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Re: [PATCH] warnings: fix compilation with old autoconf
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From: |
Eric Blake |
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Subject: |
Re: [PATCH] warnings: fix compilation with old autoconf |
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Date: |
Mon, 28 Aug 2017 08:41:29 -0500 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.3.0 |
On 08/27/2017 12:50 PM, Bruno Haible wrote:
>> Therefore, the difference between the two macros is based solely on the
>> fact that tracing depends on which macro name is invoked.
>
> Well, then the Autoconf documentation at
> https://www.gnu.org/savannah-checkouts/gnu/autoconf/manual/autoconf-2.69/html_node/Macro-Definitions.html
> is wrong. It states that the major difference between AC_DEFUN and m4_defun
No, you quoted it wrong. That sentence is describing the difference
between AC_DEFUN and m4_define (not m4_defun). m4_define is low-level
(create a definition, but no hooks for ordering); m4_defun is
higher-level (create a definition AND include hooks for ordering
constraints in that definition).
--
Eric Blake, Principal Software Engineer
Red Hat, Inc. +1-919-301-3266
Virtualization: qemu.org | libvirt.org
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