irrelevant on Microsoft C++

CMakeLists.txt

@@ -8,7 +8,9 @@ project(${PROJECT_NAME} C CXX)
 option(USE_AVX2 "enable avx2 code" )
 option(USE_NETNS "enable networking namespace support. Linux only" )
 option(AMD_RYZEN_HACK "hack for AMD Ryzen FPU bug (support FMA3 and FMA4 in FPU, but does not show in CPUID)" )
+if (NOT MSVC)
 option(STATIC_LINK_RUNTIME "link statically against compiler runtime, standard library and pthreads")
+endif()
 option(NON_PC_TARGET "non-pc target build: iphone, andriod, embedded non-i386 SBC, etc" )
 option(SHADOW "use shadow testing framework. linux only" )
 option(ASAN "use address sanitiser, if your system has it" )
@@ -76,8 +78,10 @@ if (NOT ${CMAKE_SYSTEM_NAME} MATCHES "Linux" AND SHADOW)
 endif(NOT ${CMAKE_SYSTEM_NAME} MATCHES "Linux" AND SHADOW)
 
 if (WIN32 AND NOT STATIC_LINK_RUNTIME)
-  message("must ship compiler runtime libraries with this build: libwinpthread-1.dll, libgcc_s_dw2-1.dll, and libstdc++-6.dll")
-  message("for release builds, turn on STATIC_LINK_RUNTIME in cmake options")
+  if(NOT MSVC)
+    message("must ship compiler runtime libraries with this build: libwinpthread-1.dll, libgcc_s_dw2-1.dll, and libstdc++-6.dll")
+    message("for release builds, turn on STATIC_LINK_RUNTIME in cmake options")
+  endif()
 endif(WIN32 AND NOT STATIC_LINK_RUNTIME)
 
 add_subdirectory(vendor/cxxopts)