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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
59 AC_ARG_WITH(libcurl,
60 AC_HELP_STRING([--with-libcurl=DIR],[look for the curl library in DIR]),
61 [_libcurl_with=$withval],[_libcurl_with=ifelse([$1],,[yes],[$1])])
62
63 if test "$_libcurl_with" != "no" ; then
64
65 AC_PROG_AWK
66
67 _libcurl_version_parse="eval $AWK '{split(\$NF,A,\".\"); X=256*256*A[[1]]+256*A[[2]]+A[[3]]; print X;}'"
68
69 _libcurl_try_link=yes
70
71 if test -d "$_libcurl_with" ; then
72 LIBCURL_CPPFLAGS="-I$withval/include"
73 _libcurl_ldflags="-L$withval/lib"
74 AC_PATH_PROG([_libcurl_config],["$withval/bin/curl-config"])
75 else
76 AC_PATH_PROG([_libcurl_config],[curl-config])
77 fi
78
79 if test x$_libcurl_config != "x" ; then
80 AC_CACHE_CHECK([for the version of libcurl],
81 [libcurl_cv_lib_curl_version],
82 [libcurl_cv_lib_curl_version=`$_libcurl_config --version | $AWK '{print $[]2}'`])
83
84 _libcurl_version=`echo $libcurl_cv_lib_curl_version | $_libcurl_version_parse`
85 _libcurl_wanted=`echo ifelse([$2],,[0],[$2]) | $_libcurl_version_parse`
86
87 if test $_libcurl_wanted -gt 0 ; then
88 AC_CACHE_CHECK([for libcurl >= version $2],
89 [libcurl_cv_lib_version_ok],
90 [
91 if test $_libcurl_version -ge $_libcurl_wanted ; then
92 libcurl_cv_lib_version_ok=yes
93 else
94 libcurl_cv_lib_version_ok=no
95 fi
96 ])
97 fi
98
99 if test $_libcurl_wanted -eq 0 || test x$libcurl_cv_lib_version_ok = xyes ; then
100 if test x"$LIBCURL_CPPFLAGS" = "x" ; then
101 LIBCURL_CPPFLAGS=`$_libcurl_config --cflags`
102 fi
103 if test x"$LIBCURL" = "x" ; then
104 LIBCURL=`$_libcurl_config --libs`
105
106 # This is so silly, but Apple actually has a bug in their
107 # curl-config script. Fixed in Tiger, but there are still
108 # lots of Panther installs around.
109 case "${host}" in
110 powerpc-apple-darwin7*)
111 LIBCURL=`echo $LIBCURL | sed -e 's|-arch i386||g'`
112 ;;
113 esac
114 fi
115
116 # All curl-config scripts support --feature
117 _libcurl_features=`$_libcurl_config --feature`
118
119 # Is it modern enough to have --protocols? (7.12.4)
120 if test $_libcurl_version -ge 461828 ; then
121 _libcurl_protocols=`$_libcurl_config --protocols`
122 fi
123 else
124 _libcurl_try_link=no
125 fi
126
127 unset _libcurl_wanted
128 fi
129
130 if test $_libcurl_try_link = yes ; then
131
132 # we didn't find curl-config, so let's see if the user-supplied
133 # link line (or failing that, "-lcurl") is enough.
134 LIBCURL=${LIBCURL-"$_libcurl_ldflags -lcurl"}
135
136 AC_CACHE_CHECK([whether libcurl is usable],
137 [libcurl_cv_lib_curl_usable],
138 [
139 _libcurl_save_cppflags=$CPPFLAGS
140 CPPFLAGS="$LIBCURL_CPPFLAGS $CPPFLAGS"
141 _libcurl_save_libs=$LIBS
142 LIBS="$LIBCURL $LIBS"
143
144 AC_LINK_IFELSE(AC_LANG_PROGRAM([#include <curl/curl.h>],[
145/* Try and use a few common options to force a failure if we are
146 missing symbols or can't link. */
147int x;
148curl_easy_setopt(NULL,CURLOPT_URL,NULL);
149x=CURL_ERROR_SIZE;
150x=CURLOPT_WRITEFUNCTION;
151x=CURLOPT_FILE;
152x=CURLOPT_ERRORBUFFER;
153x=CURLOPT_STDERR;
154x=CURLOPT_VERBOSE;
155]),libcurl_cv_lib_curl_usable=yes,libcurl_cv_lib_curl_usable=no)
156
157 CPPFLAGS=$_libcurl_save_cppflags
158 LIBS=$_libcurl_save_libs
159 unset _libcurl_save_cppflags
160 unset _libcurl_save_libs
161 ])
162
163 if test $libcurl_cv_lib_curl_usable = yes ; then
164
165 # Does curl_free() exist in this version of libcurl?
166 # If not, fake it with free()
167
168 _libcurl_save_cppflags=$CPPFLAGS
169 CPPFLAGS="$CPPFLAGS $LIBCURL_CPPFLAGS"
170 _libcurl_save_libs=$LIBS
171 LIBS="$LIBS $LIBCURL"
172
173 AC_CHECK_FUNC(curl_free,,
174 AC_DEFINE(curl_free,free,
175 [Define curl_free() as free() if our version of curl lacks curl_free.]))
176
177 CPPFLAGS=$_libcurl_save_cppflags
178 LIBS=$_libcurl_save_libs
179 unset _libcurl_save_cppflags
180 unset _libcurl_save_libs
181
182 AC_DEFINE(HAVE_LIBCURL,1,
183 [Define to 1 if you have a functional curl library.])
184 AC_SUBST(LIBCURL_CPPFLAGS)
185 AC_SUBST(LIBCURL)
186
187 for _libcurl_feature in $_libcurl_features ; do
188 AC_DEFINE_UNQUOTED(AS_TR_CPP(libcurl_feature_$_libcurl_feature),[1])
189 eval AS_TR_SH(libcurl_feature_$_libcurl_feature)=yes
190 done
191
192 if test "x$_libcurl_protocols" = "x" ; then
193
194 # We don't have --protocols, so just assume that all
195 # protocols are available
196 _libcurl_protocols="HTTP FTP FILE TELNET LDAP DICT"
197
198 if test x$libcurl_feature_SSL = xyes ; then
199 _libcurl_protocols="$_libcurl_protocols HTTPS"
200
201 # FTPS wasn't standards-compliant until version
202 # 7.11.0
203 if test $_libcurl_version -ge 461568; then
204 _libcurl_protocols="$_libcurl_protocols FTPS"
205 fi
206 fi
207 fi
208
209 for _libcurl_protocol in $_libcurl_protocols ; do
210 AC_DEFINE_UNQUOTED(AS_TR_CPP(libcurl_protocol_$_libcurl_protocol),[1])
211 eval AS_TR_SH(libcurl_protocol_$_libcurl_protocol)=yes
212 done
213 else
214 unset LIBCURL
215 unset LIBCURL_CPPFLAGS
216 fi
217 fi
218
219 unset _libcurl_try_link
220 unset _libcurl_version_parse
221 unset _libcurl_config
222 unset _libcurl_feature
223 unset _libcurl_features
224 unset _libcurl_protocol
225 unset _libcurl_protocols
226 unset _libcurl_version
227 unset _libcurl_ldflags
228 fi
229
230 if test x$_libcurl_with = xno || test x$libcurl_cv_lib_curl_usable != xyes ; then
231 # This is the IF-NO path
232 ifelse([$4],,:,[$4])
233 else
234 # This is the IF-YES path
235 ifelse([$3],,:,[$3])
236 fi
237
238 unset _libcurl_with
239])dnl