option to disable ITASC IK solver, (will be enabled by default ofcourse)

- option only available to cmake, scons and make have this enabled always.
- without this clang/llvm can compile blender
- this was the second biggest internal lib, 192mb -> 172mb for all blenders libs (with debug flags), so gives some speedup to linking. 

6 files changed, 36 insertions, 11 deletions

diff --git a/source/blender/ikplugin/BIK_api.h b/source/blender/ikplugin/BIK_api.h
index 0f0703486a3..0f4fea89c37 100644
--- a/source/blender/ikplugin/BIK_api.h
+++ b/source/blender/ikplugin/BIK_api.h
@@ -73,7 +73,6 @@ int BIK_get_solver_param(struct bPose *pose, struct bPoseChannel *pchan, int id,
 // number of solver available
 // 0 = iksolver
 // 1 = iTaSC
-#define BIK_SOLVER_COUNT		2
 
 /* for use in BIK_get_constraint_param */
 #define BIK_PARAM_CONSTRAINT_ERROR		0
diff --git a/source/blender/ikplugin/CMakeLists.txt b/source/blender/ikplugin/CMakeLists.txt
index ef1f4d450b9..79f33effb87 100644
--- a/source/blender/ikplugin/CMakeLists.txt
+++ b/source/blender/ikplugin/CMakeLists.txt
@@ -24,12 +24,27 @@
 #
 # ***** END GPL LICENSE BLOCK *****
 
-FILE(GLOB SRC intern/*.c intern/*.cpp)
+
+SET(SRC
+	./intern/ikplugin_api.c
+	./intern/iksolver_plugin.c
+)
 
 SET(INC 
-  ../../../intern/guardedalloc ../../../intern/iksolver/extern
-  ../../../intern/itasc ../../../extern/Eigen2
-  ../blenlib ../makesdna ../blenkernel ../include ../ikplugin
+	../blenlib
+	../makesdna
+	../blenkernel
+	../include
+	../ikplugin
+	../../../intern/guardedalloc
+	../../../intern/iksolver/extern
 )
 
+IF(WITH_IK_ITASC)
+	ADD_DEFINITIONS(-DWITH_IK_ITASC)
+	LIST(APPEND INC ../../../extern/Eigen2)
+	LIST(APPEND INC ../../../intern/itasc)
+	LIST(APPEND SRC ./intern/itasc_plugin.cpp)
+ENDIF(WITH_IK_ITASC)
+
 BLENDERLIB(bf_ikplugin "${SRC}" "${INC}")
diff --git a/source/blender/ikplugin/SConscript b/source/blender/ikplugin/SConscript
index a745a93077a..f60c42f8dc9 100644
--- a/source/blender/ikplugin/SConscript
+++ b/source/blender/ikplugin/SConscript
@@ -1,9 +1,11 @@
 #!/usr/bin/python
 Import ('env')
-
+defs = []
 sources = env.Glob('intern/*.c') + env.Glob('intern/*.cpp')
 
 incs = '#/intern/guardedalloc #/intern/iksolver/extern ../makesdna ../blenlib'
 incs += ' ../blenkernel ../include ../ikplugin #/intern/itasc #/extern/Eigen2'
 
-env.BlenderLib ( 'bf_ikplugin', sources, Split(incs), [], libtype=['core','player'], priority=[180, 190] )
+defs.append('WITH_IK_ITASC')
+
+env.BlenderLib ( 'bf_ikplugin', sources, Split(incs), defs, libtype=['core','player'], priority=[180, 190] )
diff --git a/source/blender/ikplugin/intern/Makefile b/source/blender/ikplugin/intern/Makefile
index 352ab90df9d..12e2366b28e 100644
--- a/source/blender/ikplugin/intern/Makefile
+++ b/source/blender/ikplugin/intern/Makefile
@@ -30,6 +30,9 @@ DIR = $(OCGDIR)/blender/ikplugin
 
 include nan_compile.mk
 
+CFLAGS += -DWITH_IK_ITASC
+CPPFLAGS += -DWITH_IK_ITASC
+
 CFLAGS += $(LEVEL_1_C_WARNINGS)
 CFLAGS += -I$(NAN_GUARDEDALLOC)/include
 CFLAGS += -I../../makesdna
diff --git a/source/blender/ikplugin/intern/ikplugin_api.c b/source/blender/ikplugin/intern/ikplugin_api.c
index cdc4ee11518..c3310e77ad6 100644
--- a/source/blender/ikplugin/intern/ikplugin_api.c
+++ b/source/blender/ikplugin/intern/ikplugin_api.c
@@ -42,10 +42,12 @@
 
 #include "ikplugin_api.h"
 #include "iksolver_plugin.h"
-#include "itasc_plugin.h"
 
+#ifdef WITH_IK_ITASC
+#include "itasc_plugin.h"
+#endif
 
-static IKPlugin ikplugin_tab[BIK_SOLVER_COUNT] = {
+static IKPlugin ikplugin_tab[] = {
 	/* Legacy IK solver */
 	{
 		iksolver_initialize_tree,
@@ -55,6 +57,7 @@ static IKPlugin ikplugin_tab[BIK_SOLVER_COUNT] = {
 		NULL,
 		NULL,
 		NULL,
+#ifdef WITH_IK_ITASC
 	},
 	/* iTaSC IK solver */
 	{
@@ -65,13 +68,13 @@ static IKPlugin ikplugin_tab[BIK_SOLVER_COUNT] = {
 		itasc_clear_cache,
 		itasc_update_param,
 		itasc_test_constraint,
+#endif
 	}
 };
 
-
 static IKPlugin *get_plugin(bPose *pose)
 {
-	if (!pose || pose->iksolver < 0 || pose->iksolver >= BIK_SOLVER_COUNT)
+	if (!pose || pose->iksolver < 0 || pose->iksolver >= (sizeof(ikplugin_tab) / sizeof(IKPlugin)))
 		return NULL;
 
 	return &ikplugin_tab[pose->iksolver];
@@ -135,3 +138,4 @@ void BIK_test_constraint(struct Object *ob, struct bConstraint *cons)
 	if (plugin && plugin->test_constraint)
 		plugin->test_constraint(ob, cons);
 }
+
diff --git a/source/blender/ikplugin/intern/itasc_plugin.cpp b/source/blender/ikplugin/intern/itasc_plugin.cpp
index af69cb9a996..7bdc327afa1 100644
--- a/source/blender/ikplugin/intern/itasc_plugin.cpp
+++ b/source/blender/ikplugin/intern/itasc_plugin.cpp
@@ -32,6 +32,7 @@
 #include <vector>
 
 // iTaSC headers
+#ifdef WITH_IK_ITASC
 #include "Armature.hpp"
 #include "MovingFrame.hpp"
 #include "CopyPose.hpp"
@@ -40,6 +41,7 @@
 #include "Scene.hpp"
 #include "Cache.hpp"
 #include "Distance.hpp"
+#endif
 
 #include "MEM_guardedalloc.h"