From b5378839ef992d8c908bbe22444ecf9431c06651 Mon Sep 17 00:00:00 2001
From: Dan Bonachea <dobonachea@lbl.gov>
Date: Thu, 23 Apr 2026 12:49:57 -0700
Subject: [PATCH 1/3] CI: Add LFortran v0.63

---
 .github/workflows/build.yml | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index c7d1c47..9313796 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -108,7 +108,17 @@ jobs:
             container: phhargrove/lfortran:0.62.0-1
             extra_flags: --separate-compilation --realloc-lhs-arrays
 
+          - os: ubuntu-24.04
+            compiler: lfortran
+            version: 0.63.0
+            container: phhargrove/lfortran:0.63.0-1
+
           # https://github.com/lfortran/lfortran/pkgs/container/lfortran
+          - os: ubuntu-22.04
+            compiler: lfortran
+            version: 0.63.0
+            container: ghcr.io/lfortran/lfortran:v0.63.0
+
           - os: ubuntu-22.04
             compiler: lfortran
             version: latest

From 0211ebc1b73745e5249024d0f5e29ce881063291 Mon Sep 17 00:00:00 2001
From: Dan Bonachea <dobonachea@lbl.gov>
Date: Thu, 23 Apr 2026 18:12:44 -0700
Subject: [PATCH 2/3] CI: Factor the LFortran options

---
 .github/workflows/build.yml | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 9313796..1907acc 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -101,13 +101,10 @@ jobs:
             compiler: lfortran
             version: 0.61.0
             container: phhargrove/lfortran:0.61.0-1
-            extra_flags: --separate-compilation --realloc-lhs-arrays
           - os: ubuntu-24.04
             compiler: lfortran
             version: 0.62.0
             container: phhargrove/lfortran:0.62.0-1
-            extra_flags: --separate-compilation --realloc-lhs-arrays
-
           - os: ubuntu-24.04
             compiler: lfortran
             version: 0.63.0
@@ -118,12 +115,10 @@ jobs:
             compiler: lfortran
             version: 0.63.0
             container: ghcr.io/lfortran/lfortran:v0.63.0
-
           - os: ubuntu-22.04
             compiler: lfortran
             version: latest
             container: ghcr.io/lfortran/lfortran:latest
-            extra_flags: --separate-compilation --realloc-lhs-arrays
 
     container:
       image: ${{ matrix.container }}
@@ -213,7 +208,7 @@ jobs:
           fi ; \
         elif test "$FC" = "lfortran" ; then \
           echo "FPM_FC=lfortran" >> "$GITHUB_ENV" ; \
-          echo "FFLAGS=--cpp $FFLAGS" >> "$GITHUB_ENV" ; \
+          echo "FFLAGS=--cpp --separate-compilation --realloc-lhs-arrays $FFLAGS" >> "$GITHUB_ENV" ; \
           echo "FPM_FLAGS=--profile debug --verbose" >> "$GITHUB_ENV" ; : fpm 0.13 workaround ; \
         else \
           echo "FPM_FC=gfortran-${COMPILER_VERSION}" >> "$GITHUB_ENV" ; \

From 2ba072a19d9bc65b1cbe06505d39a643a7826f5b Mon Sep 17 00:00:00 2001
From: Dan Bonachea <dobonachea@lbl.gov>
Date: Thu, 23 Apr 2026 18:16:10 -0700
Subject: [PATCH 3/3] CI: Deploy concurrency and path filtering for Action
 activation

Reduce unnecessary churn by skipping CI Action for documentation-only
changes.

Also, avoid duplicate Actions on pushes to PR branches (which trigger
both the `push` and `pull_request` events).

Finally, cancel earlier Actions still running when a non-main branch is
updated, as these are usually unneeded, and the superceded Action can even
cause spurious failures after a subsequent force push orphans the source commit.
---
 .github/workflows/build.yml | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 1907acc..5719f1c 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -1,6 +1,18 @@
 name: Build
 
-on: [push, pull_request]
+on:
+  push:
+    paths-ignore: &paths_ignore
+      - 'doc/**'
+      - '**.txt'
+      - '**.md'
+  pull_request:
+    paths-ignore: *paths_ignore
+
+concurrency:
+  # De-duplicate concurrent workflow runs on the same branch/ref
+  group: ${{ github.workflow }}-${{ github.head_ref || github.ref_name }}
+  cancel-in-progress: ${{ github.ref != 'refs/heads/main' }}
 
 defaults:
   run: