meson: fix searching for boost

dev-util/meson/meson-0.55.0.recipe

@@ -7,6 +7,7 @@ LICENSE="Apache v2"
 REVISION="1"
 SOURCE_URI="https://github.com/mesonbuild/meson/releases/download/$portVersion/meson-$portVersion.tar.gz"
 CHECKSUM_SHA256="0a1ae2bfe2ae14ac47593537f93290fb79e9b775c55b4c53c282bc3ca3745b35"
+PATCHES="meson-$portVersion.patchset"
 PYTHON_VERSION="3.7"
 
 ARCHITECTURES="any"

dev-util/meson/patches/meson-0.55.0.patchset

@@ -0,0 +1,26 @@
+From a13e7560a5908353b32f7a1151ce0e7ad792316b Mon Sep 17 00:00:00 2001
+From: Adrien Destugues <pulkomandy@pulkomandy.tk>
+Date: Mon, 3 Aug 2020 11:56:45 +0200
+Subject: Fix include path for boost
+
+
+diff --git a/mesonbuild/dependencies/boost.py b/mesonbuild/dependencies/boost.py
+index 907c0c2..ca5ad8a 100644
+--- a/mesonbuild/dependencies/boost.py
++++ b/mesonbuild/dependencies/boost.py
+@@ -491,10 +491,11 @@ class BoostDependency(ExternalDependency):
+ 
+     def detect_inc_dirs(self, root: Path) -> T.List[BoostIncludeDir]:
+         candidates = []  # type: T.List[Path]
+-        inc_root = root / 'include'
++        inc_root = root / 'headers'
+ 
+         candidates += [root / 'boost']
+         candidates += [inc_root / 'boost']
++        candidates += [inc_root / 'x86' / 'boost']
+         if inc_root.is_dir():
+             for i in inc_root.iterdir():
+                 if not i.is_dir() or not i.name.startswith('boost-'):
+-- 
+2.27.0
+