Do not stage .pc files in src/lib/, clean old generated *.pc files at 'make distclean', fix 'permission denied' errors #29082
Description
#29003 introduced 2-stage installation of generated *.pc files,
via src/lib/pkgconfig- but did not provide a way to clean them up at all. And this is a problem (cf. e.g. #29071).
Also, in some installations, repeated installations this code leads to 'permission denied' errors when trying to overwrite read-only files:
[openblas-0.3.6.p0] Wrote /Users/mkoeppe/s/sage/sage-rebasing/worktree-algebraic-2018-spring/.tox/local-homebrew-minimal/local/var/tmp/sage/build/openblas-0.3.6.p0/inst/Users/mkoeppe/s/sage/sage-rebasing/worktree-algebraic-2018-spring/.tox/local-homebrew-minimal/local/lib/pkgconfig/blas.pc
[openblas-0.3.6.p0] Wrote /Users/mkoeppe/s/sage/sage-rebasing/worktree-algebraic-2018-spring/.tox/local-homebrew-minimal/local/var/tmp/sage/build/openblas-0.3.6.p0/inst/Users/mkoeppe/s/sage/sage-rebasing/worktree-algebraic-2018-spring/.tox/local-homebrew-minimal/local/lib/pkgconfig/cblas.pc
[openblas-0.3.6.p0] Wrote /Users/mkoeppe/s/sage/sage-rebasing/worktree-algebraic-2018-spring/.tox/local-homebrew-minimal/local/var/tmp/sage/build/openblas-0.3.6.p0/inst/Users/mkoeppe/s/sage/sage-rebasing/worktree-algebraic-2018-spring/.tox/local-homebrew-minimal/local/lib/pkgconfig/lapack.pc
[openblas-0.3.6.p0]
[openblas-0.3.6.p0] real 8m40.259s
[openblas-0.3.6.p0] user 45m2.739s
[openblas-0.3.6.p0] sys 5m48.754s
[openblas-0.3.6.p0] Copying package files from temporary location /Users/mkoeppe/s/sage/sage-rebasing/worktree-algebraic-2018-spring/.tox/local-homebrew-minimal/local/var/tmp/sage/build/openblas-0.3.6.p0/inst to /Users/mkoeppe/s/sage/sage-rebasing/worktree-algebraic-2018-spring/.tox/local-homebrew-minimal/local
[openblas-0.3.6.p0] cp: /Users/mkoeppe/s/sage/sage-rebasing/worktree-algebraic-2018-spring/.tox/local-homebrew-minimal/local/./lib/pkgconfig/cblas.pc: Permission denied
[openblas-0.3.6.p0] cp: /Users/mkoeppe/s/sage/sage-rebasing/worktree-algebraic-2018-spring/.tox/local-homebrew-minimal/local/./lib/pkgconfig/blas.pc: Permission denied
[openblas-0.3.6.p0] cp: /Users/mkoeppe/s/sage/sage-rebasing/worktree-algebraic-2018-spring/.tox/local-homebrew-minimal/local/./lib/pkgconfig/lapack.pc: Permission denied
This ticket revises the installation as follows:
configureno longer creates .pc files in the build tree- Instead it creates rules in
make/Makefilethat create the .pc files inSAGE_LOCAL. - Before pc files are installed into
SAGE_LOCAL, the targets are removed, to avoid permission problems
This ticket does not solve everything. There may still be problems when switching from a system library to an spkg-provided library. We will use the follow-up ticket #29387 (Complete solution for installing the generated *.pc files) to address this problem.
CC: @embray @mkoeppe @jhpalmieri @vbraun @kiwifb
Component: build: configure
Author: Matthias Koeppe
Branch/Commit: 329843b
Reviewer: Dima Pasechnik
Issue created by migration from https://trac.sagemath.org/ticket/29082