diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..c965558
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,54 @@
+name: Linux Build Check
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+jobs:
+  build-linux:
+    name: Ubuntu Build (PortAudio v19.6)
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout Code
+        uses: actions/checkout@v4
+
+      - name: Cache APT Packages
+        uses: actions/cache@v4
+        with:
+          path: /var/cache/apt/archives
+          key: ${{ runner.os }}-apt-${{ hashFiles('.github/workflows/linux-build.yml') }}
+          restore-keys: |
+            ${{ runner.os }}-apt-
+
+      - name: Install System Dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y cmake ninja-build \
+            portaudio19-dev libasound2-dev \
+            clang libc++-dev libc++abi-dev ccache
+
+      - name: Setup ccache
+        uses: actions/cache@v4
+        with:
+          path: ~/.cache/ccache
+          key: ${{ runner.os }}-ccache-${{ hashFiles('**/*.c', '**/*.cpp', '**/*.h') }}
+          restore-keys: |
+            ${{ runner.os }}-ccache-
+
+      - name: Configure CMake
+        # Ninja is used for faster build orchestration than standard Make.
+        run: >
+          cmake -B build -G Ninja 
+          -DCMAKE_C_COMPILER_LAUNCHER=ccache
+          -DCMAKE_CXX_COMPILER_LAUNCHER=ccache
+          -DCMAKE_C_COMPILER=clang 
+          -DCMAKE_CXX_COMPILER=clang++ 
+          -DCMAKE_BUILD_TYPE=Release 
+
+      - name: Build Project
+        run: cmake --build build --config Release
+  
+      - name: Show ccache stats
+        run: ccache -s
diff --git a/dev/tabedit/columns5.c b/dev/tabedit/columns5.c
index 1685188..e96c4d7 100755
--- a/dev/tabedit/columns5.c
+++ b/dev/tabedit/columns5.c
@@ -950,7 +950,7 @@ void format_vals(void)
     int n, m, OK = 1;
     double d = (double)cnt/(double)ifactor;
     int rowcnt = cnt/ifactor;
-    char ctemp[64];
+    char ctemp[64] = {0};
 
     errstr[0] = ENDOFSTR;
     if(d > (double)rowcnt)
@@ -998,7 +998,7 @@ void column_format_vals(void)
 
     double d = (double)cnt/(double)ifactor;
     int rowcnt = cnt/ifactor;
-    char ctemp[64];
+    char ctemp[64] = {0};
     errstr[0] = ENDOFSTR;
     if(d > (double)rowcnt)
         rowcnt++;
@@ -2865,7 +2865,7 @@ void format_strs(void)
     int n, m, OK = 1;
     double d = (double)stringscnt/(double)ifactor;
     int rowcnt = stringscnt/ifactor;
-    char ctemp[64];
+    char ctemp[64] = {0};
     errstr[0] = ENDOFSTR;
     if(d > (double)rowcnt)
         rowcnt++;
@@ -2896,7 +2896,7 @@ void column_format_strs(void)
 
     double d = (double)stringscnt/(double)ifactor;
     int rowcnt = stringscnt/ifactor;
-    char ctemp[64];
+    char ctemp[64] = {0};
     errstr[0] = ENDOFSTR;
     if(d > (double)rowcnt)
         rowcnt++;