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Re: Is it safe to use ax_gcc_builtin to detect __builtin_offsetof?
From: |
Peter Hull |
Subject: |
Re: Is it safe to use ax_gcc_builtin to detect __builtin_offsetof? |
Date: |
Sun, 25 Feb 2024 10:32:18 +0000 |
On Sun, 25 Feb 2024 at 07:29, Jeffrey Walton <noloader@gmail.com> wrote:
>
> Cancel. We can't use AX_GCC_BUILTIN in production. Using
> AX_GCC_BUILTIN produces broken configure's:
That's weird it didn't work. I tried with this minimal file (autoconf
2.71) and it was fine:
# -*- Autoconf -*-
# Process this file with autoconf to produce a configure script.
AC_PREREQ([2.71])
AC_INIT([FULL-PACKAGE-NAME], [VERSION], [BUG-REPORT-ADDRESS])
AC_CONFIG_SRCDIR([me.c])
AC_CONFIG_HEADERS([config.h])
# Checks for programs.
AC_PROG_CC
# Checks for libraries.
# Checks for header files.
# Checks for typedefs, structures, and compiler characteristics.
AX_GCC_BUILTIN([__builtin_bswap16])
AX_GCC_BUILTIN([__builtin_offsetof])
# Checks for library functions.
AC_OUTPUT
I had to put the ax_gcc_builtin.m4 file in m4/ and run aclocal, did
you also do this?
Peter