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Author SHA1 Message Date
Nico Weber 05bc8c52e9 Fix sysroot-prefix.c on Windows (/ vs \). 
llvm-svn: 268797
 2016-05-06 21:17:32 +00:00
Saleem Abdulrasool 72315ab4e4 test: attempt to repair windows build 
Replace use of /dev/null with /var/empty.  lit will substitute the /dev/null
include path resulting in failures.  Use a path under /var/empty which is
supposed to be empty to ensure that we can successfully test.

llvm-svn: 268784
 2016-05-06 19:39:00 +00:00
Saleem Abdulrasool de87e5f875 Frontend: support -I=path for sysroot expansion 
From the GCC manpage:

  -I dir
    ... If dir begins with =, then the = will be replaced by the sysroot prefix;
    see --sysroot and -isysroot.

Add support to expand the `=` as a prefix of the include path with the sysroot
if specified.  `-isysroot` takes precedence over `--sysroot` as the normal
argument behaviour occurs.  The ordering of the `-isysroot` is relevant to the
path substituted.  If no `--sysroot=` or `-isysroot` option is present, the = is
not expanded.

Resolves PR26965!

llvm-svn: 268777
 2016-05-06 19:13:55 +00:00