From 03a3c2c551c838fff356b85e6b5d07b86cc147dd Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Daniel=20Marjam=C3=A4ki?=
 <daniel.marjamaki@cppchecksolutions.com>
Date: Thu, 18 Jun 2026 13:31:36 +0200
Subject: [PATCH 1/2] partial fix #14581 (CI: run 'make test' with some old gcc
 versions)

---
 .github/workflows/gcc-versions.yml | 37 ++++++++++++++++++++++++++++++
 test/testpath.cpp                  |  3 ++-
 2 files changed, 39 insertions(+), 1 deletion(-)
 create mode 100644 .github/workflows/gcc-versions.yml

diff --git a/.github/workflows/gcc-versions.yml b/.github/workflows/gcc-versions.yml
new file mode 100644
index 00000000000..95d8c5743af
--- /dev/null
+++ b/.github/workflows/gcc-versions.yml
@@ -0,0 +1,37 @@
+# the purpose of this github action is to test that cppcheck source code can be compiled using old gcc versions.
+# the gcc images we use here are copied from the official gcc images on docker hub
+
+name: gcc-versions
+
+on:
+  push:
+    branches:
+      - 'main'
+      - 'releases/**'
+      - '2.*'
+    tags:
+      - '2.*'
+  pull_request:
+
+permissions:
+  contents: read
+
+jobs:
+  build:
+
+    strategy:
+      matrix:
+        #image: ["ghcr.io/cppcheck-opensource/gcc:5.4", "ghcr.io/cppcheck-opensource/gcc:6.5", "ghcr.io/cppcheck-opensource/gcc:7.5", "ghcr.io/cppcheck-opensource/gcc:8.5", "ghcr.io/cppcheck-opensource/gcc:9.5"]
+        image: ["ghcr.io/cppcheck-opensource/gcc:5.4"]
+      fail-fast: false
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          persist-credentials: false
+
+      - name: Build cppcheck
+        run: |
+          docker run --rm -v ${{ github.workspace }}:/src -w /src ${{ matrix.image }} make -j$(nproc) CXXOPTS="-Werror" test
diff --git a/test/testpath.cpp b/test/testpath.cpp
index 69ee91fa391..0ebe343685f 100644
--- a/test/testpath.cpp
+++ b/test/testpath.cpp
@@ -516,7 +516,8 @@ class TestPath : public TestFixture {
         ASSERT_EQUALS(expected, Path::getAbsoluteFilePath(Path::join(cwd, "testabspath.txt")));
 
         std::string cwd_up = Path::getPathFromFilename(cwd);
-        cwd_up.pop_back(); // remove trailing slash
+        if (cwd_up != "/")
+            cwd_up.pop_back(); // remove trailing slash
         ASSERT_EQUALS(cwd_up, Path::getAbsoluteFilePath(Path::join(cwd, "..")));
         ASSERT_EQUALS(cwd_up, Path::getAbsoluteFilePath(Path::join(cwd, "../")));
         ASSERT_EQUALS(cwd_up, Path::getAbsoluteFilePath(Path::join(cwd, "..\\")));

From a106b6c65ceb524f0d5044a7ac97b40f453a4789 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Daniel=20Marjam=C3=A4ki?= <daniel.marjamaki@cppcheck.com>
Date: Mon, 13 Jul 2026 17:27:35 +0200
Subject: [PATCH 2/2] temporary simplecpp workaround

---
 .github/workflows/gcc-versions.yml | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/gcc-versions.yml b/.github/workflows/gcc-versions.yml
index 95d8c5743af..3402bade743 100644
--- a/.github/workflows/gcc-versions.yml
+++ b/.github/workflows/gcc-versions.yml
@@ -34,4 +34,6 @@ jobs:
 
       - name: Build cppcheck
         run: |
-          docker run --rm -v ${{ github.workspace }}:/src -w /src ${{ matrix.image }} make -j$(nproc) CXXOPTS="-Werror" test
+          # FIXME: simplecpp-1.8.0 can't be compiled with gcc 5.4, so we can't run 'make test' now
+          #docker run --rm -v ${{ github.workspace }}:/cppcheck -w /cppcheck ${{ matrix.image }} make -j$(nproc) CXXOPTS="-Werror" test
+          docker run --rm -v ${{ github.workspace }}:/cppcheck -w /cppcheck ${{ matrix.image }} g++ -fsyntax-only -Iexternals -Iexternals/picojson -Iexternals/simplecpp -Iexternals/tinyxml2 -std=c++11 -Wno-multichar lib/*.cpp