meson: apply libplacebo patch to suppress some warnings

meson.build

@@ -2,7 +2,7 @@ project('mpv',
         'c',
         license: ['GPL2+', 'LGPL2.1+'],
         version: files('./VERSION'),
-        meson_version: '>=0.62.0',
+        meson_version: '>=0.63.0',
         default_options: [
             'buildtype=debugoptimized',
             'b_lundef=false',

subprojects/libplacebo.wrap

@@ -4,3 +4,4 @@ url = https://code.videolan.org/videolan/libplacebo.git
 revision = v6.338.1
 depth = 1
 clone-recursive = true
+diff_files = mr_616.patch

subprojects/packagefiles/mr_616.patch

@@ -0,0 +1,67 @@
+From a75d059fbe085709c840d16b2037b53d384d9dcc Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Kacper=20Michaj=C5=82ow?= <[email protected]>
+Date: Mon, 23 Oct 2023 14:59:19 +0200
+Subject: [PATCH 1/2] log: suppress maybe-uninitialized warning false positive
+
+This will never be used uninitialized, guarded by use_dbghelp, but GCC
+analysis is too shallow and fails to see that.
+---
+ src/log.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/src/log.c b/src/log.c
+index d43f41749..0829dd3d3 100644
+--- a/src/log.c
++++ b/src/log.c
+@@ -281,7 +281,7 @@ void pl_log_stack_trace(pl_log log, enum pl_log_level lev)
+     HANDLE process = GetCurrentProcess();
+     HMODULE dbghelp = LoadLibrary("dbghelp.dll");
+     DWORD options;
+-    SYMBOL_INFO *symbol;
++    SYMBOL_INFO *symbol = NULL;
+     BOOL use_dbghelp = !!dbghelp;
+
+ #define DBGHELP_SYM(sym)                                                        \
+-- 
+GitLab
+
+
+From 5c03d91ba5696c62b85bf37fefafca4733acf91a Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Kacper=20Michaj=C5=82ow?= <[email protected]>
+Date: Mon, 23 Oct 2023 15:02:06 +0200
+Subject: [PATCH 2/2] shaders/custom: suppress -Werror=stringop-overflow= false
+ positives
+
+GCC is confused...
+---
+ src/shaders/custom_mpv.c | 7 +++++++
+ 1 file changed, 7 insertions(+)
+
+diff --git a/src/shaders/custom_mpv.c b/src/shaders/custom_mpv.c
+index 4ef08178b..b9f71720b 100644
+--- a/src/shaders/custom_mpv.c
++++ b/src/shaders/custom_mpv.c
+@@ -230,6 +230,10 @@ static bool parse_hook(pl_log log, pl_str *body, struct custom_shader_hook *out)
+             continue;
+         }
+
++#if defined(__GNUC__) && !defined(__clang__)
++# pragma GCC diagnostic push
++# pragma GCC diagnostic ignored "-Wstringop-overflow="
++#endif
+         if (pl_str_eatstart0(&line, "WIDTH")) {
+             if (!parse_rpn_shexpr(line, out->width)) {
+                 pl_err(log, "Error while parsing WIDTH!");
+@@ -253,6 +257,9 @@ static bool parse_hook(pl_log log, pl_str *body, struct custom_shader_hook *out)
+             }
+             continue;
+         }
++#if defined(__GNUC__) && !defined(__clang__)
++# pragma GCC diagnostic pop
++#endif
+
+         if (pl_str_eatstart0(&line, "COMPONENTS")) {
+             if (!pl_str_parse_int(pl_str_strip(line), &out->comps)) {
+-- 
+GitLab
+