[x264-devel] [PATCH] configure: force -O0 for the endian check

[Måns Rullgård]

Georgi Chorbadzhiyski <gf at unixsol.org> writes:

> Around 03/07/2012 02:36 PM, Gil Pedersen scribbled:
>> The clang compiler won't output standard object code when -O4 is set, causing the checks to fail.
>> ---
>>  configure |    2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>> 
>> diff --git a/configure b/configure
>> index 16970b8..69a38ae 100755
>> --- a/configure
>> +++ b/configure
>> @@ -713,7 +713,7 @@ define SYS_$SYS
>>  # skip endianness check for Intel Compiler, as all supported platforms are little. the -ipo flag will also cause the check to fail
>>  if [ $compiler = GNU ]; then
>>      echo "int i[2] = {0x42494745,0}; double f[2] = {0x1.0656e6469616ep+102,0};" > conftest.c
>> -    $CC $CFLAGS conftest.c -c -o conftest.o 2>/dev/null || die "endian test failed"
>> +    $CC $CFLAGS -O0 conftest.c -c -o conftest.o 2>/dev/null || die "endian test failed"
>>      if (${cross_prefix}strings -a conftest.o | grep -q BIGE) && (${cross_prefix}strings -a conftest.o | grep -q FPendian) ; then
>>          define WORDS_BIGENDIAN
>>      elif !(${cross_prefix}strings -a conftest.o | grep -q EGIB && ${cross_prefix}strings -a conftest.o | grep -q naidnePF) ; then
>
> -O4 is not valid optimization flag.

-O4 is perfectly valid in clang.

-- 
Måns Rullgård
mans at mansr.com