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