Add BOOST_HAS_FLOAT128 for compilers that support __float128 as a distinct type.

checks/Jamfile.v2

@@ -1,6 +1,6 @@
 #
 # *** DO NOT EDIT THIS FILE BY HAND ***
-# This file was automatically generated on Fri Jun 26 21:48:00 2015
+# This file was automatically generated on Thu Aug 13 16:32:12 2015
 #  by libs/config/tools/generate.cpp
 # Copyright John Maddock.
 # Use, modification and distribution are subject to the 
@@ -41,6 +41,9 @@ explicit dirent_h ;
 run-simple test_case.cpp : : : <define>TEST_BOOST_HAS_EXPM1 : expm1 ;
 alias expm1 : expm1.output ;
 explicit expm1 ;
+run-simple test_case.cpp : : : <define>TEST_BOOST_HAS_FLOAT128 : float128 ;
+alias float128 : float128.output ;
+explicit float128 ;
 run-simple test_case.cpp : : : <define>TEST_BOOST_HAS_FTIME : ftime ;
 alias ftime : ftime.output ;
 explicit ftime ;

checks/test_case.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Fri Jun 26 21:48:00 2015
+//  This file was automatically generated on Thu Aug 13 16:32:12 2015
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 
@@ -29,6 +29,10 @@ namespace test = boost_has_dirent_h;
 #  include "../test/boost_has_expm1.ipp"
 namespace test = boost_has_expm1;
 #endif
+#ifdef TEST_BOOST_HAS_FLOAT128
+#  include "../test/boost_has_float128.ipp"
+namespace test = boost_has_float128;
+#endif
 #ifdef TEST_BOOST_HAS_FTIME
 #  include "../test/boost_has_ftime.ipp"
 namespace test = boost_has_ftime;

doc/html/boost_config/boost_macro_reference.html

@@ -1427,6 +1427,25 @@
               </td>
 </tr>
 <tr>
+<td>
+                <p>
+                  <code class="computeroutput"><span class="identifier">BOOST_HAS_FLOAT128</span></code>
+                </p>
+              </td>
+<td>
+                <p>
+                  Compiler
+                </p>
+              </td>
+<td>
+                <p>
+                  The compiler has <code class="computeroutput"><span class="identifier">__float128</span></code>
+                  as a native type which is distinct from all the regular C++ floating
+                  point types.
+                </p>
+              </td>
+</tr>
+<tr>
 <td>
                 <p>
                   <code class="computeroutput"><span class="identifier">BOOST_HAS_FTIME</span></code>

doc/html/index.html

@@ -988,7 +988,7 @@
 </div>
 </div>
 <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
-<td align="left"><p><small>Last revised: July 07, 2015 at 10:18:34 GMT</small></p></td>
+<td align="left"><p><small>Last revised: August 13, 2015 at 16:11:58 GMT</small></p></td>
 <td align="right"><div class="copyright-footer"></div></td>
 </tr></table>
 <hr>

doc/macro_reference.qbk

@@ -348,6 +348,9 @@ The platform has the POSIX header `<dirent.h>`.
 [[`BOOST_HAS_EXPM1`][Platform][
 The platform has the functions `expm1`, `expm1f` and `expm1l` in `<math.h>`
 ]]
+[[`BOOST_HAS_FLOAT128`][Compiler][
+The compiler has `__float128` as a native type which is distinct
+from all the regular C++ floating point types.]]
 [[`BOOST_HAS_FTIME`][Platform][
 The platform has the Win32 API type FTIME.
 ]]

include/boost/config/compiler/gcc.hpp

@@ -143,6 +143,19 @@
 #if defined(__SIZEOF_INT128__) && !defined(__CUDACC__)
 #  define BOOST_HAS_INT128
 #endif
+//
+// Recent GCC versions have a __float128 native type, we need to
+// include a std lib header to detect this - not ideal, but we'll
+// be including <cstddef> later anyway when we select the std lib.
+//
+#ifdef __cplusplus
+#include <cstddef>
+#else
+#include <stddef.h>
+#endif
+#if defined(_GLIBCXX_USE_FLOAT128) && !defined(__STRICT_ANSI__)
+# define BOOST_HAS_FLOAT128
+#endif
 
 // C++0x features in 4.3.n and later
 //

test/all/Jamfile.v2

@@ -1,7 +1,7 @@
 #
 # Regression test Jamfile for boost configuration setup.
 # *** DO NOT EDIT THIS FILE BY HAND ***
-# This file was automatically generated on Fri Jun 26 21:48:00 2015
+# This file was automatically generated on Thu Aug 13 16:32:12 2015
 #  by libs/config/tools/generate.cpp
 # Copyright John Maddock.
 # Use, modification and distribution are subject to the 
@@ -37,6 +37,9 @@ test-suite "BOOST_HAS_DIRENT_H" :
 test-suite "BOOST_HAS_EXPM1" : 
 [ run ../has_expm1_pass.cpp ]
 [ compile-fail ../has_expm1_fail.cpp ] ;
+test-suite "BOOST_HAS_FLOAT128" : 
+[ run ../has_float128_pass.cpp ]
+[ compile-fail ../has_float128_fail.cpp ] ;
 test-suite "BOOST_HAS_FTIME" : 
 [ run ../has_ftime_pass.cpp ]
 [ compile-fail ../has_ftime_fail.cpp ] ;

test/config_info.cpp

@@ -937,6 +937,7 @@ void print_boost_macros()
    PRINT_MACRO(BOOST_HAS_CLOCK_GETTIME);
    PRINT_MACRO(BOOST_HAS_DIRENT_H);
    PRINT_MACRO(BOOST_HAS_EXPM1);
+   PRINT_MACRO(BOOST_HAS_FLOAT128);
    PRINT_MACRO(BOOST_HAS_FTIME);
    PRINT_MACRO(BOOST_HAS_GETSYSTEMTIMEASFILETIME);
    PRINT_MACRO(BOOST_HAS_GETTIMEOFDAY);
@@ -1125,6 +1126,7 @@ void print_boost_macros()
    PRINT_MACRO(BOOST_NO_VOID_RETURNS);
 
 
+
    // END GENERATED BLOCK
 
    PRINT_MACRO(BOOST_INTEL);

test/config_test.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Fri Jun 26 21:48:00 2015
+//  This file was automatically generated on Thu Aug 13 16:32:12 2015
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 
@@ -753,6 +753,11 @@ namespace boost_has_dirent_h = empty_boost;
 #else
 namespace boost_has_expm1 = empty_boost;
 #endif
+#ifdef BOOST_HAS_FLOAT128
+#include "boost_has_float128.ipp"
+#else
+namespace boost_has_float128 = empty_boost;
+#endif
 #ifdef BOOST_HAS_FTIME
 #include "boost_has_ftime.ipp"
 #else
@@ -1016,6 +1021,11 @@ int main( int, char *[] )
       std::cerr << "Failed test for BOOST_HAS_EXPM1 at: " << __FILE__ << ":" << __LINE__ << std::endl;
       ++error_count;
    }
+   if(0 != boost_has_float128::test())
+   {
+      std::cerr << "Failed test for BOOST_HAS_FLOAT128 at: " << __FILE__ << ":" << __LINE__ << std::endl;
+      ++error_count;
+   }
    if(0 != boost_has_ftime::test())
    {
       std::cerr << "Failed test for BOOST_HAS_FTIME at: " << __FILE__ << ":" << __LINE__ << std::endl;