rust.pdf fails to build when src directory is absolute

[brson]

When configuring the build with an absolute source directory, and tex and texi2pdf are installed, this error happens:

version-stamp: doc/version.texi
makeinfo: doc/rust.html
texi2pdf: doc/rust.pdf
egrep: Invalid range end
/usr/bin/texi2dvi: cannot read .//home/banderson/Dev/rustbot/workspace-try-x86_64-unknown-linux-gnu/src/doc/rust.texi, skipping.
make: *** [doc/rust.pdf] Error 1

[elly]

This is caused by the 'egrep: Invalid range end' error on the line above. On my system, texi2dvi does this:

If the COMMAND_LINE_FILENAME is not absolute (e.g., --debug.tex),

prepend `./' in order to avoid that the tools take it as an option.

echo "$command_line_filename" | $EGREP '^(/|[A-z]:/)' >&6
|| command_line_filename="./$command_line_filename"

The egrep on my system doesn't accept 'A-z' as a range, so it bails and we always end up with a './' prepended.

[elly]

Hmm... https://bugzilla.redhat.com/show_bug.cgi?id=583011

[elly]

https://github.com/graydon/rust/pull/1136 fixes this bug and the egrep warning.