FindXMLRPC: Tolerate no include directories
`xmlrpc-c-config $modules --cflags` may report no `-I` flags if the
headers are in a standard location like `/usr/include`. In this case
it is okay for `XMLRPC_INCLUDE_DIRS` to be empty.
Ideally the `--cflags` output should be used as hints for a `find_path`
call to really find the headers as we do for other find modules, but
simply assuming no explicit include directories are needed is good
enough for now.
Fixes: #17347
diff --git a/Modules/FindXMLRPC.cmake b/Modules/FindXMLRPC.cmake
index d857382..e7ae919 100644
--- a/Modules/FindXMLRPC.cmake
+++ b/Modules/FindXMLRPC.cmake
@@ -57,6 +57,7 @@
XMLRPC_C_CONFIG_CFLAGS "${XMLRPC_C_CONFIG_CFLAGS}")
# Look for -I options.
+ # FIXME: Use these as hints to a find_path call to find the headers.
set(XMLRPC_INCLUDE_DIRS)
foreach(flag ${XMLRPC_C_CONFIG_CFLAGS})
if("${flag}" MATCHES "^-I(.+)")
@@ -123,5 +124,5 @@
include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake)
FIND_PACKAGE_HANDLE_STANDARD_ARGS(
XMLRPC
- REQUIRED_VARS XMLRPC_C_FOUND XMLRPC_LIBRARIES XMLRPC_INCLUDE_DIRS
+ REQUIRED_VARS XMLRPC_C_FOUND XMLRPC_LIBRARIES
FAIL_MESSAGE "XMLRPC was not found. Make sure the entries XMLRPC_* are set.")
