From 9dd37e9dbc361055b64003509275d97784120e84 Mon Sep 17 00:00:00 2001
From: Sam Edwards <CFSworks@gmail.com>
Date: Fri, 16 Mar 2018 19:51:56 -0600
Subject: [PATCH] general: Add guards to ensure proper BUILDING_ macros defined

This is designed to sanity-check the buildsystem, ensuring that the
expected BUILDING_ macros are defined at the expected time. It
also helps catch cases where the wrong BUILDING_/EXPCL_ macros
are used.
---
 direct/src/deadrec/config_deadrec.cxx              | 4 ++++
 direct/src/directd/directd.cxx                     | 4 ++++
 direct/src/distributed/config_distributed.cxx      | 4 ++++
 direct/src/interval/config_interval.cxx            | 4 ++++
 direct/src/motiontrail/config_motiontrail.cxx      | 4 ++++
 direct/src/showbase/showBase.cxx                   | 4 ++++
 dtool/src/dconfig/config_dconfig.cxx               | 4 ++++
 dtool/src/dtoolbase/dtoolbase.cxx                  | 4 ++++
 dtool/src/dtoolutil/config_dtoolutil.cxx           | 4 ++++
 dtool/src/prc/config_prc.cxx                       | 4 ++++
 panda/metalibs/panda/panda.cxx                     | 4 ++++
 panda/src/audio/config_audio.cxx                   | 4 ++++
 panda/src/audiotraits/config_fmodAudio.cxx         | 4 ++++
 panda/src/audiotraits/config_milesAudio.cxx        | 4 ++++
 panda/src/audiotraits/config_openalAudio.cxx       | 4 ++++
 panda/src/awesomium/config_awesomium.cxx           | 4 ++++
 panda/src/bullet/config_bullet.cxx                 | 4 ++++
 panda/src/chan/config_chan.cxx                     | 4 ++++
 panda/src/char/config_char.cxx                     | 4 ++++
 panda/src/cocoadisplay/config_cocoadisplay.mm      | 4 ++++
 panda/src/collada/config_collada.cxx               | 4 ++++
 panda/src/collide/config_collide.cxx               | 4 ++++
 panda/src/cull/config_cull.cxx                     | 4 ++++
 panda/src/device/config_device.cxx                 | 4 ++++
 panda/src/dgraph/config_dgraph.cxx                 | 4 ++++
 panda/src/display/config_display.cxx               | 4 ++++
 panda/src/distort/config_distort.cxx               | 4 ++++
 panda/src/downloader/config_downloader.cxx         | 4 ++++
 panda/src/dxgsg9/config_dxgsg9.cxx                 | 4 ++++
 panda/src/dxml/config_dxml.cxx                     | 4 ++++
 panda/src/egg/config_egg.cxx                       | 4 ++++
 panda/src/egg2pg/config_egg2pg.cxx                 | 4 ++++
 panda/src/egldisplay/config_egldisplay.cxx         | 4 ++++
 panda/src/event/config_event.cxx                   | 4 ++++
 panda/src/express/config_express.cxx               | 4 ++++
 panda/src/ffmpeg/config_ffmpeg.cxx                 | 4 ++++
 panda/src/framework/config_framework.cxx           | 4 ++++
 panda/src/gles2gsg/config_gles2gsg.cxx             | 4 ++++
 panda/src/glesgsg/config_glesgsg.cxx               | 4 ++++
 panda/src/glgsg/config_glgsg.cxx                   | 4 ++++
 panda/src/glxdisplay/config_glxdisplay.cxx         | 4 ++++
 panda/src/gobj/config_gobj.cxx                     | 4 ++++
 panda/src/grutil/config_grutil.cxx                 | 4 ++++
 panda/src/gsgbase/config_gsgbase.cxx               | 4 ++++
 panda/src/linmath/config_linmath.cxx               | 4 ++++
 panda/src/mathutil/config_mathutil.cxx             | 4 ++++
 panda/src/movies/config_movies.cxx                 | 4 ++++
 panda/src/nativenet/config_nativenet.cxx           | 4 ++++
 panda/src/net/config_net.cxx                       | 4 ++++
 panda/src/ode/config_ode.cxx                       | 4 ++++
 panda/src/osxdisplay/config_osxdisplay.cxx         | 4 ++++
 panda/src/parametrics/config_parametrics.cxx       | 4 ++++
 panda/src/particlesystem/config_particlesystem.cxx | 4 ++++
 panda/src/pgraph/config_pgraph.cxx                 | 4 ++++
 panda/src/pgraphnodes/config_pgraphnodes.cxx       | 4 ++++
 panda/src/pgui/config_pgui.cxx                     | 4 ++++
 panda/src/physics/config_physics.cxx               | 4 ++++
 panda/src/physx/config_physx.cxx                   | 4 ++++
 panda/src/pipeline/config_pipeline.cxx             | 4 ++++
 panda/src/pnmimage/config_pnmimage.cxx             | 4 ++++
 panda/src/pnmimagetypes/config_pnmimagetypes.cxx   | 4 ++++
 panda/src/pnmtext/config_pnmtext.cxx               | 4 ++++
 panda/src/pstatclient/config_pstats.cxx            | 4 ++++
 panda/src/putil/config_util.cxx                    | 4 ++++
 panda/src/recorder/config_recorder.cxx             | 4 ++++
 panda/src/rocket/config_rocket.cxx                 | 4 ++++
 panda/src/skel/config_skel.cxx                     | 4 ++++
 panda/src/speedtree/config_speedtree.cxx           | 4 ++++
 panda/src/text/config_text.cxx                     | 4 ++++
 panda/src/tform/config_tform.cxx                   | 4 ++++
 panda/src/tinydisplay/config_tinydisplay.cxx       | 4 ++++
 panda/src/vision/config_vision.cxx                 | 4 ++++
 panda/src/vrpn/config_vrpn.cxx                     | 4 ++++
 panda/src/wgldisplay/config_wgldisplay.cxx         | 4 ++++
 panda/src/windisplay/config_windisplay.cxx         | 4 ++++
 panda/src/x11display/config_x11display.cxx         | 4 ++++
 76 files changed, 304 insertions(+)

diff --git a/direct/src/deadrec/config_deadrec.cxx b/direct/src/deadrec/config_deadrec.cxx
index 72c8c15a14..eb1c43a9c6 100644
--- a/direct/src/deadrec/config_deadrec.cxx
+++ b/direct/src/deadrec/config_deadrec.cxx
@@ -15,6 +15,10 @@
 
 #include "dconfig.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_DIRECT_DEADREC)
+  #error Buildsystem error: BUILDING_DIRECT_DEADREC not defined
+#endif
+
 Configure(config_deadrec);
 NotifyCategoryDef(deadrec, "");
 
diff --git a/direct/src/directd/directd.cxx b/direct/src/directd/directd.cxx
index 111a4fd847..1b4601fc41 100644
--- a/direct/src/directd/directd.cxx
+++ b/direct/src/directd/directd.cxx
@@ -30,6 +30,10 @@
 
 #include "pset.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_DIRECT_DIRECTD)
+  #error Buildsystem error: BUILDING_DIRECT_DIRECTD not defined
+#endif
+
 namespace {
   // ...This section is part of the old stuff from the original
   // implementation.  The new stuff that uses job objects doesn't need this
diff --git a/direct/src/distributed/config_distributed.cxx b/direct/src/distributed/config_distributed.cxx
index 9420bd05df..312964568f 100644
--- a/direct/src/distributed/config_distributed.cxx
+++ b/direct/src/distributed/config_distributed.cxx
@@ -14,6 +14,10 @@
 #include "config_distributed.h"
 #include "dconfig.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_DIRECT_DISTRIBUTED)
+  #error Buildsystem error: BUILDING_DIRECT_DISTRIBUTED not defined
+#endif
+
 Configure(config_distributed);
 NotifyCategoryDef(distributed, "");
 
diff --git a/direct/src/interval/config_interval.cxx b/direct/src/interval/config_interval.cxx
index d88711c8b9..f56ce67e17 100644
--- a/direct/src/interval/config_interval.cxx
+++ b/direct/src/interval/config_interval.cxx
@@ -29,6 +29,10 @@
 
 #include "dconfig.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_DIRECT_INTERVAL)
+  #error Buildsystem error: BUILDING_DIRECT_INTERVAL not defined
+#endif
+
 Configure(config_interval);
 NotifyCategoryDef(interval, "");
 
diff --git a/direct/src/motiontrail/config_motiontrail.cxx b/direct/src/motiontrail/config_motiontrail.cxx
index 0907457acd..997a1a3059 100644
--- a/direct/src/motiontrail/config_motiontrail.cxx
+++ b/direct/src/motiontrail/config_motiontrail.cxx
@@ -14,6 +14,10 @@
 #include "config_motiontrail.h"
 #include "dconfig.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_DIRECT_MOTIONTRAIL)
+  #error Buildsystem error: BUILDING_DIRECT_MOTIONTRAIL not defined
+#endif
+
 extern EXPCL_DIRECT_MOTIONTRAIL void init_libmotiontrail();
 
 Configure(config_motiontrail);
diff --git a/direct/src/showbase/showBase.cxx b/direct/src/showbase/showBase.cxx
index fabc7a9497..12aa08d4bd 100644
--- a/direct/src/showbase/showBase.cxx
+++ b/direct/src/showbase/showBase.cxx
@@ -34,6 +34,10 @@ TOGGLEKEYS g_StartupToggleKeys = {sizeof(TOGGLEKEYS), 0};
 FILTERKEYS g_StartupFilterKeys = {sizeof(FILTERKEYS), 0};
 #endif
 
+#if !defined(CPPPARSER) && !defined(BUILDING_DIRECT_SHOWBASE)
+  #error Buildsystem error: BUILDING_DIRECT_SHOWBASE not defined
+#endif
+
 ConfigureDef(config_showbase);
 ConfigureFn(config_showbase) {
 }
diff --git a/dtool/src/dconfig/config_dconfig.cxx b/dtool/src/dconfig/config_dconfig.cxx
index 49708e719a..d0800084ca 100644
--- a/dtool/src/dconfig/config_dconfig.cxx
+++ b/dtool/src/dconfig/config_dconfig.cxx
@@ -13,5 +13,9 @@
 
 #include "config_dconfig.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_DTOOL_DCONFIG)
+  #error Buildsystem error: BUILDING_DTOOL_DCONFIG not defined
+#endif
+
 NotifyCategoryDef(dconfig, "");
 NotifyCategoryDef(microconfig, "dconfig");
diff --git a/dtool/src/dtoolbase/dtoolbase.cxx b/dtool/src/dtoolbase/dtoolbase.cxx
index 75f25ad253..64b7425057 100644
--- a/dtool/src/dtoolbase/dtoolbase.cxx
+++ b/dtool/src/dtoolbase/dtoolbase.cxx
@@ -14,6 +14,10 @@
 #include "dtoolbase.h"
 #include "memoryHook.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_DTOOL_DTOOLBASE)
+  #error Buildsystem error: BUILDING_DTOOL_DTOOLBASE not defined
+#endif
+
 #if defined(USE_TAU) && defined(WIN32)
 // Hack around tau's lack of DLL export declarations for Profiler class.
 bool __tau_shutdown = false;
diff --git a/dtool/src/dtoolutil/config_dtoolutil.cxx b/dtool/src/dtoolutil/config_dtoolutil.cxx
index eb45fa2f3e..98b3c42760 100644
--- a/dtool/src/dtoolutil/config_dtoolutil.cxx
+++ b/dtool/src/dtoolutil/config_dtoolutil.cxx
@@ -16,6 +16,10 @@
 #include "filename.h"
 #include "pandaSystem.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_DTOOL_DTOOLUTIL)
+  #error Buildsystem error: BUILDING_DTOOL_DCTOOLUTIL not defined
+#endif
+
 /**
  * Initializes the library.  This must be called at least once before any of
  * the functions or classes in this library can be used.  Normally it will be
diff --git a/dtool/src/prc/config_prc.cxx b/dtool/src/prc/config_prc.cxx
index f2a57d1993..2728e642bd 100644
--- a/dtool/src/prc/config_prc.cxx
+++ b/dtool/src/prc/config_prc.cxx
@@ -16,6 +16,10 @@
 #include "configVariableEnum.h"
 #include "pandaFileStreamBuf.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_DTOOL_PRC)
+  #error Buildsystem error: BUILDING_DTOOL_PRC not defined
+#endif
+
 NotifyCategoryDef(prc, "");
 
 ALIGN_16BYTE ConfigVariableBool assert_abort
diff --git a/panda/metalibs/panda/panda.cxx b/panda/metalibs/panda/panda.cxx
index 67620867e3..d3a3b0c24a 100644
--- a/panda/metalibs/panda/panda.cxx
+++ b/panda/metalibs/panda/panda.cxx
@@ -20,6 +20,10 @@
 
 #include "checkPandaVersion.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_LIBPANDA)
+  #error Buildsystem error: BUILDING_LIBPANDA not defined
+#endif
+
 /**
  * Initializes the library.  This must be called at least once before any of
  * the functions or classes in this library can be used.  Normally it will be
diff --git a/panda/src/audio/config_audio.cxx b/panda/src/audio/config_audio.cxx
index e59b3c73ef..0f58e56a32 100644
--- a/panda/src/audio/config_audio.cxx
+++ b/panda/src/audio/config_audio.cxx
@@ -21,6 +21,10 @@
 #include "nullAudioSound.h"
 #include "string_utils.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_PANDA_AUDIO)
+  #error Buildsystem error: BUILDING_PANDA_AUDIO not defined
+#endif
+
 Configure(config_audio);
 NotifyCategoryDef(audio, "");
 
diff --git a/panda/src/audiotraits/config_fmodAudio.cxx b/panda/src/audiotraits/config_fmodAudio.cxx
index affc593636..f0a188fbc5 100644
--- a/panda/src/audiotraits/config_fmodAudio.cxx
+++ b/panda/src/audiotraits/config_fmodAudio.cxx
@@ -19,6 +19,10 @@
 #include "pandaSystem.h"
 #include "dconfig.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_FMOD_AUDIO)
+  #error Buildsystem error: BUILDING_FMOD_AUDIO not defined
+#endif
+
 ConfigureDef(config_fmodAudio);
 NotifyCategoryDef(fmodAudio, ":audio");
 
diff --git a/panda/src/audiotraits/config_milesAudio.cxx b/panda/src/audiotraits/config_milesAudio.cxx
index 6f3f29dddb..6877b3700e 100644
--- a/panda/src/audiotraits/config_milesAudio.cxx
+++ b/panda/src/audiotraits/config_milesAudio.cxx
@@ -22,6 +22,10 @@
 #include "pandaSystem.h"
 #include "dconfig.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_MILES_AUDIO)
+  #error Buildsystem error: BUILDING_MILES_AUDIO not defined
+#endif
+
 ConfigureDef(config_milesAudio);
 NotifyCategoryDef(milesAudio, ":audio");
 
diff --git a/panda/src/audiotraits/config_openalAudio.cxx b/panda/src/audiotraits/config_openalAudio.cxx
index a3340477c2..ad51368d75 100644
--- a/panda/src/audiotraits/config_openalAudio.cxx
+++ b/panda/src/audiotraits/config_openalAudio.cxx
@@ -18,6 +18,10 @@
 #include "pandaSystem.h"
 #include "dconfig.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_OPENAL_AUDIO)
+  #error Buildsystem error: BUILDING_OPENAL_AUDIO not defined
+#endif
+
 ConfigureDef(config_openalAudio);
 NotifyCategoryDef(openalAudio, ":audio");
 
diff --git a/panda/src/awesomium/config_awesomium.cxx b/panda/src/awesomium/config_awesomium.cxx
index 4462dce983..95ce655fe7 100644
--- a/panda/src/awesomium/config_awesomium.cxx
+++ b/panda/src/awesomium/config_awesomium.cxx
@@ -18,6 +18,10 @@
 #include "dconfig.h"
 
 
+#if !defined(CPPPARSER) && !defined(BUILDING_PANDAAWESOMIUM)
+  #error Buildsystem error: BUILDING_PANDAAWESOMIUM not defined
+#endif
+
 Configure(config_awesomium);
 NotifyCategoryDef(awesomium, "");
 
diff --git a/panda/src/bullet/config_bullet.cxx b/panda/src/bullet/config_bullet.cxx
index 9878a9f038..4e228427b9 100644
--- a/panda/src/bullet/config_bullet.cxx
+++ b/panda/src/bullet/config_bullet.cxx
@@ -56,6 +56,10 @@ extern ContactDestroyedCallback gContactDestroyedCallback;
 #include "dconfig.h"
 #include "pandaSystem.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_PANDABULLET)
+  #error Buildsystem error: BUILDING_PANDABULLET not defined
+#endif
+
 Configure(config_bullet);
 NotifyCategoryDef(bullet, "");
 
diff --git a/panda/src/chan/config_chan.cxx b/panda/src/chan/config_chan.cxx
index 9772f2d661..8992cfbbf9 100644
--- a/panda/src/chan/config_chan.cxx
+++ b/panda/src/chan/config_chan.cxx
@@ -34,6 +34,10 @@
 #include "luse.h"
 #include "dconfig.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_PANDA_CHAN)
+  #error Buildsystem error: BUILDING_PANDA_CHAN not defined
+#endif
+
 Configure(config_chan);
 NotifyCategoryDef(chan, "");
 
diff --git a/panda/src/char/config_char.cxx b/panda/src/char/config_char.cxx
index f3a8cc6836..5d536bfc4c 100644
--- a/panda/src/char/config_char.cxx
+++ b/panda/src/char/config_char.cxx
@@ -21,6 +21,10 @@
 #include "jointVertexTransform.h"
 #include "dconfig.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_PANDA_CHAR)
+  #error Buildsystem error: BUILDING_PANDA_CHAR not defined
+#endif
+
 Configure(config_char);
 NotifyCategoryDef(char, "");
 
diff --git a/panda/src/cocoadisplay/config_cocoadisplay.mm b/panda/src/cocoadisplay/config_cocoadisplay.mm
index 42f2f98a8f..c88177cf66 100644
--- a/panda/src/cocoadisplay/config_cocoadisplay.mm
+++ b/panda/src/cocoadisplay/config_cocoadisplay.mm
@@ -20,6 +20,10 @@
 #include "dconfig.h"
 #include "pandaSystem.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_PANDAGL)
+  #error Buildsystem error: BUILDING_PANDAGL not defined
+#endif
+
 Configure(config_cocoadisplay);
 NotifyCategoryDef(cocoadisplay, "display");
 
diff --git a/panda/src/collada/config_collada.cxx b/panda/src/collada/config_collada.cxx
index 81404110f2..fa97023656 100644
--- a/panda/src/collada/config_collada.cxx
+++ b/panda/src/collada/config_collada.cxx
@@ -17,6 +17,10 @@
 #include "loaderFileTypeDae.h"
 #include "loaderFileTypeRegistry.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_COLLADA)
+  #error Buildsystem error: BUILDING_COLLADA not defined
+#endif
+
 ConfigureDef(config_collada);
 NotifyCategoryDef(collada, "");
 
diff --git a/panda/src/collide/config_collide.cxx b/panda/src/collide/config_collide.cxx
index e1999cd147..01d517df04 100644
--- a/panda/src/collide/config_collide.cxx
+++ b/panda/src/collide/config_collide.cxx
@@ -42,6 +42,10 @@
 #include "collisionVisualizer.h"
 #include "dconfig.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_PANDA_COLLIDE)
+  #error Buildsystem error: BUILDING_PANDA_COLLIDE not defined
+#endif
+
 Configure(config_collide);
 NotifyCategoryDef(collide, "");
 
diff --git a/panda/src/cull/config_cull.cxx b/panda/src/cull/config_cull.cxx
index a3b4b4881a..452c69ea0c 100644
--- a/panda/src/cull/config_cull.cxx
+++ b/panda/src/cull/config_cull.cxx
@@ -22,6 +22,10 @@
 #include "cullBinManager.h"
 #include "dconfig.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_PANDA_CULL)
+  #error Buildsystem error: BUILDING_PANDA_CULL not defined
+#endif
+
 ConfigureDef(config_cull);
 NotifyCategoryDef(cull, "");
 
diff --git a/panda/src/device/config_device.cxx b/panda/src/device/config_device.cxx
index 51f1159f33..eb8d1a2f10 100644
--- a/panda/src/device/config_device.cxx
+++ b/panda/src/device/config_device.cxx
@@ -27,6 +27,10 @@
 
 #include "dconfig.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_PANDA_DEVICE)
+  #error Buildsystem error: BUILDING_PANDA_DEVICE not defined
+#endif
+
 Configure(config_device);
 NotifyCategoryDef(device, "");
 
diff --git a/panda/src/dgraph/config_dgraph.cxx b/panda/src/dgraph/config_dgraph.cxx
index fbaec8b78d..3c91aeea18 100644
--- a/panda/src/dgraph/config_dgraph.cxx
+++ b/panda/src/dgraph/config_dgraph.cxx
@@ -17,6 +17,10 @@
 
 #include "dconfig.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_PANDA_DGRAPH)
+  #error Buildsystem error: BUILDING_PANDA_DGRAPH not defined
+#endif
+
 Configure(config_dgraph);
 NotifyCategoryDef(dgraph, "");
 
diff --git a/panda/src/display/config_display.cxx b/panda/src/display/config_display.cxx
index 391a7e8676..0d3fea3937 100644
--- a/panda/src/display/config_display.cxx
+++ b/panda/src/display/config_display.cxx
@@ -31,6 +31,10 @@
 #include "subprocessWindow.h"
 #include "windowHandle.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_PANDA_DISPLAY)
+  #error Buildsystem error: BUILDING_PANDA_DISPLAY not defined
+#endif
+
 ConfigureDef(config_display);
 NotifyCategoryDef(display, "");
 NotifyCategoryDef(gsg, display_cat);
diff --git a/panda/src/distort/config_distort.cxx b/panda/src/distort/config_distort.cxx
index 7dc7055c3c..eaa0147dae 100644
--- a/panda/src/distort/config_distort.cxx
+++ b/panda/src/distort/config_distort.cxx
@@ -20,6 +20,10 @@
 
 #include "dconfig.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_PANDAFX)
+  #error Buildsystem error: BUILDING_PANDAFX not defined
+#endif
+
 Configure(config_distort);
 NotifyCategoryDef(distort, "");
 
diff --git a/panda/src/downloader/config_downloader.cxx b/panda/src/downloader/config_downloader.cxx
index c1db208d01..9c806dba07 100644
--- a/panda/src/downloader/config_downloader.cxx
+++ b/panda/src/downloader/config_downloader.cxx
@@ -19,6 +19,10 @@
 #include "pandaSystem.h"
 
 
+#if !defined(CPPPARSER) && !defined(BUILDING_PANDAEXPRESS)
+  #error Buildsystem error: BUILDING_PANDAEXPRESS not defined
+#endif
+
 ConfigureDef(config_downloader);
 NotifyCategoryDef(downloader, "");
 
diff --git a/panda/src/dxgsg9/config_dxgsg9.cxx b/panda/src/dxgsg9/config_dxgsg9.cxx
index 64831d08c9..d5777602db 100644
--- a/panda/src/dxgsg9/config_dxgsg9.cxx
+++ b/panda/src/dxgsg9/config_dxgsg9.cxx
@@ -27,6 +27,10 @@
 
 #include "dconfig.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_PANDADX)
+  #error Buildsystem error: BUILDING_PANDADX not defined
+#endif
+
 DToolConfigure(config_dxgsg9);
 NotifyCategoryDef(dxgsg9, ":display:gsg");
 NotifyCategoryDef(wdxdisplay9, "display");
diff --git a/panda/src/dxml/config_dxml.cxx b/panda/src/dxml/config_dxml.cxx
index e6691bc676..7e25a58c3a 100644
--- a/panda/src/dxml/config_dxml.cxx
+++ b/panda/src/dxml/config_dxml.cxx
@@ -19,6 +19,10 @@ BEGIN_PUBLISH
 #include "tinyxml.h"
 END_PUBLISH
 
+#if !defined(CPPPARSER) && !defined(BUILDING_PANDA_DXML)
+  #error Buildsystem error: BUILDING_PANDA_DXML not defined
+#endif
+
 Configure(config_dxml);
 NotifyCategoryDef(dxml, "");
 
diff --git a/panda/src/egg/config_egg.cxx b/panda/src/egg/config_egg.cxx
index 83d11dad04..65e08efcbc 100644
--- a/panda/src/egg/config_egg.cxx
+++ b/panda/src/egg/config_egg.cxx
@@ -58,6 +58,10 @@
 
 #include "dconfig.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_PANDAEGG)
+  #error Buildsystem error: BUILDING_PANDAEGG not defined
+#endif
+
 Configure(config_egg);
 NotifyCategoryDef(egg, "");
 
diff --git a/panda/src/egg2pg/config_egg2pg.cxx b/panda/src/egg2pg/config_egg2pg.cxx
index 79c3e40a2b..f864a8f4d8 100644
--- a/panda/src/egg2pg/config_egg2pg.cxx
+++ b/panda/src/egg2pg/config_egg2pg.cxx
@@ -20,6 +20,10 @@
 #include "configVariableCore.h"
 #include "eggRenderState.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_PANDAEGG)
+  #error Buildsystem error: BUILDING_PANDAEGG not defined
+#endif
+
 ConfigureDef(config_egg2pg);
 NotifyCategoryDef(egg2pg, "");
 
diff --git a/panda/src/egldisplay/config_egldisplay.cxx b/panda/src/egldisplay/config_egldisplay.cxx
index 809e73916c..9f9bf13770 100644
--- a/panda/src/egldisplay/config_egldisplay.cxx
+++ b/panda/src/egldisplay/config_egldisplay.cxx
@@ -19,6 +19,10 @@
 #include "dconfig.h"
 #include "pandaSystem.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_PANDAGLES) && !defined(BUILDING_PANDAGLES2)
+  #error Buildsystem error: BUILDING_PANDAGLES(2) not defined
+#endif
+
 Configure(config_egldisplay);
 NotifyCategoryDef(egldisplay, "display");
 
diff --git a/panda/src/event/config_event.cxx b/panda/src/event/config_event.cxx
index 85727d2d7c..c7f1c8eecc 100644
--- a/panda/src/event/config_event.cxx
+++ b/panda/src/event/config_event.cxx
@@ -27,6 +27,10 @@
 
 #include "dconfig.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_PANDA_EVENT)
+  #error Buildsystem error: BUILDING_PANDA_EVENT not defined
+#endif
+
 Configure(config_event);
 NotifyCategoryDef(event, "");
 NotifyCategoryDef(task, "");
diff --git a/panda/src/express/config_express.cxx b/panda/src/express/config_express.cxx
index 042b6d8db1..d86e300436 100644
--- a/panda/src/express/config_express.cxx
+++ b/panda/src/express/config_express.cxx
@@ -36,6 +36,10 @@
 #include "dconfig.h"
 #include "streamWrapper.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_PANDAEXPRESS)
+  #error Buildsystem error: BUILDING_PANDAEXPRESS not defined
+#endif
+
 ConfigureDef(config_express);
 NotifyCategoryDef(express, "");
 NotifyCategoryDef(clock, ":express");
diff --git a/panda/src/ffmpeg/config_ffmpeg.cxx b/panda/src/ffmpeg/config_ffmpeg.cxx
index f0d6a5518e..8cbc9f51ec 100644
--- a/panda/src/ffmpeg/config_ffmpeg.cxx
+++ b/panda/src/ffmpeg/config_ffmpeg.cxx
@@ -24,6 +24,10 @@ extern "C" {
   #include "libavcodec/avcodec.h"
 }
 
+#if !defined(CPPPARSER) && !defined(BUILDING_FFMPEG)
+  #error Buildsystem error: BUILDING_FFMPEG not defined
+#endif
+
 ConfigureDef(config_ffmpeg);
 NotifyCategoryDef(ffmpeg, "");
 
diff --git a/panda/src/framework/config_framework.cxx b/panda/src/framework/config_framework.cxx
index e5c5d42e70..8746d5bff0 100644
--- a/panda/src/framework/config_framework.cxx
+++ b/panda/src/framework/config_framework.cxx
@@ -22,6 +22,10 @@
 
 #include "checkPandaVersion.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_FRAMEWORK)
+  #error Buildsystem error: BUILDING_FRAMEWORK not defined
+#endif
+
 Configure(config_framework);
 NotifyCategoryDef(framework, "");
 
diff --git a/panda/src/gles2gsg/config_gles2gsg.cxx b/panda/src/gles2gsg/config_gles2gsg.cxx
index 3935783653..aee9c925fb 100644
--- a/panda/src/gles2gsg/config_gles2gsg.cxx
+++ b/panda/src/gles2gsg/config_gles2gsg.cxx
@@ -16,6 +16,10 @@
 
 #include "dconfig.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_PANDAGLES2)
+  #error Buildsystem error: BUILDING_PANDAGLES2 not defined
+#endif
+
 ConfigureDef(config_gles2gsg);
 NotifyCategoryDef(gles2gsg, ":display:gsg");
 
diff --git a/panda/src/glesgsg/config_glesgsg.cxx b/panda/src/glesgsg/config_glesgsg.cxx
index a1c0496cfc..b30cf23322 100644
--- a/panda/src/glesgsg/config_glesgsg.cxx
+++ b/panda/src/glesgsg/config_glesgsg.cxx
@@ -16,6 +16,10 @@
 
 #include "dconfig.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_PANDAGLES)
+  #error Buildsystem error: BUILDING_PANDAGLES not defined
+#endif
+
 ConfigureDef(config_glesgsg);
 NotifyCategoryDef(glesgsg, ":display:gsg");
 
diff --git a/panda/src/glgsg/config_glgsg.cxx b/panda/src/glgsg/config_glgsg.cxx
index 8f98e49717..6e60169acc 100644
--- a/panda/src/glgsg/config_glgsg.cxx
+++ b/panda/src/glgsg/config_glgsg.cxx
@@ -16,6 +16,10 @@
 
 #include "dconfig.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_PANDAGL)
+  #error Buildsystem error: BUILDING_PANDAGL not defined
+#endif
+
 ConfigureDef(config_glgsg);
 NotifyCategoryDef(glgsg, ":display:gsg");
 
diff --git a/panda/src/glxdisplay/config_glxdisplay.cxx b/panda/src/glxdisplay/config_glxdisplay.cxx
index b253c0abf9..fffcd2c264 100644
--- a/panda/src/glxdisplay/config_glxdisplay.cxx
+++ b/panda/src/glxdisplay/config_glxdisplay.cxx
@@ -23,6 +23,10 @@
 #include "dconfig.h"
 #include "pandaSystem.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_PANDAGL)
+  #error Buildsystem error: BUILDING_PANDAGL not defined
+#endif
+
 Configure(config_glxdisplay);
 NotifyCategoryDef(glxdisplay, "display");
 
diff --git a/panda/src/gobj/config_gobj.cxx b/panda/src/gobj/config_gobj.cxx
index 058d7463a4..d152f6ebcf 100644
--- a/panda/src/gobj/config_gobj.cxx
+++ b/panda/src/gobj/config_gobj.cxx
@@ -70,6 +70,10 @@
 #include "dconfig.h"
 #include "string_utils.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_PANDA_GOBJ)
+  #error Buildsystem error: BUILDING_PANDA_GOBJ not defined
+#endif
+
 Configure(config_gobj);
 NotifyCategoryDef(gobj, "");
 NotifyCategoryDef(shader, "");
diff --git a/panda/src/grutil/config_grutil.cxx b/panda/src/grutil/config_grutil.cxx
index 94613f4da6..337abd11bb 100644
--- a/panda/src/grutil/config_grutil.cxx
+++ b/panda/src/grutil/config_grutil.cxx
@@ -27,6 +27,10 @@
 
 #include "dconfig.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_PANDA_GRUTIL)
+  #error Buildsystem error: BUILDING_PANDA_GRUTIL not defined
+#endif
+
 Configure(config_grutil);
 NotifyCategoryDef(grutil, "");
 
diff --git a/panda/src/gsgbase/config_gsgbase.cxx b/panda/src/gsgbase/config_gsgbase.cxx
index 2e5ce60aa9..52da83f9c8 100644
--- a/panda/src/gsgbase/config_gsgbase.cxx
+++ b/panda/src/gsgbase/config_gsgbase.cxx
@@ -17,6 +17,10 @@
 
 #include "dconfig.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_PANDA_GSGBASE)
+  #error Buildsystem error: BUILDING_PANDA_GSGBASE not defined
+#endif
+
 Configure(config_gsgbase);
 
 ConfigureFn(config_gsgbase) {
diff --git a/panda/src/linmath/config_linmath.cxx b/panda/src/linmath/config_linmath.cxx
index 93cf571c40..fb0942aa55 100644
--- a/panda/src/linmath/config_linmath.cxx
+++ b/panda/src/linmath/config_linmath.cxx
@@ -17,6 +17,10 @@
 
 #include "dconfig.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_PANDA_LINMATH)
+  #error Buildsystem error: BUILDING_PANDA_LINMATH not defined
+#endif
+
 Configure(config_linmath);
 NotifyCategoryDef(linmath, "");
 
diff --git a/panda/src/mathutil/config_mathutil.cxx b/panda/src/mathutil/config_mathutil.cxx
index 2226b67946..2084b2b670 100644
--- a/panda/src/mathutil/config_mathutil.cxx
+++ b/panda/src/mathutil/config_mathutil.cxx
@@ -26,6 +26,10 @@
 #include "dconfig.h"
 #include "pandaSystem.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_PANDA_MATHUTIL)
+  #error Buildsystem error: BUILDING_PANDA_MATHUTIL not defined
+#endif
+
 Configure(config_mathutil);
 NotifyCategoryDef(mathutil, "");
 
diff --git a/panda/src/movies/config_movies.cxx b/panda/src/movies/config_movies.cxx
index 4884c15f5b..93448cfe8d 100644
--- a/panda/src/movies/config_movies.cxx
+++ b/panda/src/movies/config_movies.cxx
@@ -32,6 +32,10 @@
 #include "wavAudio.h"
 #include "wavAudioCursor.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_PANDA_MOVIES)
+  #error Buildsystem error: BUILDING_PANDA_MOVIES not defined
+#endif
+
 ConfigureDef(config_movies);
 NotifyCategoryDef(movies, "");
 
diff --git a/panda/src/nativenet/config_nativenet.cxx b/panda/src/nativenet/config_nativenet.cxx
index c74a8ca6e2..172e56afa8 100644
--- a/panda/src/nativenet/config_nativenet.cxx
+++ b/panda/src/nativenet/config_nativenet.cxx
@@ -26,6 +26,10 @@
 
 #include "dconfig.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_PANDA_NATIVENET)
+  #error Buildsystem error: BUILDING_PANDA_NATIVENET not defined
+#endif
+
 Configure(config_nativenet);
 NotifyCategoryDef(nativenet, "");
 
diff --git a/panda/src/net/config_net.cxx b/panda/src/net/config_net.cxx
index aafea6fc49..ae717bb580 100644
--- a/panda/src/net/config_net.cxx
+++ b/panda/src/net/config_net.cxx
@@ -18,6 +18,10 @@
 
 #include "dconfig.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_PANDA_NET)
+  #error Buildsystem error: BUILDING_PANDA_NET not defined
+#endif
+
 Configure(config_net);
 NotifyCategoryDef(net, "");
 
diff --git a/panda/src/ode/config_ode.cxx b/panda/src/ode/config_ode.cxx
index 1994fe1254..214281d579 100644
--- a/panda/src/ode/config_ode.cxx
+++ b/panda/src/ode/config_ode.cxx
@@ -47,6 +47,10 @@
 #include "odeCollisionEntry.h"
 #include "dconfig.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_PANDAODE)
+  #error Buildsystem error: BUILDING_PANDAODE not defined
+#endif
+
 Configure(config_ode);
 NotifyCategoryDef(ode, "");
 NotifyCategoryDef(odeworld, "ode");
diff --git a/panda/src/osxdisplay/config_osxdisplay.cxx b/panda/src/osxdisplay/config_osxdisplay.cxx
index 943fe57937..4ac68f5e58 100644
--- a/panda/src/osxdisplay/config_osxdisplay.cxx
+++ b/panda/src/osxdisplay/config_osxdisplay.cxx
@@ -20,6 +20,10 @@
 #include "pandaSystem.h"
 
 
+#if !defined(CPPPARSER) && !defined(BUILDING_PANDAGL)
+  #error Buildsystem error: BUILDING_PANDAGL not defined
+#endif
+
 Configure(config_osxdisplay);
 
 NotifyCategoryDef(osxdisplay, "display");
diff --git a/panda/src/parametrics/config_parametrics.cxx b/panda/src/parametrics/config_parametrics.cxx
index 93a6e3841f..2b07e493bd 100644
--- a/panda/src/parametrics/config_parametrics.cxx
+++ b/panda/src/parametrics/config_parametrics.cxx
@@ -22,6 +22,10 @@
 #include "ropeNode.h"
 #include "sheetNode.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_PANDA_PARAMETRICS)
+  #error Buildsystem error: BUILDING_PANDA_PARAMETRICS not defined
+#endif
+
 Configure(config_parametrics);
 NotifyCategoryDef(parametrics, "");
 
diff --git a/panda/src/particlesystem/config_particlesystem.cxx b/panda/src/particlesystem/config_particlesystem.cxx
index 9c2d9e6a09..0eba6c33f1 100644
--- a/panda/src/particlesystem/config_particlesystem.cxx
+++ b/panda/src/particlesystem/config_particlesystem.cxx
@@ -16,6 +16,10 @@
 #include "geomParticleRenderer.h"
 #include "geomNode.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_PANDAPHYSICS)
+  #error Buildsystem error: BUILDING_PANDAPHYSICS not defined
+#endif
+
 ConfigureDef(config_particlesystem);
 NotifyCategoryDef(particlesystem, "");
 
diff --git a/panda/src/pgraph/config_pgraph.cxx b/panda/src/pgraph/config_pgraph.cxx
index 237c1d0011..54fa621f7b 100644
--- a/panda/src/pgraph/config_pgraph.cxx
+++ b/panda/src/pgraph/config_pgraph.cxx
@@ -92,6 +92,10 @@
 
 #include "dconfig.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_PANDA_PGRAPH)
+  #error Buildsystem error: BUILDING_PANDA_PGRAPH not defined
+#endif
+
 ConfigureDef(config_pgraph);
 NotifyCategoryDef(pgraph, "");
 NotifyCategoryDef(loader, "");
diff --git a/panda/src/pgraphnodes/config_pgraphnodes.cxx b/panda/src/pgraphnodes/config_pgraphnodes.cxx
index f512110858..3879a980b3 100644
--- a/panda/src/pgraphnodes/config_pgraphnodes.cxx
+++ b/panda/src/pgraphnodes/config_pgraphnodes.cxx
@@ -37,6 +37,10 @@
 
 #include "dconfig.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_PANDA_PGRAPHNODES)
+  #error Buildsystem error: BUILDING_PANDA_PGRAPHNODES not defined
+#endif
+
 ConfigureDef(config_pgraphnodes);
 NotifyCategoryDef(pgraphnodes, "");
 
diff --git a/panda/src/pgui/config_pgui.cxx b/panda/src/pgui/config_pgui.cxx
index 7a1682cc96..c2c3e72405 100644
--- a/panda/src/pgui/config_pgui.cxx
+++ b/panda/src/pgui/config_pgui.cxx
@@ -28,6 +28,10 @@
 
 #include "dconfig.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_PANDA_PGUI)
+  #error Buildsystem error: BUILDING_PANDA_PGUI not defined
+#endif
+
 Configure(config_pgui);
 NotifyCategoryDef(pgui, "");
 
diff --git a/panda/src/physics/config_physics.cxx b/panda/src/physics/config_physics.cxx
index c0db4dcdf4..5ce5c905f0 100644
--- a/panda/src/physics/config_physics.cxx
+++ b/panda/src/physics/config_physics.cxx
@@ -26,6 +26,10 @@
 
 #include "dconfig.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_PANDAPHYSICS)
+  #error Buildsystem error: BUILDING_PANDAPHYSICS not defined
+#endif
+
 ConfigureDef(config_physics);
 NotifyCategoryDef(physics, "");
 
diff --git a/panda/src/physx/config_physx.cxx b/panda/src/physx/config_physx.cxx
index e7a4a653e1..4880e37e88 100644
--- a/panda/src/physx/config_physx.cxx
+++ b/panda/src/physx/config_physx.cxx
@@ -67,6 +67,10 @@
 #include "physxWheel.h"
 #include "physxWheelShape.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_PANDAPHYSX)
+  #error Buildsystem error: BUILDING_PANDAPHYSX not defined
+#endif
+
 ConfigureDef(config_physx);
 NotifyCategoryDef(physx, "");
 
diff --git a/panda/src/pipeline/config_pipeline.cxx b/panda/src/pipeline/config_pipeline.cxx
index 6dc24178f0..8f82307c86 100644
--- a/panda/src/pipeline/config_pipeline.cxx
+++ b/panda/src/pipeline/config_pipeline.cxx
@@ -20,6 +20,10 @@
 
 #include "dconfig.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_PANDA_PIPELINE)
+  #error Buildsystem error: BUILDING_PANDA_PIPELINE not defined
+#endif
+
 ConfigureDef(config_pipeline);
 NotifyCategoryDef(pipeline, "");
 NotifyCategoryDef(thread, "");
diff --git a/panda/src/pnmimage/config_pnmimage.cxx b/panda/src/pnmimage/config_pnmimage.cxx
index 1cb8b24bf8..5bb734cf85 100644
--- a/panda/src/pnmimage/config_pnmimage.cxx
+++ b/panda/src/pnmimage/config_pnmimage.cxx
@@ -17,6 +17,10 @@
 
 #include "dconfig.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_PANDA_PNMIMAGE)
+  #error Buildsystem error: BUILDING_PANDA_PNMIMAGE not defined
+#endif
+
 Configure(config_pnmimage);
 NotifyCategoryDef(pnmimage, "");
 
diff --git a/panda/src/pnmimagetypes/config_pnmimagetypes.cxx b/panda/src/pnmimagetypes/config_pnmimagetypes.cxx
index 2fc23d574a..b115aa5213 100644
--- a/panda/src/pnmimagetypes/config_pnmimagetypes.cxx
+++ b/panda/src/pnmimagetypes/config_pnmimagetypes.cxx
@@ -32,6 +32,10 @@
 #include "dconfig.h"
 #include "pandaSystem.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_PANDA_PNMIMAGETYPES)
+  #error Buildsystem error: BUILDING_PANDA_PNMIMAGETYPES not defined
+#endif
+
 Configure(config_pnmimagetypes);
 NotifyCategoryDefName(pnmimage_sgi, "sgi", pnmimage_cat);
 NotifyCategoryDefName(pnmimage_tga, "tga", pnmimage_cat);
diff --git a/panda/src/pnmtext/config_pnmtext.cxx b/panda/src/pnmtext/config_pnmtext.cxx
index b806b8d048..a0a627aca7 100644
--- a/panda/src/pnmtext/config_pnmtext.cxx
+++ b/panda/src/pnmtext/config_pnmtext.cxx
@@ -16,6 +16,10 @@
 #include "dconfig.h"
 #include "freetypeFace.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_PANDA_PNMTEXT)
+  #error Buildsystem error: BUILDING_PANDA_PNMTEXT not defined
+#endif
+
 Configure(config_pnmtext);
 NotifyCategoryDef(pnmtext, "");
 
diff --git a/panda/src/pstatclient/config_pstats.cxx b/panda/src/pstatclient/config_pstats.cxx
index 4a25d9e85c..dcd49a4365 100644
--- a/panda/src/pstatclient/config_pstats.cxx
+++ b/panda/src/pstatclient/config_pstats.cxx
@@ -15,6 +15,10 @@
 
 #include "dconfig.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_PANDA_PSTATCLIENT)
+  #error Buildsystem error: BUILDING_PANDA_PSTATCLIENT not defined
+#endif
+
 ConfigureDef(config_pstats);
 NotifyCategoryDef(pstats, "");
 
diff --git a/panda/src/putil/config_util.cxx b/panda/src/putil/config_util.cxx
index 516c98ce6a..c5956adc2b 100644
--- a/panda/src/putil/config_util.cxx
+++ b/panda/src/putil/config_util.cxx
@@ -47,6 +47,10 @@
 
 #include "dconfig.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_PANDA_PUTIL)
+  #error Buildsystem error: BUILDING_PANDA_PUTIL not defined
+#endif
+
 ConfigureDef(config_util);
 NotifyCategoryDef(util, "");
 NotifyCategoryDef(bam, util_cat);
diff --git a/panda/src/recorder/config_recorder.cxx b/panda/src/recorder/config_recorder.cxx
index 6057362134..97335e17cd 100644
--- a/panda/src/recorder/config_recorder.cxx
+++ b/panda/src/recorder/config_recorder.cxx
@@ -22,6 +22,10 @@
 
 #include "dconfig.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_PANDA_RECORDER)
+  #error Buildsystem error: BUILDING_PANDA_RECORDER not defined
+#endif
+
 ConfigureDef(config_recorder);
 NotifyCategoryDef(recorder, "");
 
diff --git a/panda/src/rocket/config_rocket.cxx b/panda/src/rocket/config_rocket.cxx
index b4a43f8127..4de7bf3e28 100644
--- a/panda/src/rocket/config_rocket.cxx
+++ b/panda/src/rocket/config_rocket.cxx
@@ -26,6 +26,10 @@
 #include <Rocket/Core.h>
 #undef Factory
 
+#if !defined(CPPPARSER) && !defined(BUILDING_ROCKET)
+  #error Buildsystem error: BUILDING_ROCKET not defined
+#endif
+
 Configure(config_rocket);
 NotifyCategoryDef(rocket, "");
 
diff --git a/panda/src/skel/config_skel.cxx b/panda/src/skel/config_skel.cxx
index 2c307d3270..5fa6f6595c 100644
--- a/panda/src/skel/config_skel.cxx
+++ b/panda/src/skel/config_skel.cxx
@@ -16,6 +16,10 @@
 #include "typedSkel.h"
 #include "dconfig.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_PANDASKEL)
+  #error Buildsystem error: BUILDING_PANDASKEL not defined
+#endif
+
 Configure(config_skel);
 NotifyCategoryDef(skel, "");
 
diff --git a/panda/src/speedtree/config_speedtree.cxx b/panda/src/speedtree/config_speedtree.cxx
index fd4eb3cd5a..b386bcb59a 100644
--- a/panda/src/speedtree/config_speedtree.cxx
+++ b/panda/src/speedtree/config_speedtree.cxx
@@ -21,6 +21,10 @@
 #include "loaderFileTypeRegistry.h"
 #include "dconfig.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_PANDASPEEDTREE)
+  #error Buildsystem error: BUILDING_PANDASPEEDTREE not defined
+#endif
+
 ConfigureDef(config_speedtree);
 NotifyCategoryDef(speedtree, "");
 
diff --git a/panda/src/text/config_text.cxx b/panda/src/text/config_text.cxx
index 9475eabf55..2fff80cd0c 100644
--- a/panda/src/text/config_text.cxx
+++ b/panda/src/text/config_text.cxx
@@ -27,6 +27,10 @@
 #include "dconfig.h"
 #include "config_express.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_PANDA_TEXT)
+  #error Buildsystem error: BUILDING_PANDA_TEXT not defined
+#endif
+
 Configure(config_text);
 NotifyCategoryDef(text, "");
 
diff --git a/panda/src/tform/config_tform.cxx b/panda/src/tform/config_tform.cxx
index 1bbb3a7e57..b8a578d07c 100644
--- a/panda/src/tform/config_tform.cxx
+++ b/panda/src/tform/config_tform.cxx
@@ -25,6 +25,10 @@
 
 #include "dconfig.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_PANDA_TFORM)
+  #error Buildsystem error: BUILDING_PANDA_TFORM not defined
+#endif
+
 Configure(config_tform);
 NotifyCategoryDef(tform, "");
 
diff --git a/panda/src/tinydisplay/config_tinydisplay.cxx b/panda/src/tinydisplay/config_tinydisplay.cxx
index 228be9a1ee..31ef112ee5 100644
--- a/panda/src/tinydisplay/config_tinydisplay.cxx
+++ b/panda/src/tinydisplay/config_tinydisplay.cxx
@@ -29,6 +29,10 @@
 #include "dconfig.h"
 #include "pandaSystem.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_TINYDISPLAY)
+  #error Buildsystem error: BUILDING_TINYDISPLAY not defined
+#endif
+
 Configure(config_tinydisplay);
 NotifyCategoryDef(tinydisplay, "display");
 
diff --git a/panda/src/vision/config_vision.cxx b/panda/src/vision/config_vision.cxx
index 50d4b8aeb3..ffe3719962 100644
--- a/panda/src/vision/config_vision.cxx
+++ b/panda/src/vision/config_vision.cxx
@@ -23,6 +23,10 @@
 #include "texturePool.h"
 #include "dconfig.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_VISION)
+  #error Buildsystem error: BUILDING_VISION not defined
+#endif
+
 Configure(config_vision);
 NotifyCategoryDef(vision, "");
 
diff --git a/panda/src/vrpn/config_vrpn.cxx b/panda/src/vrpn/config_vrpn.cxx
index 77d2b198ee..cc577bd328 100644
--- a/panda/src/vrpn/config_vrpn.cxx
+++ b/panda/src/vrpn/config_vrpn.cxx
@@ -21,6 +21,10 @@
 
 #include "dconfig.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_VRPN)
+  #error Buildsystem error: BUILDING_VRPN not defined
+#endif
+
 Configure(config_vrpn);
 NotifyCategoryDef(vrpn, "");
 
diff --git a/panda/src/wgldisplay/config_wgldisplay.cxx b/panda/src/wgldisplay/config_wgldisplay.cxx
index 9cd4a149f3..93dc2ad36c 100644
--- a/panda/src/wgldisplay/config_wgldisplay.cxx
+++ b/panda/src/wgldisplay/config_wgldisplay.cxx
@@ -20,6 +20,10 @@
 #include "dconfig.h"
 #include "pandaSystem.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_PANDAGL)
+  #error Buildsystem error: BUILDING_PANDAGL not defined
+#endif
+
 Configure(config_wgldisplay);
 NotifyCategoryDef(wgldisplay, "display");
 
diff --git a/panda/src/windisplay/config_windisplay.cxx b/panda/src/windisplay/config_windisplay.cxx
index 65447af18d..1af5cf95da 100644
--- a/panda/src/windisplay/config_windisplay.cxx
+++ b/panda/src/windisplay/config_windisplay.cxx
@@ -16,6 +16,10 @@
 #include "winGraphicsWindow.h"
 #include "dconfig.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_PANDAWIN)
+  #error Buildsystem error: BUILDING_PANDAWIN not defined
+#endif
+
 Configure(config_windisplay);
 NotifyCategoryDef(windisplay, "display");
 
diff --git a/panda/src/x11display/config_x11display.cxx b/panda/src/x11display/config_x11display.cxx
index c2b89c42b2..bca59d5a17 100644
--- a/panda/src/x11display/config_x11display.cxx
+++ b/panda/src/x11display/config_x11display.cxx
@@ -18,6 +18,10 @@
 #include "dconfig.h"
 #include "pandaSystem.h"
 
+#if !defined(CPPPARSER) && !defined(BUILDING_PANDAX11)
+  #error Buildsystem error: BUILDING_PANDAX11 not defined
+#endif
+
 Configure(config_x11display);
 NotifyCategoryDef(x11display, "display");