#11359: ECL does not fully recover from relocation
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Reporter: nbruin | Owner: GeorgSWeber
Type: defect | Status: needs_review
Priority: blocker | Milestone: sage-5.10
Component: packages: standard | Resolution:
Keywords: ecl relocation | Work issues:
Report Upstream: N/A | Reviewers:
Authors: Jeroen Demeyer | Merged in:
Dependencies: | Stopgaps:
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Comment (by nbruin):
Replying to [comment:19 leif]:
> For the record: In contrast to `C_INCLUDE_PATH` etc., `CPPFLAGS` (and
`CFLAGS` etc.) are '''never''' read by the compiler / preprocessor; their
names are just ''conventions'' used in '''Makefiles''' (and `make`'s
default rules).
Ah, OK. For ECL it does have a meaning: the value gets inherited as hard-
wired default value for `c::*cc-flags*`. There also is `c::*ecl-include-
directory*`, so including `-I` directives in `CPPFLAGS` leads to
superfluous includes passed to `ecl` compiler invocations. That would be
one reason to try to get rid of it.
The other issue is that ecl by design hard-wires the default value of `c
::*ecl-include-directory*`, which is the real obstacle to relocating ecl.
We can change that by patching ecl (but since the current behaviour is
likely not considered a bug for ecl, we'd be doing that indefinitely) or
we can work around it by configuring ecl to include a different setting
(as outlined above, with the `--with-extra-files` and `--with-init-form`
directives). [Note that this change is only required if sage builds a
"private ecl" (as it does normally). If sage were to rely on an ecl
supplied via other means, we wouldn't be responsible for relocating it.]
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11359#comment:20>
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