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Re: m4 1.4.18 fails immediately when run on Mac

From: Eric Blake
Subject: Re: m4 1.4.18 fails immediately when run on Mac
Date: Fri, 22 Nov 2019 13:11:28 -0600
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.1.1

On 11/22/19 12:59 PM, Vanessa McHale wrote:
Hi all,

When I try to run m4 on my Mac, it immediately fails with

Abort trap: 6

Can you get a backtrace of where the abort() call is happening? I don't have access to a Mac, so I am not in a position to easily reproduce the failure.

I built using the traditional ./configure ; make -j8 and then run it with


Since you are building from source, you may also want to try modifying main() to not install a signal handler for SIGABRT; that way, the desired abort message will get printed rather than m4's normal attempt to sanitize a fatal error into a more friendly message.

This is the result of gcc --version:

Configured with: --prefix=/Library/Developer/CommandLineTools/usr 
Apple clang version 11.0.0 (clang-1100.0.33.12)
Target: x86_64-apple-darwin19.0.0
Thread model: posix
InstalledDir: /Library/Developer/CommandLineTools/usr/bin

Vanessa McHale

Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3226
Virtualization:  qemu.org | libvirt.org

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