Only test with GCC 5 and 8.

.drone.yml

@@ -34,35 +34,6 @@ pipeline:
     volumes:
       - /var/cache/debian-package-cache:/var/cache/apt/archives
 
-  gcc7:
-    image: debian:stretch-slim
-    pull: true
-    environment:
-      - LANG=C.utf8
-    commands:
-      - rm /etc/apt/apt.conf.d/docker-clean
-      - apt-get update -q
-      - echo "APT::Default-Release \"stretch\";" >> /etc/apt/apt.conf.d/00default_release
-      - echo "deb http://deb.debian.org/debian sid main" >> /etc/apt/sources.list.d/sid.list
-      - echo "deb http://ppa.launchpad.net/ubuntu-toolchain-r/test/ubuntu xenial main" >> /etc/apt/sources.list.d/ubuntu-toolchain-r.list
-      - apt-get install -qy gnupg
-      - gpg --keyserver hkp://keyserver.ubuntu.com --recv-keys 0x60c317803a41ba51845e371a1e9377a2ba9ef27f
-      - gpg --armor --export 0x60c317803a41ba51845e371a1e9377a2ba9ef27f | apt-key add -
-      - apt-get update -q
-      - apt-get install -qy build-essential cmake pkg-config
-      - apt-get install -qy -t xenial g++-7
-      - update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-7 100
-      - update-alternatives --set g++ /usr/bin/g++-7
-      - apt-get install -qy libcurl4-openssl-dev libjsoncpp-dev libboost-all-dev
-      - apt-get install -qy -t sid libcurlpp-dev
-      - dpkg -i mastodon-cpp.deb
-      - rm -rf build && mkdir -p build && cd build
-      - cmake ..
-      - make VERBOSE=1
-      - make install DESTDIR=install
-    volumes:
-      - /var/cache/debian-package-cache:/var/cache/apt/archives
-
   gcc5:
     image: debian:stretch-slim
     pull: true
@@ -92,27 +63,6 @@ pipeline:
     volumes:
       - /var/cache/debian-package-cache:/var/cache/apt/archives
 
-  gcc6:
-    image: debian:stretch-slim
-    pull: true
-    environment:
-      - LANG=C.utf8
-    commands:
-      - rm /etc/apt/apt.conf.d/docker-clean
-      - echo "APT::Default-Release \"stretch\";" >> /etc/apt/apt.conf.d/00default_release
-      - echo "deb http://deb.debian.org/debian sid main" >> /etc/apt/sources.list.d/sid.list
-      - apt-get update -q
-      - apt-get install -qy build-essential cmake pkg-config
-      - apt-get install -qy libcurl4-openssl-dev libjsoncpp-dev libboost-all-dev
-      - apt-get install -qy -t sid libcurlpp-dev
-      - dpkg -i mastodon-cpp.deb
-      - rm -rf build && mkdir -p build && cd build
-      - cmake ..
-      - make VERBOSE=1
-      - make install DESTDIR=install
-    volumes:
-      - /var/cache/debian-package-cache:/var/cache/apt/archives
-
   notify:
     image: drillster/drone-email
     pull: true