[Mageia-dev] Clanlib2 and SSE2 on i586

Tue Dec 4 13:21:58 CET 2012

On Tue, Dec 4, 2012 at 12:10 PM, AL13N <alien at rmail.be> wrote:
+>> 'Twas brillig, and zezinho at 03/12/12 22:42 did gyre and gimble:
+>>> Trying to launch openalchemist gave me a crash because Clanlib2 uses
+>>> SSE2 on SSE2 systems for software rendering, while we disabled it at
+>>> configure.
+>>>
+>>> What should we do? I think enabling it is better, as all i586 CPU with
+>>> less than 10 years come with SSE2. But our policy forbids it ;-)
+>>>
+>>> ERROR FOLLOWS :
+>>>
+>>> Exception caught:
+>>> Sorry, this compiled clanSWRender does not support SSE2, but your CPU
+>>> does support SSE2. (Update clanSWRender to contain SSE2)
+>>
+>> The code should really be complied but only enabled at runtime if it's
+>> available. PulseAudio does this. It's more of a pain to code for but
+>> does make like easier for distributions.
+>>
+>> But yeah, short term fix, nuke the test, and as a meme says, keep calm
+>> and carry on.
+>
+> but, do ALL recent i586 CPU's have SSE2? what about the embedded and VIA
+> cpu's and the likes?
+
+The test is that it refuses to run if the lib is not using sse2 while
+it could (slowly).
+
+The clanSWRender lib needs to be fixed to have sse2 support on sse2
+system and not on non sse2 systems so that we can enable it but that's
+something unrelated to dropping this test.
+