From 5fc50bf9ae2ee8a1faf90a9c8890182d1f192c20 Mon Sep 17 00:00:00 2001
From: Jyrki Vesterinen <sandgtx@gmail.com>
Date: Thu, 22 Dec 2016 22:27:30 +0200
Subject: [PATCH] SCons version of commit 7968f7ba

---
 SConstruct        | 10 +++++++++-
 scons/ieee_754.py | 10 ++++++++++
 2 files changed, 19 insertions(+), 1 deletion(-)
 create mode 100644 scons/ieee_754.py

diff --git a/SConstruct b/SConstruct
index 2525839969c9..e77c01b45cdf 100755
--- a/SConstruct
+++ b/SConstruct
@@ -306,7 +306,7 @@ def Warning(message):
 
 from metasconf import init_metasconf
 configure_args = dict(
-    custom_tests = init_metasconf(env, ["cplusplus", "python_devel", "sdl", "boost", "pango", "pkgconfig", "gettext", "lua"]),
+    custom_tests = init_metasconf(env, ["ieee_754", "cplusplus", "python_devel", "sdl", "boost", "pango", "pkgconfig", "gettext", "lua"]),
     config_h = "$build_dir/config.h",
     log_file="$build_dir/config.log", conf_dir="$build_dir/sconf_temp")
 
@@ -331,6 +331,13 @@ if env["prereqs"]:
     conf.CheckLib("m")
     conf.CheckFunc("round")
 
+    def CheckIEEE754(conf):
+        if not env["host"]:
+            return conf.CheckIEEE754()
+        else:
+            Warning("You are cross-compiling. Skipping IEEE 754 test.")
+            return True
+
     def CheckAsio(conf):
         if env["PLATFORM"] == 'win32':
             conf.env.Append(LIBS = ["libws2_32"])
@@ -349,6 +356,7 @@ if env["prereqs"]:
             conf.CheckSDL("SDL2_image", header_file = "SDL_image")
 
     have_server_prereqs = (\
+        CheckIEEE754(conf) & \
         conf.CheckCPlusPlus(gcc_version = "4.8") & \
         conf.CheckBoost("iostreams", require_version = boost_version) & \
         conf.CheckBoostIostreamsGZip() & \
diff --git a/scons/ieee_754.py b/scons/ieee_754.py
new file mode 100644
index 000000000000..80dd8677d7c2
--- /dev/null
+++ b/scons/ieee_754.py
@@ -0,0 +1,10 @@
+import os.path
+
+def CheckIEEE754(context):
+    context.Message("Checking if floating point numbers are in the IEEE 754 format... ")
+    test_file = open(os.path.join("src", "compile_time_tests", "ieee_754.cpp"))
+    ret, _ = context.TryRun(test_file.read(), ".cpp")
+    context.Result(ret)
+    return ret
+
+config_checks = { "CheckIEEE754" : CheckIEEE754 }