With glibc 2.27
sudo emerge kbuild
r.o fts.o setmode.o strmode.o strlcpy.o osdep.o kbuild_protection.o kbuild_version.o glob/libglob.a
chmod.o: In function `kmk_builtin_chmod':
chmod.c:(.text+0x195): warning: lchmod is not implemented and will always fail
glob/libglob.a(glob.o): In function `glob':
glob.c:(.text+0x3c7): undefined reference to `__alloca'
glob.c:(.text+0x571): undefined reference to `__alloca'
glob.c:(.text+0x5f9): undefined reference to `__alloca'
glob.c:(.text+0x7be): undefined reference to `__alloca'
glob/libglob.a(glob.o): In function `glob_in_dir':
glob.c:(.text+0x121d): undefined reference to `__alloca'
glob/libglob.a(glob.o):glob.c:(.text+0x1376): more undefined references to `__alloca' follow
Comment 1 by bugdroid1@chromium.org
, Jun 17 2018