Build fails when in a path containing spaces

I’ve run into what appears to be an odd bug with the autoconf-based build when run in a path containing spaces:

LLVM_SRC_ROOT := $(call realpath, /path/with some/spaces)

in Makefile.config returns empty string, while:

LLVM_SRC_ROOT := $(call realpath, /path/without/spaces)

returns the expected “/path/without/spaces”.

This breaks the build from the very start.

(This is on Ubuntu 11.10.)


See also;

We assume build dir must be sane.

It would be a bug, if generated toolchain (clang, llc, opt &c) did not
accept whitespace paths.