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mk: Generate a .def file for rustc_llvm on MSVC
Windows needs explicit exports of functions from DLLs but LLVM does not mention any of its symbols as being export-able from a DLL. The compiler, however, relies on being able to use LLVM symbols across DLL boundaries so we need to force many of LLVM's symbols to be exported from `rustc_llvm.dll`. This commit adds support for generation of a `rustc_llvm.def` file which is passed along to the linker when generating `rustc_llvm.dll` which should keep all these symbols exportable and usable.
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# Copyright 2015 The Rust Project Developers. See the COPYRIGHT | ||
# file at the top-level directory of this distribution and at | ||
# http://rust-lang.org/COPYRIGHT. | ||
# | ||
# Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or | ||
# http://www.apache.org/licenses/LICENSE-2.0> or the MIT license | ||
# <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your | ||
# option. This file may not be copied, modified, or distributed | ||
# except according to those terms. | ||
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import sys | ||
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input_file = sys.argv[1] | ||
output_file = sys.argv[2] | ||
name = sys.argv[3] | ||
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with open(input_file, 'r') as f: | ||
with open(output_file, 'w') as g: | ||
print >> g, 'LIBRARY ' + name | ||
print >> g, 'EXPORTS' | ||
for x in f: | ||
x = str(x) | ||
if not x.startswith(' pub fn LLVM'): continue | ||
name = x[11:x.find('(')] | ||
print >> g, ' ' + name |