build-sys: add check for gperf lookup function signature (#5055)

gperf-3.1 generates lookup functions that take a size_t length
parameter instead of unsigned int. Test for this at configure time.

Fixes: https://github.com/elogind/elogind/issues/5039

diff --git a/src/login/logind.h b/src/login/logind.h
index 9be29ab280e183f57ed67da3b4083bc27b98cc82..8f6fb72dbeb853d56ea2d49d833cda14d455e10e 100644 (file)
--- a/src/login/logind.h
+++ b/src/login/logind.h
@@ -47,7 +47,6 @@ typedef struct Manager Manager;
 #define MANAGER_IS_SYSTEM(m) ((m)->is_system)
 #define MANAGER_IS_USER(m) (!((m)->is_system))
 #endif // 1
-
 struct Manager {
         sd_event *event;
         sd_bus *bus;