From: Stuart Henderson <sthen@users.noreply.github.com>
Date: Mon, 25 Jan 2021 18:41:54 +0000 (+0000)
Subject: Disable inode cache on OSes without pthread_mutexattr_setpshared() (#791)
X-Git-Tag: v4.2~12
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6e95418f15722647f960d8f773edbbecbb46a73c;p=thirdparty%2Fccache.git

Disable inode cache on OSes without pthread_mutexattr_setpshared() (#791)

The inode cache requires pthread_mutexattr_setpshared() and build fails on OSes
with sys/mman.h that do not have this function.
---

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 11447717d..40e21a571 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -87,7 +87,7 @@ include(GNUInstallDirs)
 include(GenerateConfigurationFile)
 include(GenerateVersionFile)
 
-if(HAVE_SYS_MMAN_H)
+if(HAVE_SYS_MMAN_H AND HAVE_PTHREAD_MUTEXATTR_SETPSHARED)
   set(INODE_CACHE_SUPPORTED 1)
 endif()
 
diff --git a/cmake/GenerateConfigurationFile.cmake b/cmake/GenerateConfigurationFile.cmake
index afa3b78ba..6e6b60487 100644
--- a/cmake/GenerateConfigurationFile.cmake
+++ b/cmake/GenerateConfigurationFile.cmake
@@ -56,6 +56,7 @@ check_c_source_compiles(
     }
   ]=]
   HAVE_PTHREAD_MUTEX_ROBUST)
+check_function_exists(pthread_mutexattr_setpshared HAVE_PTHREAD_MUTEXATTR_SETPSHARED)
 set(CMAKE_REQUIRED_LINK_OPTIONS)
 
 include(CheckStructHasMember)
diff --git a/cmake/config.h.in b/cmake/config.h.in
index 5151e053d..b4e412f7f 100644
--- a/cmake/config.h.in
+++ b/cmake/config.h.in
@@ -88,6 +88,9 @@
 // Define if you have the "posix_fallocate.
 #cmakedefine HAVE_POSIX_FALLOCATE
 
+// Define if you have the "pthread_mutexattr_setpshared" function.
+#cmakedefine HAVE_PTHREAD_MUTEXATTR_SETPSHARED
+
 // Define if you have the <pwd.h> header file.
 #cmakedefine HAVE_PWD_H
 
diff --git a/src/system.hpp b/src/system.hpp
index bf4a26a47..ae4ca521e 100644
--- a/src/system.hpp
+++ b/src/system.hpp
@@ -171,7 +171,7 @@ DLLIMPORT extern char** environ;
 #  define O_BINARY 0
 #endif
 
-#ifdef HAVE_SYS_MMAN_H
+#if defined(HAVE_SYS_MMAN_H) && defined(HAVE_PTHREAD_MUTEXATTR_SETPSHARED)
 #  define INODE_CACHE_SUPPORTED
 #endif