Merge pull request #15247 from neheb/fiber

boost: fixup mips64 fiber patch

libs/boost/Makefile

@@ -13,7 +13,7 @@ include $(TOPDIR)/rules.mk
 PKG_NAME:=boost
 PKG_VERSION:=1.75.0
 PKG_SOURCE_VERSION:=1_75_0
-PKG_RELEASE:=2
+PKG_RELEASE:=3
 
 PKG_SOURCE:=$(PKG_NAME)_$(PKG_SOURCE_VERSION).tar.bz2
 PKG_SOURCE_URL:=@SF/$(PKG_NAME)/$(PKG_NAME)/$(PKG_VERSION) https://dl.bintray.com/boostorg/release/$(PKG_VERSION)/source/

libs/boost/patches/020-mips64-fiber.patch

@@ -5,7 +5,7 @@
  #  define cpu_relax() asm volatile ("nop" ::: "memory");
  # endif
 -#elif BOOST_ARCH_MIPS && (__mips_isa_rev > 1)
-+#elif BOOST_ARCH_MIPS && (__mips_isa_rev > 1) && !defined(_MIPS_ARCH_OCTEONP)
++#elif BOOST_ARCH_MIPS && (((__mips_isa_rev > 1) && defined(__mips32)) || ((__mips_isa_rev > 2)  && defined(__mips64)))
  # define cpu_relax() asm volatile ("pause" ::: "memory");
  #elif BOOST_ARCH_PPC
  // http://code.metager.de/source/xref/gnu/glibc/sysdeps/powerpc/sys/platform/ppc.h