Add the ability to find curl for mlogc.

apache2/build/find_curl.m4

@@ -0,0 +1,57 @@
+dnl Check for CURL Libraries
+dnl CHECK_CURL(ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND])
+dnl Sets:
+dnl  CURL_CFLAGS
+dnl  CURL_LIBS
+
+CURL_CONFIG="curl-config"
+CURL_CFLAGS=""
+CURL_LIBS=""
+
+AC_DEFUN([CHECK_CURL],
+[dnl
+
+AC_ARG_WITH(
+    curl,
+    [AC_HELP_STRING([--with-curl=PATH],[Path to the curl prefix])],
+    curl_path="$withval",
+    :)
+
+dnl # Determine curl lib directory
+if test -z "${curl_path}"; then
+    test_paths="/usr/local /usr"
+else
+    test_paths="${curl_path}"
+fi
+
+AC_MSG_CHECKING([for libcurl config script])
+for x in ${test_paths}; do
+    if test -e "${x}/bin/${CURL_CONFIG}"; then
+        with_curl="${x}/bin"
+        break
+    else
+        with_curl=""
+    fi
+done
+if test -n "${with_curl}"; then
+    CURL_CONFIG="${with_curl}/${CURL_CONFIG}"
+    AC_MSG_RESULT([${CURL_CONFIG}])
+    CURL_CFLAGS="`${CURL_CONFIG} --cflags`"
+    CURL_LIBS="`${CURL_CONFIG} --libs`"
+    CFLAGS=$save_CFLAGS
+    LDFLAGS=$save_LDFLAGS
+else
+    AC_MSG_RESULT([no])
+fi
+
+AC_SUBST(CURL_LIBS)
+AC_SUBST(CURL_CFLAGS)
+
+if test -z "${CURL_LIBS}"; then
+  AC_MSG_NOTICE([*** curl library not found.])
+  ifelse([$2], , AC_MSG_NOTICE([NOTE: curl library is required for building mlogc]), $2)
+else
+  AC_MSG_NOTICE([using '${CURL_LIBS}' for curl Library])
+  ifelse([$1], , , $1) 
+fi 
+])