Fix undefined behaviour. * lib/bitrotate.h (rotl16, rotr16, rotl8, rotr8): Case x to 'unsigned int', to avoid shift operations on 'int'. * lib/xmemdup0.c (xmemdup0): Don't invoke memcpy with a zero size. * tests/test-count-leading-zeros.c (main): Use a random number that has as many bits as TYPE, not only 2*15 or 2*31 bits. * tests/test-count-trailing-zeros.c (main): Likewise. * tests/test-count-one-bits.c (main): Likewise. * tests/test-memmem.c: Don't include "null-ptr.h". (main): Use zerosize_ptr() instead of null_ptr(). * modules/memmem-tests (Files): Remove tests/null-ptr.h.

Description:
Stack overflow handling, causing program exit.

Files:
lib/c-stack.h
lib/c-stack.c
m4/c-stack.m4

Depends-on:
gettext-h
errno
exitfail
ignore-value
unistd
raise
sigaction
libsigsegv
getprogname

configure.ac:
gl_C_STACK

Makefile.am:
lib_SOURCES += c-stack.h c-stack.c

Include:
"c-stack.h"

Link:
$(LTLIBCSTACK) when linking with libtool, $(LIBCSTACK) otherwise
$(LTLIBINTL) when linking with libtool, $(LIBINTL) otherwise

License:
GPL

Maintainer:
Paul Eggert