Build-system: Force C linkage for all DNA type headers

Some DNA headers already did this, most did not. Even though many of them would
be included in C++ files and thus compiled as C++. This would be confusing and
developers may think they have to add `extern "C"` too a whole lot of
(indirect) includes to be able to use a C header in C++.

However, this is a misconception.
`extern "C"` does not cause code to be compiled with C rather than C++! It only
causes the linker to not use C++ function name mangling. See
https://stackoverflow.com/a/1041880.
Because extern DNA headers don't have function declarations, using `extern "C"`
actually should not have any effect. On the other hand, adding it causes no
harm and avoids confusion. So let's just have it consistently in C header
files.

Differential Revision: https://developer.blender.org/D9578

Reviewed by: Bastien Montagne, Sybren Stüvel

source/blender/makesdna/DNA_armature_types.h

@@ -27,6 +27,10 @@
 #include "DNA_defs.h"
 #include "DNA_listBase.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 struct AnimData;
 
 /* this system works on different transformation space levels;
@@ -280,3 +284,7 @@ typedef enum eBone_BBoneHandleType {
 } eBone_BBoneHandleType;
 
 #define MAXBONENAME 64
+
+#ifdef __cplusplus
+}
+#endif

source/blender/makesdna/DNA_boid_types.h

@@ -25,6 +25,10 @@
 
 #include "DNA_listBase.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 typedef enum eBoidRuleType {
   eBoidRuleType_None = 0,
   /** go to goal assigned object or loudest assigned signal source */
@@ -222,3 +226,7 @@ typedef struct BoidSettings {
 //#define BOID_RULE_LAND            (1 << 3)        /* goal */
 //#define BOID_RULE_WITH_BOIDS      (1 << 4)        /* avoid collision */
 //#define BOID_RULE_WITH_DEFLECTORS (1 << 5)    /* avoid collision */
+
+#ifdef __cplusplus
+}
+#endif

source/blender/makesdna/DNA_brush_types.h

@@ -27,6 +27,10 @@
 #include "DNA_curve_types.h"
 #include "DNA_texture_types.h" /* for MTex */
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 struct CurveMapping;
 struct Image;
 struct MTex;
@@ -980,3 +984,7 @@ enum {
 
 #define MAX_BRUSH_PIXEL_RADIUS 500
 #define GP_MAX_BRUSH_PIXEL_RADIUS 1000
+
+#ifdef __cplusplus
+}
+#endif

source/blender/makesdna/DNA_cloth_types.h

@@ -25,6 +25,10 @@
 
 #include "DNA_defs.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /**
  * This struct contains all the global data required to run a simulation.
  * At the time of this writing, this structure contains data appropriate
@@ -250,3 +254,7 @@ typedef enum {
   CLOTH_COLLSETTINGS_FLAG_ENABLED = (1 << 1), /* enables cloth - object collisions */
   CLOTH_COLLSETTINGS_FLAG_SELF = (1 << 2),    /* enables selfcollisions */
 } CLOTH_COLLISIONSETTINGS_FLAGS;
+
+#ifdef __cplusplus
+}
+#endif

source/blender/makesdna/DNA_collection_types.h

@@ -29,6 +29,10 @@
 #include "DNA_defs.h"
 #include "DNA_listBase.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 struct Collection;
 struct Object;
 
@@ -109,3 +113,7 @@ typedef enum CollectionColorTag {
 
   COLLECTION_COLOR_TOT,
 } CollectionColorTag;
+
+#ifdef __cplusplus
+}
+#endif

source/blender/makesdna/DNA_color_types.h

@@ -26,6 +26,10 @@
 #include "DNA_defs.h"
 #include "DNA_vec_types.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /* general defines for kernel functions */
 #define CM_RESOL 32
 #define CM_TABLE 256
@@ -214,3 +218,7 @@ typedef struct ColorManagedColorspaceSettings {
 enum {
   COLORMANAGE_VIEW_USE_CURVES = (1 << 0),
 };
+
+#ifdef __cplusplus
+}
+#endif

source/blender/makesdna/DNA_constraint_types.h

@@ -28,6 +28,10 @@
 #include "DNA_defs.h"
 #include "DNA_listBase.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 struct Action;
 struct Ipo;
 struct Text;
@@ -1172,3 +1176,7 @@ typedef enum eStretchTo_Flags {
 #define CONSTRAINT_RB_CONETWIST 4
 #define CONSTRAINT_RB_VEHICLE 11
 #define CONSTRAINT_RB_GENERIC6DOF 12
+
+#ifdef __cplusplus
+}
+#endif

source/blender/makesdna/DNA_curve_types.h

@@ -28,6 +28,10 @@
 #include "DNA_listBase.h"
 #include "DNA_vec_types.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #define MAXTEXTBOX 256 /* used in readfile.c and editfont.c */
 
 struct AnimData;
@@ -606,3 +610,7 @@ enum {
 
 /* indicates point has been seen during surface duplication */
 #define SURF_SEEN 4
+
+#ifdef __cplusplus
+}
+#endif

source/blender/makesdna/DNA_curveprofile_types.h

@@ -25,6 +25,10 @@
 
 #include "DNA_vec_types.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /** Number of points in high resolution table is dynamic up to a maximum. */
 #define PROF_TABLE_MAX 512
 /** Number of table points per control point. */
@@ -98,3 +102,7 @@ typedef enum eCurveProfilePresets {
   PROF_PRESET_CROWN = 3,    /* Second molding example. */
   PROF_PRESET_STEPS = 4,    /* Dynamic number of steps defined by segments_len. */
 } eCurveProfilePresets;
+
+#ifdef __cplusplus
+}
+#endif

source/blender/makesdna/DNA_dynamicpaint_types.h

@@ -21,6 +21,11 @@
 #pragma once
 
 #include "DNA_listBase.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 struct PaintSurfaceData;
 
 /* surface format */
@@ -261,3 +266,7 @@ typedef struct DynamicPaintBrushSettings {
   float wave_factor, wave_clamp;
   float max_velocity, smudge_strength;
 } DynamicPaintBrushSettings;
+
+#ifdef __cplusplus
+}
+#endif

source/blender/makesdna/DNA_effect_types.h

@@ -23,6 +23,10 @@
 
 #pragma once
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /* don't forget, new effects also in writefile.c for dna!!! */
 
 #define PAF_MAXMULT 4
@@ -129,3 +133,7 @@ typedef struct WaveEff {
   float timeoffs, lifetime;
 
 } WaveEff;
+
+#ifdef __cplusplus
+}
+#endif

source/blender/makesdna/DNA_fileglobal_types.h

@@ -23,6 +23,10 @@
 
 #pragma once
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /**
  * FileGlobal stores a part of the current user-interface settings at
  * the moment of saving, and the file-specific settings.
@@ -53,3 +57,7 @@ typedef struct FileGlobal {
 /* example: if in 2.43 the meshes lose mesh data, minversion is 2.43 then too */
 /* or: in 2.42, subversion 1, same as above, minversion then is 2.42, min subversion 1 */
 /* (defines for version are in the BKE_blender_version.h file, for historic reasons) */
+
+#ifdef __cplusplus
+}
+#endif

source/blender/makesdna/DNA_fluid_types.h

@@ -25,6 +25,10 @@
 
 #include "DNA_listBase.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /**
  * #FluidDomainSettings.flags
  * Domain flags.
@@ -860,3 +864,7 @@ typedef struct FluidEffectorSettings {
   short guide_mode;
   char _pad2[2];
 } FluidEffectorSettings;
+
+#ifdef __cplusplus
+}
+#endif

source/blender/makesdna/DNA_gpencil_modifier_types.h

@@ -23,6 +23,10 @@
 #include "DNA_defs.h"
 #include "DNA_listBase.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 struct LatticeDeformData;
 
 /* WARNING ALERT! TYPEDEF VALUES ARE WRITTEN IN FILES! SO DO NOT CHANGE!
@@ -801,3 +805,7 @@ typedef enum eTextureGpencil_Mode {
   FILL = 1,
   STROKE_AND_FILL = 2,
 } eTextureGpencil_Mode;
+
+#ifdef __cplusplus
+}
+#endif

source/blender/makesdna/DNA_gpencil_types.h

@@ -27,6 +27,10 @@
 #include "DNA_brush_types.h"
 #include "DNA_listBase.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 struct AnimData;
 struct MDeformVert;
 struct Curve;
@@ -835,3 +839,7 @@ typedef enum eGP_DrawMode {
 #define GPENCIL_ANY_VERTEX_MASK(flag) \
   ((flag & (GP_VERTEX_MASK_SELECTMODE_POINT | GP_VERTEX_MASK_SELECTMODE_STROKE | \
             GP_VERTEX_MASK_SELECTMODE_SEGMENT)))
+
+#ifdef __cplusplus
+}
+#endif

source/blender/makesdna/DNA_gpu_types.h

@@ -23,6 +23,10 @@
 
 #pragma once
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /* Keep for 'Camera' versioning. */
 /** Properties for dof effect. */
 typedef struct GPUDOFSettings {
@@ -36,3 +40,7 @@ typedef struct GPUDOFSettings {
   int num_blades;
   int high_quality;
 } GPUDOFSettings;
+
+#ifdef __cplusplus
+}
+#endif

source/blender/makesdna/DNA_hair_types.h

@@ -23,6 +23,10 @@
 #include "DNA_ID.h"
 #include "DNA_customdata_types.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 typedef struct HairCurve {
   /* Index of first point of hair curve. */
   int firstpoint;
@@ -75,3 +79,7 @@ enum {
 
 /* Only one material supported currently. */
 #define HAIR_MATERIAL_NR 1
+
+#ifdef __cplusplus
+}
+#endif

source/blender/makesdna/DNA_image_types.h

@@ -27,6 +27,10 @@
 #include "DNA_color_types.h" /* for color management */
 #include "DNA_defs.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 struct GPUTexture;
 struct MovieCache;
 struct PackedFile;
@@ -267,3 +271,7 @@ enum {
   IMA_ALPHA_CHANNEL_PACKED = 2,
   IMA_ALPHA_IGNORE = 3,
 };
+
+#ifdef __cplusplus
+}
+#endif

source/blender/makesdna/DNA_ipo_types.h

@@ -36,6 +36,10 @@
 
 #include "BLI_compiler_attrs.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /* -------------------------- Type Defines --------------------------- */
 
 /* --- IPO Curve Driver --- */
@@ -516,3 +520,7 @@ typedef struct Ipo {
 /* driver->flag */
 /* invalid flag: currently only used for buggy pydriver expressions */
 #define IPO_DRIVER_FLAG_INVALID (1 << 0)
+
+#ifdef __cplusplus
+}
+#endif

source/blender/makesdna/DNA_key_types.h

@@ -30,6 +30,10 @@
 #include "DNA_defs.h"
 #include "DNA_listBase.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 struct AnimData;
 struct Ipo;
 
@@ -158,3 +162,7 @@ enum {
 
 #define KEYELEM_ELEM_LEN_BEZTRIPLE 4
 #define KEYELEM_FLOAT_LEN_BEZTRIPLE (KEYELEM_ELEM_LEN_BEZTRIPLE * KEYELEM_ELEM_SIZE_CURVE)
+
+#ifdef __cplusplus
+}
+#endif

source/blender/makesdna/DNA_lattice_types.h

@@ -26,6 +26,10 @@
 #include "DNA_ID.h"
 #include "DNA_defs.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 struct AnimData;
 struct BPoint;
 struct Ipo;
@@ -82,3 +86,7 @@ typedef struct Lattice {
 #define LT_DS_EXPAND 4
 
 #define LT_ACTBP_NONE -1
+
+#ifdef __cplusplus
+}
+#endif

source/blender/makesdna/DNA_light_types.h

@@ -26,6 +26,10 @@
 #include "DNA_ID.h"
 #include "DNA_defs.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #ifndef MAX_MTEX
 #  define MAX_MTEX 18
 #endif
@@ -154,3 +158,7 @@ typedef struct Light {
 /* #define LA_AREA_BOX  3 */ /* UNUSED */
 #define LA_AREA_DISK 4
 #define LA_AREA_ELLIPSE 5
+
+#ifdef __cplusplus
+}
+#endif

source/blender/makesdna/DNA_linestyle_types.h

@@ -26,6 +26,10 @@
 #include "DNA_ID.h"
 #include "DNA_listBase.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #ifndef MAX_MTEX
 #  define MAX_MTEX 18
 #endif
@@ -575,3 +579,7 @@ typedef struct FreestyleLineStyle {
   ListBase thickness_modifiers;
   ListBase geometry_modifiers;
 } FreestyleLineStyle;
+
+#ifdef __cplusplus
+}
+#endif

source/blender/makesdna/DNA_mask_types.h

@@ -31,6 +31,10 @@
 #include "DNA_defs.h"
 #include "DNA_listBase.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 typedef struct Mask {
   ID id;
   struct AnimData *adt;
@@ -263,3 +267,7 @@ enum {
 enum {
   MASK_ANIMF_EXPAND = (1 << 4),
 };
+
+#ifdef __cplusplus
+}
+#endif

source/blender/makesdna/DNA_material_types.h

@@ -27,6 +27,10 @@
 #include "DNA_defs.h"
 #include "DNA_listBase.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #ifndef MAX_MTEX
 #  define MAX_MTEX 18
 #endif
@@ -359,3 +363,7 @@ enum {
   GP_MATERIAL_FOLLOW_OBJ = 1,
   GP_MATERIAL_FOLLOW_FIXED = 2,
 };
+
+#ifdef __cplusplus
+}
+#endif

source/blender/makesdna/DNA_meshdata_types.h

@@ -26,6 +26,10 @@
 #include "DNA_customdata_types.h"
 #include "DNA_listBase.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /* -------------------------------------------------------------------- */
 /** \name Geometry Elements
  * \{ */
@@ -519,3 +523,7 @@ typedef struct MRecast {
 } MRecast;
 
 /** \} */
+
+#ifdef __cplusplus
+}
+#endif

source/blender/makesdna/DNA_meta_types.h

@@ -27,6 +27,10 @@
 #include "DNA_defs.h"
 #include "DNA_listBase.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 struct AnimData;
 struct BoundBox;
 struct Ipo;
@@ -138,3 +142,7 @@ typedef struct MetaBall {
 #define MB_NEGATIVE 2
 #define MB_HIDE 8
 #define MB_SCALE_RAD 16
+
+#ifdef __cplusplus
+}
+#endif

source/blender/makesdna/DNA_nla_types.h

@@ -25,6 +25,10 @@
 
 #include "DNA_listBase.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 struct Ipo;
 struct Object;
 struct bAction;
@@ -105,3 +109,7 @@ typedef enum eActStrip_Flag {
   ACTSTRIP_REVERSE = (1 << 7),
   ACTSTRIP_AUTO_BLENDS = (1 << 11),
 } eActStrip_Flag;
+
+#ifdef __cplusplus
+}
+#endif

source/blender/makesdna/DNA_node_types.h

@@ -29,6 +29,10 @@
 #include "DNA_texture_types.h"
 #include "DNA_vec_types.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 struct AnimData;
 struct ID;
 struct Image;
@@ -1443,3 +1447,7 @@ typedef enum NodeSimInputTimeType {
   NODE_SIM_INPUT_SIMULATION_TIME = 0,
   NODE_SIM_INPUT_SCENE_TIME = 1,
 } NodeSimInputTimeType;
+
+#ifdef __cplusplus
+}
+#endif

source/blender/makesdna/DNA_object_enums.h

@@ -22,6 +22,10 @@
 
 #pragma once
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /** #Object.mode */
 typedef enum eObjectMode {
   OB_MODE_OBJECT = 0,
@@ -71,3 +75,7 @@ typedef enum eDrawType {
   (OB_MODE_EDIT | OB_MODE_VERTEX_PAINT | OB_MODE_WEIGHT_PAINT | OB_MODE_SCULPT | OB_MODE_POSE | \
    OB_MODE_PAINT_GPENCIL | OB_MODE_EDIT_GPENCIL | OB_MODE_SCULPT_GPENCIL | \
    OB_MODE_WEIGHT_GPENCIL | OB_MODE_VERTEX_GPENCIL)
+
+#ifdef __cplusplus
+}
+#endif

source/blender/makesdna/DNA_outliner_types.h

@@ -25,6 +25,10 @@
 
 #include "DNA_defs.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 struct ID;
 
 typedef struct TreeStoreElem {
@@ -128,3 +132,7 @@ enum {
          TSE_KEYMAP_ITEM, \
          TSE_ID_BASE, \
          TSE_GP_LAYER))
+
+#ifdef __cplusplus
+}
+#endif

source/blender/makesdna/DNA_packedFile_types.h

@@ -23,8 +23,16 @@
 
 #pragma once
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 typedef struct PackedFile {
   int size;
   int seek;
   void *data;
 } PackedFile;
+
+#ifdef __cplusplus
+}
+#endif

source/blender/makesdna/DNA_particle_types.h

@@ -27,6 +27,10 @@
 #include "DNA_boid_types.h"
 #include "DNA_defs.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 struct AnimData;
 
 typedef struct HairKey {
@@ -690,3 +694,7 @@ typedef enum eParticleTextureInfluence {
   PAMAP_CHILD = (PAMAP_CLUMP | PAMAP_KINK_FREQ | PAMAP_KINK_AMP | PAMAP_ROUGH | PAMAP_LENGTH |
                  PAMAP_TWIST),
 } eParticleTextureInfluence;
+
+#ifdef __cplusplus
+}
+#endif

source/blender/makesdna/DNA_pointcloud_types.h

@@ -23,6 +23,10 @@
 #include "DNA_ID.h"
 #include "DNA_customdata_types.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 typedef struct PointCloud {
   ID id;
   struct AnimData *adt; /* animation data (must be immediately after id) */
@@ -57,3 +61,7 @@ enum {
 
 /* Only one material supported currently. */
 #define POINTCLOUD_MATERIAL_NR 1
+
+#ifdef __cplusplus
+}
+#endif

source/blender/makesdna/DNA_rigidbody_types.h

@@ -27,6 +27,10 @@
 #include "DNA_listBase.h"
 #include "DNA_object_force_types.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 struct Collection;
 
 struct EffectorWeights;
@@ -368,3 +372,7 @@ typedef enum eRigidBodyCon_Flag {
 } eRigidBodyCon_Flag;
 
 /* ******************************** */
+
+#ifdef __cplusplus
+}
+#endif

source/blender/makesdna/DNA_screen_types.h

@@ -30,6 +30,10 @@
 
 #include "DNA_ID.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 struct ARegion;
 struct ARegionType;
 struct PanelType;
@@ -723,3 +727,7 @@ enum {
   /* Only editor overlays (currently gizmos only!) should be redrawn. */
   RGN_DRAW_EDITOR_OVERLAYS = 32,
 };
+
+#ifdef __cplusplus
+}
+#endif

source/blender/makesdna/DNA_sdna_types.h

@@ -22,6 +22,10 @@
 
 #pragma once
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 struct MemArena;
 
 #
@@ -118,3 +122,7 @@ typedef struct BHead8 {
   uint64_t old;
   int SDNAnr, nr;
 } BHead8;
+
+#ifdef __cplusplus
+}
+#endif

source/blender/makesdna/DNA_shader_fx_types.h

@@ -23,6 +23,10 @@
 #include "DNA_defs.h"
 #include "DNA_listBase.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 struct DRWShadingGroup;
 
 /* WARNING ALERT! TYPEDEF VALUES ARE WRITTEN IN FILES! SO DO NOT CHANGE!
@@ -251,3 +255,7 @@ typedef struct WaveShaderFxData {
   char _pad[4];
   ShaderFxData_Runtime runtime;
 } WaveShaderFxData;
+
+#ifdef __cplusplus
+}
+#endif

source/blender/makesdna/DNA_simulation_types.h

@@ -23,6 +23,10 @@
 #include "DNA_ID.h"
 #include "DNA_customdata_types.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 typedef struct Simulation {
   ID id;
   struct AnimData *adt; /* animation data (must be immediately after id) */
@@ -38,3 +42,7 @@ typedef struct Simulation {
 enum {
   SIM_DS_EXPAND = (1 << 0),
 };
+
+#ifdef __cplusplus
+}
+#endif

source/blender/makesdna/DNA_sound_types.h

@@ -25,6 +25,10 @@
 #include "DNA_ID.h"
 #include "DNA_defs.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 struct Ipo;
 struct PackedFile;
 
@@ -116,3 +120,7 @@ enum {
   SOUND_TAGS_WAVEFORM_NO_RELOAD = 1 << 0,
   SOUND_TAGS_WAVEFORM_LOADING = (1 << 6),
 };
+
+#ifdef __cplusplus
+}
+#endif

source/blender/makesdna/DNA_space_types.h

@@ -36,6 +36,10 @@
 /* Hum ... Not really nice... but needed for spacebuts. */
 #include "DNA_view2d_types.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 struct BLI_mempool;
 struct FileLayout;
 struct FileList;
@@ -1761,3 +1765,7 @@ typedef enum eSpace_Type {
 #define IMG_SIZE_FALLBACK 256
 
 /** \} */
+
+#ifdef __cplusplus
+}
+#endif

source/blender/makesdna/DNA_speaker_types.h

@@ -22,6 +22,10 @@
 
 #include "DNA_ID.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 struct AnimData;
 struct bSound;
 
@@ -57,3 +61,7 @@ typedef struct Speaker {
 #define SPK_DS_EXPAND (1 << 0)
 #define SPK_MUTED (1 << 1)
 // #define SPK_RELATIVE    (1 << 2)  /* UNUSED */
+
+#ifdef __cplusplus
+}
+#endif

source/blender/makesdna/DNA_text_types.h

@@ -28,6 +28,10 @@
 #include "DNA_ID.h"
 #include "DNA_listBase.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 typedef struct TextLine {
   struct TextLine *next, *prev;
 
@@ -84,3 +88,7 @@ enum {
   /** Use space instead of tabs. */
   TXT_TABSTOSPACES = 1 << 10,
 };
+
+#ifdef __cplusplus
+}
+#endif

source/blender/makesdna/DNA_tracking_types.h

@@ -28,6 +28,10 @@
 #include "DNA_defs.h"
 #include "DNA_listBase.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /* match-moving data */
 
 struct Image;
@@ -624,3 +628,7 @@ enum {
   PLANE_TRACK_LOCKED = (1 << 2),
   PLANE_TRACK_AUTOKEY = (1 << 3),
 };
+
+#ifdef __cplusplus
+}
+#endif

source/blender/makesdna/DNA_vec_types.h

@@ -23,6 +23,10 @@
 
 #pragma once
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /* types */
 
 /** vector of two shorts. */
@@ -90,3 +94,7 @@ typedef struct DualQuat {
   float scale[4][4];
   float scale_weight;
 } DualQuat;
+
+#ifdef __cplusplus
+}
+#endif

source/blender/makesdna/DNA_vfont_types.h

@@ -28,6 +28,10 @@
 
 #include "DNA_ID.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 struct PackedFile;
 struct VFontData;
 
@@ -59,3 +63,7 @@ typedef struct VFont {
 #define FO_CURS_IS_MOTION(mode) (ELEM(mode, FO_CURSUP, FO_CURSDOWN, FO_PAGEUP, FO_PAGEDOWN))
 
 #define FO_BUILTIN_NAME "<builtin>"
+
+#ifdef __cplusplus
+}
+#endif

source/blender/makesdna/DNA_view2d_types.h

@@ -25,6 +25,10 @@
 
 #include "DNA_vec_types.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /* ---------------------------------- */
 
 /* View 2D data - stored per region */
@@ -173,3 +177,7 @@ enum {
   V2D_ALIGN_NO_POS_Y = (1 << 2),
   V2D_ALIGN_NO_NEG_Y = (1 << 3),
 };
+
+#ifdef __cplusplus
+}
+#endif

source/blender/makesdna/DNA_view3d_enums.h

@@ -20,6 +20,10 @@
 
 #pragma once
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /** Settings for offscreen rendering */
 typedef enum eV3DOffscreenDrawFlag {
   V3D_OFSDRAW_NONE = (0),
@@ -51,3 +55,7 @@ typedef enum eV3DShadingBackgroundType {
   V3D_SHADING_BACKGROUND_WORLD = 1,
   V3D_SHADING_BACKGROUND_VIEWPORT = 2,
 } eV3DShadingBackgroundType;
+
+#ifdef __cplusplus
+}
+#endif

source/blender/makesdna/DNA_view3d_types.h

@@ -39,6 +39,10 @@ struct wmTimer;
 #include "DNA_object_types.h"
 #include "DNA_view3d_enums.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 typedef struct RegionView3D {
 
   /** GL_PROJECTION matrix. */
@@ -635,3 +639,7 @@ enum {
 /** #BKE_screen_view3d_zoom_to_fac() values above */
 #define RV3D_CAMZOOM_MIN_FACTOR 0.1657359312880714853f
 #define RV3D_CAMZOOM_MAX_FACTOR 44.9852813742385702928f
+
+#ifdef __cplusplus
+}
+#endif

source/blender/makesdna/DNA_volume_types.h

@@ -22,6 +22,10 @@
 
 #include "DNA_ID.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 struct PackedFile;
 struct VolumeGridVector;
 
@@ -148,3 +152,7 @@ typedef enum SliceAxis {
 
 /* Only one material supported currently. */
 #define VOLUME_MATERIAL_NR 1
+
+#ifdef __cplusplus
+}
+#endif

source/blender/makesdna/DNA_windowmanager_types.h

@@ -31,6 +31,10 @@
 
 #include "DNA_ID.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /* defined here: */
 struct wmWindow;
 struct wmWindowManager;
@@ -569,3 +573,7 @@ enum {
    * (the regiontype is maintained to prevent errors) */
   OP_IS_MODAL_CURSOR_REGION = (1 << 3),
 };
+
+#ifdef __cplusplus
+}
+#endif

source/blender/makesdna/DNA_workspace_types.h

@@ -24,6 +24,10 @@
 
 #include "DNA_scene_types.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #
 #
 typedef struct bToolRef_Runtime {
@@ -188,3 +192,7 @@ typedef struct WorkSpaceInstanceHook {
 typedef enum eWorkSpaceFlags {
   WORKSPACE_USE_FILTER_BY_ORIGIN = (1 << 1),
 } eWorkSpaceFlags;
+
+#ifdef __cplusplus
+}
+#endif

source/blender/makesdna/DNA_world_types.h

@@ -26,6 +26,10 @@
 #include "DNA_ID.h"
 #include "DNA_defs.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 struct AnimData;
 struct Ipo;
 struct bNodeTree;
@@ -110,3 +114,7 @@ enum {
  * otherwise anim-editors will not read correctly
  */
 #define WO_DS_SHOW_TEXS (1 << 2)
+
+#ifdef __cplusplus
+}
+#endif

source/blender/makesdna/DNA_xr_types.h

@@ -22,6 +22,10 @@
 
 #include "DNA_view3d_types.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 typedef struct XrSessionSettings {
   /** Shading settings, struct shared with 3D-View so settings are the same. */
   struct View3DShading shading;
@@ -53,3 +57,7 @@ typedef enum eXRSessionBasePoseType {
   XR_BASE_POSE_OBJECT = 1,
   XR_BASE_POSE_CUSTOM = 2,
 } eXRSessionBasePoseType;
+
+#ifdef __cplusplus
+}
+#endif

source/blender/makesdna/intern/dna_utils.h

@@ -20,6 +20,10 @@
 
 #pragma once
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 struct GHash;
 struct MemArena;
 
@@ -53,3 +57,7 @@ void DNA_alias_maps(enum eDNA_RenameDir version_dir,
 
 const char *DNA_struct_rename_legacy_hack_alias_from_static(const char *name);
 const char *DNA_struct_rename_legacy_hack_static_from_alias(const char *name);
+
+#ifdef __cplusplus
+}
+#endif