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65 lines
2.4 KiB
Plaintext
65 lines
2.4 KiB
Plaintext
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# sys_ioctl_h.m4 serial 10
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dnl Copyright (C) 2008-2019 Free Software Foundation, Inc.
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dnl This file is free software; the Free Software Foundation
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dnl gives unlimited permission to copy and/or distribute it,
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dnl with or without modifications, as long as this notice is preserved.
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dnl Written by Bruno Haible.
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AC_DEFUN([gl_SYS_IOCTL_H],
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[
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dnl Use AC_REQUIRE here, so that the default behavior below is expanded
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dnl once only, before all statements that occur in other macros.
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AC_REQUIRE([gl_SYS_IOCTL_H_DEFAULTS])
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AC_CHECK_HEADERS_ONCE([sys/ioctl.h])
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if test $ac_cv_header_sys_ioctl_h = yes; then
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HAVE_SYS_IOCTL_H=1
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dnl Test whether <sys/ioctl.h> declares ioctl(), or whether some other
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dnl header file, such as <unistd.h> or <stropts.h>, is needed for that.
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AC_CACHE_CHECK([whether <sys/ioctl.h> declares ioctl],
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[gl_cv_decl_ioctl_in_sys_ioctl_h],
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[dnl We cannot use AC_CHECK_DECL because it produces its own messages.
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AC_COMPILE_IFELSE(
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[AC_LANG_PROGRAM(
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[AC_INCLUDES_DEFAULT([#include <sys/ioctl.h>])],
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[(void) ioctl;])],
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[gl_cv_decl_ioctl_in_sys_ioctl_h=yes],
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[gl_cv_decl_ioctl_in_sys_ioctl_h=no])
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])
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else
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HAVE_SYS_IOCTL_H=0
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fi
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AC_SUBST([HAVE_SYS_IOCTL_H])
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dnl <sys/ioctl.h> is always overridden, because of GNULIB_POSIXCHECK.
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gl_CHECK_NEXT_HEADERS([sys/ioctl.h])
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dnl Check for declarations of anything we want to poison if the
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dnl corresponding gnulib module is not in use.
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gl_WARN_ON_USE_PREPARE([[#include <sys/ioctl.h>
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/* Some platforms declare ioctl in the wrong header. */
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#if !(defined __GLIBC__ && !defined __UCLIBC__)
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# include <unistd.h>
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#endif
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]], [ioctl])
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])
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AC_DEFUN([gl_SYS_IOCTL_MODULE_INDICATOR],
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[
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dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
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AC_REQUIRE([gl_SYS_IOCTL_H_DEFAULTS])
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gl_MODULE_INDICATOR_SET_VARIABLE([$1])
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dnl Define it also as a C macro, for the benefit of the unit tests.
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gl_MODULE_INDICATOR_FOR_TESTS([$1])
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])
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AC_DEFUN([gl_SYS_IOCTL_H_DEFAULTS],
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[
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GNULIB_IOCTL=0; AC_SUBST([GNULIB_IOCTL])
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dnl Assume proper GNU behavior unless another module says otherwise.
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SYS_IOCTL_H_HAVE_WINSOCK2_H=0; AC_SUBST([SYS_IOCTL_H_HAVE_WINSOCK2_H])
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SYS_IOCTL_H_HAVE_WINSOCK2_H_AND_USE_SOCKETS=0;
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AC_SUBST([SYS_IOCTL_H_HAVE_WINSOCK2_H_AND_USE_SOCKETS])
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REPLACE_IOCTL=0; AC_SUBST([REPLACE_IOCTL])
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])
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