Add gcc 12 build fixes

Borrowed from Firefox and partly adjusted.

This still does not solve the
"undefined references to `std::__glibcxx_assert_fail"
on f36 (waiting for a gcc 12 fix) but does on f37.

0001-GLIBCXX-fix-for-GCC-12.patch

@@ -0,0 +1,42 @@
+From efd5bc0715e5477318be95a76811cda0a89e8289 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Emilio=20Cobos=20=C3=81lvarez?= <emilio@crisal.io>
+Date: Fri, 4 Mar 2022 12:00:26 +0100
+Subject: [PATCH] GLIBCXX fix for GCC 12?
+
+Borrowed from Firefox and adjusted to Thunderbird 91.7.0
+
+---
+ build/unix/stdc++compat/stdc++compat.cpp | 14 ++++++++++++++
+ 1 file changed, 14 insertions(+)
+
+diff --git a/build/unix/stdc++compat/stdc++compat.cpp b/build/unix/stdc++compat/stdc++compat.cpp
+--- thunderbird-91.7.0/build/unix/stdc++compat/stdc++compat.cpp.0001-GLIBCXX-fix-for-GCC-12	2022-03-07 20:34:15.000000000 +0100
++++ thunderbird-91.7.0/build/unix/stdc++compat/stdc++compat.cpp	2022-03-15 22:50:03.161345590 +0100
+@@ -24,6 +24,7 @@
+    GLIBCXX_3.4.27 is from gcc 10
+    GLIBCXX_3.4.28 is from gcc 10
+    GLIBCXX_3.4.29 is from gcc 11
++   GLIBCXX_3.4.30 is from gcc 12
+ 
+ This file adds the necessary compatibility tricks to avoid symbols with
+ version GLIBCXX_3.4.20 and bigger, keeping binary compatibility with
+@@ -73,6 +74,19 @@ void __attribute__((weak)) __throw_bad_a
+ 
+ }  // namespace std
+ #endif
++
++#if _GLIBCXX_RELEASE >= 12
++namespace std {
++
++/* This avoids the GLIBCXX_3.4.30 symbol version. */
++void __attribute__((weak))
++__glibcxx_assert_fail(const char* __file, int __line, const char* __function,
++                      const char* __condition) {
++  MOZ_CRASH();
++}
++
++}  // namespace std
++#endif
+ 
+ #if MOZ_LIBSTDCXX_VERSION >= GLIBCXX_VERSION(3, 4, 21)
+ /* While we generally don't build with exceptions, we have some host tools

gcc12-D139078.patch

@@ -0,0 +1,94 @@
+diff --git a/gfx/wr/swgl/src/glsl.h b/gfx/wr/swgl/src/glsl.h
+--- a/gfx/wr/swgl/src/glsl.h
++++ b/gfx/wr/swgl/src/glsl.h
+@@ -2301,20 +2301,12 @@
+   const vec2& operator[](int index) const { return data[index]; }
+   mat2() = default;
+ 
+-  IMPLICIT mat2(Float a) {
+-    data[0] = vec2(a);
+-    data[1] = vec2(a);
+-  }
++  IMPLICIT constexpr mat2(Float a) : data{vec2(a), vec2(a)} {}
+ 
+-  mat2(vec2 a, vec2 b) {
+-    data[0] = a;
+-    data[1] = b;
+-  }
++  constexpr mat2(vec2 a, vec2 b) : data{a, b} {}
+   IMPLICIT mat2(const mat4& mat);
+-  IMPLICIT constexpr mat2(mat2_scalar s) {
+-    data[0] = vec2(s.data[0]);
+-    data[1] = vec2(s.data[1]);
+-  }
++  IMPLICIT constexpr mat2(mat2_scalar s)
++      : data{vec2(s.data[0]), vec2(s.data[1])} {}
+ 
+   friend vec2 operator*(mat2 m, vec2 v) {
+     vec2 u;
+@@ -2404,30 +2396,19 @@
+   vec3& operator[](int index) { return data[index]; }
+   const vec3& operator[](int index) const { return data[index]; }
+   mat3() = default;
+-  mat3(vec3 a, vec3 b, vec3 c) {
+-    data[0] = a;
+-    data[1] = b;
+-    data[2] = c;
+-  }
++  constexpr mat3(vec3 a, vec3 b, vec3 c) : data{a, b, c} {}
+ 
+-  IMPLICIT constexpr mat3(mat3_scalar s) {
+-    data[0] = vec3(s.data[0]);
+-    data[1] = vec3(s.data[1]);
+-    data[2] = vec3(s.data[2]);
+-  }
+-  constexpr mat3(mat3_scalar s0, mat3_scalar s1, mat3_scalar s2,
+-                 mat3_scalar s3) {
+-    data[0] = vec3(s0.data[0], s1.data[0], s2.data[0], s3.data[0]);
+-    data[1] = vec3(s0.data[1], s1.data[1], s2.data[1], s3.data[1]);
+-    data[2] = vec3(s0.data[2], s1.data[2], s2.data[2], s3.data[2]);
+-  }
++  IMPLICIT constexpr mat3(mat3_scalar s)
++      : data{vec3(s.data[0]), vec3(s.data[1]), vec3(s.data[2])} {}
++
++  constexpr mat3(mat3_scalar s0, mat3_scalar s1, mat3_scalar s2, mat3_scalar s3)
++      : data{vec3(s0.data[0], s1.data[0], s2.data[0], s3.data[0]),
++             vec3(s0.data[1], s1.data[1], s2.data[1], s3.data[1]),
++             vec3(s0.data[2], s1.data[2], s2.data[2], s3.data[2])} {}
+ 
+   constexpr mat3(Float d1, Float d2, Float d3, Float d4, Float d5, Float d6,
+-                 Float d7, Float d8, Float d9) {
+-    data[0] = vec3(d1, d2, d3);
+-    data[1] = vec3(d4, d5, d6);
+-    data[2] = vec3(d7, d8, d9);
+-  }
++                 Float d7, Float d8, Float d9)
++      : data{vec3(d1, d2, d3), vec3(d4, d5, d6), vec3(d7, d8, d9)} {}
+ 
+   IMPLICIT mat3(const mat4& mat);
+ 
+@@ -2597,19 +2578,11 @@
+   vec4 data[4];
+ 
+   mat4() = default;
+-  IMPLICIT constexpr mat4(mat4_scalar s) {
+-    data[0] = vec4(s.data[0]);
+-    data[1] = vec4(s.data[1]);
+-    data[2] = vec4(s.data[2]);
+-    data[3] = vec4(s.data[3]);
+-  }
++  IMPLICIT constexpr mat4(mat4_scalar s)
++      : data{vec4(s.data[0]), vec4(s.data[1]), vec4(s.data[2]),
++             vec4(s.data[3])} {}
+ 
+-  mat4(vec4 a, vec4 b, vec4 c, vec4 d) {
+-    data[0] = a;
+-    data[1] = b;
+-    data[2] = c;
+-    data[3] = d;
+-  }
++  constexpr mat4(vec4 a, vec4 b, vec4 c, vec4 d) : data{a, b, c, d} {}
+ 
+   vec4& operator[](int index) { return data[index]; }
+   const vec4& operator[](int index) const { return data[index]; }
+

gcc12-D139088.patch

@@ -0,0 +1,13 @@
+diff --git a/gfx/wr/swgl/src/gl.cc b/gfx/wr/swgl/src/gl.cc
+--- a/gfx/wr/swgl/src/gl.cc
++++ b/gfx/wr/swgl/src/gl.cc
+@@ -82,7 +82,7 @@
+ 
+ #define FALLTHROUGH [[fallthrough]]
+ 
+-#ifdef MOZILLA_CLIENT
++#if defined(MOZILLA_CLIENT) && defined(MOZ_CLANG_PLUGIN)
+ #  define IMPLICIT __attribute__((annotate("moz_implicit")))
+ #else
+ #  define IMPLICIT
+

thunderbird.spec

@@ -118,6 +118,10 @@ Patch416:       firefox-SIOCGSTAMP.patch
 Patch418:       mozilla-1512162.patch
 Patch419:       bindgen-d0dfc52706f23db9dc9d74642eeebd89d73cb8d0.patch
 Patch103:       rhbz-1219542-s390-build.patch
+# gcc 12 build fix patches
+Patch420:       gcc12-D139078.patch
+Patch421:       gcc12-D139088.patch
+Patch422:       0001-GLIBCXX-fix-for-GCC-12.patch
 
 # PPC fix
 Patch304:       mozilla-1245783.patch
@@ -296,6 +300,10 @@ debug %{name}, you want to install %{name}-debuginfo instead.
 pushd comm
 popd
 
+%patch420 -p1 -b .gcc12-D139078
+%patch421 -p1 -b .gcc12-D139088
+%patch422 -p1 -b .0001-GLIBCXX-fix-for-GCC-12
+
 %patch501 -p1 -b .expat-CVE-2022-25235
 %patch502 -p1 -b .expat-CVE-2022-25236
 %patch503 -p1 -b .expat-CVE-2022-25315