Disable QTC inside the library by default (fixes #714)

This results in measurable performance improvements to packaged binary
libqpdf distributions. QTC remains available for library users and is
still selectively enabled in CI.

1 files changed, 8 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index bc479f17..b861ddda 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+2022-08-07  Jay Berkenbilt  <ejb@ql.org>
+
+        * Add new build configuration option ENABLE_QTC, which is off by
+        default when not running in MAINTAINER_MODE. When this is off,
+        QTC coverage calls sprinkled throughout the qpdf source code are
+        compiled out for increased performance. See "Build Options" in the
+        manual for a discussion. Fixes #714.
+
 2022-08-06  Jay Berkenbilt  <ejb@ql.org>
 
         * Added by m-holger: QPDF::getObject() method as a simpler form of