[binutils-gdb] Fix readline build on mingw

[Tom Tromey]

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=975cb893f45de2a927e226883e7a76ee5e333baa

commit 975cb893f45de2a927e226883e7a76ee5e333baa
Author: Tom Tromey <tom@tromey.com>
Date:   Sat Nov 16 13:43:22 2024 -0700

    Fix readline build on mingw
    
    Upstream readline 8.2 does not build on mingw.  This patch fixes the
    build, but I do not know how well it works.
    
    I've submitted this to readline here:
    
        https://lists.gnu.org/archive/html/bug-readline/2024-11/msg00007.html
    
    Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=32265

Diff:
---
 readline/readline/input.c     | 9 ++++++++-
 readline/readline/rlprivate.h | 2 +-
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/readline/readline/input.c b/readline/readline/input.c
index f68fcac553c..39bbff1398a 100644
--- a/readline/readline/input.c
+++ b/readline/readline/input.c
@@ -21,6 +21,13 @@
 
 #define READLINE_LIBRARY
 
+#if defined (__MINGW32__)
+/* These are needed to get the declaration of 'alarm' when including
+   <unistd.h>.  */
+#define __USE_MINGW_ALARM
+#define _POSIX
+#endif
+
 #if defined (__TANDEM)
 #  define _XOPEN_SOURCE_EXTENDED 1
 #  define _TANDEM_SOURCE 1
@@ -834,7 +841,7 @@ rl_getc (FILE *stream)
       /* We know at this point that _rl_caught_signal == 0 */
 
 #if defined (__MINGW32__)
-      if (isatty (fd)
+      if (isatty (fd))
 	return (_getch ());	/* "There is no error return." */
 #endif
       result = 0;
diff --git a/readline/readline/rlprivate.h b/readline/readline/rlprivate.h
index d87d07a72ee..cb9cf1791e2 100644
--- a/readline/readline/rlprivate.h
+++ b/readline/readline/rlprivate.h
@@ -303,7 +303,7 @@ extern int _rl_pushed_input_available (void);
 
 extern int _rl_timeout_init (void);
 extern int _rl_timeout_handle_sigalrm (void);
-#if defined (_POSIXSELECT_H_)
+#if defined (RL_TIMEOUT_USE_SELECT)
 /* use as a sentinel for fd_set, struct timeval,  and sigset_t definitions */
 extern int _rl_timeout_select (int, fd_set *, fd_set *, fd_set *, const struct timeval *, const sigset_t *);
 #endif