1#***************************************************************************
2#                                  _   _ ____  _
3#  Project                     ___| | | |  _ \| |
4#                             / __| | | | |_) | |
5#                            | (__| |_| |  _ <| |___
6#                             \___|\___/|_| \_\_____|
7#
8# Copyright (C) 2006, David Shaw <dshaw@jabberwocky.com>
9#
10# This software is licensed as described in the file COPYING, which
11# you should have received as part of this distribution. The terms
12# are also available at https://curl.haxx.se/docs/copyright.html.
13#
14# You may opt to use, copy, modify, merge, publish, distribute and/or sell
15# copies of the Software, and permit persons to whom the Software is
16# furnished to do so, under the terms of the COPYING file.
17#
18# This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19# KIND, either express or implied.
20#
21###########################################################################
22# LIBCURL_CHECK_CONFIG ([DEFAULT-ACTION], [MINIMUM-VERSION],
23#                       [ACTION-IF-YES], [ACTION-IF-NO])
24# ----------------------------------------------------------
25#      David Shaw <dshaw@jabberwocky.com>   May-09-2006
26#
27# Checks for libcurl.  DEFAULT-ACTION is the string yes or no to
28# specify whether to default to --with-libcurl or --without-libcurl.
29# If not supplied, DEFAULT-ACTION is yes.  MINIMUM-VERSION is the
30# minimum version of libcurl to accept.  Pass the version as a regular
31# version number like 7.10.1. If not supplied, any version is
32# accepted.  ACTION-IF-YES is a list of shell commands to run if
33# libcurl was successfully found and passed the various tests.
34# ACTION-IF-NO is a list of shell commands that are run otherwise.
35# Note that using --without-libcurl does run ACTION-IF-NO.
36#
37# This macro #defines HAVE_LIBCURL if a working libcurl setup is
38# found, and sets @LIBCURL@ and @LIBCURL_CPPFLAGS@ to the necessary
39# values.  Other useful defines are LIBCURL_FEATURE_xxx where xxx are
40# the various features supported by libcurl, and LIBCURL_PROTOCOL_yyy
41# where yyy are the various protocols supported by libcurl.  Both xxx
42# and yyy are capitalized.  See the list of AH_TEMPLATEs at the top of
43# the macro for the complete list of possible defines.  Shell
44# variables $libcurl_feature_xxx and $libcurl_protocol_yyy are also
45# defined to 'yes' for those features and protocols that were found.
46# Note that xxx and yyy keep the same capitalization as in the
47# curl-config list (e.g. it's "HTTP" and not "http").
48#
49# Users may override the detected values by doing something like:
50# LIBCURL="-lcurl" LIBCURL_CPPFLAGS="-I/usr/myinclude" ./configure
51#
52# For the sake of sanity, this macro assumes that any libcurl that is
53# found is after version 7.7.2, the first version that included the
54# curl-config script.  Note that it is very important for people
55# packaging binary versions of libcurl to include this script!
56# Without curl-config, we can only guess what protocols are available,
57# or use curl_version_info to figure it out at runtime.
58
59AC_DEFUN([LIBCURL_CHECK_CONFIG],
60[
61  AH_TEMPLATE([LIBCURL_FEATURE_SSL],[Defined if libcurl supports SSL])
62  AH_TEMPLATE([LIBCURL_FEATURE_KRB4],[Defined if libcurl supports KRB4])
63  AH_TEMPLATE([LIBCURL_FEATURE_IPV6],[Defined if libcurl supports IPv6])
64  AH_TEMPLATE([LIBCURL_FEATURE_LIBZ],[Defined if libcurl supports libz])
65  AH_TEMPLATE([LIBCURL_FEATURE_ASYNCHDNS],[Defined if libcurl supports AsynchDNS])
66  AH_TEMPLATE([LIBCURL_FEATURE_IDN],[Defined if libcurl supports IDN])
67  AH_TEMPLATE([LIBCURL_FEATURE_SSPI],[Defined if libcurl supports SSPI])
68  AH_TEMPLATE([LIBCURL_FEATURE_NTLM],[Defined if libcurl supports NTLM])
69
70  AH_TEMPLATE([LIBCURL_PROTOCOL_HTTP],[Defined if libcurl supports HTTP])
71  AH_TEMPLATE([LIBCURL_PROTOCOL_HTTPS],[Defined if libcurl supports HTTPS])
72  AH_TEMPLATE([LIBCURL_PROTOCOL_FTP],[Defined if libcurl supports FTP])
73  AH_TEMPLATE([LIBCURL_PROTOCOL_FTPS],[Defined if libcurl supports FTPS])
74  AH_TEMPLATE([LIBCURL_PROTOCOL_FILE],[Defined if libcurl supports FILE])
75  AH_TEMPLATE([LIBCURL_PROTOCOL_TELNET],[Defined if libcurl supports TELNET])
76  AH_TEMPLATE([LIBCURL_PROTOCOL_LDAP],[Defined if libcurl supports LDAP])
77  AH_TEMPLATE([LIBCURL_PROTOCOL_DICT],[Defined if libcurl supports DICT])
78  AH_TEMPLATE([LIBCURL_PROTOCOL_TFTP],[Defined if libcurl supports TFTP])
79  AH_TEMPLATE([LIBCURL_PROTOCOL_RTSP],[Defined if libcurl supports RTSP])
80  AH_TEMPLATE([LIBCURL_PROTOCOL_POP3],[Defined if libcurl supports POP3])
81  AH_TEMPLATE([LIBCURL_PROTOCOL_IMAP],[Defined if libcurl supports IMAP])
82  AH_TEMPLATE([LIBCURL_PROTOCOL_SMTP],[Defined if libcurl supports SMTP])
83
84  AC_ARG_WITH(libcurl,
85     AS_HELP_STRING([--with-libcurl=PREFIX],[look for the curl library in PREFIX/lib and headers in PREFIX/include]),
86     [_libcurl_with=$withval],[_libcurl_with=ifelse([$1],,[yes],[$1])])
87
88  if test "$_libcurl_with" != "no" ; then
89
90     AC_PROG_AWK
91
92     _libcurl_version_parse="eval $AWK '{split(\$NF,A,\".\"); X=256*256*A[[1]]+256*A[[2]]+A[[3]]; print X;}'"
93
94     _libcurl_try_link=yes
95
96     if test -d "$_libcurl_with" ; then
97        LIBCURL_CPPFLAGS="-I$withval/include"
98        _libcurl_ldflags="-L$withval/lib"
99        AC_PATH_PROG([_libcurl_config],[curl-config],[],
100                     ["$withval/bin"])
101     else
102        AC_PATH_PROG([_libcurl_config],[curl-config],[],[$PATH])
103     fi
104
105     if test x$_libcurl_config != "x" ; then
106        AC_CACHE_CHECK([for the version of libcurl],
107           [libcurl_cv_lib_curl_version],
108           [libcurl_cv_lib_curl_version=`$_libcurl_config --version | $AWK '{print $[]2}'`])
109
110        _libcurl_version=`echo $libcurl_cv_lib_curl_version | $_libcurl_version_parse`
111        _libcurl_wanted=`echo ifelse([$2],,[0],[$2]) | $_libcurl_version_parse`
112
113        if test $_libcurl_wanted -gt 0 ; then
114           AC_CACHE_CHECK([for libcurl >= version $2],
115              [libcurl_cv_lib_version_ok],
116              [
117              if test $_libcurl_version -ge $_libcurl_wanted ; then
118                 libcurl_cv_lib_version_ok=yes
119              else
120                 libcurl_cv_lib_version_ok=no
121              fi
122              ])
123        fi
124
125        if test $_libcurl_wanted -eq 0 || test x$libcurl_cv_lib_version_ok = xyes ; then
126           if test x"$LIBCURL_CPPFLAGS" = "x" ; then
127              LIBCURL_CPPFLAGS=`$_libcurl_config --cflags`
128           fi
129           if test x"$LIBCURL" = "x" ; then
130              LIBCURL=`$_libcurl_config --libs`
131
132              # This is so silly, but Apple actually has a bug in their
133              # curl-config script.  Fixed in Tiger, but there are still
134              # lots of Panther installs around.
135              case "${host}" in
136                 powerpc-apple-darwin7*)
137                    LIBCURL=`echo $LIBCURL | sed -e 's|-arch i386||g'`
138                 ;;
139              esac
140           fi
141
142           # All curl-config scripts support --feature
143           _libcurl_features=`$_libcurl_config --feature`
144
145           # Is it modern enough to have --protocols? (7.12.4)
146           if test $_libcurl_version -ge 461828 ; then
147              _libcurl_protocols=`$_libcurl_config --protocols`
148           fi
149        else
150           _libcurl_try_link=no
151        fi
152
153        unset _libcurl_wanted
154     fi
155
156     if test $_libcurl_try_link = yes ; then
157
158        # we didn't find curl-config, so let's see if the user-supplied
159        # link line (or failing that, "-lcurl") is enough.
160        LIBCURL=${LIBCURL-"$_libcurl_ldflags -lcurl"}
161
162        AC_CACHE_CHECK([whether libcurl is usable],
163           [libcurl_cv_lib_curl_usable],
164           [
165           _libcurl_save_cppflags=$CPPFLAGS
166           CPPFLAGS="$LIBCURL_CPPFLAGS $CPPFLAGS"
167           _libcurl_save_libs=$LIBS
168           LIBS="$LIBCURL $LIBS"
169
170           AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <curl/curl.h>]],[[
171/* Try and use a few common options to force a failure if we are
172   missing symbols or can't link. */
173int x;
174curl_easy_setopt(NULL,CURLOPT_URL,NULL);
175x=CURL_ERROR_SIZE;
176x=CURLOPT_WRITEFUNCTION;
177x=CURLOPT_WRITEDATA;
178x=CURLOPT_ERRORBUFFER;
179x=CURLOPT_STDERR;
180x=CURLOPT_VERBOSE;
181if (x) {;}
182]])],libcurl_cv_lib_curl_usable=yes,libcurl_cv_lib_curl_usable=no)
183
184           CPPFLAGS=$_libcurl_save_cppflags
185           LIBS=$_libcurl_save_libs
186           unset _libcurl_save_cppflags
187           unset _libcurl_save_libs
188           ])
189
190        if test $libcurl_cv_lib_curl_usable = yes ; then
191
192           # Does curl_free() exist in this version of libcurl?
193           # If not, fake it with free()
194
195           _libcurl_save_cppflags=$CPPFLAGS
196           CPPFLAGS="$CPPFLAGS $LIBCURL_CPPFLAGS"
197           _libcurl_save_libs=$LIBS
198           LIBS="$LIBS $LIBCURL"
199
200           AC_CHECK_FUNC(curl_free,,
201              AC_DEFINE(curl_free,free,
202                [Define curl_free() as free() if our version of curl lacks curl_free.]))
203
204           CPPFLAGS=$_libcurl_save_cppflags
205           LIBS=$_libcurl_save_libs
206           unset _libcurl_save_cppflags
207           unset _libcurl_save_libs
208
209           AC_DEFINE(HAVE_LIBCURL,1,
210             [Define to 1 if you have a functional curl library.])
211           AC_SUBST(LIBCURL_CPPFLAGS)
212           AC_SUBST(LIBCURL)
213
214           for _libcurl_feature in $_libcurl_features ; do
215              AC_DEFINE_UNQUOTED(AS_TR_CPP(libcurl_feature_$_libcurl_feature),[1])
216              eval AS_TR_SH(libcurl_feature_$_libcurl_feature)=yes
217           done
218
219           if test "x$_libcurl_protocols" = "x" ; then
220
221              # We don't have --protocols, so just assume that all
222              # protocols are available
223              _libcurl_protocols="HTTP FTP FILE TELNET LDAP DICT TFTP"
224
225              if test x$libcurl_feature_SSL = xyes ; then
226                 _libcurl_protocols="$_libcurl_protocols HTTPS"
227
228                 # FTPS wasn't standards-compliant until version
229                 # 7.11.0 (0x070b00 == 461568)
230                 if test $_libcurl_version -ge 461568; then
231                    _libcurl_protocols="$_libcurl_protocols FTPS"
232                 fi
233              fi
234
235              # RTSP, IMAP, POP3 and SMTP were added in
236              # 7.20.0 (0x071400 == 463872)
237              if test $_libcurl_version -ge 463872; then
238                 _libcurl_protocols="$_libcurl_protocols RTSP IMAP POP3 SMTP"
239              fi
240           fi
241
242           for _libcurl_protocol in $_libcurl_protocols ; do
243              AC_DEFINE_UNQUOTED(AS_TR_CPP(libcurl_protocol_$_libcurl_protocol),[1])
244              eval AS_TR_SH(libcurl_protocol_$_libcurl_protocol)=yes
245           done
246        else
247           unset LIBCURL
248           unset LIBCURL_CPPFLAGS
249        fi
250     fi
251
252     unset _libcurl_try_link
253     unset _libcurl_version_parse
254     unset _libcurl_config
255     unset _libcurl_feature
256     unset _libcurl_features
257     unset _libcurl_protocol
258     unset _libcurl_protocols
259     unset _libcurl_version
260     unset _libcurl_ldflags
261  fi
262
263  if test x$_libcurl_with = xno || test x$libcurl_cv_lib_curl_usable != xyes ; then
264     # This is the IF-NO path
265     ifelse([$4],,:,[$4])
266  else
267     # This is the IF-YES path
268     ifelse([$3],,:,[$3])
269  fi
270
271  unset _libcurl_with
272])dnl
273