ok thanks for the info, I modified my xvpng.c to include zlib.h
but wasnt sure which other files to modify. anyway, now I get
[jason@badman xv-3.10a]$ make
gcc -O3 -Wall -DDOPNG -I/usr/include -I/usr/include -DDOJPEG -I/usr/include -DDOTIFF -DUSE_TILED_TIFF_BOTLEFT_FIX -I/usr/include -DDOPDS -DUSLEEP -DLINUX -L/usr/X11R6/lib -DMGCSFXDIR=\"/usr/X11R6//lib/\" -DSYSCONFDIR=\"/etc\" -DXVEXECPATH=\"/usr/X11R6//lib/\" -c xvpng.c
In file included from /usr/include/pngconf.h:50:0,
from /usr/include/png.h:371,
from xvpng.c:32:
xvpng.c: In function ‘WritePNG’:
xvpng.c:428:21: error: dereferencing pointer to incomplete type ‘png_struct {aka struct png_struct_def}’
if (setjmp(png_ptr->jmpbuf)) {
^
xvpng.c:454:11: error: dereferencing pointer to incomplete type ‘png_info {aka struct png_info_def}’
info_ptr->width = w;
^~
xvpng.c: In function ‘png_xv_error’:
xvpng.c:1055:18: error: dereferencing pointer to incomplete type ‘png_struct {aka struct png_struct_def}’
longjmp(png_ptr->jmpbuf, 1);
^~
Makefile:319: recipe for target 'xvpng.o' failed
make: *** [xvpng.o] Error 1
[jason@badman xv-3.10a]$ vi xvpng.c
[jason@badman xv-3.10a]$ make
gcc -O3 -Wall -DDOPNG -I/usr/include -I/usr/include -DDOJPEG -I/usr/include -DDOTIFF -DUSE_TILED_TIFF_BOTLEFT_FIX -I/usr/include -DDOPDS -DUSLEEP -DLINUX -L/usr/X11R6/lib -DMGCSFXDIR=\"/usr/X11R6//lib/\" -DSYSCONFDIR=\"/etc\" -DXVEXECPATH=\"/usr/X11R6//lib/\" -c xvpng.c
In file included from /usr/include/pngconf.h:50:0,
from /usr/include/png.h:371,
from xvpng.c:32:
xvpng.c: In function ‘WritePNG’:
xvpng.c:428:21: error: dereferencing pointer to incomplete type ‘png_struct {aka struct png_struct_def}’
if (setjmp(png_ptr->jmpbuf)) {
^
xvpng.c:454:11: error: dereferencing pointer to incomplete type ‘png_info {aka struct png_info_def}’
info_ptr->width = w;
^~
xvpng.c: In function ‘png_xv_error’:
xvpng.c:1055:18: error: dereferencing pointer to incomplete type ‘png_struct {aka struct png_struct_def}’
longjmp(png_ptr->jmpbuf, 1);
^~
Makefile:319: recipe for target 'xvpng.o' failed
make: *** [xvpng.o] Error 1
[jason@badman xv-3.10a]$
which I guess is making progress..
-db
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