ci: update minimum compiler requirements for std::filesystem

Author: fanquake

ci/test/00_setup_env_native_nowallet.sh

@@ -8,7 +8,7 @@ export LC_ALL=C.UTF-8
 
 export CONTAINER_NAME=ci_native_nowallet
 export DOCKER_NAME_TAG=ubuntu:18.04  # Use bionic to have one config run the tests in python3.6, see doc/dependencies.md
-export PACKAGES="python3-zmq clang-5.0 llvm-5.0"  # Use clang-5 to test C++17 compatibility, see doc/dependencies.md
-export DEP_OPTS="NO_WALLET=1"
+export PACKAGES="python3-zmq clang-7 llvm-7 libc++abi-7-dev libc++-7-dev"  # Use clang-7 to test C++17 compatibility, see doc/dependencies.md
+export DEP_OPTS="NO_WALLET=1 CC=clang-7 CXX='clang++-7 -stdlib=libc++'"
 export GOAL="install"
-export BITCOIN_CONFIG="--enable-reduce-exports CC=clang-5.0 CXX=clang++-5.0"
+export BITCOIN_CONFIG="--enable-reduce-exports CC=clang-7 CXX='clang++-7 -stdlib=libc++'"

ci/test/00_setup_env_native_qt5.sh

@@ -7,13 +7,13 @@
 export LC_ALL=C.UTF-8
 
 export CONTAINER_NAME=ci_native_qt5
-export DOCKER_NAME_TAG=ubuntu:18.04  # Check that bionic gcc-7 can compile our c++17 and run our functional tests in python3, see doc/dependencies.md
-export PACKAGES="python3-zmq qtbase5-dev qttools5-dev-tools libdbus-1-dev libharfbuzz-dev"
+export DOCKER_NAME_TAG=ubuntu:18.04  # Check that bionic gcc-8 can compile our C++17 and run our functional tests in python3, see doc/dependencies.md
+export PACKAGES="gcc-8 g++-8 python3-zmq qtbase5-dev qttools5-dev-tools libdbus-1-dev libharfbuzz-dev"
 export DEP_OPTS="NO_QT=1 NO_UPNP=1 NO_NATPMP=1 DEBUG=1 ALLOW_HOST_PACKAGES=1"
 export TEST_RUNNER_EXTRA="--previous-releases --coverage --extended --exclude feature_dbcrash"  # Run extended tests so that coverage does not fail, but exclude the very slow dbcrash
 export RUN_UNIT_TESTS_SEQUENTIAL="true"
 export RUN_UNIT_TESTS="false"
 export GOAL="install"
 export PREVIOUS_RELEASES_TO_DOWNLOAD="v0.15.2 v0.16.3 v0.17.2 v0.18.1 v0.19.1 v0.20.1"
 export BITCOIN_CONFIG="--enable-zmq --with-libs=no --with-gui=qt5 --enable-reduce-exports
---enable-debug --disable-fuzz-binary  CFLAGS=\"-g0 -O2 -funsigned-char\" CXXFLAGS=\"-g0 -O2 -funsigned-char\""
+--enable-debug --disable-fuzz-binary  CFLAGS=\"-g0 -O2 -funsigned-char\" CXXFLAGS=\"-g0 -O2 -funsigned-char\" CC=gcc-8 CXX=g++-8"