[FS#4073] make kernel_menuconfig fails at m4 1.4.18 in Ubuntu 21.10 because of SIGSTKSZ (Attachment added)

[OpenWrt Bugs]

THIS IS AN AUTOMATED MESSAGE, DO NOT REPLY.

A new Flyspray task has been opened.  Details are below. 

User who did this - Boris Gjenero (dreamlayers) 

Attached to Project - OpenWrt/LEDE Project
Summary - make kernel_menuconfig fails at m4 1.4.18 in Ubuntu 21.10 because of SIGSTKSZ
Task Type - Build Failure
Category - Toolchain
Status - Unconfirmed
Assigned To - 
Operating System - All
Severity - Medium
Priority - Very Low
Reported Version - openwrt-21.02
Due in Version - Undecided
Due Date - Undecided
Details - I'm attempting to build openwrt 21.02 from git for a Buffalo WZR-600DHP on x86_64 Ubuntu 21.10. make kernel_menuconfig failed, and after running it with increased verbosity I see:

    gcc  -I.   -I/home/bgjenero/gitapps/openwrt/staging_dir/host/include   -O2 -I/home/bgjenero/gitapps/openwrt/staging_dir/host/include  -MT c-stack.o -MD -MP -MF $depbase.Tpo -c -o c-stack.o c-stack.c &&\
    mv -f $depbase.Tpo $depbase.Po
    In file included from /usr/include/signal.h:328,
                     from ./signal.h:52,
                     from c-stack.c:49:
    c-stack.c:55:26: error: missing binary operator before token "("
       55 | #elif HAVE_LIBSIGSEGV && SIGSTKSZ < 16384
          |                          ^~~~~~~~

That's a failure building m4 1.4.18. It is discussed at https://lists.gnu.org/archive/html/bug-m4/2021-03/msg00000.html

The problem is that m4 is expecting SIGSTKSZ to be a compile time constant, but instead in 
/usr/include/x86_64-linux-gnu/bits/sigstksz.h it is: # define SIGSTKSZ sysconf (_SC_SIGSTKSZ)

The m4 package in Ubuntu 21.10 is actually the same version, and the source package has a patch for this in https://launchpad.net/ubuntu/+archive/primary/+sourcefiles/m4/1.4.18-5ubuntu1/m4_1.4.18-5ubuntu1.debian.tar.xz at /debian/patches/04-fix-sigstksz.patch. I am attaching that patch here.

One or more files have been attached.

More information can be found at the following URL:
https://bugs.openwrt.org/index.php?do=details&task_id=4073

You are receiving this message because you have requested it from the Flyspray bugtracking system.  If you did not expect this message or don't want to receive mails in future, you can change your notification settings at the URL shown above.