Add Intel ICC 18 detection/support to CMakeLists.txt

Author: Spudz76

CMakeLists.txt

@@ -28,6 +28,25 @@ if(${CMAKE_CXX_COMPILER_ID} STREQUAL "GNU")
     if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS 5.1)
         message(FATAL_ERROR "g++ version must be at least 5.1!")
     endif()
+elseif(CMAKE_CXX_COMPILER_ID MATCHES "Intel")
+    include_directories(BEFORE "/opt/intel/include")
+    add_definitions(-D__PURE_INTEL_C99_HEADERS__)
+    link_directories(BEFORE "/opt/intel/lib")
+    if((CMAKE_CXX_COMPILER_VERSION VERSION_GREATER 17) AND (CMAKE_CXX_COMPILER_VERSION VERSION_LESS 19))
+        # locate best gcc version to pass to icc-18 (gcc-8 doesn't work, for example)
+        # Use -DICC_GCCVER=6 for example to force 'gcc-6' and 'g++-6'
+        # Otherwise, the newest available and compatible pair will be selected
+        find_program(ICC_GXX NAMES "g++-${ICC_GCCVER}" "g++-7" "g++-6" "g++")
+        get_filename_component(ICC_GXX ${ICC_GXX} NAME)
+        find_program(ICC_GCC NAMES "gcc-${ICC_GCCVER}" "gcc-7" "gcc-6" "gcc")
+        get_filename_component(ICC_GCC ${ICC_GCC} NAME)
+        set(ICC_COMPILERS "-gxx-name=${ICC_GXX} -gcc-name=${ICC_GCC}")
+        unset(ICC_GXX)
+        unset(ICC_GCC)
+    endif()
+    message(STATUS "Intel ICC-18 subcompiler flags: ${ICC_COMPILERS}")
+    set(CMAKE_CXX_FLAGS "-O3 -no-prec-div -fp-model fast=2 -std=gnu++11 ${ICC_COMPILERS}")
+    set(CMAKE_C_FLAGS "-O3 -no-prec-div -fp-model fast=2 -std=gnu99 ${ICC_COMPILERS}")
 endif()
 
 set(BUILD_TYPE "Release;Debug")
@@ -39,7 +58,11 @@ set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS "${BUILD_TYPE}")
 set(XMR-STAK_COMPILE "native" CACHE STRING "select CPU compute architecture")
 set_property(CACHE XMR-STAK_COMPILE PROPERTY STRINGS "native;generic")
 if(XMR-STAK_COMPILE STREQUAL "native")
-    if(NOT CMAKE_CXX_COMPILER_ID MATCHES "MSVC")
+    if(CMAKE_CXX_COMPILER_ID MATCHES "Intel")
+        # activate Intel Compiler options: optimize for current host CPU
+        set(CMAKE_CXX_FLAGS "-xHOST ${CMAKE_CXX_FLAGS}")
+        set(CMAKE_C_FLAGS "-xHOST ${CMAKE_C_FLAGS}")
+    elseif(NOT CMAKE_CXX_COMPILER_ID MATCHES "MSVC")
         set(CMAKE_CXX_FLAGS "-march=native -mtune=native ${CMAKE_CXX_FLAGS}")
         set(CMAKE_C_FLAGS "-march=native -mtune=native ${CMAKE_C_FLAGS}")
     endif()
@@ -421,7 +444,7 @@ if(CMAKE_CXX_COMPILER_ID MATCHES "MSVC")
     add_definitions(-D_CRT_SECURE_NO_DEPRECATE)
     # disable min define to allow usage of std::min
     add_definitions(-DNOMINMAX)
-else()
+elseif(NOT CMAKE_CXX_COMPILER_ID MATCHES "Intel")
     # activate sse2 and aes-ni
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -msse2 -maes")
     set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -msse2 -maes")
@@ -442,6 +465,8 @@ if(CMAKE_LINK_STATIC)
     set(CMAKE_FIND_LIBRARY_SUFFIXES ".a")
     if(${CMAKE_CXX_COMPILER_ID} STREQUAL "GNU" OR ${CMAKE_C_COMPILER_ID} STREQUAL "GNU")
         set(LIBS "-static-libgcc -static-libstdc++ ${LIBS}")
+    elseif(CMAKE_CXX_COMPILER_ID MATCHES "Intel")
+        set(LIBS "-static-libgcc -static-libstdc++ -static-intel ${LIBS}")
     endif()
 endif()