[FL-2052] New build system based on scons (#1269)

site_scons/site_tools/crosscc.py

@@ -0,0 +1,72 @@
+from SCons.Tool import asm
+from SCons.Tool import gcc
+from SCons.Tool import gxx
+from SCons.Tool import ar
+from SCons.Tool import gnulink
+import strip
+import gdb
+import objdump
+
+from SCons.Action import _subproc
+import subprocess
+
+
+def prefix_commands(env, command_prefix, cmd_list):
+    for command in cmd_list:
+        if command in env:
+            env[command] = command_prefix + env[command]
+
+
+def _get_tool_version(env, tool):
+    verstr = "version unknown"
+    proc = _subproc(
+        env,
+        env.subst("${%s} --version" % tool),
+        stdout=subprocess.PIPE,
+        stderr="devnull",
+        stdin="devnull",
+        universal_newlines=True,
+        error="raise",
+        shell=True,
+    )
+    if proc:
+        verstr = proc.stdout.readline()
+        proc.communicate()
+    return verstr
+
+
+def generate(env, **kw):
+    for orig_tool in (asm, gcc, gxx, ar, gnulink, strip, gdb, objdump):
+        orig_tool.generate(env)
+    env.SetDefault(
+        TOOLCHAIN_PREFIX=kw.get("toolchain_prefix"),
+    )
+    prefix_commands(
+        env,
+        env.subst("$TOOLCHAIN_PREFIX"),
+        [
+            "AR",
+            "AS",
+            "CC",
+            "CXX",
+            "OBJCOPY",
+            "RANLIB",
+            "STRIP",
+            "GDB",
+            "GDBPY",
+            "OBJDUMP",
+        ],
+    )
+    # Call CC to check version
+    if whitelisted_versions := kw.get("versions", ()):
+        cc_version = _get_tool_version(env, "CC")
+        # print("CC version =", cc_version)
+        # print(list(filter(lambda v: v in cc_version, whitelisted_versions)))
+        if not any(filter(lambda v: v in cc_version, whitelisted_versions)):
+            raise Exception(
+                f"Toolchain version is not supported. Allowed: {whitelisted_versions}, toolchain: {cc_version} "
+            )
+
+
+def exists(env):
+    return True