Build system: use SPDX identifiers

[urcu.git] / README.md

diff --git a/README.md b/README.md
index 4c39778aabd2c422ca2304aef0f14ac5738762a7..a9f1688f5d2e1bcbd1dd577bc83f14261bc1c45f 100644 (file)
--- a/README.md
+++ b/README.md
@@ -1,3 +1,9 @@
+<!--
+SPDX-FileCopyrightText: 2023 EfficiOS Inc.
+
+SPDX-License-Identifier: CC-BY-4.0
+-->
+
 Userspace RCU Implementation
 ============================
 
@@ -55,7 +61,7 @@ Currently, the following architectures are supported:
 Tested on:
 
   - Linux all architectures
-  - FreeBSD 8.2/8.3/9.0/9.1/10.0 i386/amd64
+  - FreeBSD 13 i386/amd64
   - Cygwin i386/amd64
   - MacOS amd64/arm64
 
@@ -68,14 +74,15 @@ Should also work on:
 
 (more testing needed before claiming support for these OS).
 
-Linux ARM depends on running a Linux kernel 2.6.15 or better, GCC 4.4 or
-better.
 
-The C compiler used needs to support at least C99. The C++ compiler used
-needs to support at least C++11.
+Toolchain support
+-----------------
+
+The C compiler used needs to support at least C99. The C++ compiler used needs
+to support at least C++11. The oldest GCC version officialy supported and
+tested is 4.8.
 
-The GCC compiler versions 3.3, 3.4, 4.0, 4.1, 4.2, 4.3, 4.4 and 4.5 are
-supported, with the following exceptions:
+Older GCC versions might still work with the following exceptions:
 
   - GCC 3.3 and 3.4 have a bug that prevents them from generating volatile
     accesses to offsets in a TLS structure on 32-bit x86. These versions are
@@ -96,6 +103,10 @@ Clang version 3.0 (based on LLVM 3.0) is supported.
 Glibc >= 2.4 should work but the older version we test against is
 currently 2.17.
 
+
+Build system
+------------
+
 For developers using the Git tree:
 
 This source tree is based on the autotools suite from GNU to simplify