CI: Install docbook-xsl where documentation is built

If docbook-xsl is installed, the xsltproc command reads stylesheets
from local files instead of from http://docbook.sourceforge.net.
Faster and safer. Reading from docbook.sourceforge.net sometimes fails.

Remove test with g++-7.

9 files changed, 8 insertions, 33 deletions

diff --git a/.github/workflows/autotools-clang-10.yml b/.github/workflows/autotools-clang-10.yml
index a398b3a..9d6263a 100644
--- a/.github/workflows/autotools-clang-10.yml
+++ b/.github/workflows/autotools-clang-10.yml
@@ -14,7 +14,7 @@ jobs:
         # Prevent blocking apt install on a question during configuring of tzdata.
         export ENV DEBIAN_FRONTEND=noninteractive
         sudo apt update
-        sudo apt install mm-common clang-10 make --yes
+        sudo apt install mm-common clang-10 make docbook-xsl --yes
         export CC=clang-10 CXX=clang++-10
         ./autogen.sh --enable-warnings=fatal
         make
diff --git a/.github/workflows/autotools-clang-8.yml b/.github/workflows/autotools-clang-8.yml
index 78914b5..908e2f8 100644
--- a/.github/workflows/autotools-clang-8.yml
+++ b/.github/workflows/autotools-clang-8.yml
@@ -12,7 +12,7 @@ jobs:
     - name: Build
       run: |
         sudo apt update
-        sudo apt install mm-common clang-8
+        sudo apt install mm-common clang-8 docbook-xsl
         export CXX=clang++-8
         ./autogen.sh --enable-warnings=fatal
         make
diff --git a/.github/workflows/autotools-clang-9.yml b/.github/workflows/autotools-clang-9.yml
index b9b2f5c..9a0dae7 100644
--- a/.github/workflows/autotools-clang-9.yml
+++ b/.github/workflows/autotools-clang-9.yml
@@ -14,7 +14,7 @@ jobs:
         # Prevent blocking apt install on a question during configuring of tzdata.
         export ENV DEBIAN_FRONTEND=noninteractive
         sudo apt update
-        sudo apt install mm-common clang-9 make --yes
+        sudo apt install mm-common clang-9 make docbook-xsl --yes
         export CC=clang-9 CXX=clang++-9
         ./autogen.sh --enable-warnings=fatal
         make
diff --git a/.github/workflows/autotools-gcc-10.yml b/.github/workflows/autotools-gcc-10.yml
index 2082f4f..1f601b0 100644
--- a/.github/workflows/autotools-gcc-10.yml
+++ b/.github/workflows/autotools-gcc-10.yml
@@ -12,7 +12,7 @@ jobs:
     - name: Build
       run: |
         sudo apt update
-        sudo apt install mm-common g++-10
+        sudo apt install mm-common g++-10 docbook-xsl
         export CXX=g++-10
         ./autogen.sh --enable-warnings=fatal
         make
diff --git a/.github/workflows/autotools-gcc-7.yml b/.github/workflows/autotools-gcc-7.yml
deleted file mode 100644
index 826efa7..0000000
--- a/.github/workflows/autotools-gcc-7.yml
+++ /dev/null
@@ -1,25 +0,0 @@
-name: "CI: autotools: gcc 7"
-
-on: [push]
-
-jobs:
-  build:
-
-    runs-on: ubuntu-18.04
-
-    steps:
-    - uses: actions/checkout@v1
-    - name: Build
-      run: |
-        sudo apt update
-        sudo apt install mm-common g++-7
-        export CXX=g++-7
-        ./autogen.sh --enable-warnings=fatal
-        make
-    - name: Test
-      run: make check
-    - name: Distcheck
-      run: |
-        # distcheck runs configure again so we need to specify CXX again.
-        export CXX=g++-7
-        make distcheck
diff --git a/.github/workflows/autotools-gcc-8.yml b/.github/workflows/autotools-gcc-8.yml
index e9aa877..22c32d4 100644
--- a/.github/workflows/autotools-gcc-8.yml
+++ b/.github/workflows/autotools-gcc-8.yml
@@ -12,7 +12,7 @@ jobs:
     - name: Build
       run: |
         sudo apt update
-        sudo apt install mm-common g++-8
+        sudo apt install mm-common g++-8 docbook-xsl
         export CXX=g++-8
         ./autogen.sh --enable-warnings=fatal
         make
diff --git a/.github/workflows/autotools-gcc-9.yml b/.github/workflows/autotools-gcc-9.yml
index 0b2d9b1..2ef20b4 100644
--- a/.github/workflows/autotools-gcc-9.yml
+++ b/.github/workflows/autotools-gcc-9.yml
@@ -12,7 +12,7 @@ jobs:
     - name: Build
       run: |
         sudo apt update
-        sudo apt install mm-common g++-9
+        sudo apt install mm-common g++-9 docbook-xsl
         export CXX=g++-9
         ./autogen.sh --enable-warnings=fatal
         make
diff --git a/.github/workflows/meson-clang-10.yml b/.github/workflows/meson-clang-10.yml
index 0093579..fda48da 100644
--- a/.github/workflows/meson-clang-10.yml
+++ b/.github/workflows/meson-clang-10.yml
@@ -14,7 +14,7 @@ jobs:
         # Prevent blocking apt install on a question during configuring of tzdata.
         export ENV DEBIAN_FRONTEND=noninteractive
         sudo apt update
-        sudo apt install libxml2-utils docbook5-xml mm-common clang-10 ninja-build python3-setuptools python3-pip --yes
+        sudo apt install libxml2-utils docbook5-xml docbook-xsl mm-common clang-10 ninja-build python3-setuptools python3-pip --yes
         # Ubuntu 20.04 contains meson 0.53.2, but libsigc++ requires meson >= 0.54.0.
         # Install it with pip3 instead of apt.
         sudo pip3 install "meson>=0.54.0"
diff --git a/.github/workflows/meson-gcc-9.yml b/.github/workflows/meson-gcc-9.yml
index 51f9b4c..0543b32 100644
--- a/.github/workflows/meson-gcc-9.yml
+++ b/.github/workflows/meson-gcc-9.yml
@@ -14,7 +14,7 @@ jobs:
         # Prevent blocking apt install on a question during configuring of tzdata.
         export ENV DEBIAN_FRONTEND=noninteractive
         sudo apt update
-        sudo apt install libxml2-utils docbook5-xml mm-common g++-9 ninja-build python3-setuptools python3-pip --yes
+        sudo apt install libxml2-utils docbook5-xml docbook-xsl mm-common g++-9 ninja-build python3-setuptools python3-pip --yes
         # Ubuntu 20.04 contains meson 0.53.2, but libsigc++ requires meson >= 0.54.0.
         # Install it with pip3 instead of apt.
         sudo pip3 install "meson>=0.54.0"