diff --git a/chapter01/changelog.xml b/chapter01/changelog.xml
index de3f6a6ff..82d54d34c 100644
--- a/chapter01/changelog.xml
+++ b/chapter01/changelog.xml
@@ -35,6 +35,18 @@
-->
+
+ 2016-04-07
+
+
+ [bdubbs] - Add a caution in the gmp section
+ about possible "Illegal Instruction" errors if
+ the host is misidentified or the libraries are
+ copied to different systems.
+
+
+
+
2016-04-05
diff --git a/chapter06/gmp.xml b/chapter06/gmp.xml
index 7d353d90c..da655db6a 100644
--- a/chapter06/gmp.xml
+++ b/chapter06/gmp.xml
@@ -90,6 +90,13 @@ make html
Test the results:
make check 2>&1 | tee gmp-check-log
+
+ The code in gmp is highly optimized for the processor where
+ it is built. Occasionally the code that detects the processor misidentifies
+ the system capabilities and there will be errors in the tests or other
+ applications using the gmp libraries with the message "Illegal
+ instruction". In this case, gmp should be reconfigured with the option
+ --build=x86_64-unknown-linux-gnu and rebuilt.
Ensure that all 190 tests in the test suite passed.
Check the results by issuing the following command:
diff --git a/general.ent b/general.ent
index c53d6f670..972f359ab 100644
--- a/general.ent
+++ b/general.ent
@@ -1,7 +1,7 @@
-
+
-
+