diff -up firefox-78.2.0/mozglue/build/ppc.cpp.ppc-vsx firefox-78.2.0/mozglue/build/ppc.cpp

--- firefox-78.2.0/mozglue/build/ppc.cpp.ppc-vsx	2020-09-11 07:07:05.850864720 +0200

+++ firefox-78.2.0/mozglue/build/ppc.cpp	2020-09-11 07:08:48.884202679 +0200

@@ -14,10 +14,6 @@

 #if defined(XP_LINUX)

 // Use the getauxval() function if available.

 // ARCH_3_00 wasn't defined until glibc 2.23, so include just in case.

-#  include <sys/auxv.h>

-#  ifndef PPC_FEATURE2_ARCH_3_00

-#    define PPC_FEATURE2_ARCH_3_00 0x00800000

-#  endif

 #endif

 const unsigned PPC_FLAG_VMX = 1;

@@ -33,24 +29,8 @@ static signed get_ppc_cpu_flags(void) {

   }

   cpu_flags = 0;

-#if defined(XP_LINUX)

-  // Try getauxval().

-  unsigned long int cap = getauxval(AT_HWCAP);

-  unsigned long int cap2 = getauxval(AT_HWCAP2);

-

-  if (cap & PPC_FEATURE_HAS_ALTIVEC) {

-    cpu_flags |= PPC_FLAG_VMX;

-  }

-  if (cap & PPC_FEATURE_HAS_VSX) {

-    cpu_flags |= PPC_FLAG_VSX;

-  }

-  if (cap2 & PPC_FEATURE2_ARCH_3_00) {

-    cpu_flags |= PPC_FLAG_VSX3;

-  }

-#else

   // Non-Linux detection here. Currently, on systems other than Linux,

   // no CPU SIMD features will be detected.

-#endif

   return cpu_flags;

 }