[PATCH libevdev] build: check for link-flags harder

[Giovanni Campagna]

2013/9/16 Peter Hutterer <peter.hutterer at who-t.net>:
> On Fri, Sep 13, 2013 at 11:28:00AM +0200, David Herrmann wrote:
>> Don't use AC_COMPILE_IFELSE but AC_LINK_IFELSE for compiler/linker flags.
>> Otherwise, flags like -fstack-protector may compile just fine but the
>> linker can lack support for ssp.
>>
>> Reported-by: Giovanni Campagna <gcampagn at redhat.com>
>> Signed-off-by: David Herrmann <dh.herrmann at gmail.com>
>> ---
>>  m4/attributes.m4 | 6 +++---
>>  1 file changed, 3 insertions(+), 3 deletions(-)
>>
>> diff --git a/m4/attributes.m4 b/m4/attributes.m4
>> index 7e080da..aa53ef2 100644
>> --- a/m4/attributes.m4
>> +++ b/m4/attributes.m4
>> @@ -42,9 +42,9 @@ AC_DEFUN([CC_CHECK_FLAG_APPEND], [
>>                   AS_TR_SH([cc_cv_$2_$3]),
>>            [eval "AS_TR_SH([cc_save_$2])='${$2}'"
>>             eval "AS_TR_SH([$2])='-Werror $3'"
>> -           AC_COMPILE_IFELSE([AC_LANG_SOURCE([int a = 0; int main(void) { return a; } ])],
>> -                                    [eval "AS_TR_SH([cc_cv_$2_$3])='yes'"],
>> -                                    [eval "AS_TR_SH([cc_cv_$2_$3])='no'"])
>> +           AC_LINK_IFELSE([AC_LANG_SOURCE([int a = 0; int main(void) { return a; } ])],
>> +                          [eval "AS_TR_SH([cc_cv_$2_$3])='yes'"],
>> +                          [eval "AS_TR_SH([cc_cv_$2_$3])='no'"])
>>             eval "AS_TR_SH([$2])='$cc_save_$2'"])
>>
>>    AS_IF([eval test x$]AS_TR_SH([cc_cv_$2_$3])[ = xyes],
>> --
>> 1.8.4
>>
>
> looks good. Giovanni: did this patch detect your errors?

In the end, the error was a different one, so I think this patch is
not necessary.

Giovanni