[Rd] Install Error on SGI Irix 6.5 (PR#637)

[dick@b6ori1.bauv.unibw-muenchen.de]

Hi,

I'm using R since Version 0.99 on a SGI Indigo 2 with Irix 6.5. I could compile
all Versions of R until 1.1.0.

When I try to compile Version 1.1.0 or 1.1.1 I get an error in the directory
/R-1.1.1/src/unix/X11. Trying to compile the file rbitmap.c in this directory
with the gcc compiler command

	gcc -I. -I../../../src/include -I../../../src/include
	-I../../../src/include/R_ext  -I/usr/local/include -DHAVE_CONFIG_H
	-fPIC  -g -O2 -c rbitmap.c -o rbitmap.o

results in the following errors:

	rbitmap.c: In function `R_SaveAsPng':
	rbitmap.c:168: `PNG_INTERLACE_NONE' undeclared (first use in this
	function)
	rbitmap.c:168: (Each undeclared identifier is reported only once
	rbitmap.c:168: for each function it appears in.)
	rbitmap.c:168: `PNG_COMPRESSION_TYPE_BASE' undeclared (first use in
this
	function)
	rbitmap.c:169: `PNG_FILTER_TYPE_BASE' undeclared (first use in this
	function)

This file wasn't present in the R Versions before 1.1.0.

There don't seem to be any errors in the config.log file.

Does maybe anybodey know how to solve this problem?

Thank you
Thomas Dick

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