URL:
<https://savannah.gnu.org/support/?110425>
Summary: autoconf 2.70 generated configure file does not
enable -std=gnu99 on Mac OS X 10.5
Project: Autoconf
Submitted by: haible
Submitted on: Sat 16 Jan 2021 11:49:59 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: Mac OS
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Details:
This is a regression in autoconf 2.70, compared to version 2.69:
Take a tarball with C source code that makes use of C99 features. For
example:
./gnulib-tool --create-testdir --dir=../testdir5 --single-configure dfa
(with current gnulib).
Build it on Mac OS X 10.5, with CC="gcc -m64".
With autoconf 2.69, the config.status file contains
S["CC"]="gcc -m64 -std=gnu99"
and the compilation goes through.
With autoconf 2.70, the config.status file contains
S["CC"]="gcc -m64"
and the compilation fails with errors such as "error: 'for' loop initial
declaration used outside C99 mode".
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