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-rw-r--r--src/c-ares/m4/cares-reentrant.m4611
1 files changed, 611 insertions, 0 deletions
diff --git a/src/c-ares/m4/cares-reentrant.m4 b/src/c-ares/m4/cares-reentrant.m4
new file mode 100644
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--- /dev/null
+++ b/src/c-ares/m4/cares-reentrant.m4
@@ -0,0 +1,611 @@
+#***************************************************************************
+# $Id$
+#
+# Copyright (C) 2008 - 2009 by Daniel Stenberg et al
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose and without fee is hereby granted, provided
+# that the above copyright notice appear in all copies and that both that
+# copyright notice and this permission notice appear in supporting
+# documentation, and that the name of M.I.T. not be used in advertising or
+# publicity pertaining to distribution of the software without specific,
+# written prior permission. M.I.T. makes no representations about the
+# suitability of this software for any purpose. It is provided "as is"
+# without express or implied warranty.
+#
+#***************************************************************************
+
+# File version for 'aclocal' use. Keep it a single number.
+# serial 6
+
+dnl Note 1
+dnl ------
+dnl None of the CARES_CHECK_NEED_REENTRANT_* macros shall use HAVE_FOO_H to
+dnl conditionally include header files. These macros are used early in the
+dnl configure process much before header file availability is known.
+
+
+dnl CARES_CHECK_NEED_REENTRANT_ERRNO
+dnl -------------------------------------------------
+dnl Checks if the preprocessor _REENTRANT definition
+dnl makes errno available as a preprocessor macro.
+
+AC_DEFUN([CARES_CHECK_NEED_REENTRANT_ERRNO], [
+ AC_COMPILE_IFELSE([
+ AC_LANG_PROGRAM([[
+#include <errno.h>
+ ]],[[
+ if(0 != errno)
+ return 1;
+ ]])
+ ],[
+ tmp_errno="yes"
+ ],[
+ tmp_errno="no"
+ ])
+ if test "$tmp_errno" = "yes"; then
+ AC_COMPILE_IFELSE([
+ AC_LANG_PROGRAM([[
+#include <errno.h>
+ ]],[[
+#ifdef errno
+ int dummy=1;
+#else
+ force compilation error
+#endif
+ ]])
+ ],[
+ tmp_errno="errno_macro_defined"
+ ],[
+ AC_COMPILE_IFELSE([
+ AC_LANG_PROGRAM([[
+#define _REENTRANT
+#include <errno.h>
+ ]],[[
+#ifdef errno
+ int dummy=1;
+#else
+ force compilation error
+#endif
+ ]])
+ ],[
+ tmp_errno="errno_macro_needs_reentrant"
+ tmp_need_reentrant="yes"
+ ])
+ ])
+ fi
+])
+
+
+dnl CARES_CHECK_NEED_REENTRANT_GMTIME_R
+dnl -------------------------------------------------
+dnl Checks if the preprocessor _REENTRANT definition
+dnl makes function gmtime_r compiler visible.
+
+AC_DEFUN([CARES_CHECK_NEED_REENTRANT_GMTIME_R], [
+ AC_LINK_IFELSE([
+ AC_LANG_FUNC_LINK_TRY([gmtime_r])
+ ],[
+ tmp_gmtime_r="yes"
+ ],[
+ tmp_gmtime_r="no"
+ ])
+ if test "$tmp_gmtime_r" = "yes"; then
+ AC_EGREP_CPP([gmtime_r],[
+#include <sys/types.h>
+#include <time.h>
+ ],[
+ tmp_gmtime_r="proto_declared"
+ ],[
+ AC_EGREP_CPP([gmtime_r],[
+#define _REENTRANT
+#include <sys/types.h>
+#include <time.h>
+ ],[
+ tmp_gmtime_r="proto_needs_reentrant"
+ tmp_need_reentrant="yes"
+ ])
+ ])
+ fi
+])
+
+
+dnl CARES_CHECK_NEED_REENTRANT_LOCALTIME_R
+dnl -------------------------------------------------
+dnl Checks if the preprocessor _REENTRANT definition
+dnl makes function localtime_r compiler visible.
+
+AC_DEFUN([CARES_CHECK_NEED_REENTRANT_LOCALTIME_R], [
+ AC_LINK_IFELSE([
+ AC_LANG_FUNC_LINK_TRY([localtime_r])
+ ],[
+ tmp_localtime_r="yes"
+ ],[
+ tmp_localtime_r="no"
+ ])
+ if test "$tmp_localtime_r" = "yes"; then
+ AC_EGREP_CPP([localtime_r],[
+#include <sys/types.h>
+#include <time.h>
+ ],[
+ tmp_localtime_r="proto_declared"
+ ],[
+ AC_EGREP_CPP([localtime_r],[
+#define _REENTRANT
+#include <sys/types.h>
+#include <time.h>
+ ],[
+ tmp_localtime_r="proto_needs_reentrant"
+ tmp_need_reentrant="yes"
+ ])
+ ])
+ fi
+])
+
+
+dnl CARES_CHECK_NEED_REENTRANT_STRERROR_R
+dnl -------------------------------------------------
+dnl Checks if the preprocessor _REENTRANT definition
+dnl makes function strerror_r compiler visible.
+
+AC_DEFUN([CARES_CHECK_NEED_REENTRANT_STRERROR_R], [
+ AC_LINK_IFELSE([
+ AC_LANG_FUNC_LINK_TRY([strerror_r])
+ ],[
+ tmp_strerror_r="yes"
+ ],[
+ tmp_strerror_r="no"
+ ])
+ if test "$tmp_strerror_r" = "yes"; then
+ AC_EGREP_CPP([strerror_r],[
+#include <sys/types.h>
+#include <string.h>
+ ],[
+ tmp_strerror_r="proto_declared"
+ ],[
+ AC_EGREP_CPP([strerror_r],[
+#define _REENTRANT
+#include <sys/types.h>
+#include <string.h>
+ ],[
+ tmp_strerror_r="proto_needs_reentrant"
+ tmp_need_reentrant="yes"
+ ])
+ ])
+ fi
+])
+
+
+dnl CARES_CHECK_NEED_REENTRANT_STRTOK_R
+dnl -------------------------------------------------
+dnl Checks if the preprocessor _REENTRANT definition
+dnl makes function strtok_r compiler visible.
+
+AC_DEFUN([CARES_CHECK_NEED_REENTRANT_STRTOK_R], [
+ AC_LINK_IFELSE([
+ AC_LANG_FUNC_LINK_TRY([strtok_r])
+ ],[
+ tmp_strtok_r="yes"
+ ],[
+ tmp_strtok_r="no"
+ ])
+ if test "$tmp_strtok_r" = "yes"; then
+ AC_EGREP_CPP([strtok_r],[
+#include <sys/types.h>
+#include <string.h>
+ ],[
+ tmp_strtok_r="proto_declared"
+ ],[
+ AC_EGREP_CPP([strtok_r],[
+#define _REENTRANT
+#include <sys/types.h>
+#include <string.h>
+ ],[
+ tmp_strtok_r="proto_needs_reentrant"
+ tmp_need_reentrant="yes"
+ ])
+ ])
+ fi
+])
+
+
+dnl CARES_CHECK_NEED_REENTRANT_INET_NTOA_R
+dnl -------------------------------------------------
+dnl Checks if the preprocessor _REENTRANT definition
+dnl makes function inet_ntoa_r compiler visible.
+
+AC_DEFUN([CARES_CHECK_NEED_REENTRANT_INET_NTOA_R], [
+ AC_LINK_IFELSE([
+ AC_LANG_FUNC_LINK_TRY([inet_ntoa_r])
+ ],[
+ tmp_inet_ntoa_r="yes"
+ ],[
+ tmp_inet_ntoa_r="no"
+ ])
+ if test "$tmp_inet_ntoa_r" = "yes"; then
+ AC_EGREP_CPP([inet_ntoa_r],[
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+ ],[
+ tmp_inet_ntoa_r="proto_declared"
+ ],[
+ AC_EGREP_CPP([inet_ntoa_r],[
+#define _REENTRANT
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+ ],[
+ tmp_inet_ntoa_r="proto_needs_reentrant"
+ tmp_need_reentrant="yes"
+ ])
+ ])
+ fi
+])
+
+
+dnl CARES_CHECK_NEED_REENTRANT_GETHOSTBYADDR_R
+dnl -------------------------------------------------
+dnl Checks if the preprocessor _REENTRANT definition
+dnl makes function gethostbyaddr_r compiler visible.
+
+AC_DEFUN([CARES_CHECK_NEED_REENTRANT_GETHOSTBYADDR_R], [
+ AC_LINK_IFELSE([
+ AC_LANG_FUNC_LINK_TRY([gethostbyaddr_r])
+ ],[
+ tmp_gethostbyaddr_r="yes"
+ ],[
+ tmp_gethostbyaddr_r="no"
+ ])
+ if test "$tmp_gethostbyaddr_r" = "yes"; then
+ AC_EGREP_CPP([gethostbyaddr_r],[
+#include <sys/types.h>
+#include <netdb.h>
+ ],[
+ tmp_gethostbyaddr_r="proto_declared"
+ ],[
+ AC_EGREP_CPP([gethostbyaddr_r],[
+#define _REENTRANT
+#include <sys/types.h>
+#include <netdb.h>
+ ],[
+ tmp_gethostbyaddr_r="proto_needs_reentrant"
+ tmp_need_reentrant="yes"
+ ])
+ ])
+ fi
+])
+
+
+dnl CARES_CHECK_NEED_REENTRANT_GETHOSTBYNAME_R
+dnl -------------------------------------------------
+dnl Checks if the preprocessor _REENTRANT definition
+dnl makes function gethostbyname_r compiler visible.
+
+AC_DEFUN([CARES_CHECK_NEED_REENTRANT_GETHOSTBYNAME_R], [
+ AC_LINK_IFELSE([
+ AC_LANG_FUNC_LINK_TRY([gethostbyname_r])
+ ],[
+ tmp_gethostbyname_r="yes"
+ ],[
+ tmp_gethostbyname_r="no"
+ ])
+ if test "$tmp_gethostbyname_r" = "yes"; then
+ AC_EGREP_CPP([gethostbyname_r],[
+#include <sys/types.h>
+#include <netdb.h>
+ ],[
+ tmp_gethostbyname_r="proto_declared"
+ ],[
+ AC_EGREP_CPP([gethostbyname_r],[
+#define _REENTRANT
+#include <sys/types.h>
+#include <netdb.h>
+ ],[
+ tmp_gethostbyname_r="proto_needs_reentrant"
+ tmp_need_reentrant="yes"
+ ])
+ ])
+ fi
+])
+
+
+dnl CARES_CHECK_NEED_REENTRANT_GETPROTOBYNAME_R
+dnl -------------------------------------------------
+dnl Checks if the preprocessor _REENTRANT definition
+dnl makes function getprotobyname_r compiler visible.
+
+AC_DEFUN([CARES_CHECK_NEED_REENTRANT_GETPROTOBYNAME_R], [
+ AC_LINK_IFELSE([
+ AC_LANG_FUNC_LINK_TRY([getprotobyname_r])
+ ],[
+ tmp_getprotobyname_r="yes"
+ ],[
+ tmp_getprotobyname_r="no"
+ ])
+ if test "$tmp_getprotobyname_r" = "yes"; then
+ AC_EGREP_CPP([getprotobyname_r],[
+#include <sys/types.h>
+#include <netdb.h>
+ ],[
+ tmp_getprotobyname_r="proto_declared"
+ ],[
+ AC_EGREP_CPP([getprotobyname_r],[
+#define _REENTRANT
+#include <sys/types.h>
+#include <netdb.h>
+ ],[
+ tmp_getprotobyname_r="proto_needs_reentrant"
+ tmp_need_reentrant="yes"
+ ])
+ ])
+ fi
+])
+
+
+dnl CARES_CHECK_NEED_REENTRANT_GETSERVBYPORT_R
+dnl -------------------------------------------------
+dnl Checks if the preprocessor _REENTRANT definition
+dnl makes function getservbyport_r compiler visible.
+
+AC_DEFUN([CARES_CHECK_NEED_REENTRANT_GETSERVBYPORT_R], [
+ AC_LINK_IFELSE([
+ AC_LANG_FUNC_LINK_TRY([getservbyport_r])
+ ],[
+ tmp_getservbyport_r="yes"
+ ],[
+ tmp_getservbyport_r="no"
+ ])
+ if test "$tmp_getservbyport_r" = "yes"; then
+ AC_EGREP_CPP([getservbyport_r],[
+#include <sys/types.h>
+#include <netdb.h>
+ ],[
+ tmp_getservbyport_r="proto_declared"
+ ],[
+ AC_EGREP_CPP([getservbyport_r],[
+#define _REENTRANT
+#include <sys/types.h>
+#include <netdb.h>
+ ],[
+ tmp_getservbyport_r="proto_needs_reentrant"
+ tmp_need_reentrant="yes"
+ ])
+ ])
+ fi
+])
+
+
+dnl CARES_CHECK_NEED_REENTRANT_FUNCTIONS_R
+dnl -------------------------------------------------
+dnl Checks if the preprocessor _REENTRANT definition
+dnl makes several _r functions compiler visible.
+dnl Internal macro for CARES_CONFIGURE_REENTRANT.
+
+AC_DEFUN([CARES_CHECK_NEED_REENTRANT_FUNCTIONS_R], [
+ if test "$tmp_need_reentrant" = "no"; then
+ CARES_CHECK_NEED_REENTRANT_GMTIME_R
+ fi
+ if test "$tmp_need_reentrant" = "no"; then
+ CARES_CHECK_NEED_REENTRANT_LOCALTIME_R
+ fi
+ if test "$tmp_need_reentrant" = "no"; then
+ CARES_CHECK_NEED_REENTRANT_STRERROR_R
+ fi
+ if test "$tmp_need_reentrant" = "no"; then
+ CARES_CHECK_NEED_REENTRANT_STRTOK_R
+ fi
+ if test "$tmp_need_reentrant" = "no"; then
+ CARES_CHECK_NEED_REENTRANT_INET_NTOA_R
+ fi
+ if test "$tmp_need_reentrant" = "no"; then
+ CARES_CHECK_NEED_REENTRANT_GETHOSTBYADDR_R
+ fi
+ if test "$tmp_need_reentrant" = "no"; then
+ CARES_CHECK_NEED_REENTRANT_GETHOSTBYNAME_R
+ fi
+ if test "$tmp_need_reentrant" = "no"; then
+ CARES_CHECK_NEED_REENTRANT_GETPROTOBYNAME_R
+ fi
+ if test "$tmp_need_reentrant" = "no"; then
+ CARES_CHECK_NEED_REENTRANT_GETSERVBYPORT_R
+ fi
+])
+
+
+dnl CARES_CHECK_NEED_REENTRANT_SYSTEM
+dnl -------------------------------------------------
+dnl Checks if the preprocessor _REENTRANT definition
+dnl must be unconditionally done for this platform.
+dnl Internal macro for CARES_CONFIGURE_REENTRANT.
+
+AC_DEFUN([CARES_CHECK_NEED_REENTRANT_SYSTEM], [
+ case $host_os in
+ solaris*)
+ tmp_need_reentrant="yes"
+ ;;
+ *)
+ tmp_need_reentrant="no"
+ ;;
+ esac
+])
+
+
+dnl CARES_CHECK_NEED_THREAD_SAFE_SYSTEM
+dnl -------------------------------------------------
+dnl Checks if the preprocessor _THREAD_SAFE definition
+dnl must be unconditionally done for this platform.
+dnl Internal macro for CARES_CONFIGURE_THREAD_SAFE.
+
+AC_DEFUN([CARES_CHECK_NEED_THREAD_SAFE_SYSTEM], [
+ case $host_os in
+ aix[[123]].* | aix4.[[012]].*)
+ dnl aix 4.2 and older
+ tmp_need_thread_safe="no"
+ ;;
+ aix*)
+ dnl AIX 4.3 and newer
+ tmp_need_thread_safe="yes"
+ ;;
+ *)
+ tmp_need_thread_safe="no"
+ ;;
+ esac
+])
+
+
+dnl CARES_CONFIGURE_FROM_NOW_ON_WITH_REENTRANT
+dnl -------------------------------------------------
+dnl This macro ensures that configuration tests done
+dnl after this will execute with preprocessor symbol
+dnl _REENTRANT defined. This macro also ensures that
+dnl the generated config file defines NEED_REENTRANT
+dnl and that in turn setup.h will define _REENTRANT.
+dnl Internal macro for CARES_CONFIGURE_REENTRANT.
+
+AC_DEFUN([CARES_CONFIGURE_FROM_NOW_ON_WITH_REENTRANT], [
+AC_DEFINE(NEED_REENTRANT, 1,
+ [Define to 1 if _REENTRANT preprocessor symbol must be defined.])
+cat >>confdefs.h <<_EOF
+#ifndef _REENTRANT
+# define _REENTRANT
+#endif
+_EOF
+])
+
+
+dnl CARES_CONFIGURE_FROM_NOW_ON_WITH_THREAD_SAFE
+dnl -------------------------------------------------
+dnl This macro ensures that configuration tests done
+dnl after this will execute with preprocessor symbol
+dnl _THREAD_SAFE defined. This macro also ensures that
+dnl the generated config file defines NEED_THREAD_SAFE
+dnl and that in turn setup.h will define _THREAD_SAFE.
+dnl Internal macro for CARES_CONFIGURE_THREAD_SAFE.
+
+AC_DEFUN([CARES_CONFIGURE_FROM_NOW_ON_WITH_THREAD_SAFE], [
+AC_DEFINE(NEED_THREAD_SAFE, 1,
+ [Define to 1 if _THREAD_SAFE preprocessor symbol must be defined.])
+cat >>confdefs.h <<_EOF
+#ifndef _THREAD_SAFE
+# define _THREAD_SAFE
+#endif
+_EOF
+])
+
+
+dnl CARES_CONFIGURE_REENTRANT
+dnl -------------------------------------------------
+dnl This first checks if the preprocessor _REENTRANT
+dnl symbol is already defined. If it isn't currently
+dnl defined a set of checks are performed to verify
+dnl if its definition is required to make visible to
+dnl the compiler a set of *_r functions. Finally, if
+dnl _REENTRANT is already defined or needed it takes
+dnl care of making adjustments necessary to ensure
+dnl that it is defined equally for further configure
+dnl tests and generated config file.
+
+AC_DEFUN([CARES_CONFIGURE_REENTRANT], [
+ AC_PREREQ([2.50])dnl
+ #
+ AC_MSG_CHECKING([if _REENTRANT is already defined])
+ AC_COMPILE_IFELSE([
+ AC_LANG_PROGRAM([[
+ ]],[[
+#ifdef _REENTRANT
+ int dummy=1;
+#else
+ force compilation error
+#endif
+ ]])
+ ],[
+ AC_MSG_RESULT([yes])
+ tmp_reentrant_initially_defined="yes"
+ ],[
+ AC_MSG_RESULT([no])
+ tmp_reentrant_initially_defined="no"
+ ])
+ #
+ if test "$tmp_reentrant_initially_defined" = "no"; then
+ AC_MSG_CHECKING([if _REENTRANT is actually needed])
+ CARES_CHECK_NEED_REENTRANT_SYSTEM
+ if test "$tmp_need_reentrant" = "no"; then
+ CARES_CHECK_NEED_REENTRANT_ERRNO
+ fi
+ if test "$tmp_need_reentrant" = "no"; then
+ CARES_CHECK_NEED_REENTRANT_FUNCTIONS_R
+ fi
+ if test "$tmp_need_reentrant" = "yes"; then
+ AC_MSG_RESULT([yes])
+ else
+ AC_MSG_RESULT([no])
+ fi
+ fi
+ #
+ AC_MSG_CHECKING([if _REENTRANT is onwards defined])
+ if test "$tmp_reentrant_initially_defined" = "yes" ||
+ test "$tmp_need_reentrant" = "yes"; then
+ CARES_CONFIGURE_FROM_NOW_ON_WITH_REENTRANT
+ AC_MSG_RESULT([yes])
+ else
+ AC_MSG_RESULT([no])
+ fi
+ #
+])
+
+
+dnl CARES_CONFIGURE_THREAD_SAFE
+dnl -------------------------------------------------
+dnl This first checks if the preprocessor _THREAD_SAFE
+dnl symbol is already defined. If it isn't currently
+dnl defined a set of checks are performed to verify
+dnl if its definition is required. Finally, if
+dnl _THREAD_SAFE is already defined or needed it takes
+dnl care of making adjustments necessary to ensure
+dnl that it is defined equally for further configure
+dnl tests and generated config file.
+
+AC_DEFUN([CARES_CONFIGURE_THREAD_SAFE], [
+ AC_PREREQ([2.50])dnl
+ #
+ AC_MSG_CHECKING([if _THREAD_SAFE is already defined])
+ AC_COMPILE_IFELSE([
+ AC_LANG_PROGRAM([[
+ ]],[[
+#ifdef _THREAD_SAFE
+ int dummy=1;
+#else
+ force compilation error
+#endif
+ ]])
+ ],[
+ AC_MSG_RESULT([yes])
+ tmp_thread_safe_initially_defined="yes"
+ ],[
+ AC_MSG_RESULT([no])
+ tmp_thread_safe_initially_defined="no"
+ ])
+ #
+ if test "$tmp_thread_safe_initially_defined" = "no"; then
+ AC_MSG_CHECKING([if _THREAD_SAFE is actually needed])
+ CARES_CHECK_NEED_THREAD_SAFE_SYSTEM
+ if test "$tmp_need_thread_safe" = "yes"; then
+ AC_MSG_RESULT([yes])
+ else
+ AC_MSG_RESULT([no])
+ fi
+ fi
+ #
+ AC_MSG_CHECKING([if _THREAD_SAFE is onwards defined])
+ if test "$tmp_thread_safe_initially_defined" = "yes" ||
+ test "$tmp_need_thread_safe" = "yes"; then
+ CARES_CONFIGURE_FROM_NOW_ON_WITH_THREAD_SAFE
+ AC_MSG_RESULT([yes])
+ else
+ AC_MSG_RESULT([no])
+ fi
+ #
+])