Update README

[urcu.git] / README

diff --git a/README b/README
index a2cc296a480fe768d0b318cf9dcdd32002b656f6..d454757fceffa30e7622d64dfee07290537bb0ee 100644 (file)
--- a/README
+++ b/README
@@ -8,7 +8,21 @@ BUILDING
        ./configure
        make
        make install
-       
+
+       Note:   Forcing 32-bit build:
+               * CFLAGS=-m32 ./configure
+
+               Forcing 64-bit build:
+               * CFLAGS=-m64 ./configure
+
+ARCHITECTURES SUPPORTED
+-----------------------
+
+Currently, x86 (only Pentium and +), x86 64, PowerPC 32/64 and S390 are
+supported. The current use of sys_futex() makes it Linux-dependent, although
+this portability limitation might go away in a near future by using the pthread
+cond vars. Also, the restriction against i386 and i486 might go away if we
+integrate some of glibc runtime CPU-detection tests.
 
 QUICK START GUIDE
 -----------------