Merge pull request #5502 from ethereum/cpp14

Enables C++14 standard (was C++11) within the Solidity compiler project.

.travis.yml

@@ -55,6 +55,18 @@ matrix:
           env:
               - ZIP_SUFFIX=ubuntu-trusty
               - SOLC_STOREBYTECODE=On
+          before_install:
+              - sudo add-apt-repository -y ppa:ubuntu-toolchain-r/test
+              - sudo add-apt-repository -y ppa:mhier/libboost-latest
+              - sudo add-apt-repository -y ppa:hvr/z3
+              - sudo apt-get update -qq
+          install:
+              - sudo apt-get install -qq g++-8 gcc-8
+              - sudo apt-get install -qq libboost1.67-dev
+              - sudo apt-get install -qq libleveldb1
+              - sudo apt-get install -qq libz3-dev
+              - sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-8 90
+              - sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-8 90
 
         - os: linux
           dist: trusty
@@ -63,6 +75,18 @@ matrix:
           env:
               - ZIP_SUFFIX=ubuntu-trusty-clang
               - SOLC_STOREBYTECODE=On
+          before_install:
+              - sudo add-apt-repository -y ppa:ubuntu-toolchain-r/test
+              - sudo add-apt-repository -y ppa:mhier/libboost-latest
+              - sudo add-apt-repository -y ppa:hvr/z3
+              - sudo apt-get update -qq
+          install:
+              - sudo apt-get install -qq g++-8 gcc-8
+              - sudo apt-get install -qq libboost1.67-dev
+              - sudo apt-get install -qq libleveldb1
+              - sudo apt-get install -qq libz3-dev
+              - sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-8 90
+              - sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-8 90
 
         # Docker target, which generates a statically linked alpine image
         - os: linux
@@ -159,18 +183,15 @@ cache:
 install:
     - test $SOLC_INSTALL_DEPS_TRAVIS != On || (scripts/install_deps.sh)
     - test "$TRAVIS_OS_NAME" != "linux" || (scripts/install_cmake.sh)
-    # Disable tests unless run on the release branch, on tags or with daily cron
-    #- if [ "$TRAVIS_BRANCH" != release -a -z "$TRAVIS_TAG" -a "$TRAVIS_EVENT_TYPE" != cron ]; then SOLC_TESTS=Off; fi
-    - SOLC_TESTS=Off
-    - if [ "$TRAVIS_BRANCH" = release -o -n "$TRAVIS_TAG" ]; then echo -n > prerelease.txt; else date -u +"nightly.%Y.%-m.%-d" > prerelease.txt; fi
-    - echo -n "$TRAVIS_COMMIT" > commit_hash.txt
 
 before_script:
+    # Disable tests unless run on the release branch, on tags or with daily cron
+    - if [ "$TRAVIS_BRANCH" != release -a -z "$TRAVIS_TAG" -a "$TRAVIS_EVENT_TYPE" != cron ]; then SOLC_TESTS=Off; fi
+    - if [ "$TRAVIS_BRANCH" = release -o -n "$TRAVIS_TAG" ]; then echo -n > prerelease.txt; else date -u +"nightly.%Y.%-m.%-d" > prerelease.txt; fi
+    - echo -n "$TRAVIS_COMMIT" > commit_hash.txt
     - test $SOLC_EMSCRIPTEN != On || (scripts/build_emscripten.sh)
     - test $SOLC_DOCKER != On || (scripts/docker_build.sh)
-    - test $SOLC_RELEASE != On || (scripts/build.sh $SOLC_BUILD_TYPE
-      && scripts/release.sh $ZIP_SUFFIX
-      && scripts/create_source_tarball.sh)
+    - test $SOLC_RELEASE != On || (scripts/build.sh $SOLC_BUILD_TYPE -DBoost_USE_STATIC_LIBS=OFF && scripts/create_source_tarball.sh)
 
 script:
     - test $SOLC_EMSCRIPTEN != On -o $SOLC_TESTS != On || (scripts/test_emscripten.sh)
@@ -204,7 +225,7 @@ deploy:
             - release
             - /^v\d/
     # This is the deploy target for the native build (Linux and macOS)
-    # which generates ZIPs per commit and the source tarball.
+    # which generates the source tarball.
     #
     # This runs for each tag that is created and adds the corresponding files.
     - provider: releases

cmake/EthCompilerSettings.cmake

@@ -25,8 +25,8 @@ eth_add_cxx_compiler_flag_if_supported(-Wimplicit-fallthrough)
 
 if (("${CMAKE_CXX_COMPILER_ID}" MATCHES "GNU") OR ("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang"))
 
-	# Use ISO C++11 standard language.
-	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
+	# Use ISO C++14 standard language.
+	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++14")
 
 	# Enables all the warnings about constructions that some users consider questionable,
 	# and that are easy to avoid.  Also enable some extra warning flags that are not

cmake/jsoncpp.cmake

@@ -15,9 +15,9 @@ set(JSONCPP_INCLUDE_DIR "${prefix}/include")
 # versions used in the CI runs.
 if(EMSCRIPTEN)
     # Do not include all flags in CMAKE_CXX_FLAGS for emscripten,
-    # but only use -std=c++11. Using all flags causes build failures
+    # but only use -std=c++14. Using all flags causes build failures
     # at the moment.
-    set(JSONCPP_CXX_FLAGS -std=c++11)
+    set(JSONCPP_CXX_FLAGS -std=c++14)
 else()
     set(JSONCPP_CXX_FLAGS ${CMAKE_CXX_FLAGS})
 endif()

scripts/release_ppa.sh

@@ -114,7 +114,7 @@ Priority: extra
 Maintainer: Christian (Buildserver key) <builds@ethereum.org>
 Build-Depends: ${Z3DEPENDENCY}debhelper (>= 9.0.0),
                cmake,
-               g++-4.8,
+               g++-8,
                git,
                libgmp-dev,
                libboost-all-dev,
@@ -168,7 +168,7 @@ override_dh_shlibdeps:
 	dh_shlibdeps --dpkg-shlibdeps-params=--ignore-missing-info
 
 override_dh_auto_configure:
-	dh_auto_configure -- -DINSTALL_LLLC=Off
+	dh_auto_configure -- -DINSTALL_LLLC=Off -DCMAKE_C_COMPILER=gcc-8 -DCMAKE_CXX_COMPILER=g++-8
 EOF
 cat <<EOF > debian/copyright
 Format: http://www.debian.org/doc/packaging-manuals/copyright-format/1.0/