tree 08558b187a365226c499c7986775f38be30b0809
parent 488bd9657dd33fdde5fc9a8637463e039bcc2f11
author Louis Dionne <ldionne.2@gmail.com> 1623797258 -0400
committer Copybara-Service <copybara-worker@google.com> 1627596310 -0700

[runtimes] Always build libc++, libc++abi and libunwind with -fPIC

Building the libraries with -fPIC ensures that we can link an executable
against the static libraries with -fPIE. Furthermore, there is apparently
basically no downside to building the libraries with position independent
code, since modern toolchains are sufficiently clever.

This commit enforces that we always build the runtime libraries with -fPIC.
This is another take on D104327, which instead makes the decision of whether
to build with -fPIC or not to the build script that drives the runtimes'
build.

Fixes http://llvm.org/PR43604.

Differential Revision: https://reviews.llvm.org/D104328

GitOrigin-RevId: 21c24ae9029a1fcd1c76b61b1c48b81b5c66c606