stereograph make fail

shawn@shawn-VGN-CR120E:~/stereograph-0.30a$ make

gcc -Wall -O2 -Dlinux   -c -o stereograph.o stereograph.c

stereograph.c: In function ‘parse_args’:

stereograph.c:358:11: warning: implicit declaration of function ‘strcmp’ [-Wimplicit-function-declaration]

       if(!strcmp(argv[++z], "png"))

           ^~~~~~

gcc -Wall -O2 -Dlinux   -c -o renderer.o renderer.c

renderer.c: In function ‘NormalScan’:

renderer.c:317:2: warning: implicit declaration of function ‘memcpy’ [-Wimplicit-function-declaration]

  memcpy(stereo_data + Renderer.startx, texture_data, Texture.Width * sizeof(int));

  ^~~~~~

renderer.c:317:2: warning: incompatible implicit declaration of built-in function ‘memcpy’

renderer.c:317:2: note: include ‘<string.h>’ or provide a declaration of ‘memcpy’

renderer.c: In function ‘ZoomScan’:

renderer.c:454:3: warning: incompatible implicit declaration of built-in function ‘memcpy’

   memcpy(stereo_data + Stereo.Width*a, stereo_data, Stereo.Width * sizeof(int));

   ^~~~~~

renderer.c:454:3: note: include ‘<string.h>’ or provide a declaration of ‘memcpy’

renderer.c: In function ‘ZoomAAScan’:

renderer.c:523:3: warning: incompatible implicit declaration of built-in function ‘memcpy’

   memcpy(stereo_data + Stereo.Width*a, stereo_data, Stereo.Width*sizeof(int));

   ^~~~~~

renderer.c:523:3: note: include ‘<string.h>’ or provide a declaration of ‘memcpy’

gcc -Wall -O2 -Dlinux   -c -o gfxio.o gfxio.c

gfxio.c: In function ‘Resize_GFX’:

gfxio.c:104:4: warning: implicit declaration of function ‘memcpy’ [-Wimplicit-function-declaration]

    memcpy(temp_gfx + y * width, gfx->Data + gfx->Width * y, width*sizeof(int));

    ^~~~~~

gfxio.c:104:4: warning: incompatible implicit declaration of built-in function ‘memcpy’

gfxio.c:104:4: note: include ‘<string.h>’ or provide a declaration of ‘memcpy’

gfxio.c: In function ‘Write_Gfx_File’:

gfxio.c:237:7: warning: implicit declaration of function ‘strlen’ [-Wimplicit-function-declaration]

    if(strlen(file_name) >= 4) {

       ^~~~~~

gfxio.c:237:7: warning: incompatible implicit declaration of built-in function ‘strlen’

gfxio.c:237:7: note: include ‘<string.h>’ or provide a declaration of ‘strlen’

gfxio.c:238:9: warning: implicit declaration of function ‘strcmp’ [-Wimplicit-function-declaration]

     if(!strcmp(file_name + strlen(file_name) - 4, ".tga"))

         ^~~~~~

gfxio.c: In function ‘Read_PPM’:

gfxio.c:331:4: warning: this ‘while’ clause does not guard... [-Wmisleading-indentation]

    while(isspace(a = fgetc(ifile))); ungetc(a, ifile);

    ^~~~~

gfxio.c:331:38: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the ‘while’

    while(isspace(a = fgetc(ifile))); ungetc(a, ifile);

                                      ^~~~~~

gfxio.c:333:4: warning: this ‘while’ clause does not guard... [-Wmisleading-indentation]

    while(isspace(a = fgetc(ifile))); ungetc(a, ifile);

    ^~~~~

gfxio.c:333:38: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the ‘while’

    while(isspace(a = fgetc(ifile))); ungetc(a, ifile);

                                      ^~~~~~

gfxio.c:335:4: warning: this ‘while’ clause does not guard... [-Wmisleading-indentation]

    while(isspace(a = fgetc(ifile))); ungetc(a, ifile);

    ^~~~~

gfxio.c:335:38: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the ‘while’

    while(isspace(a = fgetc(ifile))); ungetc(a, ifile);

                                      ^~~~~~

gfxio.c:339:3: warning: this ‘while’ clause does not guard... [-Wmisleading-indentation]

   while(isspace(a = fgetc(ifile))); ungetc(a, ifile);

   ^~~~~

gfxio.c:339:37: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the ‘while’

   while(isspace(a = fgetc(ifile))); ungetc(a, ifile);

                                     ^~~~~~

In file included from /usr/include/pngconf.h:50:0,

                 from /usr/include/png.h:364,

                 from gfxio.c:26:

gfxio.c: In function ‘Read_PNG’:

gfxio.c:393:21: error: dereferencing pointer to incomplete type ‘png_struct {aka struct png_struct_def}’

   if (setjmp(png_ptr->jmpbuf)) {

                     ^

gfxio.c: In function ‘Read_TARGA’:

gfxio.c:536:2: warning: incompatible implicit declaration of built-in function ‘memcpy’

  memcpy(header, check_header, sizeof(char)*8);

  ^~~~~~

gfxio.c:536:2: note: include ‘<string.h>’ or provide a declaration of ‘memcpy’

In file included from gfxio.c:21:0:

gfxio.c: In function ‘Write_TARGA’:

gfxio.c:697:7: warning: incompatible implicit declaration of built-in function ‘strlen’

  putc(strlen("created by stereograph"), ofile);

       ^

gfxio.c:697:7: note: include ‘<string.h>’ or provide a declaration of ‘strlen’

<builtin>: recipe for target 'gfxio.o' failed

make: *** [gfxio.o] Error 1

shawn@shawn-VGN-CR120E:~/stereograph-0.30a$