AC_CHECK_CURL(version, action-if, action-not)
check for curl of sufficient version by looking at curl-config
Akos Maroy <firstname.lastname@example.org>
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cryp.to ac-archive's Installed Packages (released)
Defines CURL_LIBS, CURL_CFLAGS. See curl-config(1) man page.
if test -z "$CURL_CONFIG"; then
AC_PATH_PROG(CURL_CONFIG, curl-config, no)
if test "$CURL_CONFIG" = "no" ; then
echo "*** The curl-config script could not be found. Make sure it is"
echo "*** in your path, and that curl is properly installed."
echo "*** Or see http://curl.haxx.se/"
dnl curl-config --version returns "libcurl <version>", thus cut the number
CURL_VERSION=`$CURL_CONFIG --version | cut -d" " -f2`
AC_MSG_CHECKING(for curl >= $1)
VERSION_CHECK=`expr $CURL_VERSION \>\= $1`
if test "$VERSION_CHECK" = "1" ; then
## If we have a custom action on failure, don't print errors, but
## do set a variable so people can do so.
ifelse([$3], ,echo "can't find curl >= $1",)
if test $succeeded = yes; then
ifelse([$2], , :, [$2])
ifelse([$3], , AC_MSG_ERROR([Library requirements (curl) not met.]), [$3])