URL:
<https://savannah.gnu.org/support/?110394>
Summary: Support optional use of the C++ compiler in
AC_PROG_CXX (and similarly for other languages)
Project: Autoconf
Submitted by: zackw
Submitted on: Sun 06 Dec 2020 10:25:57 PM UTC
Category: None
Priority: 5 - Normal
Severity: 1 - Wish
Status: None
Privacy: Public
Assigned to: None
Originator Email:
Open/Closed: Open
Discussion Lock: Any
Operating System: None
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Details:
Bug #110294 reports a regression in autoconf 2.70 on the configure script for
a program that has some C and some C++ code, but use of the C++ code is
optional. The code that broke attempts to do most of what AC_PROG_CXX does,
but *not* abort the configure script when a C++ compiler is not found.
Instead, output variables would be set so that compilation of C++ code is
disabled.
We do not want to support this particular kludge, as it would pin down the
guts of AC_PROG_CXX too much, but we _should_ support optional use of the
$LANG compiler (for all values of $LANG). Perhaps with an additional argument
to AC_PROG_CC, AC_PROG_CXX, etc, marking usage optional.
See also bug #110286.
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