intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 85 insertions, 0 deletions

diff --git a/build/scripts/link_lib.py b/build/scripts/link_lib.py
new file mode 100644
index 00000000000..344d50d4ebb
--- /dev/null
+++ b/build/scripts/link_lib.py
@@ -0,0 +1,85 @@
+import sys
+import subprocess
+import tempfile
+import os
+
+
+class Opts(object):
+    def __init__(self, args):
+        self.archiver = args[0]
+        self.arch_type = args[1]
+        self.llvm_ar_format = args[2]
+        self.build_root = args[3]
+        self.plugin = args[4]
+        self.output = args[5]
+        auto_input = args[6:]
+
+        if self.arch_type == 'GNU_AR':
+            self.create_flags = ['rcs']
+            self.modify_flags = ['-M']
+        elif self.arch_type == 'LLVM_AR':
+            self.create_flags = ['rcs', '-format=%s' % self.llvm_ar_format]
+            self.modify_flags = ['-M']
+        elif self.arch_type == 'LIBTOOL':
+            self.create_flags = ['-static', '-o']
+            self.modify_flags = []
+
+        need_modify = self.arch_type != 'LIBTOOL' and any(item.endswith('.a') for item in auto_input)
+        if need_modify:
+            self.objs = filter(lambda x: x.endswith('.o'), auto_input)
+            self.libs = filter(lambda x: x.endswith('.a'), auto_input)
+        else:
+            self.objs = auto_input
+            self.libs = []
+
+        self.plugin_flags = ['--plugin', self.plugin] if self.plugin != 'None' else []
+
+
+def get_opts(args):
+    return Opts(args)
+
+
+if __name__ == "__main__":
+    opts = get_opts(sys.argv[1:])
+
+    # There is a bug in llvm-ar. Some files with size slightly greater 2^32
+    # still have GNU format instead of GNU64 and cause link problems.
+    # Workaround just lowers llvm-ar's GNU64 threshold to 2^31.
+    if opts.arch_type == 'LLVM_AR':
+        os.environ['SYM64_THRESHOLD'] = '31'
+
+    def call():
+        try:
+            p = subprocess.Popen(cmd, stdin=stdin, cwd=opts.build_root)
+            rc = p.wait()
+            return rc
+        except OSError as e:
+            raise Exception('while running %s: %s' % (' '.join(cmd), e))
+
+    try:
+        os.unlink(opts.output)
+    except OSError:
+        pass
+
+    if not opts.libs:
+        cmd = [opts.archiver] + opts.create_flags + opts.plugin_flags + [opts.output] + opts.objs
+        stdin = None
+        exit_code = call()
+    else:
+        temp = tempfile.NamedTemporaryFile(dir=os.path.dirname(opts.output), delete=False)
+
+        with open(temp.name, 'w') as tmp:
+            tmp.write('CREATE {0}\n'.format(opts.output))
+            for lib in opts.libs:
+                tmp.write('ADDLIB {0}\n'.format(lib))
+            for obj in opts.objs:
+                tmp.write('ADDMOD {0}\n'.format(obj))
+            tmp.write('SAVE\n')
+            tmp.write('END\n')
+        cmd = [opts.archiver] + opts.modify_flags + opts.plugin_flags
+        stdin = open(temp.name)
+        exit_code = call()
+        os.remove(temp.name)
+
+    if exit_code != 0:
+        raise Exception('{0} returned non-zero exit code {1}. Stop.'.format(' '.join(cmd), exit_code))