diff options
| -rw-r--r-- | .cvsignore | 1 | ||||
| -rw-r--r-- | Makefile.am | 7 | ||||
| -rw-r--r-- | Makefile.inc | 3 | ||||
| -rw-r--r-- | acinclude.m4 | 162 | ||||
| -rw-r--r-- | ahost.c | 1 | ||||
| -rw-r--r-- | ares.h | 3 | ||||
| -rw-r--r-- | ares_build.h.dist | 234 | ||||
| -rw-r--r-- | ares_build.h.in | 99 | ||||
| -rw-r--r-- | ares_rules.h | 144 | ||||
| -rw-r--r-- | configure.ac | 6 | ||||
| -rw-r--r-- | setup.h | 34 |
11 files changed, 689 insertions, 5 deletions
@@ -6,6 +6,7 @@ Makefile.in aclocal.m4 adig ahost +ares_build.h ares_version.h.dist autom4te.cache config.guess diff --git a/Makefile.am b/Makefile.am index 7b61565..a2c32a6 100644 --- a/Makefile.am +++ b/Makefile.am @@ -46,7 +46,9 @@ noinst_PROGRAMS =$(PROGS) EXTRA_DIST = AUTHORS CHANGES README.cares Makefile.inc Makefile.dj \ Makefile.m32 Makefile.netware Makefile.vc6 $(man_MANS) $(MSVCFILES) \ config-win32.h RELEASE-NOTES libcares.pc.in buildconf get_ver.awk maketgz \ - TODO + TODO ares_build.h.in + +DISTCLEANFILES = ares_build.h pkgconfigdir = $(libdir)/pkgconfig pkgconfig_DATA = libcares.pc @@ -96,7 +98,8 @@ libcares_la_SOURCES = $(CSOURCES) $(HHEADERS) # where to install the c-ares headers libcares_ladir = $(includedir) # what headers to install on 'make install': -libcares_la_HEADERS = ares.h ares_version.h ares_dns.h +libcares_la_HEADERS = ares.h ares_version.h ares_dns.h \ + ares_build.h ares_rules.h ahost_SOURCES = ahost.c ares_getopt.c ares_getopt.h ahost_LDADD = $(top_builddir)/$(lib_LTLIBRARIES) diff --git a/Makefile.inc b/Makefile.inc index 07b71bd..586fe06 100644 --- a/Makefile.inc +++ b/Makefile.inc @@ -10,7 +10,8 @@ ares_parse_ns_reply.c ares_llist.c ares__timeval.c ares_strcasecmp.c HHEADERS = ares.h ares_private.h setup.h ares_dns.h ares_version.h \ nameser.h inet_net_pton.h inet_ntop.h ares_ipv6.h bitncmp.h setup_once.h \ - ares_llist.h ares_strdup.h ares_strcasecmp.h ares_writev.h + ares_llist.h ares_strdup.h ares_strcasecmp.h ares_writev.h ares_build.h \ + ares_rules.h MANPAGES= ares_destroy.3 ares_expand_name.3 ares_expand_string.3 ares_fds.3 \ ares_free_hostent.3 ares_free_string.3 ares_gethostbyaddr.3 \ diff --git a/acinclude.m4 b/acinclude.m4 index 790d1c7..8cadce1 100644 --- a/acinclude.m4 +++ b/acinclude.m4 @@ -1737,6 +1737,168 @@ AC_DEFUN([CURL_CHECK_LIBS_CLOCK_GETTIME_MONOTONIC], [ ]) +dnl CARES_DEFINE_UNQUOTED (VARIABLE, [VALUE]) +dnl ------------------------------------------------- +dnl Like AC_DEFINE_UNQUOTED this macro will define a C preprocessor +dnl symbol that can be further used in custom template configuration +dnl files. This macro, unlike AC_DEFINE_UNQUOTED, does not use a third +dnl argument for the description. Symbol definitions done with this +dnl macro are intended to be exclusively used in handcrafted *.h.in +dnl template files. Contrary to what AC_DEFINE_UNQUOTED does, this one +dnl prevents autoheader generation and insertion of symbol template +dnl stub and definition into the first configuration header file. Do +dnl not use this macro as a replacement for AC_DEFINE_UNQUOTED, each +dnl one serves different functional needs. + +AC_DEFUN([CARES_DEFINE_UNQUOTED], [ +cat >>confdefs.h <<_EOF +[@%:@define] $1 ifelse($#, 2, [$2], 1) +_EOF +]) + + +dnl CARES_CONFIGURE_LONG +dnl ------------------------------------------------- +dnl Find out the size of long as reported by sizeof() and define +dnl CARES_SIZEOF_LONG as appropriate to be used in template file +dnl ares_build.h.in to properly configure the library. +dnl The size of long is a build time characteristic and as such +dnl must be recorded in ares_build.h + +AC_DEFUN([CARES_CONFIGURE_LONG], [ + if test -z "$ac_cv_sizeof_long" || + test "$ac_cv_sizeof_long" -eq "0"; then + AC_MSG_ERROR([cannot find out size of long.]) + fi + CARES_DEFINE_UNQUOTED([CARES_SIZEOF_LONG], [$ac_cv_sizeof_long]) +]) + + +dnl CARES_CONFIGURE_ARES_SOCKLEN_T +dnl ------------------------------------------------- +dnl Find out suitable ares_socklen_t data type definition and size, making +dnl appropriate definitions for template file ares_build.h.in +dnl to properly configure and use the library. +dnl +dnl The need for the ares_socklen_t definition arises mainly to properly +dnl interface HP-UX systems which on one hand have a typedef'ed socklen_t +dnl data type which is 32 or 64-Bit wide depending on the data model being +dnl used, and that on the other hand is only actually used when interfacing +dnl the X/Open sockets provided in the xnet library. + +AC_DEFUN([CARES_CONFIGURE_ARES_SOCKLEN_T], [ + AC_REQUIRE([CARES_INCLUDES_WS2TCPIP])dnl + AC_REQUIRE([CARES_INCLUDES_SYS_SOCKET])dnl + AC_REQUIRE([CARES_PREPROCESS_CALLCONV])dnl + # + AC_MSG_CHECKING([for ares_socklen_t data type]) + cares_typeof_ares_socklen_t="unknown" + for arg1 in int SOCKET; do + for arg2 in 'struct sockaddr' void; do + for t in socklen_t int size_t 'unsigned int' long 'unsigned long' void; do + if test "$cares_typeof_ares_socklen_t" = "unknown"; then + AC_COMPILE_IFELSE([ + AC_LANG_PROGRAM([[ + $cares_includes_ws2tcpip + $cares_includes_sys_socket + $cares_preprocess_callconv + extern int FUNCALLCONV getpeername($arg1, $arg2 *, $t *); + ]],[[ + $t *lenptr = 0; + if(0 != getpeername(0, 0, lenptr)) + return 1; + ]]) + ],[ + cares_typeof_ares_socklen_t="$t" + ]) + fi + done + done + done + for t in socklen_t int; do + if test "$cares_typeof_ares_socklen_t" = "void"; then + AC_COMPILE_IFELSE([ + AC_LANG_PROGRAM([[ + $cares_includes_sys_socket + typedef $t ares_socklen_t; + ]],[[ + ares_socklen_t dummy; + ]]) + ],[ + cares_typeof_ares_socklen_t="$t" + ]) + fi + done + AC_MSG_RESULT([$cares_typeof_ares_socklen_t]) + if test "$cares_typeof_ares_socklen_t" = "void" || + test "$cares_typeof_ares_socklen_t" = "unknown"; then + AC_MSG_ERROR([cannot find data type for ares_socklen_t.]) + fi + # + AC_MSG_CHECKING([size of ares_socklen_t]) + cares_sizeof_ares_socklen_t="unknown" + cares_pull_headers_socklen_t="unknown" + if test "$ac_cv_header_ws2tcpip_h" = "yes"; then + tst_pull_header_checks='none ws2tcpip' + tst_size_checks='4' + else + tst_pull_header_checks='none systypes syssocket' + tst_size_checks='4 8 2' + fi + for tst_size in $tst_size_checks; do + for tst_pull_headers in $tst_pull_header_checks; do + if test "$cares_sizeof_ares_socklen_t" = "unknown"; then + case $tst_pull_headers in + ws2tcpip) + tmp_includes="$cares_includes_ws2tcpip" + ;; + systypes) + tmp_includes="$cares_includes_sys_types" + ;; + syssocket) + tmp_includes="$cares_includes_sys_socket" + ;; + *) + tmp_includes="" + ;; + esac + AC_COMPILE_IFELSE([ + AC_LANG_PROGRAM([[ + $tmp_includes + typedef $cares_typeof_ares_socklen_t ares_socklen_t; + typedef char dummy_arr[sizeof(ares_socklen_t) == $tst_size ? 1 : -1]; + ]],[[ + ares_socklen_t dummy; + ]]) + ],[ + cares_sizeof_ares_socklen_t="$tst_size" + cares_pull_headers_socklen_t="$tst_pull_headers" + ]) + fi + done + done + AC_MSG_RESULT([$cares_sizeof_ares_socklen_t]) + if test "$cares_sizeof_ares_socklen_t" = "unknown"; then + AC_MSG_ERROR([cannot find out size of ares_socklen_t.]) + fi + # + case $cares_pull_headers_socklen_t in + ws2tcpip) + CARES_DEFINE_UNQUOTED([CARES_PULL_WS2TCPIP_H]) + ;; + systypes) + CARES_DEFINE_UNQUOTED([CARES_PULL_SYS_TYPES_H]) + ;; + syssocket) + CARES_DEFINE_UNQUOTED([CARES_PULL_SYS_TYPES_H]) + CARES_DEFINE_UNQUOTED([CARES_PULL_SYS_SOCKET_H]) + ;; + esac + CARES_DEFINE_UNQUOTED([CARES_TYPEOF_ARES_SOCKLEN_T], [$cares_typeof_ares_socklen_t]) + CARES_DEFINE_UNQUOTED([CARES_SIZEOF_ARES_SOCKLEN_T], [$cares_sizeof_ares_socklen_t]) +]) + + dnl This macro determines if the specified struct exists in the specified file dnl Syntax: dnl CARES_CHECK_STRUCT(headers, struct name, if found, [if not found]) @@ -42,6 +42,7 @@ #include "inet_ntop.h" #include "inet_net_pton.h" #include "ares_getopt.h" +#include "ares_ipv6.h" #ifndef HAVE_STRDUP # include "ares_strdup.h" @@ -19,6 +19,9 @@ #ifndef ARES__H #define ARES__H +#include "ares_build.h" /* c-ares build definitions */ +#include "ares_rules.h" /* c-ares rules enforcement */ + /* * Define WIN32 when build target is Win32 API */ diff --git a/ares_build.h.dist b/ares_build.h.dist new file mode 100644 index 0000000..16a5cc5d --- /dev/null +++ b/ares_build.h.dist @@ -0,0 +1,234 @@ +#ifndef __CARES_BUILD_H +#define __CARES_BUILD_H + +/* $Id$ */ + +/* Copyright (C) 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. + */ + +/* ================================================================ */ +/* NOTES FOR CONFIGURE CAPABLE SYSTEMS */ +/* ================================================================ */ + +/* + * NOTE 1: + * ------- + * + * See file ares_build.h.in, run configure, and forget that this file + * exists it is only used for non-configure systems. + * But you can keep reading if you want ;-) + * + */ + +/* ================================================================ */ +/* NOTES FOR NON-CONFIGURE SYSTEMS */ +/* ================================================================ */ + +/* + * NOTE 1: + * ------- + * + * Nothing in this file is intended to be modified or adjusted by the + * c-ares library user nor by the c-ares library builder. + * + * If you think that something actually needs to be changed, adjusted + * or fixed in this file, then, report it on the c-ares development + * mailing list: http://cool.haxx.se/mailman/listinfo/c-ares/ + * + * Try to keep one section per platform, compiler and architecture, + * otherwise, if an existing section is reused for a different one and + * later on the original is adjusted, probably the piggybacking one can + * be adversely changed. + * + * In order to differentiate between platforms/compilers/architectures + * use only compiler built in predefined preprocessor symbols. + * + * This header file shall only export symbols which are 'cares' or 'CARES' + * prefixed, otherwise public name space would be polluted. + * + * NOTE 2: + * ------- + * + * Right now you might be staring at file ares_build.h.dist or ares_build.h, + * this is due to the following reason: file ares_build.h.dist is renamed + * to ares_build.h when the c-ares source code distribution archive file is + * created. + * + * File ares_build.h.dist is not included in the distribution archive. + * File ares_build.h is not present in the CVS tree. + * + * The distributed ares_build.h file is only intended to be used on systems + * which can not run the also distributed configure script. + * + * On systems capable of running the configure script, the configure process + * will overwrite the distributed ares_build.h file with one that is suitable + * and specific to the library being configured and built, which is generated + * from the ares_build.h.in template file. + * + * If you check out from CVS on a non-configure platform, you must run the + * appropriate buildconf* script to set up ares_build.h and other local files. + * + */ + +/* ================================================================ */ +/* DEFINITION OF THESE SYMBOLS SHALL NOT TAKE PLACE ANYWHERE ELSE */ +/* ================================================================ */ + +#ifdef CARES_SIZEOF_LONG +# error "CARES_SIZEOF_LONG shall not be defined except in ares_build.h" + Error Compilation_aborted_CARES_SIZEOF_LONG_already_defined +#endif + +#ifdef CARES_TYPEOF_ARES_SOCKLEN_T +# error "CARES_TYPEOF_ARES_SOCKLEN_T shall not be defined except in ares_build.h" + Error Compilation_aborted_CARES_TYPEOF_ARES_SOCKLEN_T_already_defined +#endif + +#ifdef CARES_SIZEOF_ARES_SOCKLEN_T +# error "CARES_SIZEOF_ARES_SOCKLEN_T shall not be defined except in ares_build.h" + Error Compilation_aborted_CARES_SIZEOF_ARES_SOCKLEN_T_already_defined +#endif + +/* ================================================================ */ +/* EXTERNAL INTERFACE SETTINGS FOR NON-CONFIGURE SYSTEMS ONLY */ +/* ================================================================ */ + +#if defined(__DJGPP__) || defined(__GO32__) +# define CARES_SIZEOF_LONG 4 +# define CARES_TYPEOF_ARES_SOCKLEN_T int +# define CARES_SIZEOF_ARES_SOCKLEN_T 4 + +#elif defined(__SALFORDC__) +# define CARES_SIZEOF_LONG 4 +# define CARES_TYPEOF_ARES_SOCKLEN_T FIXME +# define CARES_SIZEOF_ARES_SOCKLEN_T -1 + +#elif defined(__BORLANDC__) +# define CARES_SIZEOF_LONG 4 +# define CARES_TYPEOF_ARES_SOCKLEN_T FIXME +# define CARES_SIZEOF_ARES_SOCKLEN_T -1 + +#elif defined(__TURBOC__) +# define CARES_SIZEOF_LONG 4 +# define CARES_TYPEOF_ARES_SOCKLEN_T FIXME +# define CARES_SIZEOF_ARES_SOCKLEN_T -1 + +#elif defined(__WATCOMC__) +# define CARES_SIZEOF_LONG 4 +# define CARES_TYPEOF_ARES_SOCKLEN_T FIXME +# define CARES_SIZEOF_ARES_SOCKLEN_T -1 + +#elif defined(__POCC__) +# define CARES_SIZEOF_LONG 4 +# define CARES_TYPEOF_ARES_SOCKLEN_T FIXME +# define CARES_SIZEOF_ARES_SOCKLEN_T -1 + +#elif defined(__LCC__) +# define CARES_SIZEOF_LONG 4 +# define CARES_TYPEOF_ARES_SOCKLEN_T FIXME +# define CARES_SIZEOF_ARES_SOCKLEN_T -1 + +#elif defined(__SYMBIAN32__) +# define CARES_SIZEOF_LONG 4 +# define CARES_TYPEOF_ARES_SOCKLEN_T FIXME +# define CARES_SIZEOF_ARES_SOCKLEN_T -1 + +#elif defined(__MWERKS__) +# define CARES_SIZEOF_LONG 4 +# define CARES_TYPEOF_ARES_SOCKLEN_T FIXME +# define CARES_SIZEOF_ARES_SOCKLEN_T -1 + +#elif defined(_WIN32_WCE) +# define CARES_SIZEOF_LONG 4 +# define CARES_TYPEOF_ARES_SOCKLEN_T FIXME +# define CARES_SIZEOF_ARES_SOCKLEN_T -1 + +#elif defined(__MINGW32__) +# define CARES_SIZEOF_LONG 4 +# define CARES_TYPEOF_ARES_SOCKLEN_T FIXME +# define CARES_SIZEOF_ARES_SOCKLEN_T -1 + +#elif defined(__VMS) +# define CARES_SIZEOF_LONG 4 +# define CARES_TYPEOF_ARES_SOCKLEN_T FIXME +# define CARES_SIZEOF_ARES_SOCKLEN_T -1 + +#elif defined(__OS400__) +# if defined(__ILEC400__) +# define CARES_SIZEOF_LONG 4 +# define CARES_TYPEOF_ARES_SOCKLEN_T FIXME +# define CARES_SIZEOF_ARES_SOCKLEN_T -1 +# endif + +#elif defined(__MVS__) +# if defined(__IBMC__) || defined(__IBMCPP__) +# if defined(_ILP32) +# define CARES_SIZEOF_LONG 4 +# define CARES_TYPEOF_ARES_SOCKLEN_T FIXME +# define CARES_SIZEOF_ARES_SOCKLEN_T -1 +# elif defined(_LP64) +# define CARES_SIZEOF_LONG 8 +# define CARES_TYPEOF_ARES_SOCKLEN_T FIXME +# define CARES_SIZEOF_ARES_SOCKLEN_T -1 +# endif +# endif + +#elif defined(__370__) +# if defined(__IBMC__) || defined(__IBMCPP__) +# if defined(_ILP32) +# define CARES_SIZEOF_LONG 4 +# define CARES_TYPEOF_ARES_SOCKLEN_T FIXME +# define CARES_SIZEOF_ARES_SOCKLEN_T -1 +# elif defined(_LP64) +# define CARES_SIZEOF_LONG 8 +# define CARES_TYPEOF_ARES_SOCKLEN_T FIXME +# define CARES_SIZEOF_ARES_SOCKLEN_T -1 +# endif +# endif + +/* ===================================== */ +/* KEEP MSVC THE PENULTIMATE ENTRY */ +/* ===================================== */ + +#elif defined(_MSC_VER) +# define CARES_SIZEOF_LONG 4 +# define CARES_TYPEOF_ARES_SOCKLEN_T int +# define CARES_SIZEOF_ARES_SOCKLEN_T 4 + +/* ===================================== */ +/* KEEP GENERIC GCC THE LAST ENTRY */ +/* ===================================== */ + +#elif defined(__GNUC__) +# if defined(__i386__) || defined(__ppc__) +# define CARES_SIZEOF_LONG 4 +# define CARES_TYPEOF_ARES_SOCKLEN_T FIXME +# define CARES_SIZEOF_ARES_SOCKLEN_T -1 +# elif defined(__x86_64__) || defined(__ppc64__) +# define CARES_SIZEOF_LONG 8 +# define CARES_TYPEOF_ARES_SOCKLEN_T FIXME +# define CARES_SIZEOF_ARES_SOCKLEN_T -1 +# endif + +#else +# error "Unknown non-configure build target!" + Error Compilation_aborted_Unknown_non_configure_build_target +#endif + +/* Data type definition of ares_socklen_t. */ + +#ifdef CARES_TYPEOF_ARES_SOCKLEN_T + typedef CARES_TYPEOF_ARES_SOCKLEN_T ares_socklen_t; +#endif + +#endif /* __CARES_BUILD_H */ diff --git a/ares_build.h.in b/ares_build.h.in new file mode 100644 index 0000000..21ef2fe --- /dev/null +++ b/ares_build.h.in @@ -0,0 +1,99 @@ +#ifndef __CARES_BUILD_H +#define __CARES_BUILD_H + +/* $Id$ */ + +/* Copyright (C) 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. + */ + +/* ================================================================ */ +/* NOTES FOR CONFIGURE CAPABLE SYSTEMS */ +/* ================================================================ */ + +/* + * NOTE 1: + * ------- + * + * Nothing in this file is intended to be modified or adjusted by the + * c-ares library user nor by the c-ares library builder. + * + * If you think that something actually needs to be changed, adjusted + * or fixed in this file, then, report it on the c-ares development + * mailing list: http://cool.haxx.se/mailman/listinfo/c-ares/ + * + * This header file shall only export symbols which are 'cares' or 'CARES' + * prefixed, otherwise public name space would be polluted. + * + * NOTE 2: + * ------- + * + * Right now you might be staring at file ares_build.h.in or ares_build.h, + * this is due to the following reason: + * + * On systems capable of running the configure script, the configure process + * will overwrite the distributed ares_build.h file with one that is suitable + * and specific to the library being configured and built, which is generated + * from the ares_build.h.in template file. + * + */ + +/* ================================================================ */ +/* DEFINITION OF THESE SYMBOLS SHALL NOT TAKE PLACE ANYWHERE ELSE */ +/* ================================================================ */ + +#ifdef CARES_SIZEOF_LONG +# error "CARES_SIZEOF_LONG shall not be defined except in ares_build.h" + Error Compilation_aborted_CARES_SIZEOF_LONG_already_defined +#endif + +#ifdef CARES_TYPEOF_ARES_SOCKLEN_T +# error "CARES_TYPEOF_ARES_SOCKLEN_T shall not be defined except in ares_build.h" + Error Compilation_aborted_CARES_TYPEOF_ARES_SOCKLEN_T_already_defined +#endif + +#ifdef CARES_SIZEOF_ARES_SOCKLEN_T +# error "CARES_SIZEOF_ARES_SOCKLEN_T shall not be defined except in ares_build.h" + Error Compilation_aborted_CARES_SIZEOF_ARES_SOCKLEN_T_already_defined +#endif + +/* ================================================================ */ +/* EXTERNAL INTERFACE SETTINGS FOR CONFIGURE CAPABLE SYSTEMS ONLY */ +/* ================================================================ */ + +/* Configure process defines this to 1 when it finds out that system */ +/* header file sys/types.h must be included by the external interface. */ +#undef CARES_PULL_SYS_TYPES_H +#ifdef CARES_PULL_SYS_TYPES_H +# include <sys/types.h> +#endif + +/* Configure process defines this to 1 when it finds out that system */ +/* header file sys/socket.h must be included by the external interface. */ +#undef CARES_PULL_SYS_SOCKET_H +#ifdef CARES_PULL_SYS_SOCKET_H +# include <sys/socket.h> +#endif + +/* The size of `long', as computed by sizeof. */ +#undef CARES_SIZEOF_LONG + +/* Integral data type used for ares_socklen_t. */ +#undef CARES_TYPEOF_ARES_SOCKLEN_T + +/* The size of `ares_socklen_t', as computed by sizeof. */ +#undef CARES_SIZEOF_ARES_SOCKLEN_T + +/* Data type definition of ares_socklen_t. */ +typedef CARES_TYPEOF_ARES_SOCKLEN_T ares_socklen_t; + +#endif /* __CARES_BUILD_H */ diff --git a/ares_rules.h b/ares_rules.h new file mode 100644 index 0000000..95751b0 --- /dev/null +++ b/ares_rules.h @@ -0,0 +1,144 @@ +#ifndef __CARES_RULES_H +#define __CARES_RULES_H + +/* $Id$ */ + +/* Copyright (C) 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. + */ + +/* ================================================================ */ +/* COMPILE TIME SANITY CHECKS */ +/* ================================================================ */ + +/* + * NOTE 1: + * ------- + * + * All checks done in this file are intentionally placed in a public + * header file which is pulled by ares.h when an application is + * being built using an already built c-ares library. Additionally + * this file is also included and used when building the library. + * + * If compilation fails on this file it is certainly sure that the + * problem is elsewhere. It could be a problem in the ares_build.h + * header file, or simply that you are using different compilation + * settings than those used to build the library. + * + * Nothing in this file is intended to be modified or adjusted by the + * c-ares library user nor by the c-ares library builder. + * + * Do not deactivate any check, these are done to make sure that the + * library is properly built and used. + * + * You can find further help on the c-ares development mailing list: + * http://cool.haxx.se/mailman/listinfo/c-ares/ + * + * NOTE 2 + * ------ + * + * Some of the following compile time checks are based on the fact + * that the dimension of a constant array can not be a negative one. + * In this way if the compile time verification fails, the compilation + * will fail issuing an error. The error description wording is compiler + * dependant but it will be quite similar to one of the following: + * + * "negative subscript or subscript is too large" + * "array must have at least one element" + * "-1 is an illegal array size" + * "size of array is negative" + * + * If you are building an application which tries to use an already + * built c-ares library and you are getting this kind of errors on + * this file, it is a clear indication that there is a mismatch between + * how the library was built and how you are trying to use it for your + * application. Your already compiled or binary library provider is the + * only one who can give you the details you need to properly use it. + */ + +/* + * Verify that some macros are actually defined. + */ + +#ifndef CARES_SIZEOF_LONG +# error "CARES_SIZEOF_LONG definition is missing!" + Error Compilation_aborted_CARES_SIZEOF_LONG_is_missing +#endif + +#ifndef CARES_TYPEOF_ARES_SOCKLEN_T +# error "CARES_TYPEOF_ARES_SOCKLEN_T definition is missing!" + Error Compilation_aborted_CARES_TYPEOF_ARES_SOCKLEN_T_is_missing +#endif + +#ifndef CARES_SIZEOF_ARES_SOCKLEN_T +# error "CARES_SIZEOF_ARES_SOCKLEN_T definition is missing!" + Error Compilation_aborted_CARES_SIZEOF_ARES_SOCKLEN_T_is_missing +#endif + +/* + * Macros private to this header file. + */ + +#define CareschkszEQ(t, s) sizeof(t) == s ? 1 : -1 + +#define CareschkszGE(t1, t2) sizeof(t1) >= sizeof(t2) ? 1 : -1 + +/* + * Verify that the size previously defined and expected for long + * is the same as the one reported by sizeof() at compile time. + */ + +typedef char + __cares_rule_01__ + [CareschkszEQ(long, CARES_SIZEOF_LONG)]; + +/* + * Verify that the size previously defined and expected for + * ares_socklen_t is actually the the same as the one reported + * by sizeof() at compile time. + */ + +typedef char + __cares_rule_02__ + [CareschkszEQ(ares_socklen_t, CARES_SIZEOF_ARES_SOCKLEN_T)]; + +/* + * Verify at compile time that the size of ares_socklen_t as reported + * by sizeof() is greater or equal than the one reported for int for + * the current compilation. + */ + +typedef char + __cares_rule_03__ + [CareschkszGE(ares_socklen_t, int)]; + +/* ================================================================ */ +/* EXTERNALLY AND INTERNALLY VISIBLE DEFINITIONS */ +/* ================================================================ */ + +/* + * Get rid of macros private to this header file. + */ + +#undef CareschkszEQ +#undef CareschkszGE + +/* + * Get rid of macros not intended to exist beyond this point. + */ + +#undef CARES_PULL_SYS_TYPES_H +#undef CARES_PULL_SYS_SOCKET_H + +#undef CARES_TYPEOF_ARES_SOCKLEN_T + +#endif /* __CARES_RULES_H */ diff --git a/configure.ac b/configure.ac index aca5e94..8482f1a 100644 --- a/configure.ac +++ b/configure.ac @@ -7,7 +7,7 @@ AC_INIT([c-ares], [-], CARES_OVERRIDE_AUTOCONF AC_CONFIG_SRCDIR([ares_ipv6.h]) -AM_CONFIG_HEADER([config.h]) +AM_CONFIG_HEADER([config.h ares_build.h]) AM_MAINTAINER_MODE CARES_CHECK_OPTION_DEBUG @@ -489,7 +489,9 @@ AC_HEADER_TIME CURL_CHECK_STRUCT_TIMEVAL AC_CHECK_SIZEOF(size_t) +AC_CHECK_SIZEOF(int) AC_CHECK_SIZEOF(long) +CARES_CONFIGURE_LONG AC_CHECK_SIZEOF(time_t) AC_CHECK_TYPE(long long, @@ -525,6 +527,8 @@ AC_CHECK_TYPE([bool],[ #endif ]) +CARES_CONFIGURE_ARES_SOCKLEN_T + # Check for socklen_t or equivalent CURL_CHECK_TYPE_SOCKLEN_T @@ -3,7 +3,7 @@ /* $Id$ */ -/* Copyright (C) 2004 - 2008 by Daniel Stenberg et al +/* Copyright (C) 2004 - 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 @@ -39,6 +39,15 @@ #endif /* HAVE_CONFIG_H */ +/* ================================================================ */ +/* Definition of preprocessor macros/symbols which modify compiler */ +/* behaviour or generated code characteristics must be done here, */ +/* as appropriate, before any system header file is included. It is */ +/* also possible to have them defined in the config file included */ +/* before this point. As a result of all this we frown inclusion of */ +/* system header files in our config files, avoid this at any cost. */ +/* ================================================================ */ + /* * Tru64 needs _REENTRANT set for a few function prototypes and * things to appear in the system header files. Unixware needs it @@ -51,6 +60,29 @@ # endif #endif +/* ================================================================ */ +/* If you need to include a system header file for your platform, */ +/* please, do it beyond the point further indicated in this file. */ +/* ================================================================ */ + +/* + * c-ares external interface definitions are also used internally, + * and might also include required system header files to define them. + */ + +#include <ares_build.h> + +/* + * Compile time sanity checks must also be done when building the library. + */ + +#include <ares_rules.h> + +/* ================================================================ */ +/* No system header file shall be included in this file before this */ +/* point. The only allowed ones are those included from curlbuild.h */ +/* ================================================================ */ + /* * Include header files for windows builds before redefining anything. * Use this preproessor block only to include or exclude windows.h, |