On NetBSD, clang (clang-3.5.0 from pkgsrc) complains
when "clang -g" is used for linking. Specify -Qunused-arguments
to suppress the warning.
Signed-off-by: YAMAMOTO Takashi <yamam...@valinux.co.jp>
---
acinclude.m4 | 10 +++++++++-
configure.ac | 1 +
2 files changed, 10 insertions(+), 1 deletion(-)
diff --git a/acinclude.m4 b/acinclude.m4
index b09f2f2..718aa93 100644
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -534,8 +534,16 @@ AC_DEFUN([_OVS_CHECK_CC_OPTION], [dnl
dnl clang's GCC-compatible compiler driver does not return a failure
dnl exit status even though it complains about options it does not
dnl understand.
+ dnl
+ dnl Also, check stderr as gcc exits with status 0 for options
+ dnl rejected at getopt level.
+ dnl % touch /tmp/a.c
+ dnl % gcc -g -c -Werror -Qunused-arguments /tmp/a.c; echo $?
+ dnl gcc: unrecognized option '-Qunused-arguments'
+ dnl 0
+ dnl %
CFLAGS="$CFLAGS $WERROR $1"
- AC_COMPILE_IFELSE([AC_LANG_PROGRAM(,)], [ovs_cv_name[]=yes],
[ovs_cv_name[]=no])
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM(,)], [if test -s conftest.err && grep
"unrecognized option" conftest.err; then ovs_cv_name[]=no; else
ovs_cv_name[]=yes; fi], [ovs_cv_name[]=no])
CFLAGS="$ovs_save_CFLAGS"])
if test $ovs_cv_name = yes; then
m4_if([$2], [], [:], [$2])
diff --git a/configure.ac b/configure.ac
index 62d26b0..9615cb7 100644
--- a/configure.ac
+++ b/configure.ac
@@ -155,6 +155,7 @@ OVS_ENABLE_OPTION([-Wmissing-prototypes])
OVS_ENABLE_OPTION([-Wmissing-field-initializers])
OVS_ENABLE_OPTION([-Wthread-safety])
OVS_ENABLE_OPTION([-fno-strict-aliasing])
+OVS_ENABLE_OPTION([-Qunused-arguments])
OVS_CONDITIONAL_CC_OPTION([-Wno-unused], [HAVE_WNO_UNUSED])
OVS_CONDITIONAL_CC_OPTION([-Wno-unused-parameter], [HAVE_WNO_UNUSED_PARAMETER])
OVS_ENABLE_WERROR
--
2.2.1
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