scons: Build NIR.

Emil Velikov:
 - Attribute the src/{glsl,compiler}/nir move
 - Flesh out to separate SConscript

Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
Reviewed-by: Jose Fonseca <jfonseca@vmware.com>
diff --git a/src/compiler/SConscript b/src/compiler/SConscript
index 8969d82..10c79c4 100644
--- a/src/compiler/SConscript
+++ b/src/compiler/SConscript
@@ -22,3 +22,4 @@
 Export('compiler')
 
 SConscript('SConscript.glsl')
+SConscript('SConscript.nir')
diff --git a/src/compiler/SConscript.nir b/src/compiler/SConscript.nir
new file mode 100644
index 0000000..51cc0d4
--- /dev/null
+++ b/src/compiler/SConscript.nir
@@ -0,0 +1,73 @@
+import common
+
+Import('*')
+
+from sys import executable as python_cmd
+
+env = env.Clone()
+
+env.MSVC2013Compat()
+
+env.Prepend(CPPPATH = [
+    '#include',
+    '#src',
+    '#src/mapi',
+    '#src/mesa',
+    '#src/gallium/include',
+    '#src/gallium/auxiliary',
+    '#src/compiler/nir',
+])
+
+# Make generated headers reachable from the include path.
+env.Prepend(CPPPATH = [Dir('.').abspath, Dir('nir').abspath])
+
+# nir generated sources
+
+nir_builder_opcodes_h = env.CodeGenerate(
+    target = 'nir/nir_builder_opcodes.h',
+    script = 'nir/nir_builder_opcodes_h.py',
+    source = [],
+    command = python_cmd + ' $SCRIPT > $TARGET'
+)
+
+env.CodeGenerate(
+    target = 'nir/nir_constant_expressions.c',
+    script = 'nir/nir_constant_expressions.py',
+    source = [],
+    command = python_cmd + ' $SCRIPT > $TARGET'
+)
+
+env.CodeGenerate(
+    target = 'nir/nir_opcodes.h',
+    script = 'nir/nir_opcodes_h.py',
+    source = [],
+    command = python_cmd + ' $SCRIPT > $TARGET'
+)
+
+env.CodeGenerate(
+    target = 'nir/nir_opcodes.c',
+    script = 'nir/nir_opcodes_c.py',
+    source = [],
+    command = python_cmd + ' $SCRIPT > $TARGET'
+)
+
+env.CodeGenerate(
+    target = 'nir/nir_opt_algebraic.c',
+    script = 'nir/nir_opt_algebraic.py',
+    source = [],
+    command = python_cmd + ' $SCRIPT > $TARGET'
+)
+
+# parse Makefile.sources
+source_lists = env.ParseSourceList('Makefile.sources')
+
+nir_sources = source_lists['NIR_FILES']
+nir_sources += source_lists['NIR_GENERATED_FILES']
+
+nir = env.ConvenienceLibrary(
+    target = 'nir',
+    source = nir_sources,
+)
+
+env.Alias('nir', nir)
+Export('nir')