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Re: max_align_t from libgnu/stddef.h conflicts with gcc 5.3.1

From: Ángel González
Subject: Re: max_align_t from libgnu/stddef.h conflicts with gcc 5.3.1
Date: Fri, 01 Apr 2016 19:40:02 +0200
User-agent: Thunderbird

On 01/04/16 11:30, Peter Simons wrote:
Apparently, the second (failing) build decides that max_align_t is not
available, but the gnulib-generate test build thinks it is. Not sure how
to explain that.

For what it's worth, the full source code of my project is available at

Best regards,

The problem is «gcc vs g++»

gnulib is running the test against g++, and it doesn't define max_align_t,
so it is right in that a replacement is needed there.

The compilation error is on libgnu/unistd.c, a C program compiled by gcc.
gcc doesn't need the replacement header (provides max_align_t itself), and
thus the double-definition appears.

I'm not sure _how_ is this supposed to be configured. mini-httpd is a C++ project, it's gnulib the one introducing a dummy unistd.c file. Maybe using .cpp extensions on the
libraries would be appropiate.

For this specific issue, another solution would be to add a #ifndef _GCC_MAX_ALIGN_T
guard to the replacement unistd.h.
Although the latter doesn't fix the underlying problem.

Best regards

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