Conditionally compile in the SIGWINCH handler

Not all systems have SIGWINCH.  But this isn't an essential
feature so only compile it in if its available.

diff --git a/configure.ac b/configure.ac
index b06392a58670395c1790406c14b311ab98f0821f..09a2e3e42b4b623efe46b9c049ca1480d67a1056 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -288,6 +288,16 @@ PSPP_READLINE
 dnl Checks for header files.
 AC_CHECK_HEADERS([sys/wait.h fpu_control.h ieeefp.h fenv.h pwd.h])
 
+dnl Some systems dont have SIGWINCH
+AC_CHECK_DECLS([SIGWINCH], [], [],
+          [#include <signal.h>
+          /* NetBSD declares sys_siglist in unistd.h.  */
+          #ifdef HAVE_UNISTD_H
+          # include <unistd.h>
+          #endif
+          ])
+
+
 # For gnulib.
 gl_INIT
 

diff --git a/src/output/ascii.c b/src/output/ascii.c
index 8b48d9bdd508417c169ac209b41ffb9a720e4bb1..00e3f33cbdfba56df6f6f290c0b4dc7d8a5e0da8 100644 (file)
--- a/src/output/ascii.c
+++ b/src/output/ascii.c
@@ -788,6 +788,8 @@ ascii_layout_cell (struct ascii_driver *a, const struct table_cell *cell,
 \f
 /* ascii_close_page () and support routines. */
 
+
+#if HAVE_DECL_SIGWINCH
 static struct ascii_driver *the_driver;
 
 static void
@@ -795,6 +797,7 @@ winch_handler (int signum UNUSED)
 {
   update_page_size (the_driver, false);
 }
+#endif
 
 static bool
 ascii_open_page (struct ascii_driver *a)
@@ -809,6 +812,7 @@ ascii_open_page (struct ascii_driver *a)
       a->file = fn_open (a->file_name, a->append ? "a" : "w");
       if (a->file != NULL)
         {
+#if HAVE_DECL_SIGWINCH
          if ( isatty (fileno (a->file)))
            {
              struct sigaction action;
@@ -820,7 +824,7 @@ ascii_open_page (struct ascii_driver *a)
              a->auto_length = true;
              sigaction (SIGWINCH, &action, NULL);
            }
-
+#endif
           if (a->init != NULL)
             fputs (a->init, a->file);
         }