boost: fix mips soft float compilation

Upstream-Status: Submitted https://svn.boost.org/trac/boost/ticket/11756

(From OE-Core rev: 3e40a1d230a9c6f169f78c990b428019f321d90b)

Signed-off-by: André Draszik <git@andred.net>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-support/boost/boost/0002-boost-test-execution_monitor.hpp-fix-mips-soft-float.patch

@@ -0,0 +1,145 @@
+From 5c349a1c391c9ce171a1c80f5164fae764f27dba Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Andr=C3=A9=20Draszik?= <adraszik@tycoint.com>
+Date: Wed, 24 Aug 2016 20:58:59 +0100
+Subject: [PATCH 2/4] boost/test/execution_monitor.hpp: fix mips soft float
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+gcc.compile.c++ <builddir>/boost/bin.v2/libs/test/build/gcc-4.3.1/release/threading-multi/execution_monitor.o
+
+    "mipsel-poky-linux-musl-g++" "-mel" "-mabi=32" "-msoft-float" "-march=mips32r2" "-mips16" "-minterlink-compressed" "-mtune=24kec" "-mdsp" "-Wl,-O1" "-Wl,--as-needed" "-fstack-protector-strong" "-Wl,-z,relro,-z,now" "--sysroot=<sysroot>"  -ftemplate-depth-128 -O2 -pipe -g -feliminate-unused-debug-types -fdebug-prefix-map=<srcdir>=/usr/src/debug/boost/1.61.0-r0 -fdebug-prefix-map=<sysroot_host>= -fdebug-prefix-map=<sysroot>= -fstack-protector-strong -pie -fpie -D_FORTIFY_SOURCE=2 -Wformat -Wformat-security -Werror=format-security -fvisibility-inlines-hidden -O3 -finline-functions -Wno-inline -Wall -pedantic -pthread -fPIC -Wno-variadic-macros -DBOOST_ALL_NO_LIB=1 -DBOOST_CHRONO_DYN_LINK=1 -DBOOST_SYSTEM_DYN_LINK=1 -DBOOST_SYSTEM_NO_DEPRECATED -DBOOST_TEST_DYN_LINK=1 -DBOOST_TIMER_DYN_LINK=1 -DNDEBUG  -I"." -c -o "<builddir>/boost/bin.v2/libs/test/build/gcc-4.3.1/release/threading-multi/execution_monitor.o" "libs/test/src/execution_monitor.cpp"
+
+In file included from ./boost/test/impl/execution_monitor.ipp:31:0,
+                 from libs/test/src/execution_monitor.cpp:16:
+./boost/test/execution_monitor.hpp:491:27: error: 'FE_DIVBYZERO' was not declared in this scope
+     BOOST_FPE_DIVBYZERO = FE_DIVBYZERO,
+                           ^~~~~~~~~~~~
+./boost/test/execution_monitor.hpp:492:27: error: 'FE_INEXACT' was not declared in this scope
+     BOOST_FPE_INEXACT   = FE_INEXACT,
+                           ^~~~~~~~~~
+./boost/test/execution_monitor.hpp:493:27: error: 'FE_INVALID' was not declared in this scope
+     BOOST_FPE_INVALID   = FE_INVALID,
+                           ^~~~~~~~~~
+./boost/test/execution_monitor.hpp:494:27: error: 'FE_OVERFLOW' was not declared in this scope
+     BOOST_FPE_OVERFLOW  = FE_OVERFLOW,
+                           ^~~~~~~~~~~
+./boost/test/execution_monitor.hpp:495:27: error: 'FE_UNDERFLOW' was not declared in this scope
+     BOOST_FPE_UNDERFLOW = FE_UNDERFLOW,
+                           ^~~~~~~~~~~~
+
+The reason is that some (notably FPU-less) architectures,
+including mips*-nf, don't define/implement some of the
+floating point constants, even though fenv.h is
+available.
+
+The key point is:
+  A fully standards conforming fenv.h does not have to
+  define any FE_* macros, and if it does define them,
+  then it defines macros only for the FP exceptions it
+  actually supports.
+
+So correct usage requires a triple check:
+1) Check BOOST_NO_FENV_H to see if the header is supported.
+2) Include the header and then check FE_ALL_EXCEPT to see
+   if any FP exceptions are supported.
+3) Before using the individual FE_* macros, you need to
+   check for their existence too as not all may be
+   supported.
+
+https://svn.boost.org/trac/boost/ticket/11756
+
+Other projects have similar issues, e.g. pixman, and
+apply similar work-arounds:
+  https://lists.freedesktop.org/archives/pixman/2014-February/003172.html
+
+Architectures are notably also allowed to define FE_ALL_EXCEPT to 0!
+Keeping this in mind, and knowing that the compiler will eliminate
+code that can't be executed, we can change BOOST_FPE_ALL to be 0 for
+the case of compiling using Clang and/or fenv.h being unavailable
+as well, which allows simplification of the #ifdef's in
+execution_monitor.ipp a bit.
+
+Signed-off-by: André Draszik <adraszik@tycoint.com>
+---
+Upstream-Status: Submitted https://svn.boost.org/trac/boost/ticket/11756
+ boost/test/execution_monitor.hpp      | 26 +++++++++++++++++++++++++-
+ boost/test/impl/execution_monitor.ipp | 10 ++++++++--
+ 2 files changed, 33 insertions(+), 3 deletions(-)
+
+diff --git a/boost/test/execution_monitor.hpp b/boost/test/execution_monitor.hpp
+index 0eee497..44fe59d 100644
+--- a/boost/test/execution_monitor.hpp
++++ b/boost/test/execution_monitor.hpp
+@@ -486,15 +486,39 @@ enum masks {
+     BOOST_FPE_ALL       = MCW_EM,
+ #elif defined(BOOST_NO_FENV_H) || defined(BOOST_CLANG) \
+     || defined(__ARM_PCS)
+-    BOOST_FPE_ALL       = 1,
++    BOOST_FPE_ALL       = 0,
+ #else
++#if defined(FE_DIVBYZERO)
+     BOOST_FPE_DIVBYZERO = FE_DIVBYZERO,
++#else
++    BOOST_FPE_DIVBYZERO = 0,
++#endif
++#if defined(FE_INEXACT)
+     BOOST_FPE_INEXACT   = FE_INEXACT,
++#else
++    BOOST_FPE_INEXACT   = 0,
++#endif
++#if defined(FE_INVALID)
+     BOOST_FPE_INVALID   = FE_INVALID,
++#else
++    BOOST_FPE_INVALID   = 0,
++#endif
++#if defined(FE_OVERFLOW)
+     BOOST_FPE_OVERFLOW  = FE_OVERFLOW,
++#else
++    BOOST_FPE_OVERFLOW  = 0,
++#endif
++#if defined(FE_UNDERFLOW)
+     BOOST_FPE_UNDERFLOW = FE_UNDERFLOW,
++#else
++    BOOST_FPE_UNDERFLOW = 0,
++#endif
+ 
++#if defined(FE_ALL_EXCEPT)
+     BOOST_FPE_ALL       = FE_ALL_EXCEPT,
++#else
++    BOOST_FPE_ALL       = 0,
++#endif
+ #endif
+     BOOST_FPE_INV       = BOOST_FPE_ALL+1
+ };
+diff --git a/boost/test/impl/execution_monitor.ipp b/boost/test/impl/execution_monitor.ipp
+index f7fc8ea..d1088b9 100644
+--- a/boost/test/impl/execution_monitor.ipp
++++ b/boost/test/impl/execution_monitor.ipp
+@@ -1381,7 +1381,10 @@ enable( unsigned mask )
+ #endif
+ 
+     return ~old_cw & BOOST_FPE_ALL;
+-#elif defined(__GLIBC__) && defined(__USE_GNU) && !defined(BOOST_CLANG) && !defined(BOOST_NO_FENV_H)
++#elif defined(__GLIBC__) && defined(__USE_GNU)
++    if (BOOST_FPE_ALL == 0)
++        /* Not Implemented */
++        return 0;
+     feclearexcept(BOOST_FPE_ALL);
+     int res = feenableexcept( mask );
+     return res == -1 ? (unsigned)BOOST_FPE_INV : (unsigned)res;
+@@ -1418,7 +1421,10 @@ disable( unsigned mask )
+ #endif
+ 
+     return ~old_cw & BOOST_FPE_ALL;
+-#elif defined(__GLIBC__) && defined(__USE_GNU) && !defined(BOOST_CLANG) && !defined(BOOST_NO_FENV_H)
++#elif defined(__GLIBC__) && defined(__USE_GNU)
++    if (BOOST_FPE_ALL == 0)
++        /* Not Implemented */
++        return BOOST_FPE_INV;
+     feclearexcept(BOOST_FPE_ALL);
+     int res = fedisableexcept( mask );
+     return res == -1 ? (unsigned)BOOST_FPE_INV : (unsigned)res;
+-- 
+2.9.3
+

meta/recipes-support/boost/boost_1.61.0.bb

@@ -6,4 +6,5 @@ SRC_URI += "\
     file://consider-hardfp.patch \
     file://boost-CVE-2012-2677.patch \
     file://0001-boost-asio-detail-socket_types.hpp-fix-poll.h-includ.patch \
+    file://0002-boost-test-execution_monitor.hpp-fix-mips-soft-float.patch \
 "