We use build macros such as AX_CHECK_LINK_FLAG, that require >=2.64, so our configure should also require Autoconf >= 2.64. The build would already blow up if 2.64 wasn't available. i.e:
configure.ac:320: error: Autoconf version 2.64 or higher is required
build-aux/m4/ax_check_link_flag.m4:74: AX_CHECK_LINK_FLAG is expanded from...
For reference, Autoconf 2.69 was released in April of 2012.
See the Autoconf Versioning docs for more info on AC_PREREQ.
ACK b16df46a88bc09623899320f121ed89f65fdf376, I have reviewed the code and it looks OK, I agree it can be merged.
One of the most conservative distro CentOS 7 has autoconf 2.69. Interesting, which supported distros use autoconf 2.64?
ACK b16df46a88bc09623899320f121ed89f65fdf376
ACK 4f4ae6f97e210fa0a2aa274bcd2a77a226fe6a7e
Concept ACK, I'm also ok with bumping it to 2.69
We use build macros such as AX_CHECK_LINK_FLAG, that require >=2.64, so
our configure should also require Autoconf >= 2.64. The build would
already blow up if 2.64 wasn't available. i.e:
configure.ac:320: error: Autoconf version 2.64 or higher is required
build-aux/m4/ax_check_link_flag.m4:74: AX_CHECK_LINK_FLAG is expanded from...
For reference, Autoconf 2.69 was released in April of 2012.
https://lists.gnu.org/archive/html/autoconf/2012-04/msg00041.html
See https://www.gnu.org/software/autoconf/manual/autoconf-2.69/html_node/Versioning.html
for more info on AC_PREREQ.
Concept ACK, I'm also ok with bumping it to 2.69
Updated to 2.69. Availability of 2.69 is extensive across all the operating systems we support.
re-ACK 4f4ae6f97e210fa0a2aa274bcd2a77a226fe6a7e, Autoconf 2.69 seems wide available.