bootstrap should use the autotools installed in SAGE_LOCAL/bin if available

[mkoeppe]

... this is so that it does not have to rely on downloading the generated files, nor on an external installation of the autotools (which is convenient on Mac OS X because one has to remove fink from PATH).

This patch sources src/bin/sage-env in order to augment PATH just before calling the autotools.

Depends on #21047

CC: @jdemeyer @videlec @embray @nexttime @vbraun @jpflori @dimpase

Component: build

Author: Matthias Koeppe

Branch/Commit: 2f30faf

Reviewer: Dima Pasechnik

Issue created by migration from https://trac.sagemath.org/ticket/21214

[mkoeppe]

Branch: u/mkoeppe/bootstrap_should_use_the_autotools_installed_in_sage_local_bin_if_available

[mkoeppe]

Author: Matthias Koeppe

[mkoeppe]

New commits:

2f30faf

bootstrap: Get autotools from our own package into PATH

[mkoeppe]

Commit: 2f30faf

[dimpase]

comment:4

src/bin/ != SAGE_LOCAL/bin/; thus either the branch or the ticket description is wrong.

[dimpase]

comment:6

the title still says "bootstrap should use the autotools installed in SAGE_LOCAL/bin if available".

[nexttime]

comment:7

Replying to @dimpase:

the title still says "bootstrap should use the autotools installed in SAGE_LOCAL/bin if available".

... which is correct.

[dimpase]

Reviewer: Dima Pasechnik

[dimpase]

comment:8

ok, good, sorry for confusion.

[vbraun]

Changed branch from u/mkoeppe/bootstrap_should_use_the_autotools_installed_in_sage_local_bin_if_available to 2f30faf