Revert "libgimpmath: #pragma once"

This reverts commit 74bf171611.

See https://gitlab.gnome.org/GNOME/gimp/-/issues/14668

libgimpmath/gimpmath.h

@@ -18,7 +18,9 @@
  * <https://www.gnu.org/licenses/>.
  */
 
-#pragma once
+#ifndef __GIMP_MATH_H__
+#define __GIMP_MATH_H__
+
 
 #include <math.h>
 
@@ -39,8 +41,10 @@
 
 #undef __GIMP_MATH_H_INSIDE__
 
+
 G_BEGIN_DECLS
 
+
 /**
  * SECTION: gimpmath
  * @title: GimpMath
@@ -142,4 +146,7 @@ G_BEGIN_DECLS
  **/
 #define gimp_rad_to_deg(angle) ((angle) * 360.0 / (2.0 * G_PI))
 
+
 G_END_DECLS
+
+#endif /* __GIMP_MATH_H__ */

libgimpmath/gimpmathtypes.h

@@ -18,10 +18,13 @@
  * <https://www.gnu.org/licenses/>.
  */
 
-#pragma once
+#ifndef __GIMP_MATH_TYPES_H__
+#define __GIMP_MATH_TYPES_H__
+
 
 #include <libgimpbase/gimpbasetypes.h>
 
+
 G_BEGIN_DECLS
 
 typedef struct _GimpMatrix2 GimpMatrix2;
@@ -125,4 +128,7 @@ struct _GimpVector4
   gdouble x, y, z, w;
 };
 
+
 G_END_DECLS
+
+#endif /* __GIMP_MATH_TYPES_H__ */

libgimpmath/gimpmatrix.h

@@ -19,12 +19,13 @@
  * <https://www.gnu.org/licenses/>.
  */
 
-#pragma once
-
 #if !defined (__GIMP_MATH_H_INSIDE__) && !defined (GIMP_MATH_COMPILATION)
 #error "Only <libgimpmath/gimpmath.h> can be included directly."
 #endif
 
+#ifndef __GIMP_MATRIX_H__
+#define __GIMP_MATRIX_H__
+
 G_BEGIN_DECLS
 
 /* For information look into the C source or the html documentation */
@@ -150,4 +151,7 @@ gdouble       gimp_matrix4_transform_point (const GimpMatrix4 *matrix,
                                             gdouble           *newy,
                                             gdouble           *newz);
 
+
 G_END_DECLS
+
+#endif /* __GIMP_MATRIX_H__ */

libgimpmath/gimpvector.h

@@ -22,12 +22,13 @@
  * <https://www.gnu.org/licenses/>.
  */
 
-#pragma once
-
 #if !defined (__GIMP_MATH_H_INSIDE__) && !defined (GIMP_MATH_COMPILATION)
 #error "Only <libgimpmath/gimpmath.h> can be included directly."
 #endif
 
+#ifndef __GIMP_VECTOR_H__
+#define __GIMP_VECTOR_H__
+
 G_BEGIN_DECLS
 
 /* For information look into the C source or the html documentation */
@@ -153,4 +154,7 @@ void        gimp_vector_3d_to_2d           (gint               sx,
                                             const GimpVector3 *vp,
                                             const GimpVector3 *p);
 
+
 G_END_DECLS
+
+#endif  /* __GIMP_VECTOR_H__ */