diff -r 2935441b0870 -r d23589f0026f ext/fputils/SConscript
--- a/ext/fputils/SConscript	Mon Sep 30 12:20:53 2013 +0200
+++ b/ext/fputils/SConscript	Tue Oct 01 11:10:42 2013 +0100
@@ -30,11 +30,19 @@
 
 Import('main')
 
-main.Library('fputils', [
-        main.SharedObject('fp80.c'),
+main.Prepend(CPPPATH=Dir('./include'))
+
+fpenv = main.Clone()
+
+# By default gcc uses c89 and clang uses c99. For fputils to compile
+# we need to use c99.
+if fpenv['GCC']:
+    fpenv.Append(CCFLAGS=['-std=c99'])
+
+fpenv.Library('fputils', [
+        fpenv.SharedObject('fp80.c'),
     ])
 
-main.Prepend(CPPPATH=Dir('./include'))
 main.Append(LIBS=['fputils'])
 main.Prepend(LIBPATH=[Dir('.')])