diff --git a/direct/src/deadrec/CMakeLists.txt b/direct/src/deadrec/CMakeLists.txt
index 26e745268d..fd373bb05c 100644
--- a/direct/src/deadrec/CMakeLists.txt
+++ b/direct/src/deadrec/CMakeLists.txt
@@ -7,6 +7,7 @@ set(P3DEADREC_SOURCES
     smoothMover.cxx)
 
 add_library(p3deadrec ${P3DEADREC_HEADERS} ${P3DEADREC_SOURCES})
+set_target_properties(p3deadrec PROPERTIES DEFINE_SYMBOL BUILDING_DIRECT_DEADREC)
 target_link_libraries(p3deadrec p3directbase p3linmath p3pgraph p3prc)
 target_interrogate(p3deadrec ALL)
 
diff --git a/direct/src/distributed/CMakeLists.txt b/direct/src/distributed/CMakeLists.txt
index a04ba893a4..6b2803a7df 100644
--- a/direct/src/distributed/CMakeLists.txt
+++ b/direct/src/distributed/CMakeLists.txt
@@ -12,6 +12,7 @@ if(HAVE_PYTHON)
       cDistributedSmoothNodeBase.cxx)
 
   add_library(p3distributed ${P3DISTRIBUTED_HEADERS} ${P3DISTRIBUTED_SOURCES})
+  set_target_properties(p3distributed PROPERTIES DEFINE_SYMBOL BUILDING_DIRECT_DISTRIBUTED)
   set_target_properties(p3distributed PROPERTIES COMPILE_DEFINITIONS WITHIN_PANDA)
   target_link_libraries(p3distributed p3directbase p3dcparser p3pgraph)
   target_use_packages(p3distributed PYTHON)
diff --git a/direct/src/interval/CMakeLists.txt b/direct/src/interval/CMakeLists.txt
index 346222657e..3ac8beea25 100644
--- a/direct/src/interval/CMakeLists.txt
+++ b/direct/src/interval/CMakeLists.txt
@@ -37,6 +37,7 @@ set(P3INTERVAL_SOURCES
 
 composite_sources(p3interval P3INTERVAL_SOURCES)
 add_library(p3interval ${P3INTERVAL_HEADERS} ${P3INTERVAL_SOURCES})
+set_target_properties(p3interval PROPERTIES DEFINE_SYMBOL BUILDING_DIRECT_INTERVAL)
 target_link_libraries(p3interval p3directbase p3pstatclient p3pgraph p3chan p3dconfig p3prc)
 target_interrogate(p3interval ALL)
 
diff --git a/direct/src/showbase/CMakeLists.txt b/direct/src/showbase/CMakeLists.txt
index 879a23918e..3e7018fe33 100644
--- a/direct/src/showbase/CMakeLists.txt
+++ b/direct/src/showbase/CMakeLists.txt
@@ -1,4 +1,5 @@
 add_library(p3showbase showBase.cxx showBase.h)
+set_target_properties(p3showbase PROPERTIES DEFINE_SYMBOL BUILDING_DIRECT_SHOWBASE)
 target_link_libraries(p3showbase p3directbase p3express p3event p3chan p3display p3dconfig p3prc)
 target_interrogate(p3showbase ALL)
 
diff --git a/dtool/src/dconfig/CMakeLists.txt b/dtool/src/dconfig/CMakeLists.txt
index 9a4280f7a7..642619c0b9 100644
--- a/dtool/src/dconfig/CMakeLists.txt
+++ b/dtool/src/dconfig/CMakeLists.txt
@@ -7,6 +7,7 @@ set(P3DCONFIG_SOURCES
 composite_sources(p3dconfig P3DCONFIG_SOURCES)
 
 add_library(p3dconfig ${P3DCONFIG_HEADERS} ${P3DCONFIG_SOURCES})
+set_target_properties(p3dconfig PROPERTIES DEFINE_SYMBOL BUILDING_DTOOL_DCONFIG)
 target_link_libraries(p3dconfig p3prc)
 
 install(TARGETS p3dconfig DESTINATION lib)
diff --git a/dtool/src/dtoolbase/CMakeLists.txt b/dtool/src/dtoolbase/CMakeLists.txt
index 29605d602e..7e7f1fd3cd 100644
--- a/dtool/src/dtoolbase/CMakeLists.txt
+++ b/dtool/src/dtoolbase/CMakeLists.txt
@@ -70,6 +70,7 @@ set(P3DTOOLBASE_IGATEEXT
 composite_sources(p3dtoolbase P3DTOOLBASE_SOURCES)
 
 add_library(p3dtoolbase	${P3DTOOLBASE_HEADERS} ${P3DTOOLBASE_SOURCES})
+set_target_properties(p3dtoolbase PROPERTIES DEFINE_SYMBOL BUILDING_DTOOL_DTOOLBASE)
 # The extensions need py_panda.h and extension.h from interrogatedb
 target_include_directories(p3dtoolbase PUBLIC
   $<TARGET_PROPERTY:p3interrogatedb,INTERFACE_INCLUDE_DIRECTORIES>)
diff --git a/dtool/src/dtoolutil/CMakeLists.txt b/dtool/src/dtoolutil/CMakeLists.txt
index de5e45581d..6b0a72e248 100644
--- a/dtool/src/dtoolutil/CMakeLists.txt
+++ b/dtool/src/dtoolutil/CMakeLists.txt
@@ -72,6 +72,7 @@ set(P3DTOOLUTIL_IGATEEXT
 composite_sources(p3dtoolutil P3DTOOLUTIL_SOURCES)
 
 add_library(p3dtoolutil ${P3DTOOLUTIL_HEADERS} ${P3DTOOLUTIL_SOURCES})
+set_target_properties(p3dtoolutil PROPERTIES DEFINE_SYMBOL BUILDING_DTOOL_DTOOLUTIL)
 # The extensions need py_panda.h and extension.h from interrogatedb
 target_include_directories(p3dtoolutil PUBLIC
   $<TARGET_PROPERTY:p3interrogatedb,INTERFACE_INCLUDE_DIRECTORIES>)
diff --git a/dtool/src/prc/CMakeLists.txt b/dtool/src/prc/CMakeLists.txt
index 474680e486..e295f1fa37 100644
--- a/dtool/src/prc/CMakeLists.txt
+++ b/dtool/src/prc/CMakeLists.txt
@@ -71,6 +71,7 @@ set(P3PRC_IGATEEXT
 composite_sources(p3prc P3PRC_SOURCES)
 
 add_library(p3prc ${P3PRC_HEADERS} ${P3PRC_SOURCES})
+set_target_properties(p3prc PROPERTIES DEFINE_SYMBOL BUILDING_DTOOL_PRC)
 # The extensions need py_panda.h and extension.h from interrogatedb
 target_include_directories(p3prc PUBLIC
   $<TARGET_PROPERTY:p3interrogatedb,INTERFACE_INCLUDE_DIRECTORIES>)
diff --git a/panda/metalibs/panda/CMakeLists.txt b/panda/metalibs/panda/CMakeLists.txt
index 06ac3b525a..ad9651bca3 100644
--- a/panda/metalibs/panda/CMakeLists.txt
+++ b/panda/metalibs/panda/CMakeLists.txt
@@ -1,4 +1,3 @@
-add_definitions(-DBUILDING_PANDA)
 set(PANDA_LINK_TARGETS
     p3chan p3char p3collide p3cull p3device p3dgraph p3display p3downloader p3dxml
     p3event p3express p3gobj p3grutil p3gsgbase p3linmath p3mathutil p3nativenet
@@ -21,6 +20,7 @@ if(LINK_IN_PHYSX)
 endif()
 
 add_library(panda panda.cxx)
+set_target_properties(panda PROPERTIES DEFINE_SYMBOL BUILDING_LIBPANDA)
 target_link_libraries(panda ${PANDA_LINK_TARGETS})
 
 install(TARGETS panda DESTINATION lib)
diff --git a/panda/src/audio/CMakeLists.txt b/panda/src/audio/CMakeLists.txt
index b382e1ab8c..ca7f6d941b 100644
--- a/panda/src/audio/CMakeLists.txt
+++ b/panda/src/audio/CMakeLists.txt
@@ -19,6 +19,7 @@ if(HAVE_AUDIO)
 
   composite_sources(p3audio P3AUDIO_SOURCES)
   add_library(p3audio ${P3AUDIO_HEADERS} ${P3AUDIO_SOURCES})
+  set_target_properties(p3audio PROPERTIES DEFINE_SYMBOL BUILDING_PANDA_AUDIO)
   target_link_libraries(p3audio p3putil p3event p3movies p3linmath)
   target_interrogate(p3audio ALL)
 
diff --git a/panda/src/audiotraits/CMakeLists.txt b/panda/src/audiotraits/CMakeLists.txt
index 52d090e794..9084f8e70d 100644
--- a/panda/src/audiotraits/CMakeLists.txt
+++ b/panda/src/audiotraits/CMakeLists.txt
@@ -18,6 +18,7 @@ if(HAVE_AUDIO)
     composite_sources(p3miles_audio P3MILES_SOURCES)
     include_directories(${MILES_INCLUDE_DIR})
     add_library(p3miles_audio ${P3MILES_HEADERS} ${P3MILES_SOURCES})
+    set_target_properties(p3miles_audio PROPERTIES DEFINE_SYMBOL BUILDING_MILES_AUDIO)
     target_link_libraries(p3miles_audio p3audio p3event p3pipeline)
     target_use_packages(p3miles_audio MILES)
 
@@ -36,6 +37,7 @@ if(HAVE_AUDIO)
     composite_sources(p3fmod_audio P3FMOD_SOURCES)
     include_directories(${FMODEX_INCLUDE_DIR})
     add_library(p3fmod_audio ${P3FMOD_HEADERS} ${P3FMOD_SOURCES})
+    set_target_properties(p3fmod_audio PROPERTIES DEFINE_SYMBOL BUILDING_FMOD_AUDIO)
     target_link_libraries(p3fmod_audio p3audio p3event)
     target_use_packages(p3fmod_audio FMODEX)
 
@@ -55,6 +57,7 @@ if(HAVE_AUDIO)
     composite_sources(p3openal_audio P3OPENAL_SOURCES)
     include_directories(${OPENAL_INCLUDE_DIR})
     add_library(p3openal_audio ${P3OPENAL_HEADERS} ${P3OPENAL_SOURCES})
+    set_target_properties(p3openal_audio PROPERTIES DEFINE_SYMBOL BUILDING_OPENAL_AUDIO)
     target_link_libraries(p3openal_audio p3audio p3event)
     target_use_packages(p3openal_audio OPENAL)
 
diff --git a/panda/src/chan/CMakeLists.txt b/panda/src/chan/CMakeLists.txt
index 2a1522b0d7..add157fd3b 100644
--- a/panda/src/chan/CMakeLists.txt
+++ b/panda/src/chan/CMakeLists.txt
@@ -54,6 +54,7 @@ set(P3CHAN_SOURCES
 
 composite_sources(p3chan P3CHAN_SOURCES)
 add_library(p3chan ${P3CHAN_HEADERS} ${P3CHAN_SOURCES})
+set_target_properties(p3chan PROPERTIES DEFINE_SYMBOL BUILDING_PANDA_CHAN)
 target_link_libraries(p3chan p3pgraph)
 target_interrogate(p3chan ALL)
 
diff --git a/panda/src/char/CMakeLists.txt b/panda/src/char/CMakeLists.txt
index fa4af297d2..752ddc2307 100644
--- a/panda/src/char/CMakeLists.txt
+++ b/panda/src/char/CMakeLists.txt
@@ -20,6 +20,7 @@ set(P3CHAR_SOURCES
 
 composite_sources(p3char P3CHAR_SOURCES)
 add_library(p3char ${P3CHAR_HEADERS} ${P3CHAR_SOURCES})
+set_target_properties(p3char PROPERTIES DEFINE_SYMBOL BUILDING_PANDA_CHAR)
 target_link_libraries(p3char p3chan)
 target_interrogate(p3char ALL)
 
diff --git a/panda/src/cocoadisplay/CMakeLists.txt b/panda/src/cocoadisplay/CMakeLists.txt
index 90bf13cf95..7d5d5f1bd7 100644
--- a/panda/src/cocoadisplay/CMakeLists.txt
+++ b/panda/src/cocoadisplay/CMakeLists.txt
@@ -19,6 +19,7 @@ if(APPLE AND HAVE_GL AND HAVE_COCOA)
 
   #composite_sources(p3cocoadisplay P3COCOADISPLAY_SOURCES)
   add_library(p3cocoadisplay ${P3COCOADISPLAY_HEADERS} ${P3COCOADISPLAY_SOURCES})
+  set_target_properties(p3cocoadisplay PROPERTIES DEFINE_SYMBOL BUILDING_PANDAGL)
   target_link_libraries(p3cocoadisplay p3display p3putil p3glgsg)
 
   # Frameworks:
diff --git a/panda/src/collide/CMakeLists.txt b/panda/src/collide/CMakeLists.txt
index e8c511531c..7308b23a8c 100644
--- a/panda/src/collide/CMakeLists.txt
+++ b/panda/src/collide/CMakeLists.txt
@@ -64,6 +64,7 @@ set(P3COLLIDE_SOURCES
 
 composite_sources(p3collide P3COLLIDE_SOURCES)
 add_library(p3collide ${P3COLLIDE_HEADERS} ${P3COLLIDE_SOURCES})
+set_target_properties(p3collide PROPERTIES DEFINE_SYMBOL BUILDING_PANDA_COLLIDE)
 target_link_libraries(p3collide p3tform)
 target_interrogate(p3collide ALL)
 
diff --git a/panda/src/cull/CMakeLists.txt b/panda/src/cull/CMakeLists.txt
index 22e0e6d1a9..dc01cb1768 100644
--- a/panda/src/cull/CMakeLists.txt
+++ b/panda/src/cull/CMakeLists.txt
@@ -22,6 +22,7 @@ set(P3CULL_SOURCES
 
 composite_sources(p3cull P3CULL_SOURCES)
 add_library(p3cull ${P3CULL_HEADERS} ${P3CULL_SOURCES})
+set_target_properties(p3cull PROPERTIES DEFINE_SYMBOL BUILDING_PANDA_CULL)
 target_link_libraries(p3cull p3pgraph)
 target_interrogate(p3cull ALL)
 
diff --git a/panda/src/device/CMakeLists.txt b/panda/src/device/CMakeLists.txt
index 5e2daf8d23..73cf7a5712 100644
--- a/panda/src/device/CMakeLists.txt
+++ b/panda/src/device/CMakeLists.txt
@@ -28,6 +28,7 @@ set(P3DEVICE_SOURCES
 
 composite_sources(p3device P3DEVICE_SOURCES)
 add_library(p3device ${P3DEVICE_HEADERS} ${P3DEVICE_SOURCES})
+set_target_properties(p3device PROPERTIES DEFINE_SYMBOL BUILDING_PANDA_DEVICE)
 target_link_libraries(p3device p3dgraph p3display)
 target_interrogate(p3device ALL)
 
diff --git a/panda/src/dgraph/CMakeLists.txt b/panda/src/dgraph/CMakeLists.txt
index 2be765d73a..a1eaeb484f 100644
--- a/panda/src/dgraph/CMakeLists.txt
+++ b/panda/src/dgraph/CMakeLists.txt
@@ -13,6 +13,7 @@ set(P3DGRAPH_SOURCES
 
 composite_sources(p3dgraph P3DGRAPH_SOURCES)
 add_library(p3dgraph ${P3DGRAPH_HEADERS} ${P3DGRAPH_SOURCES})
+set_target_properties(p3dgraph PROPERTIES DEFINE_SYMBOL BUILDING_PANDA_DGRAPH)
 target_link_libraries(p3dgraph p3pgraph)
 target_interrogate(p3dgraph ALL)
 
diff --git a/panda/src/display/CMakeLists.txt b/panda/src/display/CMakeLists.txt
index c4d562692c..3bb1c5d795 100644
--- a/panda/src/display/CMakeLists.txt
+++ b/panda/src/display/CMakeLists.txt
@@ -88,6 +88,7 @@ endif()
 
 composite_sources(p3display P3DISPLAY_SOURCES)
 add_library(p3display ${P3DISPLAY_HEADERS} ${P3DISPLAY_SOURCES})
+set_target_properties(p3display PROPERTIES DEFINE_SYMBOL BUILDING_PANDA_DISPLAY)
 target_link_libraries(p3display p3cull p3pgraphnodes)
 target_interrogate(p3display ALL EXTENSIONS ${P3DISPLAY_IGATEEXT})
 
diff --git a/panda/src/downloader/CMakeLists.txt b/panda/src/downloader/CMakeLists.txt
index f6a4917ba0..63ac5da787 100644
--- a/panda/src/downloader/CMakeLists.txt
+++ b/panda/src/downloader/CMakeLists.txt
@@ -69,6 +69,7 @@ set(P3DOWNLOADER_IGATEEXT
 
 composite_sources(p3downloader P3DOWNLOADER_SOURCES)
 add_library(p3downloader ${P3DOWNLOADER_HEADERS} ${P3DOWNLOADER_SOURCES})
+set_target_properties(p3downloader PROPERTIES DEFINE_SYMBOL BUILDING_PANDAEXPRESS)
 target_link_libraries(p3downloader p3express p3pipeline)
 target_interrogate(p3downloader ALL EXTENSIONS ${P3DOWNLOADER_IGATEEXT})
 
diff --git a/panda/src/dxml/CMakeLists.txt b/panda/src/dxml/CMakeLists.txt
index 1ed083a8e0..8da15454d7 100644
--- a/panda/src/dxml/CMakeLists.txt
+++ b/panda/src/dxml/CMakeLists.txt
@@ -13,6 +13,7 @@ set(P3DXML_SOURCES
 composite_sources(p3dxml P3DXML_SOURCES)
 add_definitions(-DTIXML_USE_STL)
 add_library(p3dxml ${P3DXML_HEADERS} ${P3DXML_SOURCES})
+set_target_properties(p3dxml PROPERTIES DEFINE_SYMBOL BUILDING_PANDA_DXML)
 target_link_libraries(p3dxml p3express)
 target_interrogate(p3dxml ALL)
 
diff --git a/panda/src/egg/CMakeLists.txt b/panda/src/egg/CMakeLists.txt
index 08f881044f..0da2748074 100644
--- a/panda/src/egg/CMakeLists.txt
+++ b/panda/src/egg/CMakeLists.txt
@@ -100,6 +100,7 @@ if(HAVE_EGG)
 
   composite_sources(p3egg P3EGG_SOURCES)
   add_library(p3egg ${P3EGG_HEADERS} ${P3EGG_SOURCES} ${P3EGG_PARSER_SOURCES})
+  set_target_properties(p3egg PROPERTIES DEFINE_SYMBOL BUILDING_PANDAEGG)
   target_link_libraries(p3egg p3prc p3pandabase p3express p3linmath p3mathutil)
   target_interrogate(p3egg ${P3EGG_HEADERS} ${P3EGG_SOURCES} EXTENSIONS ${P3EGG_IGATEEXT})
 
diff --git a/panda/src/egg2pg/CMakeLists.txt b/panda/src/egg2pg/CMakeLists.txt
index c7b23c8acf..9e0e038476 100644
--- a/panda/src/egg2pg/CMakeLists.txt
+++ b/panda/src/egg2pg/CMakeLists.txt
@@ -31,6 +31,7 @@ if(HAVE_EGG)
 
   composite_sources(p3egg2pg P3EGG2PG_SOURCES)
   add_library(p3egg2pg ${P3EGG2PG_HEADERS} ${P3EGG2PG_SOURCES})
+  set_target_properties(p3egg2pg PROPERTIES DEFINE_SYMBOL BUILDING_PANDAEGG)
   target_link_libraries(p3egg2pg p3parametrics p3collide p3egg p3pgraph p3chan p3char)
   target_interrogate(p3egg2pg ALL)
 
diff --git a/panda/src/event/CMakeLists.txt b/panda/src/event/CMakeLists.txt
index c29fa3bcd8..3857ceb704 100644
--- a/panda/src/event/CMakeLists.txt
+++ b/panda/src/event/CMakeLists.txt
@@ -46,6 +46,7 @@ set(P3EVENT_IGATEEXT
 
 composite_sources(p3event P3EVENT_SOURCES)
 add_library(p3event ${P3EVENT_HEADERS} ${P3EVENT_SOURCES})
+set_target_properties(p3event PROPERTIES DEFINE_SYMBOL BUILDING_PANDA_EVENT)
 target_link_libraries(p3event p3linmath p3pstatclient)
 target_interrogate(p3event ALL EXTENSIONS ${P3EVENT_IGATEEXT})
 
diff --git a/panda/src/express/CMakeLists.txt b/panda/src/express/CMakeLists.txt
index 7fa891c805..2319c79c81 100644
--- a/panda/src/express/CMakeLists.txt
+++ b/panda/src/express/CMakeLists.txt
@@ -145,6 +145,7 @@ set(P3EXPRESS_IGATEEXT
 composite_sources(p3express P3EXPRESS_SOURCES)
 
 add_library(p3express ${P3EXPRESS_SOURCES} ${P3EXPRESS_HEADERS})
+set_target_properties(p3express PROPERTIES DEFINE_SYMBOL BUILDING_PANDAEXPRESS)
 
 # p3express needs to include from p3interrogatedb for py_panda.h and extension.h
 target_include_directories(p3express PUBLIC
diff --git a/panda/src/ffmpeg/CMakeLists.txt b/panda/src/ffmpeg/CMakeLists.txt
index b8a41c2b6e..5b3ae8c396 100644
--- a/panda/src/ffmpeg/CMakeLists.txt
+++ b/panda/src/ffmpeg/CMakeLists.txt
@@ -19,6 +19,7 @@ if(HAVE_FFMPEG)
 
   composite_sources(p3ffmpeg P3FFMPEG_SOURCES)
   add_library(p3ffmpeg ${P3FFMPEG_HEADERS} ${P3FFMPEG_SOURCES})
+  set_target_properties(p3ffmpeg PROPERTIES DEFINE_SYMBOL BUILDING_FFMPEG)
   target_link_libraries(p3ffmpeg p3movies)
   target_use_packages(p3ffmpeg FFMPEG SWSCALE SWRESAMPLE)
 
diff --git a/panda/src/framework/CMakeLists.txt b/panda/src/framework/CMakeLists.txt
index a2444365a1..3a969ca746 100644
--- a/panda/src/framework/CMakeLists.txt
+++ b/panda/src/framework/CMakeLists.txt
@@ -47,6 +47,7 @@ endif()
 
 composite_sources(p3framework P3FRAMEWORK_SOURCES)
 add_library(p3framework ${P3FRAMEWORK_HEADERS} ${P3FRAMEWORK_SOURCES})
+set_target_properties(p3framework PROPERTIES DEFINE_SYMBOL BUILDING_FRAMEWORK)
 target_link_libraries(p3framework ${P3FRAMEWORK_LINK_TARGETS})
 
 install(TARGETS p3framework DESTINATION lib)
diff --git a/panda/src/glgsg/CMakeLists.txt b/panda/src/glgsg/CMakeLists.txt
index d3c5567281..87192401e4 100644
--- a/panda/src/glgsg/CMakeLists.txt
+++ b/panda/src/glgsg/CMakeLists.txt
@@ -10,6 +10,7 @@ if(HAVE_GL)
 
   composite_sources(p3glgsg P3GLGSG_SOURCES)
   add_library(p3glgsg ${P3GLGSG_HEADERS} ${P3GLGSG_SOURCES})
+  set_target_properties(p3glgsg PROPERTIES DEFINE_SYMBOL BUILDING_PANDAGL)
   target_link_libraries(p3glgsg p3glstuff p3display
     ${OPENGL_LIBRARIES})
   target_use_packages(p3glgsg CG)
diff --git a/panda/src/glxdisplay/CMakeLists.txt b/panda/src/glxdisplay/CMakeLists.txt
index b7f6019786..3525402f91 100644
--- a/panda/src/glxdisplay/CMakeLists.txt
+++ b/panda/src/glxdisplay/CMakeLists.txt
@@ -22,6 +22,7 @@ if(HAVE_GLX)
 
   composite_sources(p3glxdisplay P3GLXDISPLAY_SOURCES)
   add_library(p3glxdisplay ${P3GLXDISPLAY_HEADERS} ${P3GLXDISPLAY_SOURCES})
+  set_target_properties(p3glxdisplay PROPERTIES DEFINE_SYMBOL BUILDING_PANDAGL)
   target_link_libraries(p3glxdisplay p3glgsg p3x11display)
 
   install(TARGETS p3glxdisplay DESTINATION lib)
diff --git a/panda/src/gobj/CMakeLists.txt b/panda/src/gobj/CMakeLists.txt
index e308ba8c6d..5f6a6749c5 100644
--- a/panda/src/gobj/CMakeLists.txt
+++ b/panda/src/gobj/CMakeLists.txt
@@ -169,6 +169,7 @@ set(P3GOBJ_IGATEEXT
 
 composite_sources(p3gobj P3GOBJ_SOURCES)
 add_library(p3gobj ${P3GOBJ_HEADERS} ${P3GOBJ_SOURCES})
+set_target_properties(p3gobj PROPERTIES DEFINE_SYMBOL BUILDING_PANDA_GOBJ)
 target_link_libraries(p3gobj p3gsgbase p3pnmimage)
 target_use_packages(p3gobj ZLIB SQUISH CG)
 target_interrogate(p3gobj ALL EXTENSIONS ${P3GOBJ_IGATEEXT})
diff --git a/panda/src/grutil/CMakeLists.txt b/panda/src/grutil/CMakeLists.txt
index 38c21a3c2c..17cf54ca5c 100644
--- a/panda/src/grutil/CMakeLists.txt
+++ b/panda/src/grutil/CMakeLists.txt
@@ -39,6 +39,7 @@ set(P3GRUTIL_SOURCES
 
 composite_sources(p3grutil P3GRUTIL_SOURCES)
 add_library(p3grutil ${P3GRUTIL_HEADERS} ${P3GRUTIL_SOURCES})
+set_target_properties(p3grutil PROPERTIES DEFINE_SYMBOL BUILDING_PANDA_GRUTIL)
 target_link_libraries(p3grutil p3display p3text p3movies)
 if(HAVE_AUDIO)
   target_link_libraries(p3grutil p3audio)
diff --git a/panda/src/gsgbase/CMakeLists.txt b/panda/src/gsgbase/CMakeLists.txt
index 37f54fe4b9..97e492c4ca 100644
--- a/panda/src/gsgbase/CMakeLists.txt
+++ b/panda/src/gsgbase/CMakeLists.txt
@@ -12,6 +12,7 @@ set(P3GSGBASE_SOURCES
 
 composite_sources(p3gsgbase P3GSGBASE_SOURCES)
 add_library(p3gsgbase ${P3GSGBASE_HEADERS} ${P3GSGBASE_SOURCES})
+set_target_properties(p3gsgbase PROPERTIES DEFINE_SYMBOL BUILDING_PANDA_GSGBASE)
 target_link_libraries(p3gsgbase p3putil p3linmath)
 target_interrogate(p3gsgbase ALL)
 
diff --git a/panda/src/linmath/CMakeLists.txt b/panda/src/linmath/CMakeLists.txt
index be9d1dcfa5..b2211657ca 100644
--- a/panda/src/linmath/CMakeLists.txt
+++ b/panda/src/linmath/CMakeLists.txt
@@ -45,6 +45,7 @@ set(P3LINMATH_SOURCES
 
 composite_sources(p3linmath P3LINMATH_SOURCES)
 add_library(p3linmath ${P3LINMATH_HEADERS} ${P3LINMATH_SOURCES})
+set_target_properties(p3linmath PROPERTIES DEFINE_SYMBOL BUILDING_PANDA_LINMATH)
 target_link_libraries(p3linmath p3express p3pandabase)
 target_use_packages(p3linmath EIGEN)
 target_interrogate(p3linmath ALL)
diff --git a/panda/src/mathutil/CMakeLists.txt b/panda/src/mathutil/CMakeLists.txt
index fcc9f55dea..90fcd5fccd 100644
--- a/panda/src/mathutil/CMakeLists.txt
+++ b/panda/src/mathutil/CMakeLists.txt
@@ -62,6 +62,7 @@ set(P3MATHUTIL_SOURCES
 
 composite_sources(p3mathutil P3MATHUTIL_SOURCES)
 add_library(p3mathutil ${P3MATHUTIL_HEADERS} ${P3MATHUTIL_SOURCES})
+set_target_properties(p3mathutil PROPERTIES DEFINE_SYMBOL BUILDING_PANDA_MATHUTIL)
 target_link_libraries(p3mathutil p3event)
 target_use_packages(p3mathutil FFTW)
 target_interrogate(p3mathutil ALL)
diff --git a/panda/src/movies/CMakeLists.txt b/panda/src/movies/CMakeLists.txt
index 21273d25d6..e5dabb63a8 100644
--- a/panda/src/movies/CMakeLists.txt
+++ b/panda/src/movies/CMakeLists.txt
@@ -43,6 +43,7 @@ set(P3MOVIES_SOURCES
 
 composite_sources(p3movies P3MOVIES_SOURCES)
 add_library(p3movies ${P3MOVIES_HEADERS} ${P3MOVIES_SOURCES})
+set_target_properties(p3movies PROPERTIES DEFINE_SYMBOL BUILDING_PANDA_MOVIES)
 target_link_libraries(p3movies p3pandabase p3express p3pstatclient p3gobj p3dconfig p3prc)
 target_interrogate(p3movies ALL)
 
diff --git a/panda/src/nativenet/CMakeLists.txt b/panda/src/nativenet/CMakeLists.txt
index ce3cb8191e..8c3a1b4b1f 100644
--- a/panda/src/nativenet/CMakeLists.txt
+++ b/panda/src/nativenet/CMakeLists.txt
@@ -26,6 +26,7 @@ if(WANT_NATIVE_NET)
 
   composite_sources(p3nativenet P3NATIVENET_SOURCES)
   add_library(p3nativenet ${P3NATIVENET_HEADERS} ${P3NATIVENET_SOURCES})
+  set_target_properties(p3nativenet PROPERTIES DEFINE_SYMBOL BUILDING_PANDA_NATIVENET)
   target_link_libraries(p3nativenet p3express p3pandabase p3downloader)
   target_interrogate(p3nativenet ALL)
 
diff --git a/panda/src/net/CMakeLists.txt b/panda/src/net/CMakeLists.txt
index c119cea610..9a2eca80c9 100644
--- a/panda/src/net/CMakeLists.txt
+++ b/panda/src/net/CMakeLists.txt
@@ -27,6 +27,7 @@ if(HAVE_NET AND WANT_NATIVE_NET)
 
   composite_sources(p3net P3NET_SOURCES)
   add_library(p3net ${P3NET_HEADERS} ${P3NET_SOURCES})
+  set_target_properties(p3net PROPERTIES DEFINE_SYMBOL BUILDING_PANDA_NET)
   target_link_libraries(p3net p3express p3downloader p3pandabase p3nativenet p3pipeline)
   target_interrogate(p3net ALL)
 
diff --git a/panda/src/ode/CMakeLists.txt b/panda/src/ode/CMakeLists.txt
index b5ed1e9840..edca403ec1 100644
--- a/panda/src/ode/CMakeLists.txt
+++ b/panda/src/ode/CMakeLists.txt
@@ -82,6 +82,7 @@ if(HAVE_ODE)
 
   composite_sources(p3ode P3ODE_SOURCES)
   add_library(p3ode ${P3ODE_SOURCES} ${P3ODE_HEADERS})
+  set_target_properties(p3ode PROPERTIES DEFINE_SYMBOL BUILDING_PANDAODE)
   set_target_properties(p3ode PROPERTIES COMPILE_DEFINITIONS dSINGLE)
   target_link_libraries(p3ode p3pgraph p3physics ${ODE_LIBRARY})
   target_interrogate(p3ode ${P3ODE_IGATE_SOURCES} EXTENSIONS ${P3ODE_IGATEEXT})
diff --git a/panda/src/osxdisplay/CMakeLists.txt b/panda/src/osxdisplay/CMakeLists.txt
index 8727804cdd..ac03c9620d 100644
--- a/panda/src/osxdisplay/CMakeLists.txt
+++ b/panda/src/osxdisplay/CMakeLists.txt
@@ -11,6 +11,7 @@ if(APPLE AND HAVE_GL AND HAVE_CARBON)
 
   composite_sources(p3osxdisplay P3OSXDISPLAY_SOURCES)
   add_library(p3osxdisplay ${P3OSXDISPLAY_HEADERS} ${P3OSXDISPLAY_SOURCES})
+  set_target_properties(p3osxdisplay PROPERTIES DEFINE_SYMBOL BUILDING_PANDAGL)
   target_link_libraries(p3osxdisplay p3display p3putil p3glgsg)
 
   # Frameworks:
diff --git a/panda/src/parametrics/CMakeLists.txt b/panda/src/parametrics/CMakeLists.txt
index 8e214964c5..6b5e9a0337 100644
--- a/panda/src/parametrics/CMakeLists.txt
+++ b/panda/src/parametrics/CMakeLists.txt
@@ -35,6 +35,7 @@ set(P3PARAMETRICS_SOURCES
 
 composite_sources(p3parametrics P3PARAMETRICS_SOURCES)
 add_library(p3parametrics ${P3PARAMETRICS_HEADERS} ${P3PARAMETRICS_SOURCES})
+set_target_properties(p3parametrics PROPERTIES DEFINE_SYMBOL BUILDING_PANDA_PARAMETRICS)
 target_link_libraries(p3parametrics p3pgraph)
 target_interrogate(p3parametrics ALL)
 
diff --git a/panda/src/particlesystem/CMakeLists.txt b/panda/src/particlesystem/CMakeLists.txt
index 75b970d4bd..bbd2818582 100644
--- a/panda/src/particlesystem/CMakeLists.txt
+++ b/panda/src/particlesystem/CMakeLists.txt
@@ -39,6 +39,7 @@ set(P3PARTICLESYSTEM_SOURCES
 
 composite_sources(p3particlesystem P3PARTICLESYSTEM_SOURCES)
 add_library(p3particlesystem ${P3PARTICLESYSTEM_HEADERS} ${P3PARTICLESYSTEM_SOURCES})
+set_target_properties(p3particlesystem PROPERTIES DEFINE_SYMBOL BUILDING_PANDAPHYSICS)
 target_link_libraries(p3particlesystem p3pgraph p3physics)
 target_interrogate(p3particlesystem ALL)
 
diff --git a/panda/src/pgraph/CMakeLists.txt b/panda/src/pgraph/CMakeLists.txt
index 7d88a7adca..a6830270ea 100644
--- a/panda/src/pgraph/CMakeLists.txt
+++ b/panda/src/pgraph/CMakeLists.txt
@@ -218,6 +218,7 @@ set(P3PGRAPH_IGATEEXT
 
 composite_sources(p3pgraph P3PGRAPH_SOURCES)
 add_library(p3pgraph ${P3PGRAPH_HEADERS} ${P3PGRAPH_SOURCES})
+set_target_properties(p3pgraph PROPERTIES DEFINE_SYMBOL BUILDING_PANDA_PGRAPH)
 target_link_libraries(p3pgraph p3gobj p3event p3gsgbase p3putil p3linmath p3downloader)
 target_interrogate(p3pgraph ALL EXTENSIONS ${P3PGRAPH_IGATEEXT})
 
diff --git a/panda/src/pgraphnodes/CMakeLists.txt b/panda/src/pgraphnodes/CMakeLists.txt
index b1c745838f..f33280dffe 100644
--- a/panda/src/pgraphnodes/CMakeLists.txt
+++ b/panda/src/pgraphnodes/CMakeLists.txt
@@ -46,6 +46,7 @@ set(P3PGRAPHNODES_SOURCES
 
 composite_sources(p3pgraphnodes P3PGRAPHNODES_SOURCES)
 add_library(p3pgraphnodes ${P3PGRAPHNODES_HEADERS} ${P3PGRAPHNODES_SOURCES})
+set_target_properties(p3pgraphnodes PROPERTIES DEFINE_SYMBOL BUILDING_PANDA_PGRAPHNODES)
 target_link_libraries(p3pgraphnodes p3pgraph)
 target_interrogate(p3pgraphnodes ALL)
 
diff --git a/panda/src/pgui/CMakeLists.txt b/panda/src/pgui/CMakeLists.txt
index d7d425a087..129536eaa9 100644
--- a/panda/src/pgui/CMakeLists.txt
+++ b/panda/src/pgui/CMakeLists.txt
@@ -41,6 +41,7 @@ set(P3PGUI_SOURCES
 
 composite_sources(p3pgui P3PGUI_SOURCES)
 add_library(p3pgui ${P3PGUI_HEADERS} ${P3PGUI_SOURCES})
+set_target_properties(p3pgui PROPERTIES DEFINE_SYMBOL BUILDING_PANDA_PGUI)
 target_link_libraries(p3pgui p3tform)
 target_interrogate(p3pgui ALL)
 
diff --git a/panda/src/physics/CMakeLists.txt b/panda/src/physics/CMakeLists.txt
index c74b40e6de..06b4f999c6 100644
--- a/panda/src/physics/CMakeLists.txt
+++ b/panda/src/physics/CMakeLists.txt
@@ -37,6 +37,7 @@ set(P3PHYSICS_SOURCES
 
 composite_sources(p3physics P3PHYSICS_SOURCES)
 add_library(p3physics ${P3PHYSICS_HEADERS} ${P3PHYSICS_SOURCES})
+set_target_properties(p3physics PROPERTIES DEFINE_SYMBOL BUILDING_PANDAPHYSICS)
 target_link_libraries(p3physics p3pgraph p3linmath p3collide)
 target_interrogate(p3physics ALL)
 
diff --git a/panda/src/pipeline/CMakeLists.txt b/panda/src/pipeline/CMakeLists.txt
index a2c2abb089..a36f01dc1e 100644
--- a/panda/src/pipeline/CMakeLists.txt
+++ b/panda/src/pipeline/CMakeLists.txt
@@ -129,6 +129,7 @@ set(P3PIPELINE_IGATEEXT
 
 composite_sources(p3pipeline P3PIPELINE_SOURCES)
 add_library(p3pipeline ${P3PIPELINE_HEADERS} ${P3PIPELINE_SOURCES})
+set_target_properties(p3pipeline PROPERTIES DEFINE_SYMBOL BUILDING_PANDA_PIPELINE)
 target_link_libraries(p3pipeline p3express)
 target_interrogate(p3pipeline ALL EXTENSIONS ${P3PIPELINE_IGATEEXT})
 
diff --git a/panda/src/pnmimage/CMakeLists.txt b/panda/src/pnmimage/CMakeLists.txt
index 1cf9cc11b3..2865296c74 100644
--- a/panda/src/pnmimage/CMakeLists.txt
+++ b/panda/src/pnmimage/CMakeLists.txt
@@ -36,6 +36,7 @@ endif()
 
 composite_sources(p3pnmimage P3PNMIMAGE_SOURCES)
 add_library(p3pnmimage ${P3PNMIMAGE_HEADERS} ${P3PNMIMAGE_SOURCES} convert_srgb_sse2.cxx)
+set_target_properties(p3pnmimage PROPERTIES DEFINE_SYMBOL BUILDING_PANDA_PNMIMAGE)
 target_link_libraries(p3pnmimage p3mathutil)
 target_interrogate(p3pnmimage ALL EXTENSIONS ${P3PNMIMAGE_IGATEEXT})
 
diff --git a/panda/src/pnmimagetypes/CMakeLists.txt b/panda/src/pnmimagetypes/CMakeLists.txt
index 509d13bd11..21e4f98285 100644
--- a/panda/src/pnmimagetypes/CMakeLists.txt
+++ b/panda/src/pnmimagetypes/CMakeLists.txt
@@ -32,6 +32,7 @@ set(P3PNMIMAGETYPES_SOURCES
 
 composite_sources(p3pnmimagetypes P3PNMIMAGETYPES_SOURCES)
 add_library(p3pnmimagetypes ${P3PNMIMAGETYPES_HEADERS} ${P3PNMIMAGETYPES_SOURCES})
+set_target_properties(p3pnmimagetypes PROPERTIES DEFINE_SYMBOL BUILDING_PANDA_PNMIMAGETYPES)
 target_link_libraries(p3pnmimagetypes p3pnmimage)
 target_use_packages(p3pnmimagetypes JPEG TIFF PNG)
 
diff --git a/panda/src/pnmtext/CMakeLists.txt b/panda/src/pnmtext/CMakeLists.txt
index cfd2a0f24e..3256654fd8 100644
--- a/panda/src/pnmtext/CMakeLists.txt
+++ b/panda/src/pnmtext/CMakeLists.txt
@@ -16,6 +16,7 @@ if(HAVE_FREETYPE)
 
   composite_sources(p3pnmtext P3PNMTEXT_SOURCES)
   add_library(p3pnmtext ${P3PNMTEXT_HEADERS} ${P3PNMTEXT_SOURCES})
+  set_target_properties(p3pnmtext PROPERTIES DEFINE_SYMBOL BUILDING_PANDA_PNMTEXT)
   target_link_libraries(p3pnmtext p3parametrics p3pnmimage)
   target_use_packages(p3pnmtext FREETYPE)
   target_interrogate(p3pnmtext ALL)
diff --git a/panda/src/pstatclient/CMakeLists.txt b/panda/src/pstatclient/CMakeLists.txt
index 701913c88a..82572d3def 100644
--- a/panda/src/pstatclient/CMakeLists.txt
+++ b/panda/src/pstatclient/CMakeLists.txt
@@ -22,6 +22,7 @@ set(P3PSTATCLIENT_SOURCES
 
 composite_sources(p3pstatclient P3PSTATCLIENT_SOURCES)
 add_library(p3pstatclient ${P3PSTATCLIENT_HEADERS} ${P3PSTATCLIENT_SOURCES})
+set_target_properties(p3pstatclient PROPERTIES DEFINE_SYMBOL BUILDING_PANDA_PSTATCLIENT)
 target_link_libraries(p3pstatclient p3net p3putil p3express)
 target_interrogate(p3pstatclient ALL)
 
diff --git a/panda/src/putil/CMakeLists.txt b/panda/src/putil/CMakeLists.txt
index e79254aa7b..f6071a41f7 100644
--- a/panda/src/putil/CMakeLists.txt
+++ b/panda/src/putil/CMakeLists.txt
@@ -125,6 +125,7 @@ set(P3PUTIL_IGATEEXT
 
 composite_sources(p3putil P3PUTIL_SOURCES)
 add_library(p3putil ${P3PUTIL_HEADERS} ${P3PUTIL_SOURCES})
+set_target_properties(p3putil PROPERTIES DEFINE_SYMBOL BUILDING_PANDA_PUTIL)
 target_link_libraries(p3putil p3linmath p3pipeline)
 target_interrogate(p3putil ALL EXTENSIONS ${P3PUTIL_IGATEEXT})
 
diff --git a/panda/src/recorder/CMakeLists.txt b/panda/src/recorder/CMakeLists.txt
index e5258ba0ee..1409685ab7 100644
--- a/panda/src/recorder/CMakeLists.txt
+++ b/panda/src/recorder/CMakeLists.txt
@@ -18,6 +18,7 @@ set(P3RECORDER_SOURCES
 
 composite_sources(p3recorder P3RECORDER_SOURCES)
 add_library(p3recorder ${P3RECORDER_HEADERS} ${P3RECORDER_SOURCES})
+set_target_properties(p3recorder PROPERTIES DEFINE_SYMBOL BUILDING_PANDA_RECORDER)
 target_link_libraries(p3recorder p3dgraph p3downloader)
 target_interrogate(p3recorder ALL)
 
diff --git a/panda/src/text/CMakeLists.txt b/panda/src/text/CMakeLists.txt
index f6a6a9c3a3..0f3ded3729 100644
--- a/panda/src/text/CMakeLists.txt
+++ b/panda/src/text/CMakeLists.txt
@@ -34,6 +34,7 @@ set(P3TEXT_SOURCES
 
 composite_sources(p3text P3TEXT_SOURCES)
 add_library(p3text ${P3TEXT_HEADERS} ${P3TEXT_SOURCES})
+set_target_properties(p3text PROPERTIES DEFINE_SYMBOL BUILDING_PANDA_TEXT)
 target_link_libraries(p3text p3parametrics)
 if(HAVE_FREETYPE)
   target_link_libraries(p3text p3pnmtext)
diff --git a/panda/src/tform/CMakeLists.txt b/panda/src/tform/CMakeLists.txt
index d45f162f0e..bb20b821ed 100644
--- a/panda/src/tform/CMakeLists.txt
+++ b/panda/src/tform/CMakeLists.txt
@@ -28,6 +28,7 @@ set(P3TFORM_SOURCES
 
 composite_sources(p3tform P3TFORM_SOURCES)
 add_library(p3tform ${P3TFORM_HEADERS} ${P3TFORM_SOURCES})
+set_target_properties(p3tform PROPERTIES DEFINE_SYMBOL BUILDING_PANDA_TFORM)
 target_link_libraries(p3tform p3device p3grutil)
 target_interrogate(p3tform ALL)
 
diff --git a/panda/src/wgldisplay/CMakeLists.txt b/panda/src/wgldisplay/CMakeLists.txt
index f6e83b06af..0370beadab 100644
--- a/panda/src/wgldisplay/CMakeLists.txt
+++ b/panda/src/wgldisplay/CMakeLists.txt
@@ -17,5 +17,6 @@ if(HAVE_WGL)
 
   composite_sources(p3wgldisplay P3WGLDISPLAY_SOURCES)
   add_library(p3wgldisplay ${P3WGLDISPLAY_HEADERS} ${P3WGLDISPLAY_SOURCES})
+  set_target_properties(p3wgldisplay PROPERTIES DEFINE_SYMBOL BUILDING_PANDAGL)
   target_link_libraries(p3wgldisplay p3display p3putil p3windisplay p3glgsg)
 endif()
diff --git a/panda/src/windisplay/CMakeLists.txt b/panda/src/windisplay/CMakeLists.txt
index bd123d3ed7..92c5748301 100644
--- a/panda/src/windisplay/CMakeLists.txt
+++ b/panda/src/windisplay/CMakeLists.txt
@@ -12,6 +12,7 @@ if(WIN32)
 
   composite_sources(p3windisplay P3WINDISPLAY_SOURCES)
   add_library(p3windisplay ${P3WINDISPLAY_HEADERS} ${P3WINDISPLAY_SOURCES})
+  set_target_properties(p3windisplay PROPERTIES DEFINE_SYMBOL BUILDING_PANDAWIN)
   target_link_libraries(p3windisplay p3display p3putil
     Imm32.lib)
 endif()
diff --git a/panda/src/x11display/CMakeLists.txt b/panda/src/x11display/CMakeLists.txt
index 8c66448497..3053e81677 100644
--- a/panda/src/x11display/CMakeLists.txt
+++ b/panda/src/x11display/CMakeLists.txt
@@ -10,6 +10,7 @@ if(HAVE_X11)
 
   composite_sources(p3x11display P3X11DISPLAY_SOURCES)
   add_library(p3x11display ${P3X11DISPLAY_HEADERS} ${P3X11DISPLAY_SOURCES})
+  set_target_properties(p3x11display PROPERTIES DEFINE_SYMBOL BUILDING_PANDAX11)
   target_link_libraries(p3x11display p3display ${X11_LIBRARIES})
 
   install(TARGETS p3x11display DESTINATION lib)