From 87d4f6d176f27c22dbb99abc271b9a6eaca314f8 Mon Sep 17 00:00:00 2001
From: Alexander Kanavin <alex.kanavin@gmail.com>
Date: Fri, 22 Jul 2022 20:39:15 +0200
Subject: [PATCH] meson: provide relocation script and native/cross wrappers
 also for meson-native

When using meson-native directly from bitbake this has no effect and
everything works as before; the use case is being able to build
meson-driven projects from the 'direct SDK' environment. Build systems
like cmake/autotools are entirely driven by environment variables,
but meson needs configuration files, and so this replicates how SDKs
set things up.

In particular, with this change the libepoxy build test from the SDK
test suite is able to pass.

Signed-off-by: Alexander Kanavin <alex@linutronix.de>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
---
 .../meson/meson/meson-wrapper                 |  2 +-
 meta/recipes-devtools/meson/meson_0.63.0.bb   | 34 ++++++++++++++++---
 2 files changed, 30 insertions(+), 6 deletions(-)

diff --git a/meta/recipes-devtools/meson/meson/meson-wrapper b/meta/recipes-devtools/meson/meson/meson-wrapper
index 8fafaad9754..c62007f5077 100755
--- a/meta/recipes-devtools/meson/meson/meson-wrapper
+++ b/meta/recipes-devtools/meson/meson/meson-wrapper
@@ -1,7 +1,7 @@
 #!/bin/sh
 
 if [ -z "$OECORE_NATIVE_SYSROOT" ]; then
-    echo "OECORE_NATIVE_SYSROOT not set; are you in a Yocto SDK environment?" >&2
+    exec "meson.real" "$@"
 fi
 
 if [ -z "$SSL_CERT_DIR" ]; then
diff --git a/meta/recipes-devtools/meson/meson_0.63.0.bb b/meta/recipes-devtools/meson/meson_0.63.0.bb
index 42e64e351fe..890f47506f4 100644
--- a/meta/recipes-devtools/meson/meson_0.63.0.bb
+++ b/meta/recipes-devtools/meson/meson_0.63.0.bb
@@ -75,7 +75,7 @@ def generate_native_link_template(d):
 
     return repr(val)
 
-do_install:append:class-nativesdk() {
+install_templates() {
     install -d ${D}${datadir}/meson
 
     cat >${D}${datadir}/meson/meson.native.template <<EOF
@@ -117,11 +117,19 @@ needs_exe_wrapper = true
 sys_root = @OECORE_TARGET_SYSROOT
 
 [host_machine]
-system = '${SDK_OS}'
-cpu_family = '${@meson_cpu_family("SDK_ARCH", d)}'
-cpu = '${SDK_ARCH}'
-endian = '${@meson_endian("SDK", d)}'
+system = '$host_system'
+cpu_family = '$host_cpu_family'
+cpu = '$host_cpu'
+endian = '$host_endian'
 EOF
+}
+
+do_install:append:class-nativesdk() {
+    host_system=${SDK_OS}
+    host_cpu_family=${@meson_cpu_family("SDK_ARCH", d)}
+    host_cpu=${SDK_ARCH}
+    host_endian=${@meson_endian("SDK", d)}
+    install_templates
 
     install -d ${D}${SDKPATHNATIVE}/post-relocate-setup.d
     install -m 0755 ${WORKDIR}/meson-setup.py ${D}${SDKPATHNATIVE}/post-relocate-setup.d/
@@ -132,3 +140,19 @@ EOF
 }
 
 FILES:${PN}:append:class-nativesdk = "${datadir}/meson ${SDKPATHNATIVE}"
+
+do_install:append:class-native() {
+    host_system=${HOST_OS}
+    host_cpu_family=${@meson_cpu_family("HOST_ARCH", d)}
+    host_cpu=${HOST_ARCH}
+    host_endian=${@meson_endian("HOST", d)}
+    install_templates
+
+    install -d ${D}${datadir}/post-relocate-setup.d
+    install -m 0755 ${WORKDIR}/meson-setup.py ${D}${datadir}/post-relocate-setup.d/
+
+    # We need to wrap the real meson with a thin wrapper that substitues native/cross files
+    # when running in a direct SDK environment.
+    mv ${D}${bindir}/meson ${D}${bindir}/meson.real
+    install -m 0755 ${WORKDIR}/meson-wrapper ${D}${bindir}/meson
+}
-- 
2.47.2