Missing file added

cmake/common.cmake

@@ -0,0 +1,69 @@
+include(ExternalProject)
+
+######################################################################
+# build flags
+
+if (${CMAKE_CXX_COMPILER_ID} STREQUAL MSVC)
+    # https://developercommunity.visualstudio.com/content/problem/55671/c4307-issued-for-unsigned.html
+    set(MISC_FLAGS "/W4 /WX /errorReport:prompt /nologo /wd4307")
+
+    # no tested
+    set(CPP17_ENABLED_FLAGS "/std:c++latest")
+
+    set(EXCEPTION_ENABLED_FLAGS "/EHsc")
+    set(EXCEPTION_DISABLED_FLAGS "-DBOOST_NO_EXCEPTIONS -DBOOST_NO_RTTI")
+
+    # 128-bit integers are not supported in MSVC
+    set(INT128_ENABLED_FLAGS "")
+    set(INT128_DISABLED_FLAGS "")
+
+    set(PROFILE_ENABLED_FLAGS "/Oy-")
+    set(PROFILE_DISABLED_FLAGS "")
+elseif (${CMAKE_CXX_COMPILER_ID} STREQUAL Clang OR ${CMAKE_CXX_COMPILER_ID} STREQUAL AppleClang OR ${CMAKE_CXX_COMPILER_ID} STREQUAL GNU)
+    set(MISC_FLAGS "-pthread -Wall -Wextra -Wpedantic -Werror")
+
+    set(CPP17_ENABLED_FLAGS "-std=c++17")
+
+    set(EXCEPTION_ENABLED_FLAGS "-fexceptions -frtti")
+    set(EXCEPTION_DISABLED_FLAGS "-DBOOST_NO_EXCEPTIONS -DBOOST_NO_RTTI -fno-exceptions -fno-rtti")
+
+    set(INT128_ENABLED_FLAGS "-DCNL_USE_INT128")
+    set(INT128_DISABLED_FLAGS "")
+
+    set(PROFILE_ENABLED_FLAGS "-fno-omit-frame-pointer")
+    set(PROFILE_DISABLED_FLAGS "")
+else ()
+    message(FATAL_ERROR "unrecognized compiler: ${CMAKE_CXX_COMPILER_ID}")
+endif ()
+
+set(STD 14 CACHE STRING "version of C++ standard: 11, 14 or 17")
+if (${STD} STREQUAL "17")
+    set(STD_FLAGS "${CPP17_ENABLED_FLAGS}")
+else ()
+    set(CMAKE_CXX_STANDARD ${STD})
+endif ()
+
+set(EXCEPTIONS ON CACHE BOOL "compile with exceptions enabled")
+if (EXCEPTIONS)
+    set(EXCEPTION_FLAGS "${EXCEPTION_ENABLED_FLAGS}")
+else (EXCEPTIONS)
+    set(EXCEPTION_FLAGS "${EXCEPTION_DISABLED_FLAGS}")
+endif (EXCEPTIONS)
+
+set(INT128 ON CACHE BOOL "compile with support for 128-bit integers (where available)")
+if (INT128)
+    set(INT128_FLAGS "${INT128_ENABLED_FLAGS}")
+else (INT128)
+    set(INT128_FLAGS "${INT128_DISABLED_FLAGS}")
+endif (INT128)
+
+set(PROFILE OFF CACHE BOOL "compile with frame pointer enabled for better profiling information")
+if (PROFILE)
+    set(PROFILE_FLAGS "${PROFILE_ENABLED_FLAGS}")
+else (PROFILE)
+    set(PROFILE_FLAGS "${PROFILE_DISABLED_FLAGS}")
+endif (PROFILE)
+
+set(COMMON_CXX_FLAGS "${MISC_FLAGS} ${STD_FLAGS} ${EXCEPTION_FLAGS} ${INT128_FLAGS} ${PROFILE_FLAGS}")
+
+set(BUILD_SHARED_LIBS, ON)