Use boost::filesystem::path::string() with std::ofstream for portability

Author: ashtum

test/Jamfile

@@ -49,7 +49,6 @@ local requirements =
     <toolset>msvc:<define>_SILENCE_CXX17_ALLOCATOR_VOID_DEPRECATION_WARNING
     <toolset>msvc:<define>_SILENCE_CXX17_ADAPTOR_TYPEDEFS_DEPRECATION_WARNING
     <toolset>msvc,<variant>release:<cxxflags>"/Ob2 /Oi /Ot"
-    <toolset>gcc-mingw:<cxxflags>-Wa,-mbig-obj
     <target-os>linux:<define>_XOPEN_SOURCE=600
     <target-os>linux:<define>_GNU_SOURCE=1
     <target-os>solaris:<define>_XOPEN_SOURCE=500
@@ -59,6 +58,7 @@ local requirements =
     <target-os>windows:<define>_WIN32_WINNT=0x0A00
     <target-os>windows,<toolset>gcc:<library>ws2_32
     <target-os>windows,<toolset>gcc:<library>mswsock
+    <target-os>windows,<toolset>gcc:<cxxflags>"-Wa,-mbig-obj"
     <target-os>windows,<toolset>gcc-cygwin:<define>__USE_W32_SOCKETS
     <target-os>hpux,<toolset>gcc:<define>_XOPEN_SOURCE_EXTENDED
     <target-os>hpux:<library>ipv6

test/beast/core/file_test.hpp

@@ -112,8 +112,8 @@ test_file()
         [](fs::path const& path)
         {
             // no exceptions - failure will result in an empty string
-            std::ifstream in;
-            in.open(path.native());
+            fs::ifstream in;
+            in.open(path);
             noskipws(in);
             auto s = std::string(
                 std::istream_iterator<char>(in),

test/beast/http/file_body.cpp

@@ -168,7 +168,7 @@ class file_body_test : public beast::unit_test::suite
             "0123456789"; // 40
         // create the temporary file
         {
-            std::ofstream fstemp(temp.path().native());
+            std::ofstream fstemp(temp.path().string());
             std::size_t written = 0;
             std::size_t to_write = 4097;
             while (written < to_write)
@@ -223,7 +223,7 @@ class file_body_test : public beast::unit_test::suite
                 "0123456789"; // 40
         // create the temporary file
         {
-            std::ofstream fstemp(temp.path().native());
+            std::ofstream fstemp(temp.path().string());
             std::size_t written = 0;
             std::size_t to_write = 2048;
             while (written < to_write)