From d77249b5cccd9caab5f7f9f7c8435418b3417448 Mon Sep 17 00:00:00 2001
From: dragonmux <git@dragonmux.network>
Date: Fri, 29 Sep 2023 01:44:35 +0100
Subject: [PATCH 1/2] gha/macos: Switched LTO off for the Homebrew builds to
 avoid GCC bug #111635

---
 .github/workflows/build-macos.yml | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/.github/workflows/build-macos.yml b/.github/workflows/build-macos.yml
index 98e3088..d083cbd 100644
--- a/.github/workflows/build-macos.yml
+++ b/.github/workflows/build-macos.yml
@@ -94,7 +94,6 @@ jobs:
     # rdar://FB11369327
     name: '${{ matrix.os }} (homebrew, ${{ matrix.compiler }})'
     runs-on: ${{ matrix.os }}
-    if: false
     defaults:
       run:
         shell: bash
@@ -144,7 +143,8 @@ jobs:
           meson --version
           ninja --version
       - name: Configure
-        run: meson setup build --prefix=$HOME/.local $BUILD_OPTS
+        # GCC on macOS cannot do LTO for now due to https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111635
+        run: meson setup build --prefix=$HOME/.local -Db_lto=false $BUILD_OPTS
       - name: Build
         run: meson compile -C build
       - name: Test
@@ -156,7 +156,7 @@ jobs:
         # Codecov no longer parses gcov files automatically
         run: |
           rm -rf build
-          meson setup build --prefix=$HOME/.local -Db_coverage=true --buildtype=debug
+          meson setup build --prefix=$HOME/.local -Db_lto=false -Db_coverage=true --buildtype=debug $BUILD_OPTS
           meson compile -C build
           meson test -C build
           ninja -C build coverage-xml

From ff8ce598d5e420d8758416a76727b45c26cd93cf Mon Sep 17 00:00:00 2001
From: dragonmux <git@dragonmux.network>
Date: Fri, 29 Sep 2023 01:54:26 +0100
Subject: [PATCH 2/2] meson: Implemented a guard for LTO on macOS w/ GCC as
 this is broken

---
 src/meson.build | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/meson.build b/src/meson.build
index 0c8de63..9222516 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -3,6 +3,13 @@
 # SPDX-FileContributor: Written by Rachel Mant <git@dragonmux.network>
 cxx = meson.get_compiler('cpp')
 
+if get_option('b_lto') and host_machine.system() == 'darwin' and cxx.get_id() == 'gcc'
+	error(
+		'GCC on macOS does not correctly implement support for LTO, please pass `-Db_lto=false` to Meson\n',
+		'-> See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111635 for details'
+	)
+endif
+
 if cxx.get_id() == 'msvc' and cxx.version().version_compare('<19.37')
 	error('Your compiler is broken, please upgrade to at least MSVC 2022 release 17.7 to build bmpflash with MSVC.')
 endif