summaryrefslogtreecommitdiff
path: root/gnulib-m4/sys_ioctl_h.m4
diff options
context:
space:
mode:
authorJörg Frings-Fürst <debian@jff.email>2022-01-08 11:51:07 +0100
committerJörg Frings-Fürst <debian@jff.email>2022-01-08 11:51:07 +0100
commitbe8efac78d067c138ad8dda03df4336e73f94887 (patch)
tree5f5254a628ba0ef72065b93d949d1c985742ea8e /gnulib-m4/sys_ioctl_h.m4
parent7b65dbd4ebade81d504cfe5e681292a58ad1fdf0 (diff)
New upstream version 1.0upstream/1.0
Diffstat (limited to 'gnulib-m4/sys_ioctl_h.m4')
-rw-r--r--gnulib-m4/sys_ioctl_h.m479
1 files changed, 79 insertions, 0 deletions
diff --git a/gnulib-m4/sys_ioctl_h.m4 b/gnulib-m4/sys_ioctl_h.m4
new file mode 100644
index 00000000..be653643
--- /dev/null
+++ b/gnulib-m4/sys_ioctl_h.m4
@@ -0,0 +1,79 @@
+# sys_ioctl_h.m4 serial 15
+dnl Copyright (C) 2008-2022 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl Written by Bruno Haible.
+
+AC_DEFUN_ONCE([gl_SYS_IOCTL_H],
+[
+ dnl Ensure to expand the default settings once only, before all statements
+ dnl that occur in other macros.
+ AC_REQUIRE([gl_SYS_IOCTL_H_DEFAULTS])
+
+ AC_CHECK_HEADERS_ONCE([sys/ioctl.h])
+ if test $ac_cv_header_sys_ioctl_h = yes; then
+ HAVE_SYS_IOCTL_H=1
+ dnl Test whether <sys/ioctl.h> declares ioctl(), or whether some other
+ dnl header file, such as <unistd.h> or <stropts.h>, is needed for that.
+ AC_CACHE_CHECK([whether <sys/ioctl.h> declares ioctl],
+ [gl_cv_decl_ioctl_in_sys_ioctl_h],
+ [dnl We cannot use AC_CHECK_DECL because it produces its own messages.
+ AC_COMPILE_IFELSE(
+ [AC_LANG_PROGRAM(
+ [[#include <sys/ioctl.h>]],
+ [[(void) ioctl;]])],
+ [gl_cv_decl_ioctl_in_sys_ioctl_h=yes],
+ [gl_cv_decl_ioctl_in_sys_ioctl_h=no])
+ ])
+ else
+ HAVE_SYS_IOCTL_H=0
+ fi
+ AC_SUBST([HAVE_SYS_IOCTL_H])
+ dnl <sys/ioctl.h> is always overridden, because of GNULIB_POSIXCHECK.
+ gl_CHECK_NEXT_HEADERS([sys/ioctl.h])
+
+ dnl Check for declarations of anything we want to poison if the
+ dnl corresponding gnulib module is not in use.
+ gl_WARN_ON_USE_PREPARE([[#include <sys/ioctl.h>
+/* Some platforms declare ioctl in the wrong header. */
+#if !(defined __GLIBC__ && !defined __UCLIBC__)
+# include <unistd.h>
+#endif
+ ]], [ioctl])
+])
+
+# gl_SYS_IOCTL_MODULE_INDICATOR([modulename])
+# sets the shell variable that indicates the presence of the given module
+# to a C preprocessor expression that will evaluate to 1.
+# This macro invocation must not occur in macros that are AC_REQUIREd.
+AC_DEFUN([gl_SYS_IOCTL_MODULE_INDICATOR],
+[
+ dnl Ensure to expand the default settings once only.
+ gl_SYS_IOCTL_H_REQUIRE_DEFAULTS
+ gl_MODULE_INDICATOR_SET_VARIABLE([$1])
+ dnl Define it also as a C macro, for the benefit of the unit tests.
+ gl_MODULE_INDICATOR_FOR_TESTS([$1])
+])
+
+# Initializes the default values for AC_SUBSTed shell variables.
+# This macro must not be AC_REQUIREd. It must only be invoked, and only
+# outside of macros or in macros that are not AC_REQUIREd.
+AC_DEFUN([gl_SYS_IOCTL_H_REQUIRE_DEFAULTS],
+[
+ m4_defun(GL_MODULE_INDICATOR_PREFIX[_SYS_IOCTL_H_MODULE_INDICATOR_DEFAULTS], [
+ gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_IOCTL])
+ ])
+ m4_require(GL_MODULE_INDICATOR_PREFIX[_SYS_IOCTL_H_MODULE_INDICATOR_DEFAULTS])
+ AC_REQUIRE([gl_SYS_IOCTL_H_DEFAULTS])
+])
+
+AC_DEFUN([gl_SYS_IOCTL_H_DEFAULTS],
+[
+ dnl Assume proper GNU behavior unless another module says otherwise.
+ SYS_IOCTL_H_HAVE_WINSOCK2_H=0; AC_SUBST([SYS_IOCTL_H_HAVE_WINSOCK2_H])
+ SYS_IOCTL_H_HAVE_WINSOCK2_H_AND_USE_SOCKETS=0;
+ AC_SUBST([SYS_IOCTL_H_HAVE_WINSOCK2_H_AND_USE_SOCKETS])
+ REPLACE_IOCTL=0; AC_SUBST([REPLACE_IOCTL])
+])