[Tcl-bugs] [ tcl-Bugs-1777301 ] TEA: --exec-prefix not set from --prefix

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Bugs item #1777301, was opened at 2007-08-19 13:26
Message generated for change (Settings changed) made by hobbs
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Category: 85. tclconfig
Group: None
>Status: Pending
>Resolution: Works For Me
Priority: 5
Private: No
Submitted By: Rolf Ade (pointsman)
Assigned to: Jeffrey Hobbs (hobbs)
Summary: TEA: --exec-prefix not set from --prefix

Initial Comment:


A typical TEA 3.6 configure --help claims, that the default of --exec-prefix is set from prefix. Or at least, that is, how I understand it (reformated

Installation directories:
  --prefix=PREFIX
    install architecture-independent files in PREFIX [/usr/local]
  --exec-prefix=EPREFIX
    install architecture-dependent files in EPREFIX                   [PREFIX]

But, if --prefix=/some/path is given to configure, the generated Makefile has:

...
prefix          = /some/path
exec_prefix     = /usr/local
...

It seems, that exec_prefix is always set to the prefix default; there's code in TEA_INIT, which seems to do this.

Note, that there is no real problem. Using both --prefix and --exec-prefix works.

Just make the software do, what the doc (--help) say, or make the doc say, what the software really does.


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Comment By: Jeffrey Hobbs (hobbs)
Date: 2008-11-04 14:06

Message:
Actually Tcl's TEA_PREFIX does set exec_prefix to prefix, but it may be
that autoconf (which handles this at a meta level) does it's own magic.  A
patch for what you intend against TEA_PREFIX would be good.  Otherwise it
is working as expected.

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Comment By: Rolf Ade (pointsman)
Date: 2007-09-08 17:29

Message:
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No, --prefix and --exec_prefix are not superfluous at all for a Tcl
extension. I love it, that I have the freedom, to compile my extenstion
against a certain tcl installation (given by --with-tcl) and to install the
result in a place of my choice, other than $(pkglibdir). Yes, I handle the
auto_path manipulation, to get the extension version, I want, don't care
about that.

That is currently possible, and that's fine. In case of an extension with
binary code, the user just has to provide both, --prefix and --exec-prefix.
Although the help suggests, that the --exec-prefix default is set from the
--prefix value. With isn't true. Nitpik.

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Comment By: Joe English (jenglish)
Date: 2007-09-06 20:51

Message:
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Probably can't change the help text; you get that for free from autoconf
whether you want it or not.

However, for Tcl extensions, --prefix, --exec_prefix, and all of the
subsidiary install directories are superfluous: the only installation
directory TEA uses is $(pkglibdir).

$(pkglibdir) is normally specified as a subdirectory of $(libdir) in
Makefile.in; $(libdir) in turn defaults to ${exec_prefix}/lib; and
${exec_prefix} is set to ${TCL_EXEC_PREFIX} by the TEA_PREFIX autoconf
macro.  (The value of TCL_EXEC_PREFIX is found in tclConfig.sh; it's set to
the value of @exec_prefix@ used when configuring Tcl.)


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