http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57795
Yaakov (Cygwin Ports) <yselkowitz at users dot sourceforge.net> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |yselkowitz at users dot sourceforg | |e.net --- Comment #1 from Yaakov (Cygwin Ports) <yselkowitz at users dot sourceforge.net> --- I also ran into this when cross-compiling a native gcc with Ada (i686-pc-cygwin/x86_64-pc-cygwin/x86_64-pc-cygwin) in the process of porting GNAT to a new platform. In fact, I believe this would happen any time $build != $host (regardless of $target), but NOT with the typical cross-compiler ($build == $host, $host != $target). The root of the problem is RTS_DIR override (immediately prior to gnattools-cross rule) in gnattools/Makefile.in, which calls gnatls (for $build) where IIUC it should be something like $(GNATMAKE:gnatmake=gnatls) (for $host). There is another problem in this situation: in gcc/ada/gcc-interface/Make-lang.in, the xgnatugn rule (part of building doc/projects.texi and doc/gnat_ugn.texi) calls $(GNATMAKE), resulting in a xgnatugn which runs on $host instead of $build; this probably needs to be just gnatmake instead.