[libc++] Move the linker script generation step to CMake

Summary:
This allows the linker script generation to query CMake properties
(specifically the dependencies of libc++.so) instead of having to
carry these dependencies around manually in global variables. Notice
the removal of the LIBCXX_INTERFACE_LIBRARIES global variable.

Reviewers: phosek, EricWF

Subscribers: mgorny, christof, jkorous, dexonsmith, libcxx-commits

Tags: #libc

Differential Revision: https://reviews.llvm.org/D68343

llvm-svn: 374116

1 files changed, 0 insertions, 58 deletions

diff --git a/libcxx/utils/gen_link_script.py b/libcxx/utils/gen_link_script.py
deleted file mode 100755
index eaa752d5ae2..00000000000
--- a/libcxx/utils/gen_link_script.py
+++ /dev/null
@@ -1,58 +0,0 @@
-#!/usr/bin/env python
-#===----------------------------------------------------------------------===##
-#
-# Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-# See https://llvm.org/LICENSE.txt for license information.
-# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-#
-#===----------------------------------------------------------------------===##
-
-"""
-Generate a linker script that links libc++ to the proper ABI library.
-An example script for c++abi would look like "INPUT(libc++.so.1 -lc++abi)".
-"""
-
-import argparse
-import os
-import sys
-
-
-def main():
-    parser = argparse.ArgumentParser(description=__doc__)
-    parser.add_argument("--dryrun", help="Don't write any output",
-                        action="store_true", default=False)
-    parser.add_argument("--rename", action="store_true", default=False,
-                        help="Rename the output as input so we can replace it")
-    parser.add_argument("--input", help="Path to libc++ library", required=True)
-    parser.add_argument("--output", help="Path to libc++ linker script",
-                        required=True)
-    parser.add_argument("libraries", nargs="+",
-                        help="List of libraries libc++ depends on")
-    args = parser.parse_args()
-
-    # Use the relative path for the libc++ library.
-    libcxx = os.path.relpath(args.input, os.path.dirname(args.output))
-
-    # Prepare the list of public libraries to link.
-    public_libs = ['-l%s' % l for l in args.libraries]
-
-    # Generate the linker script contents.
-    contents = "INPUT(%s)" % ' '.join([libcxx] + public_libs)
-
-    if args.dryrun:
-        print("GENERATING SCRIPT: '%s' as file %s" % (contents, args.output))
-        return 0
-
-    # Remove the existing libc++ symlink if it exists.
-    if os.path.islink(args.output):
-        os.unlink(args.output)
-
-    # Replace it with the linker script.
-    with open(args.output, 'w') as f:
-        f.write(contents + "\n")
-
-    return 0
-
-
-if __name__ == '__main__':
-    sys.exit(main())