[bug #62700] lzma/xz compilation bug for cmake in Maneage 27ff6f7

[Boud Roukema]

Follow-up Comment #6, bug #62700 (project reproduce):

While it is useful for xz to protect against the CentOS 7 mess, in principle,
Maneage should not have detected the error, since we build both _xz_ and
_cmake_.

However, commit 2a3304cfb of Maneage from Dec 2018 by Mohammad [1] changes
from

-       ./bootstrap --prefix=$(idir) && make && make install && \

to

+       ./bootstrap --prefix=$(idir) --system-curl --system-zlib \
+                    --system-bzip2 --system-liblzma &&          \

in the _high-level.mk_ rule for building _cmake_.

This makes _cmake_ dependent on the host system, and helped to detect the _xz_
problem on CentOS 7. However, detecting bugs is not our primary aim :).

Is there any good reason for building _cmake_ on the host system _curl_,
_zlib_, _bzip2_, and _liblzma_?

If not, then I propose to remove all four of these _--system-X_ options from
the _cmake_ build rule.


[1]
http://git.maneage.org/project.git/commit/?id=2a3304cfb832d2f9548bb869f5a44a3412a1c3f9


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