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[CMake] Add Python script to generate version script symbol exports 

Using a Python script instead of the various shell commands means that
it is now possible to cross compile LLVM for Linux on Windows.

Differential Revision: https://reviews.llvm.org/D136092
This commit is contained in:
Andrew Ng 2022-09-26 15:10:13 +01:00
parent 9572406bbc
commit 1e29766314
2 changed files with 27 additions and 5 deletions
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6
llvm/cmake/modules/AddLLVM.cmake
View File

@ -103,11 +103,7 @@ function(add_llvm_symbol_exports target_name export_file)
# FIXME: Don't write the "local:" line on OpenBSD.
# in the export file, also add a linker script to version LLVM symbols (form: LLVM_N.M)
add_custom_command(OUTPUT ${native_export_file}
COMMAND echo "LLVM_${LLVM_VERSION_MAJOR} {" > ${native_export_file}
COMMAND grep -q "[[:alnum:]]" ${export_file} && echo " global:" >> ${native_export_file} || :
COMMAND sed -e "s/$/;/" -e "s/^/ /" < ${export_file} >> ${native_export_file}
COMMAND echo " local: *;" >> ${native_export_file}
COMMAND echo "};" >> ${native_export_file}
COMMAND "${Python3_EXECUTABLE}" ${LLVM_MAIN_SRC_DIR}/utils/add_llvm_symbol_exports.py ${LLVM_VERSION_MAJOR} ${export_file} ${native_export_file}
DEPENDS ${export_file}
VERBATIM
COMMENT "Creating export file for ${target_name}")

26
llvm/utils/add_llvm_symbol_exports.py Normal file
View File

@ -0,0 +1,26 @@
#!/usr/bin/env python3
#===----------------------------------------------------------------------===##
#
# 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
#
#===----------------------------------------------------------------------===##
import os
import sys
if (len(sys.argv) != 4):
print('usage: ' + sys.argv[0] + ' <LLVM major version> <input> <output>')
sys.exit(1)
with open(sys.argv[3], 'w') as out_fd:
out_fd.write('LLVM_' + sys.argv[1] + ' {\n')
if os.stat(sys.argv[2]).st_size > 0:
out_fd.write(' global:\n')
with open(sys.argv[2], 'r') as in_fd:
for e in in_fd.readlines():
out_fd.write(' ' + e.rstrip() + ';\n')
out_fd.write(' local: *;\n};\n')
sys.exit(0)