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diff --git a/source/acinclude.m4 b/source/acinclude.m4
--- a/source/acinclude.m4
+++ b/source/acinclude.m4
@@ -459,30 +459,36 @@ AC_DEFUN([AC_CHECK_STRICT_COMPILE],
], [ac_use_strict_options=yes])
AC_MSG_RESULT($ac_use_strict_options)
if test "$ac_use_strict_options" = yes
then
if test "$GCC" = yes
then
CFLAGS="$CFLAGS -Wall -pedantic -Wshadow -Wpointer-arith -Wmissing-prototypes -Wwrite-strings"
+
+ # Suppress clang C warnings:
+ CFLAGS="$CFLAGS -Wno-sign-compare -Wno-unused"
else
case "${host}" in
*-*-cygwin)
if test "`$CC /help 2>&1 | head -c9`" = "Microsoft"
then
CFLAGS="$CFLAGS /W4"
fi ;;
*-*-mingw*)
CFLAGS="$CFLAGS -W4" ;;
esac
fi
if test "$GXX" = yes
then
CXXFLAGS="$CXXFLAGS -W -Wall -pedantic -Wpointer-arith -Wwrite-strings -Wno-long-long"
+
+ # Suppress clang C++ warnings:
+ CXXFLAGS="$CXXFLAGS -Wno-unused -Wno-unused-parameter"
else
case "${host}" in
*-*-cygwin)
if test "`$CXX /help 2>&1 | head -c9`" = "Microsoft"
then
CXXFLAGS="$CXXFLAGS /W4"
fi ;;
*-*-mingw*)
diff --git a/source/configure b/source/configure
--- a/source/configure
+++ b/source/configure
@@ -5227,30 +5227,36 @@ fi
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_use_strict_options" >&5
printf "%s\n" "$ac_use_strict_options" >&6; }
if test "$ac_use_strict_options" = yes
then
if test "$GCC" = yes
then
CFLAGS="$CFLAGS -Wall -pedantic -Wshadow -Wpointer-arith -Wmissing-prototypes -Wwrite-strings"
+
+ # Suppress clang C warnings:
+ CFLAGS="$CFLAGS -Wno-sign-compare -Wno-unused"
else
case "${host}" in
*-*-cygwin)
if test "`$CC /help 2>&1 | head -c9`" = "Microsoft"
then
CFLAGS="$CFLAGS /W4"
fi ;;
*-*-mingw*)
CFLAGS="$CFLAGS -W4" ;;
esac
fi
if test "$GXX" = yes
then
CXXFLAGS="$CXXFLAGS -W -Wall -pedantic -Wpointer-arith -Wwrite-strings -Wno-long-long"
+
+ # Suppress clang C++ warnings:
+ CXXFLAGS="$CXXFLAGS -Wno-unused -Wno-unused-parameter"
else
case "${host}" in
*-*-cygwin)
if test "`$CXX /help 2>&1 | head -c9`" = "Microsoft"
then
CXXFLAGS="$CXXFLAGS /W4"
fi ;;
*-*-mingw*)
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