Merge branch 'relibc' into 'relibc'

Bash: Needed patches for relibc

See merge request redox-os/cookbook!175

recipes/bash/03-autotools-relibc-stuff.patch

@@ -0,0 +1,73 @@
+--- a/aclocal.m4	2015-12-02 15:22:19.000000000 +0100
++++ b/aclocal.m4	2018-08-03 17:26:40.798221239 +0200
+@@ -576,49 +576,7 @@
+ fi
+ ])
+ 
+-AC_DEFUN(BASH_FUNC_GETENV,
+-[AC_MSG_CHECKING(to see if getenv can be redefined)
+-AC_CACHE_VAL(bash_cv_getenv_redef,
+-[AC_TRY_RUN([
+-#ifdef HAVE_UNISTD_H
+-#  include <unistd.h>
+-#endif
+-#ifndef __STDC__
+-#  ifndef const
+-#    define const
+-#  endif
+-#endif
+-char *
+-getenv (name)
+-#if defined (__linux__) || defined (__bsdi__) || defined (convex)
+-     const char *name;
+-#else
+-     char const *name;
+-#endif /* !__linux__ && !__bsdi__ && !convex */
+-{
+-return "42";
+-}
+-main()
+-{
+-char *s;
+-/* The next allows this program to run, but does not allow bash to link
+-   when it redefines getenv.  I'm not really interested in figuring out
+-   why not. */
+-#if defined (NeXT)
+-exit(1);
+-#endif
+-s = getenv("ABCDE");
+-exit(s == 0);	/* force optimizer to leave getenv in */
+-}
+-], bash_cv_getenv_redef=yes, bash_cv_getenv_redef=no,
+-   [AC_MSG_WARN(cannot check getenv redefinition if cross compiling -- defaulting to yes)
+-    bash_cv_getenv_redef=yes]
+-)])
+-AC_MSG_RESULT($bash_cv_getenv_redef)
+-if test $bash_cv_getenv_redef = yes; then
+-AC_DEFINE(CAN_REDEFINE_GETENV)
+-fi
+-])
++bash_cv_getenv_redef=no
+ 
+ # We should check for putenv before calling this
+ AC_DEFUN(BASH_FUNC_STD_PUTENV,
+@@ -1200,7 +1158,7 @@
+   AC_TRY_LINK([#include <signal.h>],[
+     sigset_t ss;
+     struct sigaction sa;
+-    sigemptyset(&ss); sigsuspend(&ss);
++    sigemptyset(&ss); /* sigsuspend(&ss); */
+     sigaction(SIGINT, &sa, (struct sigaction *) 0);
+     sigprocmask(SIG_BLOCK, &ss, (sigset_t *) 0);
+   ], bash_cv_signal_vintage=posix,
+--- a/configure.ac	2016-09-07 22:56:28.000000000 +0200
++++ b/configure.ac	2018-08-03 09:10:42.818015670 +0200
+@@ -52,7 +52,7 @@
+ AC_CANONICAL_BUILD
+ 
+ dnl configure defaults
+-opt_bash_malloc=yes
++opt_bash_malloc=no
+ opt_afs=no
+ opt_curses=no
+ opt_with_installed_readline=no