Put prereq under revision control

[jdemeyer]

The contents of the prereq tarball are currently not under revision control. Fix this. Only non-automatically generated files are put under revision control, these are:

C .hgignore
C .hgtags
C Makefile.am
C configure.ac
C m4/ax_c_check_flag.m4
C m4/ax_gcc_option.m4
C m4/ax_gcc_version.m4
C m4/ax_gxx_option.m4
C m4/ax_gxx_version.m4
C m4/ax_prog_perl_version.m4

Further changes:

1. In configure.ac, comment AC_CONFIG_HEADERS([config.h]) as we don't need this header.

2. Remove some unneeded files, in particular the autom4te.cache directory.

3. Compress the prereq tarball using gzip. Note that gzip has always been a dependency of Sage, since the bzip2 package is gzip-compressed.

Apply attachment: 12739_prereq_tar_gz.patch to the SAGE_ROOT repository

Delete the old SAGE_ROOT/spkg/base/prereq-0.9.tar

Download http://boxen.math.washington.edu/home/jdemeyer/spkg/prereq-0.9.tar.gz to SAGE_ROOT/spkg/base

CC: @jhpalmieri

Component: packages: standard

Author: Jeroen Demeyer

Reviewer: John Palmieri

Merged: sage-5.0.beta12

Issue created by migration from https://trac.sagemath.org/ticket/12739

[jdemeyer]

First and only commit in the prereq tarball, for review only

[jdemeyer]

comment:1

Attachment: prereq-0.9.diff.gz

[jdemeyer]

comment:5

Attachment: 12739_prereq_tar_gz.patch.gz

[jhpalmieri]

Reviewer: John Palmieri

[jhpalmieri]

comment:7

This looks fine to me. The version should get updated soon, but I guess that happens in #12112.

[jdemeyer]

Merged: sage-5.0.beta12