On windows under current R-devel (r57066), R CMD INSTALL, for instance, invokes gcc with -I"$(R_HOME)/include" prior to any user-defined include paths. This means that a package cannot specify an alternative zlib.h, as a (reduced) version of this is in $(R_HOME)/include.

One way around this is to redefine .o rules

%.o: %.c
        $(CC) $(MY_ZFLAGS) $(ALL_CPPFLAGS) $(ALL_CFLAGS) -c $< -o $@

Is there a better way? Can the ordering of the include search path be altered in src/gnuwin32/fixed/etc/Makeconf:160-161?

Martin
--
Computational Biology
Fred Hutchinson Cancer Research Center
1100 Fairview Ave. N. PO Box 19024 Seattle, WA 98109

Location: M1-B861
Telephone: 206 667-2793

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