(#25345) cairo: Fix alloca issue in MSVC cairo

recipes/cairo/all/conandata.yml

@@ -14,6 +14,11 @@ sources:
       - "https://mirror.koddos.net/blfs/conglomeration/cairo/cairo-1.17.4.tar.xz"
     sha256: "74b24c1ed436bbe87499179a3b27c43f4143b8676d8ad237a6fa787401959705"
 patches:
+  "1.18.0":
+    - patch_file: "patches/1.18.0-msvc-alloca.patch"
+      patch_type: "backport"
+      patch_description: "Fix alloca undefined with MSVC"
+      patch_source: "https://gitlab.freedesktop.org/cairo/cairo/-/merge_requests/520"
   "1.17.4":
     - patch_file: "patches/binutils-2.34-libbfd-fix.patch"
       patch_type: "backport"

recipes/cairo/all/patches/1.18.0-msvc-alloca.patch

@@ -0,0 +1,28 @@
+From 27cdee5e4cf19e7959b80fe1a39e61188de1b654 Mon Sep 17 00:00:00 2001
+From: Dan Yeaw <dan@yeaw.me>
+Date: Sat, 30 Sep 2023 13:30:51 -0400
+Subject: [PATCH] Fix alloca undefined with MSVC
+
+Conditionally includes malloc.h when compiling with
+MSVC so that alloca is defined.
+---
+ src/cairo-colr-glyph-render.c | 4 ++++
+ 1 file changed, 4 insertions(+)
+
+diff --git a/src/cairo-colr-glyph-render.c b/src/cairo-colr-glyph-render.c
+index 28254fd51..a9ad84bbf 100644
+--- a/src/cairo-colr-glyph-render.c
++++ b/src/cairo-colr-glyph-render.c
+@@ -43,6 +43,10 @@
+ #include <stdio.h>
+ #include <string.h>
+
++#ifdef _MSC_VER
++#include <malloc.h>
++#endif
++
+ #if HAVE_FT_COLR_V1
+
+ #include <ft2build.h>
+-- 
+GitLab