Add 'nixpkgs/' from commit '2436c27541b2f52deea3a4c1691216a02152e729'

git-subtree-dir: nixpkgs
git-subtree-mainline: 1148b1d122bc03e9a3665856c9b7bb96bd4e3994
git-subtree-split: 2436c27541b2f52deea3a4c1691216a02152e729

1 files changed, 607 insertions, 0 deletions

diff --git a/nixpkgs/pkgs/shells/bash/cygwin-bash-4.4.11-2.src.patch b/nixpkgs/pkgs/shells/bash/cygwin-bash-4.4.11-2.src.patch
new file mode 100644
index 00000000000..48837310962
--- /dev/null
+++ b/nixpkgs/pkgs/shells/bash/cygwin-bash-4.4.11-2.src.patch
@@ -0,0 +1,607 @@
+--- bashline.c	2017-01-23 13:28:06.955247200 -0600
++++ bashline.c	2017-01-23 13:55:07.992877600 -0600
+@@ -76,6 +76,16 @@
+ #  include "pcomplete.h"
+ #endif
+ 
++#if __CYGWIN__
++#  ifdef __x86_64__
++#    define IMP(x) __imp_##x
++#  else
++#    define IMP(x) _imp__##x
++#  endif
++#else
++#  define IMP(x) x
++#endif
++
+ /* These should agree with the defines for emacs_mode and vi_mode in
+    rldefs.h, even though that's not a public readline header file. */
+ #ifndef EMACS_EDITING_MODE
+@@ -271,6 +281,11 @@ int no_empty_command_completion;
+    are the only possible matches, even if FIGNORE says to. */
+ int force_fignore = 1;
+ 
++#if __CYGWIN__
++/* If set, shorten "foo.exe" to "foo" when they are the same file.  */
++int completion_strip_exe;
++#endif /* __CYGWIN__ */
++
+ /* Perform spelling correction on directory names during word completion */
+ int dircomplete_spelling = 0;
+ 
+@@ -498,11 +513,12 @@ initialize_readline ()
+   kseq[0] = CTRL('J');
+   kseq[1] = '\0';
+   func = rl_function_of_keyseq (kseq, emacs_meta_keymap, (int *)NULL);
+-  if (func == rl_vi_editing_mode)
++  extern rl_command_func_t *IMP(rl_vi_editing_mode);
++  if (func == rl_vi_editing_mode || func == IMP(rl_vi_editing_mode))
+     rl_unbind_key_in_map (CTRL('J'), emacs_meta_keymap);
+   kseq[0] = CTRL('M');
+   func = rl_function_of_keyseq (kseq, emacs_meta_keymap, (int *)NULL);
+-  if (func == rl_vi_editing_mode)
++  if (func == rl_vi_editing_mode || func == IMP(rl_vi_editing_mode))
+     rl_unbind_key_in_map (CTRL('M'), emacs_meta_keymap);
+ #if defined (VI_MODE)
+   rl_unbind_key_in_map (CTRL('E'), vi_movement_keymap);
+@@ -521,7 +537,8 @@ initialize_readline ()
+   kseq[0] = '~';
+   kseq[1] = '\0';
+   func = rl_function_of_keyseq (kseq, emacs_meta_keymap, (int *)NULL);
+-  if (func == 0 || func == rl_tilde_expand)
++  extern rl_command_func_t *IMP(rl_tilde_expand);
++  if (func == 0 || func == rl_tilde_expand || func == IMP(rl_tilde_expand))
+     rl_bind_keyseq_in_map (kseq, bash_complete_username, emacs_meta_keymap);
+ 
+   rl_bind_key_if_unbound_in_map ('~', bash_possible_username_completions, emacs_ctlx_keymap);
+@@ -544,7 +561,8 @@ initialize_readline ()
+   kseq[0] = TAB;
+   kseq[1] = '\0';
+   func = rl_function_of_keyseq (kseq, emacs_meta_keymap, (int *)NULL);
+-  if (func == 0 || func == rl_tab_insert)
++  extern rl_command_func_t *IMP(rl_tab_insert);
++  if (func == 0 || func == rl_tab_insert || func == IMP(rl_tab_insert))
+     rl_bind_key_in_map (TAB, dynamic_complete_history, emacs_meta_keymap);
+ 
+   /* Tell the completer that we want a crack first. */
+@@ -2194,6 +2212,21 @@ globword:
+ 
+       if (match && executable_completion ((searching_path ? val : cval), searching_path))
+ 	{
++#if __CYGWIN__
++	  if (completion_strip_exe)
++	    {
++	      size_t val_len = strlen (val);
++	      char *candidate;
++	      if (val_len > 4 && !strcasecmp (&val[val_len - 4], ".exe")
++		  && (candidate = strdup (val)))
++		{
++		  candidate[val_len - 4] = '\0';
++		  if (same_file (val, candidate, NULL, NULL))
++		    temp[strlen (temp) - 4] = '\0';
++		  free (candidate);
++		}
++	    }
++#endif
+ 	  if (cval != val)
+ 	    free (cval);
+ 	  free (val);
+@@ -2929,6 +2962,17 @@ test_for_directory (name)
+   int r;
+ 
+   fn = bash_tilde_expand (name, 0);
++#if __CYGWIN
++  /* stat("//server") can only be successful as a directory, but can take
++     seconds to time out on failure.  It is much faster to assume that
++     "//server" is a valid name than it is to wait for a stat, even if it
++     gives false positives on bad names.  */
++  if (fn[0] == '/' && fn[1] == '/' && ! strchr (&fn[2], '/'))
++    {
++      free (fn);
++      return 1;
++    }
++#endif
+   r = file_isdir (fn);
+   free (fn);
+ 
+--- builtins/read.def	2017-01-23 13:28:07.017686500 -0600
++++ builtins/read.def	2017-01-23 13:55:07.992877600 -0600
+@@ -85,7 +85,6 @@ $END
+ 
+ #ifdef __CYGWIN__
+ #  include <fcntl.h>
+-#  include <io.h>
+ #endif
+ 
+ #include "../bashintl.h"
+@@ -530,10 +529,6 @@ read_builtin (list)
+       fflush (stderr);
+     }
+ 
+-#if defined (__CYGWIN__) && defined (O_TEXT)
+-  setmode (0, O_TEXT);
+-#endif
+-
+   ps2 = 0;
+   for (print_ps2 = eof = retval = 0;;)
+     {
+@@ -664,6 +659,14 @@ read_builtin (list)
+       if (c == '\0' && delim != '\0')
+ 	continue;		/* skip NUL bytes in input */
+ 
++#ifdef __CYGWIN__
++      {
++        extern igncr;
++	if (igncr && c == '\r' && delim != '\r')
++	  continue; /* skip carriage return */
++      }
++#endif
++
+       if ((skip_ctlesc == 0 && c == CTLESC) || (skip_ctlnul == 0 && c == CTLNUL))
+ 	{
+ 	  saw_escape++;
+--- builtins/set.def	2016-06-02 19:10:10.000000000 -0500
++++ builtins/set.def	2017-01-23 13:55:07.992877600 -0600
+@@ -56,6 +56,13 @@ extern int dont_save_function_defs;
+ #if defined (READLINE)
+ extern int no_line_editing;
+ #endif /* READLINE */
++#ifdef __CYGWIN__
++extern int igncr;
++static int set_minus_o_option_maybe (int, const char *, int);
++#  define INTERACTIVE_ONLY ,1
++#else
++#  define INTERACTIVE_ONLY
++#endif
+ 
+ $BUILTIN set
+ $FUNCTION set_builtin
+@@ -92,6 +99,9 @@ Options:
+ #if defined (HISTORY)
+           history      enable command history
+ #endif
++#ifdef __CYGWIN__
++          igncr        on Cygwin, ignore \r in line endings
++#endif
+           ignoreeof    the shell will not exit upon reading EOF
+           interactive-comments
+                        allow comments to appear in interactive commands
+@@ -192,29 +202,39 @@ const struct {
+   int *variable;
+   setopt_set_func_t *set_func;
+   setopt_get_func_t *get_func;
++#ifdef __CYGWIN__
++  /* Cygwin users have taken to exporting SHELLOPTS for the cygwin-specific
++     igncr. As a result, we want to ensure SHELLOPTS parsing does not turn
++     on interactive options when exported from an interactive shell, but
++     parse in a non-interactive setting, so as not to break POSIX /bin/sh */
++  int interactive_only;
++#endif
+ } o_options[] = {
+   { "allexport",  'a', (int *)NULL, (setopt_set_func_t *)NULL, (setopt_get_func_t *)NULL },
+ #if defined (BRACE_EXPANSION)
+   { "braceexpand",'B', (int *)NULL, (setopt_set_func_t *)NULL, (setopt_get_func_t *)NULL  },
+ #endif
+ #if defined (READLINE)
+-  { "emacs",     '\0', (int *)NULL, set_edit_mode, get_edit_mode },
++  { "emacs",     '\0', (int *)NULL, set_edit_mode, get_edit_mode INTERACTIVE_ONLY },
+ #endif
+   { "errexit",	  'e', (int *)NULL, (setopt_set_func_t *)NULL, (setopt_get_func_t *)NULL  },
+   { "errtrace",	  'E', (int *)NULL, (setopt_set_func_t *)NULL, (setopt_get_func_t *)NULL  },
+   { "functrace",  'T', (int *)NULL, (setopt_set_func_t *)NULL, (setopt_get_func_t *)NULL  },
+   { "hashall",    'h', (int *)NULL, (setopt_set_func_t *)NULL, (setopt_get_func_t *)NULL  },
+ #if defined (BANG_HISTORY)
+-  { "histexpand", 'H', (int *)NULL, (setopt_set_func_t *)NULL, (setopt_get_func_t *)NULL  },
++  { "histexpand", 'H', (int *)NULL, (setopt_set_func_t *)NULL, (setopt_get_func_t *)NULL INTERACTIVE_ONLY },
+ #endif /* BANG_HISTORY */
+ #if defined (HISTORY)
+-  { "history",   '\0', &enable_history_list, bash_set_history, (setopt_get_func_t *)NULL },
++  { "history",   '\0', &enable_history_list, bash_set_history, (setopt_get_func_t *)NULL INTERACTIVE_ONLY },
++#endif
++#ifdef __CYGWIN__
++  { "igncr", '\0', &igncr, NULL, (setopt_get_func_t *)NULL },
+ #endif
+   { "ignoreeof", '\0', &ignoreeof, set_ignoreeof, (setopt_get_func_t *)NULL },
+   { "interactive-comments", '\0', &interactive_comments, (setopt_set_func_t *)NULL, (setopt_get_func_t *)NULL },
+   { "keyword",    'k', (int *)NULL, (setopt_set_func_t *)NULL, (setopt_get_func_t *)NULL  },
+ #if defined (JOB_CONTROL)
+-  { "monitor",	  'm', (int *)NULL, (setopt_set_func_t *)NULL, (setopt_get_func_t *)NULL  },
++  { "monitor",	  'm', (int *)NULL, (setopt_set_func_t *)NULL, (setopt_get_func_t *)NULL INTERACTIVE_ONLY },
+ #endif
+   { "noclobber",  'C', (int *)NULL, (setopt_set_func_t *)NULL, (setopt_get_func_t *)NULL  },
+   { "noexec",	  'n', (int *)NULL, (setopt_set_func_t *)NULL, (setopt_get_func_t *)NULL  },
+@@ -233,7 +253,7 @@ const struct {
+   { "privileged", 'p', (int *)NULL, (setopt_set_func_t *)NULL, (setopt_get_func_t *)NULL  },
+   { "verbose",	  'v', (int *)NULL, (setopt_set_func_t *)NULL, (setopt_get_func_t *)NULL  },
+ #if defined (READLINE)
+-  { "vi",        '\0', (int *)NULL, set_edit_mode, get_edit_mode },
++  { "vi",        '\0', (int *)NULL, set_edit_mode, get_edit_mode INTERACTIVE_ONLY },
+ #endif
+   { "xtrace",	  'x', (int *)NULL, (setopt_set_func_t *)NULL, (setopt_get_func_t *)NULL  },
+   {(char *)NULL, 0 , (int *)NULL, (setopt_set_func_t *)NULL, (setopt_get_func_t *)NULL },
+@@ -455,6 +475,15 @@ int
+ set_minus_o_option (on_or_off, option_name)
+      int on_or_off;
+      char *option_name;
++#ifdef __CYGWIN__
++{
++  /* See Cygwin comments above. */
++  return set_minus_o_option_maybe (on_or_off, option_name, 0);
++}
++static int
++set_minus_o_option_maybe (int on_or_off, const char *option_name,
++                          int avoid_interactive)
++#endif /* __CYGWIN__ */
+ {
+   register int i;
+ 
+@@ -462,6 +491,10 @@ set_minus_o_option (on_or_off, option_na
+     {
+       if (STREQ (option_name, o_options[i].name))
+ 	{
++#ifdef __CYGWIN__
++	  if (o_options[i].interactive_only && avoid_interactive)
++	    return EXECUTION_SUCCESS;
++#endif
+ 	  if (o_options[i].letter == 0)
+ 	    {
+ 	      previous_option_value = GET_BINARY_O_OPTION_VALUE (i, o_options[i].name);
+@@ -588,7 +621,11 @@ parse_shellopts (value)
+   vptr = 0;
+   while (vname = extract_colon_unit (value, &vptr))
+     {
++#ifdef __CYGWIN__
++      set_minus_o_option_maybe (FLAG_ON, vname, !interactive_shell);
++#else
+       set_minus_o_option (FLAG_ON, vname);
++#endif
+       free (vname);
+     }
+ }
+--- builtins/shopt.def	2016-05-06 14:00:02.000000000 -0500
++++ builtins/shopt.def	2017-01-23 13:55:07.992877600 -0600
+@@ -92,6 +92,10 @@ extern int glob_asciirange;
+ extern int lastpipe_opt;
+ extern int inherit_errexit;
+ 
++#ifdef __CYGWIN__
++extern int completion_strip_exe;
++#endif
++
+ #if defined (EXTENDED_GLOB)
+ extern int extended_glob;
+ #endif
+@@ -169,6 +173,9 @@ static struct {
+   { "compat41", &shopt_compat41, set_compatibility_level },
+   { "compat42", &shopt_compat42, set_compatibility_level },
+   { "compat43", &shopt_compat43, set_compatibility_level },
++#ifdef __CYGWIN__
++  { "completion_strip_exe", &completion_strip_exe, NULL },
++#endif
+ #if defined (READLINE)
+   { "complete_fullquote", &complete_fullquote, (shopt_set_func_t *)NULL},
+   { "direxpand", &dircomplete_expand, shopt_set_complete_direxpand },
+--- config-top.h	2016-05-19 13:34:02.000000000 -0500
++++ config-top.h	2017-01-23 13:55:07.992877600 -0600
+@@ -87,10 +87,10 @@
+ #define DEFAULT_BASHRC "~/.bashrc"
+ 
+ /* System-wide .bashrc file for interactive shells. */
+-/* #define SYS_BASHRC "/etc/bash.bashrc" */
++#define SYS_BASHRC "/etc/bash.bashrc"
+ 
+ /* System-wide .bash_logout for login shells. */
+-/* #define SYS_BASH_LOGOUT "/etc/bash.bash_logout" */
++#define SYS_BASH_LOGOUT "/etc/bash.bash_logout"
+ 
+ /* Define this to make non-interactive shells begun with argv[0][0] == '-'
+    run the startup files when not in posix mode. */
+@@ -100,7 +100,7 @@
+    sshd and source the .bashrc if so (like the rshd behavior).  This checks
+    for the presence of SSH_CLIENT or SSH2_CLIENT in the initial environment,
+    which can be fooled under certain not-uncommon circumstances. */
+-/* #define SSH_SOURCE_BASHRC */
++#define SSH_SOURCE_BASHRC
+ 
+ /* Define if you want the case-capitalizing operators (~[~]) and the
+    `capcase' variable attribute (declare -c). */
+--- doc/Makefile.in	2015-12-06 18:55:56.000000000 -0600
++++ doc/Makefile.in	2017-01-23 13:55:07.992877600 -0600
+@@ -189,7 +189,7 @@ bashref.html: $(BASHREF_FILES) $(HSUSER)
+ 	$(MAKEINFO) --html --no-split -I$(TEXINPUTDIR) $(srcdir)/bashref.texi
+ 
+ bash.info: bashref.info
+-	${SHELL} ${INFOPOST} < $(srcdir)/bashref.info > $@ ; \
++	${SHELL} ${INFOPOST} < bashref.info > $@ ; \
+ 
+ bash.txt: bash.1
+ bash.ps: bash.1
+@@ -252,9 +252,9 @@ install: info installdirs
+ 	-$(INSTALL_DATA) $(srcdir)/bashbug.1 $(DESTDIR)$(man1dir)/bashbug${man1ext}
+ 	-$(INSTALL_DATA) $(OTHER_DOCS) $(DESTDIR)$(docdir)
+ # uncomment the next lines to install the builtins man page
+-#	sed 's:bash\.1:man1/&:' $(srcdir)/builtins.1 > $${TMPDIR:-/var/tmp}/builtins.1
+-#	-$(INSTALL_DATA) $${TMPDIR:-/var/tmp}/builtins.1 $(DESTDIR)$(man1dir)/bash_builtins${man1ext}
+-#	-$(RM) $${TMPDIR:-/var/tmp}/builtins.1
++	sed 's:bash\.1:man1/&:' $(srcdir)/builtins.1 > $${TMPDIR:-/var/tmp}/builtins.1
++	-$(INSTALL_DATA) $${TMPDIR:-/var/tmp}/builtins.1 $(DESTDIR)$(man1dir)/bash_builtins${man1ext}
++	-$(RM) $${TMPDIR:-/var/tmp}/builtins.1
+ 	-if test -f bash.info; then d=.; else d=$(srcdir); fi; \
+ 	  $(INSTALL_DATA) $$d/bash.info $(DESTDIR)$(infodir)/bash.info
+ # run install-info if it is present to update the info directory
+--- doc/bash.1	2016-08-26 08:45:17.000000000 -0500
++++ doc/bash.1	2017-01-23 13:55:08.008447700 -0600
+@@ -9607,6 +9607,10 @@ filenames.
+ This variable is set by default, which is the default bash behavior in
+ versions through 4.2.
+ .TP 8
++.B completion_strip_exe
++If set, whenever bash sees \fIfoo.exe\fP during completion, it checks if
++\fIfoo\fP is the same file and strips the suffix.
++.TP 8
+ .B direxpand
+ If set,
+ .B bash
+--- doc/bashref.texi	2016-09-07 16:13:36.000000000 -0500
++++ doc/bashref.texi	2017-01-23 13:55:08.008447700 -0600
+@@ -5123,6 +5123,10 @@ filenames.
+ This variable is set by default, which is the default Bash behavior in
+ versions through 4.2.
+ 
++@item completion_strip_exe
++If set, whenever bash sees @file{foo.exe} during completion, it checks if
++@file{foo} is the same file and strips the suffix.
++
+ @item direxpand
+ If set, Bash
+ replaces directory names with the results of word expansion when performing
+--- doc/builtins.1	2012-02-21 13:32:05.000000000 -0600
++++ doc/builtins.1	2017-01-23 13:55:08.008447700 -0600
+@@ -19,6 +19,6 @@ shift, shopt, source, suspend, test, tim
+ ulimit, umask, unalias, unset, wait \- bash built-in commands, see \fBbash\fR(1)
+ .SH BASH BUILTIN COMMANDS
+ .nr zZ 1
+-.so bash.1
++.so man1/bash.1
+ .SH SEE ALSO
+ bash(1), sh(1)
+--- general.c	2016-08-11 10:16:56.000000000 -0500
++++ general.c	2017-01-23 13:55:08.008447700 -0600
+@@ -48,6 +48,10 @@
+ 
+ #include <tilde/tilde.h>
+ 
++#ifdef __CYGWIN__
++# include <sys/cygwin.h>
++#endif
++
+ #if !defined (errno)
+ extern int errno;
+ #endif /* !errno */
+@@ -718,7 +722,8 @@ make_absolute (string, dot_path)
+     {
+       char pathbuf[PATH_MAX + 1];
+ 
+-      cygwin_conv_to_full_posix_path (string, pathbuf);
++      cygwin_conv_path (CCP_WIN_A_TO_POSIX | CCP_ABSOLUTE, string, pathbuf,
++			sizeof pathbuf);
+       result = savestring (pathbuf);
+     }
+ #else
+--- input.c	2015-09-24 18:49:23.000000000 -0500
++++ input.c	2017-01-23 13:55:08.008447700 -0600
+@@ -44,6 +44,10 @@
+ #include "quit.h"
+ #include "trap.h"
+ 
++#ifdef __CYGWIN__
++int igncr;
++#endif
++
+ #if !defined (errno)
+ extern int errno;
+ #endif /* !errno */
+@@ -561,6 +565,19 @@ buffered_getchar ()
+ {
+   CHECK_TERMSIG;
+ 
++#ifdef __CYGWIN__
++  /* shopt igncr discards carriage returns from the input stream.
++     If cr is the only character left in the buffer, recurse to pick
++     up the next byte; otherwise flatten the buffer.  */
++  if (igncr)
++    {
++      int ch;
++      while ((ch = bufstream_getc (buffers[bash_input.location.buffered_fd]))
++	     == '\r')
++	;
++      return ch;
++    }
++#endif
+ #if !defined (DJGPP)
+   return (bufstream_getc (buffers[bash_input.location.buffered_fd]));
+ #else
+--- lib/sh/pathphys.c	2013-05-28 14:33:58.000000000 -0500
++++ lib/sh/pathphys.c	2017-01-23 13:55:08.008447700 -0600
+@@ -35,6 +35,7 @@
+ #include <stdio.h>
+ #include <chartypes.h>
+ #include <errno.h>
++#include <stdlib.h>
+ 
+ #include "shell.h"
+ 
+@@ -76,6 +77,9 @@ sh_physpath (path, flags)
+      char *path;
+      int flags;
+ {
++#ifdef __CYGWIN__
++  return realpath (path, NULL);
++#endif
+   char tbuf[PATH_MAX+1], linkbuf[PATH_MAX+1];
+   char *result, *p, *q, *qsave, *qbase, *workpath;
+   int double_slash_path, linklen, nlink;
+@@ -214,11 +218,7 @@ error:
+ 	    {
+ 	      q = result;
+ 	      /* Duplicating some code here... */
+-#if defined (__CYGWIN__)
+-	      qbase = (ISALPHA((unsigned char)workpath[0]) && workpath[1] == ':') ? workpath + 3 : workpath + 1;
+-#else
+ 	      qbase = workpath + 1;
+-#endif
+ 	      double_slash_path = DOUBLE_SLASH (workpath);
+ 	      qbase += double_slash_path;
+     
+--- lib/sh/tmpfile.c	2016-08-11 10:05:58.000000000 -0500
++++ lib/sh/tmpfile.c	2017-01-23 13:55:08.008447700 -0600
+@@ -101,7 +101,7 @@ get_tmpdir (flags)
+   if (tdir && (file_iswdir (tdir) == 0 || strlen (tdir) > PATH_MAX))
+     tdir = 0;
+ 
+-  if (tdir == 0)
++  if (tdir == 0 || !file_iswdir (tdir))
+     tdir = get_sys_tmpdir ();
+ 
+ #if defined (HAVE_PATHCONF) && defined (_PC_NAME_MAX)
+--- mksyntax.c	2012-07-29 18:48:38.000000000 -0500
++++ mksyntax.c	2017-01-23 13:55:08.008447700 -0600
+@@ -29,13 +29,13 @@
+ 
+ #ifdef HAVE_UNISTD_H
+ #  include <unistd.h>
++#else
++extern int optind;
++extern char *optarg;
+ #endif
+ 
+ #include "syntax.h"
+ 
+-extern int optind;
+-extern char *optarg;
+-
+ #ifndef errno
+ extern int errno;
+ #endif
+--- parse.y	2016-09-11 10:31:46.000000000 -0500
++++ parse.y	2017-01-23 13:55:08.008447700 -0600
+@@ -1539,14 +1539,20 @@ yy_string_get ()
+   string = bash_input.location.string;
+ 
+   /* If the string doesn't exist, or is empty, EOF found. */
+-  if (string && *string)
++  while (string && *string)
+     {
+       c = *string++;
+       bash_input.location.string = string;
++#ifdef __CYGWIN__
++      {
++	extern int igncr;
++	if (igncr && c == '\r')
++	  continue;
++      }
++#endif
+       return (c);
+     }
+-  else
+-    return (EOF);
++  return (EOF);
+ }
+ 
+ static int
+--- subst.c	2017-01-23 13:28:06.955247200 -0600
++++ subst.c	2017-01-23 13:55:08.008447700 -0600
+@@ -43,6 +43,7 @@
+ #include "posixstat.h"
+ #include "bashintl.h"
+ 
++#define NEED_SH_SETLINEBUF_DECL
+ #include "shell.h"
+ #include "parser.h"
+ #include "flags.h"
+@@ -5964,6 +5965,13 @@ read_comsub (fd, quoted, rflag)
+ #endif
+ 	  continue;
+ 	}
++#ifdef __CYGWIN__
++      {
++	extern int igncr;
++	if (igncr && c == '\r')
++	  continue;
++      }
++#endif
+ 
+       /* Add the character to ISTRING, possibly after resizing it. */
+       RESIZE_MALLOCED_BUFFER (istring, istring_index, 2, istring_size, DEFAULT_ARRAY_SIZE);
+@@ -6088,6 +6096,28 @@ command_substitute (string, quoted)
+       goto error_exit;
+     }
+ 
++#ifdef __CYGWIN__
++  /* Passing a pipe through std fds can cause hangs when talking to a
++     non-cygwin child.  Move it.  */
++  if (fildes[0] < 3)
++    {
++      int fd = fcntl (fildes[0], F_DUPFD, 3);
++      close (fildes[0]);
++      fildes[0] = fd;
++    }
++  if (fildes[1] < 3)
++    {
++      int fd = fcntl (fildes[1], F_DUPFD, 3);
++      close (fildes[1]);
++      fildes[1] = fd;
++    }
++  if (fildes[0] < 0 || fildes[1] < 0)
++    {
++      sys_error (_("cannot make pipe for command substitution"));
++      goto error_exit;
++    }
++#endif /* __CYGWIN__ */
++
+   old_pid = last_made_pid;
+ #if defined (JOB_CONTROL)
+   old_pipeline_pgrp = pipeline_pgrp;
+--- support/bashversion.c	2008-09-09 08:31:53.000000000 -0500
++++ support/bashversion.c	2017-01-23 13:55:08.024037200 -0600
+@@ -26,6 +26,9 @@
+ 
+ #if defined (HAVE_UNISTD_H)
+ #  include <unistd.h>
++#else
++extern int optind;
++extern char *optarg;
+ #endif
+ 
+ #include "bashansi.h"
+@@ -41,9 +44,6 @@
+ #define LFLAG	0x0020
+ #define XFLAG	0x0040
+ 
+-extern int optind;
+-extern char *optarg;
+-
+ extern char *dist_version;
+ extern int patch_level;
+ 
+--- support/mkversion.sh	2008-08-13 07:25:57.000000000 -0500
++++ support/mkversion.sh	2017-01-23 13:55:08.024037200 -0600
+@@ -29,7 +29,7 @@ source_dir="."
+ while [ $# -gt 0 ]; do
+ 	case "$1" in
+ 	-o)	shift; OUTFILE=$1; shift ;;
+-	-b)	shift; inc_build=yes ;;
++	-b)	shift; ;; # inc_build=yes ;; # hacked out for cygport
+ 	-s)	shift; rel_status=$1; shift ;;
+ 	-p)	shift; patch_level=$1; shift ;;
+ 	-d)	shift; dist_version=$1; shift ;;
+--- variables.c	2016-06-15 15:05:52.000000000 -0500
++++ variables.c	2017-01-23 13:55:08.024037200 -0600
+@@ -5239,6 +5239,7 @@ sv_winsize (name)
+ /* Update the value of HOME in the export environment so tilde expansion will
+    work on cygwin. */
+ #if defined (__CYGWIN__)
++void
+ sv_home (name)
+      char *name;
+ {