Fix linkage on Windows with muParser.

diff --git a/bundled/muparser_v2_3_3/CMakeLists.txt b/bundled/muparser_v2_3_3/CMakeLists.txt
index 1fcf61cf5178c21df73dd545906e062d368daa99..2da17525c114d3893b6341402cda6a8f4265f5f0 100644 (file)
--- a/bundled/muparser_v2_3_3/CMakeLists.txt
+++ b/bundled/muparser_v2_3_3/CMakeLists.txt
@@ -39,4 +39,8 @@ src/muParserTest.cpp
 src/muParserTokenReader.cpp
   )
 
-#DEAL_II_ADD_DEFINITIONS(obj_muparser "FP_USE_THREAD_SAFE_EVAL")
+# We do not support (yet) compiling DLLs with MSVC. By default, muParser will
+# try to set itself up correctly with __declspec(dllexport). Get around this by
+# instructing it to use static linkage, which will define (see muParserFixes.h)
+# AP_EXPORT_CXX to nothing.
+DEAL_II_ADD_DEFINITIONS(obj_muparser "MUPARSER_STATIC")