Unnecessary recompilation when building julia

[mikewl]

• Your Windows build number: Version 10.0.16199.1000]

• What you're doing and what's happening: Trying to build Julia in Bash on Windows

• What's wrong / what should be happening instead: gmp, mpfr and patchelf are requiring dependendices which should not be required.

Currently when building Julia in wsl the above mentioned dependencies seem to want to recompile things that have been provided already. It was mentioned by @vtjnash that this may be a filesystem bug relating to timestamps.

[therealkenc]

Are you doing the build in DrvFS (/mnt/c/Users/you) or in VolFS (/home/you)? Could be #1939.

[mikewl]

probably a dupe of #1939

[tkelman]

definitely a duplicate of the originally reported issue in #544, if things work in /home/

[tkelman]

has more in common with #2025 since it'star that Julia's build system is relying on to behave like unix with respect to time stamps (or rather we're extracting and building a number of autotools based projects, all of which are going to rely on time stamps), more than cp. but the file system deficiency is the root cause.

[therealkenc]

/dupe #1939

[ghost]

Hi! We've identified this issue as a duplicate of another one that already exists in this repository. This specific instance is being closed in favor of tracking the concern over on the referenced thread.

Thanks for your report!