config: Check for and use gcc -Wlogical-op and -Wduplicated-cond.

Both -Wlogical-op and -Wduplicated-cond may produce useful warnings.
But we have to check them first. Older versions of gcc had a -Wlogical-op
that warned on some constructs using macros that are not erronious.
Only GCC6 has -Wduplicated-cond.

Signed-off-by: Mark Wielaard <mjw@redhat.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index 637bc130..dce61adf 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2016-02-08  Mark Wielaard  <mjw@redhat.com>
+
+	* configure.ac: Add checks for sane -Wlogical-op and whether gcc
+	accepts -Wduplicated-cond.
+
 2016-01-08  Mark Wielaard  <mjw@redhat.com>
 
 	* configure.ac: Set version to 0.165.