Add cross platform build script

scripts/build.py

@@ -0,0 +1,67 @@
+#!/bin/env python
+#
+# Build script for CMAKE module
+#
+# Assumes FSLDIR is set. If FSLDEVDIR is also set, this will be used as the installation
+# prefix
+#
+# Note that arch is only currently used for Windows to set the correct VC compiler architecture
+
+import os, sys
+import shutil
+import traceback
+import stat
+
+def remove_readonly(func, path, excinfo):
+    os.chmod(path, stat.S_IWRITE)
+    func(path)
+
+def rmdir(d):
+    try:
+        shutil.rmtree(d, onerror=remove_readonly)
+    except:
+        print("Error removing %s" % d)
+        traceback.print_exc(limit=0)
+
+win = sys.platform.startswith("win")
+osx = sys.platform.startswith("darwin")
+
+if len(sys.argv) < 3:
+    print("Usage: build.py <type> <arch> [--install]")
+    sys.exit(1)
+
+build_type = sys.argv[1]
+arch = sys.argv[2]
+install = "--install" in sys.argv
+
+rootdir = os.path.abspath(os.path.join(os.path.dirname(__file__), os.pardir))
+builddir = os.path.join(rootdir, "build_%s" % build_type)
+rmdir(builddir)
+os.makedirs(builddir)
+cwd = os.getcwd()
+os.chdir(builddir)
+
+cmake_opts = "-DCMAKE_BUILD_TYPE=%s" % build_type
+if install:
+    installdir = os.environ.get("FSLDEVDIR", os.environ["FSLDIR"])  
+    cmake_opts += ' -DCMAKE_INSTALL_PREFIX="%s"' % installdir
+
+if win:
+    if "VCINSTALLDIR" not in os.environ:
+        print("You must run this script from the Visual Studio tools command line")
+        sys.exit(1)
+    os.system('"%s/vcvarsall" %s' % (os.environ["VCINSTALLDIR"], arch))
+    cmake_opts += ' -G "NMake Makefiles"'
+    make = "nmake"
+else:
+    make = "make"
+
+os.system("cmake .. %s" % cmake_opts)
+os.system(make)
+if install:
+    os.system("%s install" % make)
+else:
+    os.system(make)
+
+os.chdir(cwd)
+