gnulib m4/threadlib.m4 bug crashing package tests

[Ken Brown]

On 11/25/2021 1:25 PM, Yaakov Selkowitz via Cygwin-apps wrote:
> Add gl_cv_have_weak=no to cygconf?

Are you suggesting maintainers should do this, or are you talking about patching 
cygport, like this:

diff --git a/cygclass/autotools.cygclass b/cygclass/autotools.cygclass
index 712f437..8b6fdde 100644
--- a/cygclass/autotools.cygclass
+++ b/cygclass/autotools.cygclass
@@ -735,6 +735,14 @@ cygconf() {
                 export ac_cv_func_mmap_fixed_mapped=yes ;;
         esac

+       # Some versions of gnulib's threadlib.m4:gl_WEAK_SYMBOLS
+       # incorrectly report that Cygwin supports weak symbols.  See
+       # https://cygwin.com/pipermail/cygwin-apps/2021-September/041587.html.
+       case ${CHOST} in
+       *-*-cygwin*)
+               export gl_cv_have_weak=no ;;
+       esac
+
         # packages that use intltool w/o glib-gettext get this wrong
         export DATADIRNAME="share"

Ken