correct _STATIC_DEFINE flag names

Fixes commonmark#156.

Author: kivikakk

extensions/CMakeLists.txt

@@ -52,7 +52,7 @@ if (CMARK_STATIC)
   add_library(${STATICLIBRARY} STATIC ${LIBRARY_SOURCES})
 
   set_target_properties(${STATICLIBRARY} PROPERTIES
-    COMPILE_FLAGS "-DCMARK_STATIC_DEFINE -DCMARKEXTENSIONS_STATIC_DEFINE"
+    COMPILE_FLAGS "-DCMARK_GFM_STATIC_DEFINE -DCMARK_GFM_EXTENSIONS_STATIC_DEFINE"
     POSITION_INDEPENDENT_CODE ON)
 
   if (MSVC)

src/CMakeLists.txt

@@ -87,7 +87,7 @@ endif()
 
 # Disable the PUBLIC declarations when compiling the executable:
 set_target_properties(${PROGRAM} PROPERTIES
-  COMPILE_FLAGS "-DCMARK_STATIC_DEFINE -DCMARKEXTENSIONS_STATIC_DEFINE")
+  COMPILE_FLAGS "-DCMARK_GFM_STATIC_DEFINE -DCMARK_GFM_EXTENSIONS_STATIC_DEFINE")
 
 # Check integrity of node structure when compiled as debug:
 set(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} -DCMARK_DEBUG_NODES -DDEBUG")
@@ -123,7 +123,7 @@ endif()
 if (CMARK_STATIC)
   add_library(${STATICLIBRARY} STATIC ${LIBRARY_SOURCES})
   set_target_properties(${STATICLIBRARY} PROPERTIES
-    COMPILE_FLAGS -DCMARK_STATIC_DEFINE
+    COMPILE_FLAGS -DCMARK_GFM_STATIC_DEFINE
     POSITION_INDEPENDENT_CODE ON)
 
   if (MSVC)