Require C++14

Author: Quincunx271

.github/workflows/checks.yml

@@ -96,6 +96,8 @@ jobs:
             -DLLVM_PARALLEL_LINK_JOBS=1 ../cmake/superbuild                            \
             -DCMAKE_CXX_COMPILER_LAUNCHER=ccache -DCMAKE_C_COMPILER_LAUNCHER=ccache    \
             -DCMAKE_CXX_COMPILER=g++ -DCMAKE_C_COMPILER=gcc                            \
+            -DCMAKE_CXX_STANDARD=14                                                    \
+            -DLLVM_ENABLE_CXX1Y=ON                                                     \
             -DOPTSCHEDSUPER_LLVM_EXTRA_CMAKE_ARGS='-DLLVM_ENABLE_ASSERTIONS=ON'        \
             -DOPTSCHED_EXTRA_DEFINITIONS='-DIS_DEBUG'
 
@@ -188,6 +190,7 @@ jobs:
         cmake ../llvm-project/llvm -GNinja -DCMAKE_BUILD_TYPE=Debug                    \
             -DCMAKE_CXX_COMPILER=g++                                                   \
             -DCMAKE_C_COMPILER=gcc                                                     \
+            -DCMAKE_CXX_STANDARD=14                                                    \
             -DCMAKE_EXPORT_COMPILE_COMMANDS=ON                                         \
             '-DLLVM_TARGETS_TO_BUILD=X86;AMDGPU'                                       \
             -DLLVM_TABLEGEN=$(which llvm-tblgen-7)                                     \

CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.4.3)
+cmake_minimum_required(VERSION 3.8)
 
 project(OptSched)
 

lib/CMakeLists.txt

@@ -58,4 +58,5 @@ add_optsched_library(OptSched
   ${OPTSCHED_SRCS}
   LINK_LIBS ${OPTSCHED_LINK_LIBS}
 )
+target_compile_features(OptSched PUBLIC cxx_std_14) # We need >= C++14
 add_dependencies(OptSched ${OPTSCHED_TARGET_DEPS})

unittests/CMakeLists.txt

@@ -10,6 +10,7 @@ endfunction()
 
 # All unit test targets depend on OptSched
 add_library(UnitTest.OptSched STATIC $<TARGET_OBJECTS:obj.OptSched>)
+target_compile_features(UnitTest.OptSched PUBLIC cxx_std_14)
 link_libraries(UnitTest.OptSched)
 
 add_subdirectory(Basic)