From 734ab587649f27dcb44458cfb43cf809ffdd9fc5 Mon Sep 17 00:00:00 2001
From: Jay Berkenbilt <ejb@ql.org>
Date: Thu, 16 Apr 2020 12:40:53 -0400
Subject: Use -Wshadow=local if supported

---
 configure | 67 ++++++++++++++++++++++++++++++++++++++++++++++++++-------------
 1 file changed, 54 insertions(+), 13 deletions(-)

(limited to 'configure')

diff --git a/configure b/configure
index 9703878f..d6aebce8 100755
--- a/configure
+++ b/configure
@@ -785,7 +785,6 @@ enable_largefile
 enable_ld_version_script
 with_buildrules
 enable_werror
-enable_int_warnings
 enable_implicit_crypto
 enable_crypto_native
 enable_crypto_openssl
@@ -1473,8 +1472,6 @@ Optional Features:
   --enable-ld-version-script
                           enable linker version script (default is enabled)
   --enable-werror         whether to treat warnings as errors (default is no)
-  --enable-int-warnings   whether to turn on integer type warnings (default is
-                          yes)
   --enable-implicit-crypto
                           whether to enable available crypto providers that
                           are not explicitly requested; true by default
@@ -17631,26 +17628,70 @@ if test "$BUILDRULES" = "msvc"; then
 else
    try_flags="-Wconversion -Wsign-conversion"
 fi
+oCFLAGS=$CFLAGS
+CFLAGS="$CFLAGS $try_flags"
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for whether to use $try_flags" >&5
 $as_echo_n "checking for whether to use $try_flags... " >&6; }
-# Check whether --enable-int-warnings was given.
-if test "${enable_int_warnings+set}" = set; then :
-  enableval=$enable_int_warnings; if test "$enableval" = "yes"; then
-      qpdf_INT_WARNINGS=1;
-    else
-      qpdf_INT_WARNINGS=0;
-    fi
-else
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+int a = 1; int b = a; a = b;
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
   qpdf_INT_WARNINGS=1
+else
+  qpdf_INT_WARNINGS=0
 fi
-
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
 if test "$qpdf_INT_WARNINGS" = "1"; then
    { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 $as_echo "yes" >&6; }
-   WFLAGS="$WFLAGS $try_flags"
+   CXXFLAGS="$CXXFLAGS $try_flags"
 else
    { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
 $as_echo "no" >&6; }
+   CFLAGS=$oCFLAGS
+fi
+
+if test "$BUILDRULES" != "msvc"; then
+   try_flags="-Wshadow=local"
+   oCFLAGS=$CFLAGS
+   CFLAGS="$CFLAGS $try_flags -Werror"
+   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for whether to use $try_flags" >&5
+$as_echo_n "checking for whether to use $try_flags... " >&6; }
+   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+int a = 1; int b = a; a = b;
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  qpdf_SHADOW_WARNINGS=1
+else
+  qpdf_SHADOW_WARNINGS=0
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+   if test "$qpdf_SHADOW_WARNINGS" = "1"; then
+      { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+      CFLAGS="$oCFLAGS $try_flags"
+      CXXFLAGS="$CXXFLAGS $try_flags"
+   else
+      { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+      CFLAGS=$oCFLAGS
+   fi
 fi
 
 
-- 
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