error: 'GeglOp' undeclared

[Florent Monnier <fmonnier@xxxxxxxxxxxxxxxxxxxxxx>]

> pkg-config --cflags gegl
> will give you the compilation flags.
>
> pkg-config --libs gegl
> will give you the linker flags.

gcc -o test-01 `pkg-config --libs gegl` `pkg-config --cflags gegl` test-01.c

Here is the error I get:

test-01.c: In function 'main':
test-01.c:11: error: 'GeglOp' undeclared (first use in this function)
test-01.c:11: error: (Each undeclared identifier is reported only once
test-01.c:11: error: for each function it appears in.)
test-01.c:11: error: 'color0' undeclared (first use in this function)
test-01.c:12: error: 'color1' undeclared (first use in this function)
test-01.c:13: error: 'iadd' undeclared (first use in this function)
test-01.c:15: error: 'GEGL_TYPE_COLOR' undeclared (first use in this function)
test-01.c:23: error: 'GEGL_TYPE_I_ADD' undeclared (first use in this function)


Here the exemple 'test-01.c' I'm trying to compile:
-- 
#include "gegl.h"

   /*   Set up to add two constant color images.
         (.6,.8,1.0) = (.1,.2,.3) + (.5,.6,.7)   */

int main(void)
{
    GeglOp *color0;
    GeglOp *color1;
    GeglOp *iadd;

    color0 = g_object_new (GEGL_TYPE_COLOR,
                        "pixel-rgb-float", .1, .2, .3,
                        NULL);

    color1 = g_object_new (GEGL_TYPE_COLOR,
                        "pixel-rgb-float", .5, .6, .7,
                        NULL);

    iadd = g_object_new (GEGL_TYPE_I_ADD,
                      "source-0", color0,
                      "source-1", color1,
                      NULL);
}


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