Update cmakelists vs check

Commit migrated from https://github.com/dotnet/corefx/commit/bfe0055b8bfdccf4834d7ff576bae4064e90fa3e

diff --git a/src/libraries/Native/Windows/clrcompression/CMakeLists.txt b/src/libraries/Native/Windows/clrcompression/CMakeLists.txt
index 178c5f5..98c292b 100644 (file)
--- a/src/libraries/Native/Windows/clrcompression/CMakeLists.txt
+++ b/src/libraries/Native/Windows/clrcompression/CMakeLists.txt
@@ -77,8 +77,9 @@ else()
     )
 endif()
 
-if ($ENV{__VSVersion} STREQUAL vs2017)
-    add_definitions(-DHAVE_VSNPRINTF)
+check_symbol_exists(vsnprintf stdio.h HAVE_VSNPRINTF)
+if (HAVE_VSNPRINTF) # HAVE_VSNPRINTF is CMAKE variable, compiler doesn't know about it yet
+    add_definitions(-DHAVE_VSNPRINTF) # this is for the compiler
 endif ()
 
 #Include Brotli include files