Index: .github/workflows/linux-build.yml
===================================================================
diff -u -N
--- .github/workflows/linux-build.yml	(revision 0)
+++ .github/workflows/linux-build.yml	(revision 02279c61a9831bd4c805e0dbaf6a84c9a1096426)
@@ -0,0 +1,45 @@
+name: Linux
+on: [push]
+jobs:
+  gcc:
+    runs-on: ubuntu-20.04
+    strategy:
+      matrix:
+        cfgopt:
+          - ""
+    defaults:
+      run:
+        shell: bash
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+        with:
+          repository: nm-wu/nsf
+          token: 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
+      - name: Download Tcl tarball
+        run: |
+          curl -L -k -o tcl.tar.gz https://core.tcl-lang.org/tcl/tarball/tcl.tar.gz?uuid=core-8-6-branch
+          tar -xzf tcl.tar.gz
+          ls -la
+      - name: Configure ${{ matrix.cfgopt }}
+        run: |
+          mkdir "${GITHUB_WORKSPACE}/build"
+          ./configure ${CFGOPT} --prefix=${GITHUB_WORKSPACE}/tcl/unix  --exec-prefix=${GITHUB_WORKSPACE}/tcl/unix || (cat config.log && exit 1)
+        working-directory: tcl/unix
+        env:
+          CFGOPT: ${{ matrix.cfgopt }}
+      - name: Build + install
+        run: |
+          make all
+          make install
+        working-directory: tcl/unix
+      - name: Configure ${{ matrix.cfgopt }}
+        run: |
+          ls -la /Users/ssoberni/Documents/dev/nsf/tcl/unix/lib/
+          ls -la ${GITHUB_WORKSPACE}/tcl/unix/lib
+          ./configure ${CFGOPT} --prefix=${GITHUB_WORKSPACE}/build --with-tcl=${GITHUB_WORKSPACE}/tcl/unix/lib || (cat config.log && exit 1)
+        env:
+          CFGOPT: ${{ matrix.cfgopt }}
+      - name: Build + tests
+        run: |
+          make test