62 ++++++++++++++++++++++++
 meta/recipes-devtools/meson/meson/meson-wrapper  | 14 ++++++
 2 files changed, 76 insertions(+)
 create mode 100755 meta/recipes-devtools/meson/meson/meson-setup.py
 create mode 100755 meta/recipes-devtools/meson/meson/meson-wrapper

(limited to 'meta/recipes-devtools/meson/meson')

diff --git a/meta/recipes-devtools/meson/meson/meson-setup.py b/meta/recipes-devtools/meson/meson/meson-setup.py
new file mode 100755
index 0000000000..a9749eae9d
--- /dev/null
+++ b/meta/recipes-devtools/meson/meson/meson-setup.py
@@ -0,0 +1,62 @@
+#!/usr/bin/env python3
+
+import os
+import sys
+
+def bail(msg):
+    print(msg, file=sys.stderr)
+    sys.exit(1)
+
+_MARKER = '@@'
+def transform_line(line):
+    # Substitute any special markers of this form:
+    # @@ENV@@
+    # with the value of ENV, split into meson array syntax.
+    start = line.find(_MARKER)
+    if start == -1:
+        return line
+
+    end = line.rfind(_MARKER)
+    if end == start:
+        return line
+
+    # Lookup value of the env var.
+    var = line[start+len(_MARKER):end]
+    try:
+        val = os.environ[var]
+    except KeyError:
+        bail('cannot generate meson.cross; env var %s not set' % var)
+
+    # Transform into meson array.
+    val = ["'%s'" % x for x in val.split()]
+    val = ', '.join(val)
+    val = '[%s]' % val
+
+    before = line[:start]
+    after = line[end+len(_MARKER):]
+
+    return '%s%s%s' % (before, val, after)
+
+# Make sure this is really an SDK extraction environment.
+try:
+    sysroot = os.environ['OECORE_NATIVE_SYSROOT']
+except KeyError:
+    bail('OECORE_NATIVE_SYSROOT env var must be set')
+
+cross_file = os.path.join(sysroot, 'usr/share/meson/meson.cross')
+tmp_cross_file = '%s.tmp' % cross_file
+
+# Read through and transform the current meson.cross.
+lines = []
+with open(cross_file, 'r') as f:
+    for line in f:
+        lines.append(transform_line(line))
+
+# Write the transformed result to a tmp file and atomically rename it. In case
+# we crash during the file write, we don't want an invalid meson.cross file.
+with open(tmp_cross_file, 'w') as f:
+    for line in lines:
+        f.write(line)
+    f.flush()
+    os.fdatasync(f.fileno())
+os.rename(tmp_cross_file, cross_file)
diff --git a/meta/recipes-devtools/meson/meson/meson-wrapper b/meta/recipes-devtools/meson/meson/meson-wrapper
new file mode 100755
index 0000000000..b2e00da513
--- /dev/null
+++ b/meta/recipes-devtools/meson/meson/meson-wrapper
@@ -0,0 +1,14 @@
+#!/bin/sh
+
+if [ -z "$OECORE_NATIVE_SYSROOT" ]; then
+    echo "OECORE_NATIVE_SYSROOT not set; are you in a Yocto SDK environment?" >&2
+fi
+
+# If these are set to a cross-compile path, meson will get confused and try to
+# use them as native tools. Unset them to prevent this, as all the cross-compile
+# config is already in meson.cross.
+unset CC CXX CPP LD AR NM STRIP
+
+exec "$OECORE_NATIVE_SYSROOT/usr/bin/meson.real" \
+     --cross-file "$OECORE_NATIVE_SYSROOT/usr/share/meson/meson.cross" \
+     "$@"
-- 
cgit 1.2.3-korg