From: Marc Chevrier <marc.chevrier@gmail.com>
Date: Wed, 23 Sep 2020 16:06:35 +0000 (+0200)
Subject: [PATCH] Linux: Compile with _FILE_OFFSET_BITS=64 on 32-bit Linux
X-Git-Tag: archive/raspbian/3.18.4-1+rpi1^2~1
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=00667df055a166e0ed7a0634f1304d21cd145f7a;p=cmake.git

[PATCH] Linux: Compile with _FILE_OFFSET_BITS=64 on 32-bit Linux

To avoid problems accessing filesystem, use 64-bit file offsets when
compilation model is 32-bit.  This explicit definition is needed now
that KWSys does not provide LFS settings in its headers anymore.

Fixes: #20568

Gbp-Pq: Name Compile_with_FILE_OFFSET_BITS_64_on_32-bit_Linux.patch
---

diff --git a/CompileFlags.cmake b/CompileFlags.cmake
index 053259f4..1c5f1bec 100644
--- a/CompileFlags.cmake
+++ b/CompileFlags.cmake
@@ -53,6 +53,12 @@ if(CMAKE_SYSTEM_PROCESSOR MATCHES "^parisc")
   endif()
 endif()
 
+# Use 64-bit off_t on 32-bit Linux
+if (CMAKE_SYSTEM_NAME STREQUAL "Linux" AND CMAKE_SIZEOF_VOID_P EQUAL 4)
+  # ensure 64bit offsets are used for filesystem accesses for 32bit compilation
+  add_definitions(-D_FILE_OFFSET_BITS=64)
+endif()
+
 # Workaround for TOC Overflow on ppc64
 set(bigTocFlag "")
 if(CMAKE_SYSTEM_NAME STREQUAL "AIX" AND