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105 lines
3.3 KiB
Plaintext
105 lines
3.3 KiB
Plaintext
# getdomainname.m4 serial 10
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dnl Copyright (C) 2002-2003, 2008-2017 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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AC_DEFUN([gl_FUNC_GETDOMAINNAME],
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[
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AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
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AC_REQUIRE([gl_HEADER_SYS_SOCKET])dnl for HAVE_SYS_SOCKET_H
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AC_REQUIRE([gl_HEADER_NETDB])dnl for HAVE_NETDB_H
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dnl Persuade glibc <unistd.h> to declare getdomainname().
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AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
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dnl Where is getdomainname() defined?
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dnl - On Solaris, it is in libnsl. But this function is not declared and
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dnl is discouraged, see
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dnl <http://www.sun.com/software/solaris/programs/abi/appcert_faq.xml#q18>.
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dnl We need to avoid a collision with this function.
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dnl - Otherwise it is in libc.
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AC_CHECK_FUNCS([getdomainname], , [
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AC_CACHE_CHECK([for getdomainname in -lnsl],
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[gl_cv_func_getdomainname_in_libnsl],
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[gl_cv_func_getdomainname_in_libnsl=no
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gl_save_LIBS="$LIBS"
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LIBS="$LIBS -lnsl"
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AC_LINK_IFELSE(
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[AC_LANG_PROGRAM(
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[[#include <stddef.h>
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extern
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#ifdef __cplusplus
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"C"
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#endif
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int getdomainname (char *, size_t);
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]],
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[[getdomainname(NULL, 0);]])],
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[gl_cv_func_getdomainname_in_libnsl=yes])
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LIBS="$gl_save_LIBS"
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])
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])
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dnl What about the declaration?
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dnl - It's int getdomainname(char *, size_t) on glibc, NetBSD, OpenBSD.
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dnl - It's int getdomainname(char *, int) on Mac OS X, FreeBSD, AIX, IRIX,
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dnl OSF/1.
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AC_CHECK_DECLS([getdomainname], , ,
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[[#include <sys/types.h>
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#ifdef HAVE_SYS_SOCKET_H
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#include <sys/socket.h>
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#endif
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#ifdef HAVE_NETDB_H
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#include <netdb.h>
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#endif
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#include <unistd.h>
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]])
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AC_CACHE_CHECK([for getdomainname's second argument type],
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[gl_cv_decl_getdomainname_argtype2],
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[if test $ac_cv_have_decl_getdomainname; then
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AC_COMPILE_IFELSE(
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[AC_LANG_PROGRAM(
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[[#include <sys/types.h>
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#ifdef HAVE_SYS_SOCKET_H
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#include <sys/socket.h>
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#endif
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#ifdef HAVE_NETDB_H
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#include <netdb.h>
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#endif
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#include <unistd.h>
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extern
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#ifdef __cplusplus
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"C"
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#endif
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int getdomainname (char *, int);
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]],
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[[]])],
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[gl_cv_decl_getdomainname_argtype2='int'],
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[gl_cv_decl_getdomainname_argtype2='size_t'])
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else
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gl_cv_decl_getdomainname_argtype2='int'
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fi
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])
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if test $ac_cv_have_decl_getdomainname = no; then
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HAVE_DECL_GETDOMAINNAME=0
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fi
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if { test $ac_cv_func_getdomainname = yes \
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&& test $gl_cv_decl_getdomainname_argtype2 != size_t; \
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} \
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|| test "$gl_cv_func_getdomainname_in_libnsl" = yes; then
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REPLACE_GETDOMAINNAME=1
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fi
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])
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# Prerequisites of lib/getdomainname.c.
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AC_DEFUN([gl_PREREQ_GETDOMAINNAME], [
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if test $ac_cv_func_getdomainname = yes; then
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AC_DEFINE([HAVE_GETDOMAINNAME], [1],
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[Define if the getdomainname() function is present and can be used.])
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fi
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AC_CHECK_HEADERS([sys/systeminfo.h])
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AC_CHECK_FUNCS([sysinfo])
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])
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