[PATCH] meson: add a backported patch to address vala cross-compilation errors

[Alexander Kanavin <alex.kanavin@gmail.com>]

Signed-off-by: Alexander Kanavin <alex.kanavin@gmail.com>
---
 meta/recipes-devtools/meson/meson.inc         |  1 +
 .../meson/meson/vala-cross-compile.patch      | 50 +++++++++++++++++++
 2 files changed, 51 insertions(+)
 create mode 100644 meta/recipes-devtools/meson/meson/vala-cross-compile.patch

diff --git a/meta/recipes-devtools/meson/meson.inc b/meta/recipes-devtools/meson/meson.inc
index b9a05967f46..662368e2196 100644
--- a/meta/recipes-devtools/meson/meson.inc
+++ b/meta/recipes-devtools/meson/meson.inc
@@ -15,6 +15,7 @@ SRC_URI = "https://github.com/mesonbuild/meson/releases/download/${PV}/meson-${P
            file://0001-mesonbuild-environment.py-do-not-determine-whether-a.patch \
            file://0001-mesonbuild-environment.py-check-environment-for-vari.patch \
            file://0001-modules-python.py-do-not-substitute-python-s-install.patch \
+           file://vala-cross-compile.patch \
            "
 SRC_URI[sha256sum] = "f27b7a60f339ba66fe4b8f81f0d1072e090a08eabbd6aa287683b2c2b9dd2d82"
 SRC_URI[md5sum] = "48787e391ec5c052799a3dd491f73909"
diff --git a/meta/recipes-devtools/meson/meson/vala-cross-compile.patch b/meta/recipes-devtools/meson/meson/vala-cross-compile.patch
new file mode 100644
index 00000000000..816f810c054
--- /dev/null
+++ b/meta/recipes-devtools/meson/meson/vala-cross-compile.patch
@@ -0,0 +1,50 @@
+From 77c3e6a4aaed07e626f4bf4deb7eb66e0f03a33d Mon Sep 17 00:00:00 2001
+From: James Westman <flyingpimonster@flyingpimonster.net>
+Date: Mon, 24 Jun 2019 12:04:12 -0500
+Subject: [PATCH] Fix two errors when cross-compiling with Vala
+
+- AttributeError: 'ValaCompiler' object has no attribute 'get_program_dirs'
+
+  Fixed by adding a `get_program_dirs()` function to the base Compiler
+  class, to match `get_library_dirs()`
+
+- KeyError: 'vala_COMPILER'
+
+  Fixed by creating the Vala compile rules for all machines, not just
+  the build machine.
+
+Upstream-Status: Backport [https://github.com/mesonbuild/meson/commit/77c3e6a4aaed07e626f4bf4deb7eb66e0f03a33d]
+Signed-off-by: Alexander Kanavin <alex.kanavin@gmail.com>
+---
+ mesonbuild/backend/ninjabackend.py | 3 +--
+ mesonbuild/compilers/compilers.py  | 3 +++
+ 2 files changed, 4 insertions(+), 2 deletions(-)
+
+diff --git a/mesonbuild/backend/ninjabackend.py b/mesonbuild/backend/ninjabackend.py
+index a454e6ab5f..b830e377e4 100644
+--- a/mesonbuild/backend/ninjabackend.py
++++ b/mesonbuild/backend/ninjabackend.py
+@@ -1653,8 +1653,7 @@ def generate_compile_rule_for(self, langname, compiler):
+                 self.generate_cs_compile_rule(compiler)
+             return
+         if langname == 'vala':
+-            if self.environment.machines.matches_build_machine(compiler.for_machine):
+-                self.generate_vala_compile_rules(compiler)
++            self.generate_vala_compile_rules(compiler)
+             return
+         if langname == 'rust':
+             self.generate_rust_compile_rules(compiler)
+diff --git a/mesonbuild/compilers/compilers.py b/mesonbuild/compilers/compilers.py
+index 5855de71c8..86c1e33407 100644
+--- a/mesonbuild/compilers/compilers.py
++++ b/mesonbuild/compilers/compilers.py
+@@ -1117,6 +1117,9 @@ def find_library(self, *args, **kwargs):
+     def get_library_dirs(self, *args, **kwargs):
+         return ()
+ 
++    def get_program_dirs(self, *args, **kwargs):
++        return ()
++
+     def has_multi_arguments(self, args, env) -> Tuple[bool, bool]:
+         raise EnvironmentException(
+             'Language {} does not support has_multi_arguments.'.format(
-- 
2.17.1