From db4fa08d4da3cc840e6f97e6869a877f2b4c9474 Mon Sep 17 00:00:00 2001
From: David Robillard <d@drobilla.net>
Date: Sat, 22 Sep 2018 10:24:26 +0200
Subject: Squashed 'waflib/' content from commit 6e726eb

git-subtree-dir: waflib
git-subtree-split: 6e726eb11d3e21be410549d27dd1aa94678f3d09
---
 extras/c_emscripten.py | 87 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 87 insertions(+)
 create mode 100644 extras/c_emscripten.py

(limited to 'extras/c_emscripten.py')

diff --git a/extras/c_emscripten.py b/extras/c_emscripten.py
new file mode 100644
index 0000000..e1ac494
--- /dev/null
+++ b/extras/c_emscripten.py
@@ -0,0 +1,87 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 vi:ts=4:noexpandtab
+
+import subprocess, shlex, sys
+
+from waflib.Tools import ccroot, gcc, gxx
+from waflib.Configure import conf
+from waflib.TaskGen import after_method, feature
+
+from waflib.Tools.compiler_c import c_compiler
+from waflib.Tools.compiler_cxx import cxx_compiler
+
+for supported_os in ('linux', 'darwin', 'gnu', 'aix'):
+	c_compiler[supported_os].append('c_emscripten')
+	cxx_compiler[supported_os].append('c_emscripten')
+
+
+@conf
+def get_emscripten_version(conf, cc):
+	"""
+	Emscripten doesn't support processing '-' like clang/gcc
+	"""
+
+	dummy = conf.cachedir.parent.make_node("waf-emscripten.c")
+	dummy.write("")
+	cmd = cc + ['-dM', '-E', '-x', 'c', dummy.abspath()]
+	env = conf.env.env or None
+	try:
+		p = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, env=env)
+		out = p.communicate()[0]
+	except Exception as e:
+		conf.fatal('Could not determine emscripten version %r: %s' % (cmd, e))
+
+	if not isinstance(out, str):
+		out = out.decode(sys.stdout.encoding or 'latin-1')
+
+	k = {}
+	out = out.splitlines()
+	for line in out:
+		lst = shlex.split(line)
+		if len(lst)>2:
+			key = lst[1]
+			val = lst[2]
+			k[key] = val
+
+	if not ('__clang__' in k and 'EMSCRIPTEN' in k):
+		conf.fatal('Could not determine the emscripten compiler version.')
+
+	conf.env.DEST_OS = 'generic'
+	conf.env.DEST_BINFMT = 'elf'
+	conf.env.DEST_CPU = 'asm-js'
+	conf.env.CC_VERSION = (k['__clang_major__'], k['__clang_minor__'], k['__clang_patchlevel__'])
+	return k
+
+@conf
+def find_emscripten(conf):
+	cc = conf.find_program(['emcc'], var='CC')
+	conf.get_emscripten_version(cc)
+	conf.env.CC = cc
+	conf.env.CC_NAME = 'emscripten'
+	cxx = conf.find_program(['em++'], var='CXX')
+	conf.env.CXX = cxx
+	conf.env.CXX_NAME = 'emscripten'
+	conf.find_program(['emar'], var='AR')
+
+def configure(conf):
+	conf.find_emscripten()
+	conf.find_ar()
+	conf.gcc_common_flags()
+	conf.gxx_common_flags()
+	conf.cc_load_tools()
+	conf.cc_add_flags()
+	conf.cxx_load_tools()
+	conf.cxx_add_flags()
+	conf.link_add_flags()
+	conf.env.ARFLAGS = ['rcs']
+	conf.env.cshlib_PATTERN = '%s.js'
+	conf.env.cxxshlib_PATTERN = '%s.js'
+	conf.env.cstlib_PATTERN = '%s.a'
+	conf.env.cxxstlib_PATTERN = '%s.a'
+	conf.env.cprogram_PATTERN = '%s.html'
+	conf.env.cxxprogram_PATTERN = '%s.html'
+	conf.env.CXX_TGT_F           = ['-c', '-o', '']
+	conf.env.CC_TGT_F            = ['-c', '-o', '']
+	conf.env.CXXLNK_TGT_F        = ['-o', '']
+	conf.env.CCLNK_TGT_F         = ['-o', '']
+	conf.env.append_value('LINKFLAGS',['-Wl,--enable-auto-import'])
-- 
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