redhat-rpm-config/llvm-lto-elf-check

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#!/usr/bin/python3
# Check an llvm bcanalyzer dump for -flto
# This script implements the following command in python
# to avoid PCRE backtrace limits in grep.
# grep -xP '.*\-flto((?!-fno-lto).)*' <input file>
import re
import sys
def open_input_file():
if len(sys.argv) > 1:
f = open(sys.argv[1], "r")
else:
f = sys.stdin
if not f:
raise Exception("Could not open input file")
return f
def match_lto(input_lines):
match_found = False
for line in input_lines:
match = re.match(r"^.*\-flto((?!-fno-lto).)*$", line)
if match:
match_found = True
print(f"{match.group(0)}")
return match_found
def main():
input_file = open_input_file()
input_lines = input_file.readlines()
if input_file != sys.stdin:
input_file.close()
if match_lto(input_lines):
sys.exit(0)
sys.exit(1)
main()