URL:
<https://savannah.gnu.org/support/?110400>
Summary: autoconf 2.70 no longer supports clang with
-Wextra-semi-stmt warning enabled
Project: Autoconf
Submitted by: haible
Submitted on: Sat 12 Dec 2020 02:58:29 AM CET
Category: None
Priority: 5 - Normal
Severity: 3 - Normal
Status: None
Privacy: Public
Assigned to: None
Originator Email:
Open/Closed: Open
Discussion Lock: Any
Operating System: None
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Details:
This worked with autoconf 2.69 generated configure files; with autoconf 2.70
generated configure files the configuration aborts like this:
checking how clang -Wextra-semi-stmt reports undeclared, standard C
functions... configure: error: in `/testdir1/build-64':
configure: error: cannot detect from compiler exit status or warnings
See `config.log' for more details
This can be reproduced:
a) on a Unix system, with CC="clang -Wall -Wextra-semi-stmt",
b) on a Windows system, with CC="$HOME/compile clang-cl -Wall".
(Apparently 'clang-cl' enables some more warnings on Windows, than 'clang' on
Unix. Probably for MSVC compatibility.)
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