From efc55e5baeb09186fc6646f78e5f2c248ae427dc Mon Sep 17 00:00:00 2001
From: Jeroen Ooms <jeroenooms@gmail.com>
Date: Fri, 5 Jun 2026 00:06:09 +0200
Subject: [PATCH] Compile with signed char

---
 .github/workflows/R-CMD-check.yaml | 2 +-
 configure                          | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/R-CMD-check.yaml b/.github/workflows/R-CMD-check.yaml
index 92b45d6..a935b48 100644
--- a/.github/workflows/R-CMD-check.yaml
+++ b/.github/workflows/R-CMD-check.yaml
@@ -2,7 +2,6 @@
 # Need help debugging build failures? Start at https://github.com/r-lib/actions#where-to-find-help
 on:
   push:
-    branches: [main, master]
   pull_request:
     branches: [main, master]
 
@@ -23,6 +22,7 @@ jobs:
           - {os: ubuntu-latest,   r: 'devel', http-user-agent: 'release'}
           - {os: ubuntu-latest,   r: 'release'}
           - {os: ubuntu-latest,   r: 'oldrel-1'}
+          - {os: ubuntu-24.04-arm,   r: 'release'}
 
     env:
       GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
diff --git a/configure b/configure
index f868901..d7cfbde 100755
--- a/configure
+++ b/configure
@@ -24,7 +24,7 @@ fi
 echo "  checking for OS..."
 if test `uname` = "Linux" ; then
   echo "Linux"
-  FLAGS="${FLAGS} -DLINUX"
+  FLAGS="${FLAGS} -DLINUX -fsigned-char"
   LIBS="PKG_LIBS=-lrt -lm"
 #  LIBS="PKG_LIBS=-lrt -lm -luuid"
 elif test `uname` = "SunOS" ; then