Merge pull request #195 from ethereum/gcc4

Test minimal supported compilers

CMakeLists.txt

@@ -21,6 +21,7 @@ include(CMakePackageConfigHelpers)
 include(GNUInstallDirs)
 
 if(EVMC_TESTING)
+    set(HUNTER_CONFIGURATION_TYPES Release CACHE STRING "Build type of Hunter packages")
     include(HunterGate)
     include(HunterConfig)
     include(defaults/HunterCacheServers)

README.md

@@ -18,10 +18,10 @@ Please visit the [documentation].
 
 ### Languages support
 
-| Language                | Supported Versions  |
-| ----------------------- | ------------------- |
-| **C**                   | C90, C99, C11       |
-| **C++** _(helpers)_[^1] | C++11, C++14, C++17 |
+| Language                | Supported Versions  | Supported Compilers
+| ----------------------- | ------------------- | -------------------
+| **C**                   | C90, C99, C11       | GCC 6+, clang 3.8+
+| **C++** _(helpers)_[^1] | C++11, C++14, C++17 | GCC 6+, clang 3.8+
 | **Go** _(bindings)_     | 1.9, 1.10, 1.11     |
 
 [^1]: C++ support is provided by C headers and some optional C++ helpers.

circle.yml

@@ -3,12 +3,13 @@ jobs:
 
   lint:
     docker:
-    - image: ethereum/cpp-build-env:7
+    - image: ethereum/cpp-build-env:10
     steps:
     - checkout
     - run:
         name: "Check code format"
         command: |
+          clang-format --version
           find examples include lib test -name '*.hpp' -o -name '*.cpp' -o -name '*.h' -o -name '*.c' | xargs clang-format -i
           git diff --color --exit-code
     - run:
@@ -18,11 +19,21 @@ jobs:
           sudo pip3 install codespell
           codespell --quiet-level=4 --ignore-words=./.codespell-whitelist
 
-  build-cxx11: &build
+  build: &build
     docker:
-      - image: ethereum/cpp-build-env:7
+      - image: ethereum/cpp-build-env:10
     steps:
       - checkout
+      - run:
+          name: "Environment"
+          command: |
+            CC=${CC:-cc}
+            CXX=${CXX:-cpp}
+            echo CC: $CC
+            echo CXX: $CXX
+            $CC --version
+            $CXX --version
+            cmake --version
       - run:
           name: "Configure"
           working_directory: ~/build
@@ -63,23 +74,35 @@ jobs:
           name: "Run evmc-vmtester libevmc-example-vm.so"
           command: ~/install/bin/evmc-vmtester ~/install/lib/libevmc-example-vm.so
 
+  build-cxx17:
+    <<: *build
+    environment:
+      CC: gcc-8
+      CXX: g++-8
+      CMAKE_OPTIONS: -DTOOLCHAIN=cxx17-pic
+
   build-cxx14:
     <<: *build
     environment:
-      CC: clang-3.8
-      CXX: clang++-3.8
+      CC: clang-8
+      CXX: clang++-8
       CMAKE_OPTIONS: -DTOOLCHAIN=cxx14-pic
 
-  build-cxx17:
+  build-gcc6:
     <<: *build
     environment:
       CC: gcc-6
       CXX: g++-6
-      CMAKE_OPTIONS: -DTOOLCHAIN=cxx17-pic
+
+  build-clang3.8:
+    <<: *build
+    environment:
+      CC: clang-3.8
+      CXX: clang++-3.8
 
   test-docs:
     docker:
-      - image: ethereum/cpp-build-env
+      - image: ethereum/cpp-build-env:10
     steps:
       - checkout
       - run:
@@ -98,7 +121,7 @@ jobs:
 
   upload-docs:
     docker:
-      - image: ethereum/cpp-build-env
+      - image: ethereum/cpp-build-env:10
     steps:
       - checkout
       - run:
@@ -141,9 +164,10 @@ workflows:
   evmc:
     jobs:
       - lint
-      - build-cxx11
-      - build-cxx14
       - build-cxx17
+      - build-cxx14
+      - build-gcc6
+      - build-clang3.8
       - bindings-go-1.11
       - bindings-go-1.10
       - bindings-go-1.9

test/CMakeLists.txt

@@ -1,5 +1,5 @@
 # EVMC: Ethereum Client-VM Connector API.
-# Copyright 2018 The EVMC Authors.
+# Copyright 2019 The EVMC Authors.
 # Licensed under the Apache License, Version 2.0. See the LICENSE file.
 
 hunter_add_package(GTest)
@@ -8,6 +8,7 @@ find_package(GTest CONFIG REQUIRED)
 if(NOT CMAKE_CXX_STANDARD)
     set(CMAKE_CXX_STANDARD 11)
     set(CMAKE_CXX_EXTENSIONS OFF)
+    set(CMAKE_C_EXTENSIONS OFF)
 endif()
 
 add_subdirectory(integration)

test/integration/compilation/CMakeLists.txt

@@ -5,28 +5,32 @@
 # This CMake script creates multiple additional targets to test the compilation of public headers
 # with different C and C++ standards.
 
+set(standards c_std_90;c_std_99;c_std_11;cxx_std_11;cxx_std_14)
+if(NOT CMAKE_CXX_COMPILER_ID STREQUAL Clang OR CMAKE_CXX_COMPILER_VERSION VERSION_GREATER 3.8.1)
+    list(APPEND standards cxx_std_17)
+endif()
+
+list(APPEND all_features ${CMAKE_CXX_COMPILE_FEATURES})
+list(APPEND all_features ${CMAKE_C_COMPILE_FEATURES})
+
 macro(create_compilation_test STANDARD)
-    if (${STANDARD} MATCHES "^(C|CXX)([0-9]+)$")
+    if (${STANDARD} MATCHES "^(c|cxx)_std_([0-9]+)$")
         set(lang ${CMAKE_MATCH_1})
         set(num ${CMAKE_MATCH_2})
     else()
-        message(FATAL_ERROR "Unknown language standard: ${STANDARD}")
+        message(FATAL_ERROR "Unknown standard: ${STANDARD}")
     endif()
 
-    if (lang STREQUAL CXX)
-        set(ext cpp)
+    if(${STANDARD} IN_LIST all_features)
+        set(target test-compile-${STANDARD})
+        add_library(${target} OBJECT compilation_test.${lang})
+        target_compile_features(${target} PRIVATE ${STANDARD})
+        target_include_directories(${target} PRIVATE ${include_dir})
     else()
-        set(ext c)
+        message(STATUS "Compilation test SKIPPED: ${STANDARD}")
     endif()
-
-    string(TOLOWER ${STANDARD} standard)
-    set(target test-compile-${standard})
-
-    add_library(${target} OBJECT compilation_test.${ext})
-    target_include_directories(${target} PRIVATE ${include_dir})
-    set_target_properties(${target} PROPERTIES ${lang}_STANDARD ${num} ${lang}_EXTENSIONS OFF)
 endmacro()
 
-foreach(standard C90;C99;C11;CXX11;CXX14;CXX17)
+foreach(standard ${standards})
     create_compilation_test(${standard})
 endforeach()

test/vmtester/tests.cpp

@@ -111,9 +111,9 @@ TEST_F(evmc_vm_test, version)
 
 TEST_F(evmc_vm_test, set_tracer)
 {
-    static const auto tracer_callback = [](evmc_tracer_context*, size_t, evmc_status_code, int64_t,
-                                           size_t, const evmc_uint256be*, size_t, size_t, size_t,
-                                           const uint8_t*) noexcept {};
+    static const auto tracer_callback =
+        [](evmc_tracer_context*, size_t, evmc_status_code, int64_t, size_t, const evmc_uint256be*,
+           size_t, size_t, size_t, const uint8_t*) noexcept {};
     if (vm->set_tracer)
         vm->set_tracer(vm, tracer_callback, nullptr);
 }