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Check mtime to avoid recreating existing so

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This commit is contained in:
Théophile Bastian 2018-04-26 19:15:37 +02:00
parent 353a97c49d
commit be221f68d5
1 changed files with 17 additions and 4 deletions
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21
generate_eh_elf.py
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@ -79,6 +79,17 @@ def gen_eh_elf(obj_path, out_dir=None):
print("> {}...".format(os.path.basename(obj_path)))
out_base_name = os.path.basename(obj_path) + '.eh_elf'
out_so_path = os.path.join(out_dir, (out_base_name + '.so'))
try:
so_mtime = os.path.getmtime(out_so_path)
obj_mtime = os.path.getmtime(obj_path)
if obj_mtime < so_mtime:
return # The object is recent enough, no need to recreate it
except OSError:
pass
with tempfile.TemporaryDirectory() as compile_dir:
# Generate the C source file
@ -89,14 +100,16 @@ def gen_eh_elf(obj_path, out_dir=None):
# Compile it into a .o
print("\tCompiling into .o…")
o_path = os.path.join(compile_dir, (out_base_name + '.o'))
if subprocess.call([CXX_BIN, '-o', o_path, '-c', c_path,
'-O3', '-fPIC']) != 0:
call_rc = subprocess.call(
[CXX_BIN, '-o', o_path, '-c', c_path, '-O3', '-fPIC'])
if call_rc != 0:
raise Exception("Failed to compile to a .o file")
# Compile it into a .so
print("\tCompiling into .so…")
so_path = os.path.join(out_dir, (out_base_name + '.so'))
if subprocess.call([CXX_BIN, '-o', so_path, '-shared', o_path]) != 0:
call_rc = subprocess.call(
[CXX_BIN, '-o', out_so_path, '-shared', o_path])
if call_rc != 0:
raise Exception("Failed to compile to a .so file")