diff options
Diffstat (limited to 'm4/cares-reentrant.m4')
| -rw-r--r-- | m4/cares-reentrant.m4 | 611 |
1 files changed, 611 insertions, 0 deletions
diff --git a/m4/cares-reentrant.m4 b/m4/cares-reentrant.m4 new file mode 100644 index 0000000..052326b --- /dev/null +++ b/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 + # +]) |