From: Joel Rosdahl <joel@rosdahl.net>
Date: Thu, 4 Aug 2022 18:55:19 +0000 (+0200)
Subject: fix: Only enable inode cache if subsecond stat timestamps are available
X-Git-Tag: v4.6.2~6
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c31f4e4174483bd7db90dd2b0c28fae27d9083a8;p=thirdparty%2Fccache.git

fix: Only enable inode cache if subsecond stat timestamps are available

If such fields are not available we risk false positive inode cache
hits.

(cherry picked from commit 879007ad0ced5373b314ac92590b665c072f814a)
---

diff --git a/cmake/GenerateConfigurationFile.cmake b/cmake/GenerateConfigurationFile.cmake
index 8e2c2202f..efefb9d36 100644
--- a/cmake/GenerateConfigurationFile.cmake
+++ b/cmake/GenerateConfigurationFile.cmake
@@ -110,7 +110,7 @@ endif()
 # alias
 set(MTR_ENABLED "${ENABLE_TRACING}")
 
-if(HAVE_SYS_MMAN_H AND HAVE_PTHREAD_MUTEXATTR_SETPSHARED)
+if(HAVE_SYS_MMAN_H AND HAVE_PTHREAD_MUTEXATTR_SETPSHARED AND (HAVE_STRUCT_STAT_ST_MTIM OR HAVE_STRUCT_STAT_ST_MTIMESPEC))
   set(INODE_CACHE_SUPPORTED 1)
 endif()