🚑 Disable LTO by default for 14

.github/workflows/semantic-release.yml

@@ -0,0 +1,46 @@
+# Copyright 2024 - 2025 Khalil Estell and the libhal contributors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+name: 🏷️ Semantic Release
+on:
+  push:
+    branches: [main]
+
+permissions:
+  contents: write
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - name: Version
+        id: version
+        uses: paulhatch/semantic-version@v5.4.0
+        with:
+          bump_each_commit: true
+          major_pattern: "(major)"
+          minor_pattern: "(minor)"
+          bump_each_commit_patch_pattern: "(patch)"
+          tag_prefix: ""
+          debug: true
+      - name: Release
+        if: steps.version.outputs.version_type != 'none'
+        run: |
+          gh release create ${{ steps.version.outputs.version_tag }} \
+            --generate-notes
+        env:
+          GITHUB_TOKEN: ${{ secrets.SEMANTIC_RELEASE }}

README.md

@@ -60,6 +60,22 @@ Missing Architectures:
 All binaries are downloaded from the official
 [ARM GNU Toolchain Download Page](https://developer.arm.com/downloads/-/arm-gnu-toolchain-downloads).
 
+> [!WARNING]
+>
+> LTO is disabled for ARM GCC 14.x. From testing, it seems that LTO compression
+> support for ZSTD is enabled for Linux (maybe Windows too), but not for Mac.
+> This results in the following error when Linux built binaries are used on a
+> mac build:
+>
+> ```plaintext
+> lto1: fatal error: compiler does not support ZSTD LTO compression
+> compilation terminated.
+> lto-wrapper: fatal error: bin/arm-none-eabi-g++ returned 1 exit status
+> compilation terminated. arm-none-eabi/bin/ld: error: lto-wrapper failed
+> collect2: error: ld returned 1 exit status
+> ninja: build stopped: subcommand failed.
+> ```
+
 ## 🚀 Quick Start
 
 To use the ARM GNU Toolchain for your application, you should install the

all/conanfile.py

@@ -2,6 +2,7 @@
 from conan import ConanFile
 from conan.tools.files import get, copy
 from conan.errors import ConanInvalidConfiguration
+from conan.tools.scm import Version
 
 
 required_conan_version = ">=2.0.0"
@@ -38,7 +39,7 @@ class ArmGnuToolchain(ConanFile):
     default_options = {
         "local_path": "",
         "default_arch": True,
-        "lto": True,
+        # "lto" default set in config_options()
         "fat_lto": True,
         "function_sections": True,
         "data_sections": True,
@@ -65,6 +66,20 @@ class ArmGnuToolchain(ConanFile):
     def _settings_build(self):
         return getattr(self, "settings_build", self.settings)
 
+    def config_options(self):
+        """Set LTO default based on compiler version"""
+        # Disable LTO for GCC 14 due to ZSTD compression incompatibilities
+        # between different build environments (Linux/macOS/Windows)
+        if self.settings_target:
+            COMPILER_VERSION = str(
+                self.settings_target.get_safe("compiler.version", ""))
+            if COMPILER_VERSION.startswith("14"):
+                self.output.debug("‼️ DISABLING LTO FOR GCC 14 ‼️")
+                self.options.lto = False
+            else:
+                self.output.debug("✅ USING LTO FOR GCC")
+                self.options.lto = True
+
     def validate(self):
         supported_build_operating_systems = ["Linux", "Macos", "Windows"]
         if not self._settings_build.os in supported_build_operating_systems: