Thanks! That's basically what I tested by hand on CheriBSD. -- Brooks On Fri, Dec 15, 2023 at 06:24:05PM -0800, Paul Eggert wrote: > Thanks for the diagnosis. Proposed patch attached. I haven't installed it on > Savannah, as Autoconf is currently in a prerelease freeze and Zack wants a > look-see at all patches before they go in. > From 0845c59400378f3441686cbcde48b49fce638f97 Mon Sep 17 00:00:00 2001 > From: Paul Eggert <eggert@xxxxxxxxxxx> > Date: Fri, 15 Dec 2023 18:21:39 -0800 > Subject: [PATCH] Fix AC_FUNC_MMAP on CheriBSD > MIME-Version: 1.0 > Content-Type: text/plain; charset=UTF-8 > Content-Transfer-Encoding: 8bit > > Problem reported by Brooks Davis in: > https://lists.gnu.org/r/autoconf/2023-12/msg00022.html > * lib/autoconf/functions.m4: Don???t unmap, since we > want to test remapping something already mapped, > and unmapping breaks on CheriBSD. > --- > lib/autoconf/functions.m4 | 3 +-- > 1 file changed, 1 insertion(+), 2 deletions(-) > > diff --git a/lib/autoconf/functions.m4 b/lib/autoconf/functions.m4 > index 4cfb5142..9b3f3c02 100644 > --- a/lib/autoconf/functions.m4 > +++ b/lib/autoconf/functions.m4 > @@ -1385,8 +1385,7 @@ main (void) > if (*(data2 + i)) > return 7; > close (fd2); > - if (munmap (data2, pagesize)) > - return 8; > + /* 'return 8;' not currently used. */ > > /* Next, try to mmap the file at a fixed address which already has > something else allocated at it. If we can, also make sure that > -- > 2.43.0 >
