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Re: [bug #60798] Make does not compile with GCC 11.1.0

From: Edward Welbourne
Subject: Re: [bug #60798] Make does not compile with GCC 11.1.0
Date: Fri, 3 Dec 2021 12:26:36 +0000

Jouke Witteveen (3 December 2021 13:22) wrote:
> The next warning I get (GCC11) is a _return-local-addr_ warning in
> src/read.c:2534 (find_percent_cached). Maybe GCC doesn't recognize alloca as a
> heap allocation? Just guessing; this warning was not obvious to me.

alloca() is not a heap allocation:
<quote src="man alloca">

       The  alloca() function allocates size bytes of space in the stack frame
       of the caller.  This temporary space is automatically  freed  when  the
       function that called alloca() returns to its caller.

It is a stack allocation.  So if make is returning an alloca()'d buffer,
then that is indeed a return of a local address.


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