https://github.com/xiph/opus/pull/149

From a729a53efcfd7c37c69d76a9ae11c89b48eca1f0 Mon Sep 17 00:00:00 2001

From: sezero <sezero@users.sourceforge.net>

Date: Sun, 6 Oct 2019 14:37:02 +0300

Subject: [PATCH] configure: adjust x86 get cpu info inline assembly method for PIC case

.. just like the way it is done in celt/x86/x86cpu.c.

---

configure.ac | 13 +++++++++++++

1 file changed, 13 insertions(+)

diff --git a/configure.ac b/configure.ac

index 18ece291..f12f0aa9 100644

--- a/configure.ac

+++ b/configure.ac

@@ -691,6 +691,18 @@ AS_IF([test x"$enable_intrinsics" = x"yes"],[

unsigned int CPUInfo2;

unsigned int CPUInfo3;

unsigned int InfoType;

+ #if defined(__i386__) && defined(__PIC__)

+ __asm__ __volatile__ (

+ "xchg %%ebx, %1\n"

+ "cpuid\n"

+ "xchg %%ebx, %1\n":

+ "=a" (CPUInfo0),

+ "=r" (CPUInfo1),

+ "=c" (CPUInfo2),

+ "=d" (CPUInfo3) :

+ "a" (InfoType), "c" (0)

+ );

+ #else

__asm__ __volatile__ (

"cpuid":

"=a" (CPUInfo0),

@@ -699,6 +711,7 @@ AS_IF([test x"$enable_intrinsics" = x"yes"],[

"=d" (CPUInfo3) :

"a" (InfoType), "c" (0)

);

+ #endif

]])],

[get_cpuid_by_asm="yes"

AC_MSG_RESULT([Inline Assembly])