[FFmpeg-devel] [RFC]configures asmalign test does not work on icc64 11.0

[Carl Eugen Hoyos]

Hi!

configure tests alignment with the following C program:
__asm__ (".align 3");
icc 11.0 for x86-64 optimizes the align away (even with -O0), so the test 
does not fail (it should, because the assembler does not like ".align 3").
Attached is a trivial try to fix this, inputs for better solutions would 
be welcome!

Thank you, Carl Eugen
-------------- next part --------------
Index: configure
===================================================================
--- configure	(Revision 16052)
+++ configure	(Arbeitskopie)
@@ -2049,8 +2049,15 @@
 check_cflags -fno-math-errno
 check_cflags -fno-signed-zeros
 
+# Find out if the .align argument is a power of two or not.
+if test $asmalign_pot = "unknown"; then
+    disable asmalign_pot
+    echo '__asm__ (".align 3");' | check_cc && enable asmalign_pot
+fi
+
 # add some flags for Intel C Compiler
 if $cc --version 2> /dev/null | grep -q Intel; then
+  disable asmalign_pot
   # Just warnings, no remarks
   check_cflags -w1
   # -wd: Disable following warnings
@@ -2082,12 +2089,6 @@
 
 VHOOKCFLAGS="-fPIC"
 
-# Find out if the .align argument is a power of two or not.
-if test $asmalign_pot = "unknown"; then
-    disable asmalign_pot
-    echo '__asm__ (".align 3");' | check_cc && enable asmalign_pot
-fi
-
 enabled_any $DECODER_LIST      && enable decoders
 enabled_any $ENCODER_LIST      && enable encoders
 enabled_any $BSF_LIST          && enable bsfs