spkg-install improvements

[felixs]

The build system #14796 works better with some minor tweaks to some spkg-install scripts.

• with idempotence, "keepbuilt" starts to make sense
• without hardwired paths, compiling with packages disabled (=fallback to system) works
• with environment in $SAGE_ETC/env.d/*, run time environment is more flexible
• with a list of files that belong to a package, unstaging is easy.
• setting write permissions for copied files allows cleanup, even if the source files are not writable

these changes are minimal (for each package) and are intended to not break the old build system. This is a series of individual patches. Opening up ~100 tickets doesn't seem appropriate.

[git]

Branch pushed to git repo; I updated commit sha1. New commits:

[changeset:056ae2b]	gcc: spkg-install idempotence
[changeset:0147680]	gap: spkg-install
[changeset:0b18022]	flintqs: spkg-install
[changeset:69d0d54]	flint: spkg-install
[changeset:8dde291]	fflas_ffpack: spkg-install, fix idempotence
[changeset:ff10222]	elliptic_curves: spkg-install, fix idempotence
[changeset:e15cbc7]	ecm: spkg-install misc
[changeset:15b3405]	eclib: spkg
[changeset:522420f]	ecl: spkg-install
[changeset:e41996c]	docutils: use sage-setup.py
[changeset:c7e949b]	cython: spkg-install
[changeset:a2e0f49]	cvxopt: spkg-install, idempotence, filelist
[changeset:d076fdb]	conway_polynomials: spkg-install
[changeset:5c52c6e]	cliquer: spkg-install
[changeset:135b66b]	cephes: patch quickfix
[changeset:d1e078b]	cddlib: fix permissions
[changeset:9b56d97]	boehm_gc: spkg-install

[felixs]

I have set "needs_review", subsequent commits will be independent.

[git]

Branch pushed to git repo; I updated commit sha1. New commits:

[changeset:06d1ff1]	mpir: spkg-install
[changeset:e047964]	mpc: spkg-install idempotence, cleanup
[changeset:7565e7d]	maxima: spkg-install
[changeset:68c1a8d]	matplotlib: spkg-install
[changeset:1a0fe61]	linbox: spkg-install
[changeset:786c1bc]	lcalc: spkg-install idempotence
[changeset:d29271e]	lapack: spkg-install
[changeset:08ca8c2]	jinja2: spkg-install, filelist etc
[changeset:0419220]	ipython spkg-install idempotence
[changeset:7163f7f]	iml: spkg-install idempotence
[changeset:477b152]	givaro: spkg-install
[changeset:e4b0ac8]	graphs spkg-install
[changeset:de59617]	gsl: spkg-install idempotence
[changeset:f956538]	gfan: spkg-install
[changeset:939287a]	gdmodule: spkg-install

[git]

Branch pushed to git repo; I updated commit sha1. New commits:

[changeset:ccf9e10]	rpy2: spkg-install
[changeset:794dd8b]	readline: spkg-install idempotence
[changeset:26f4f8a]	ratpoints: spkg-install idempotence
[changeset:6767c87]	r: spkg-install
[changeset:b8238a4]	python: spkg-install
[changeset:b5d1421]	pygments: spkg-install idempotence
[changeset:85cbe8d]	pycrypto: filelist
[changeset:190ea4a]	ppl: spkg-install idempotence
[changeset:1298667]	polytopes_db: spkg-install
[changeset:c81193a]	polybori: spkg-install
[changeset:f25da01]	pil: spkg-install
[changeset:cfb562c]	pexpect: spkg-install
[changeset:f8091b6]	pari: spkg
[changeset:8c31502]	palp: spkg-install
[changeset:0cae935]	numpy: spkg-install
[changeset:bb1afa3]	ntl: spkg-install idempotence
[changeset:270967d]	ncurses: idempotence
[changeset:3842e72]	mpmath: spkg-install, sage-setup.py, filelist

[git]

Branch pushed to git repo; I updated commit sha1. New commits:

[changeset:77481b8]	atlas: spkg-install
[changeset:3388eb3]	zn_poly: idempotence
[changeset:3576102]	zlib: spkg-install idempotence
[changeset:a4b7767]	termcap: spkg-install idempotence
[changeset:17a1b82]	sympow: spkg
[changeset:93cf3a3]	symmetrica: spkg-install
[changeset:09055d0]	sqlite: spkg-install idempotence
[changeset:fabcb32]	sqlalchemy: filelist
[changeset:20c5c9f]	sphinx: spkg-install
[changeset:5ded6fc]	setuptools: spkg-install
[changeset:0190cf6]	scipy spkg-install idempotence
[changeset:91e423d]	sagetex: spkg-install, makefile, filelist

[git]

Branch pushed to git repo; I updated commit sha1. New commits:

[changeset:f623de8]	flint: create directory before putting file into it
[changeset:80c1cd3]	pari: cleanup
[changeset:a51658f]	tachyon. make sure "bin" exists, and use spkg-dist-install
[changeset:2ae993b]	linbox: remove extra/broken CFLAGS env
[changeset:c166678]	delete stray backup

[jdemeyer]

Needs to be rebased.

[embray]

It's too bad this never went anywhere since it was a lot of work. It seems to be redundant though with what I'm doing with #23160 #22509, and #22510.

[mkoeppe]

Outdated, should be closed