From f562d494b09dd889ac7600cfd22e4d7124e8656c Mon Sep 17 00:00:00 2001
From: Jay Berkenbilt <ejb@ql.org>
Date: Tue, 18 Jun 2019 18:43:49 -0400
Subject: configure: add --enable-int-warnings

---
 configure.ac | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

(limited to 'configure.ac')

diff --git a/configure.ac b/configure.ac
index 75993fdb..13db7395 100644
--- a/configure.ac
+++ b/configure.ac
@@ -392,6 +392,27 @@ else
    AC_MSG_RESULT(no)
 fi
 
+if test "$BUILDRULES" = "msvc"; then
+   try_flags="-W3"
+else
+   try_flags="-Wconversion -Wsign-conversion"
+fi
+AC_MSG_CHECKING(for whether to use $try_flags)
+AC_ARG_ENABLE(int-warnings,
+   AS_HELP_STRING([--enable-int-warnings],
+                  [whether to turn on integer type warnings (default is no)]),
+   [if test "$enableval" = "yes"; then
+      qpdf_INT_WARNINGS=1;
+    else
+      qpdf_INT_WARNINGS=0;
+    fi], [qpdf_INT_WARNINGS=0])
+if test "$qpdf_INT_WARNINGS" = "1"; then
+   AC_MSG_RESULT(yes)
+   WFLAGS="$WFLAGS $try_flags"
+else
+   AC_MSG_RESULT(no)
+fi
+
 AC_SUBST(QPDF_SKIP_TEST_COMPARE_IMAGES)
 AC_ARG_ENABLE(test-compare-images,
    AS_HELP_STRING([--enable-test-compare-images],
-- 
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