buildtools: fix archive extraction for LLVM 8

"llvm-ar xv lib.a" from LLVM 8 doesn't print extracted object file
names. The effect of "v" is not formally specified either.
Use "llvm-ar t" to get archive member names.

Reported-by: Xueming Zhang <xuemingx.zhang@intel.com>
Signed-off-by: Dmitry Kozlyuk <dmitry.kozliuk@gmail.com>

diff --git a/buildtools/gen-pmdinfo-cfile.py b/buildtools/gen-pmdinfo-cfile.py
index a4e0801..58fe3ad 100644 (file)
--- a/buildtools/gen-pmdinfo-cfile.py
+++ b/buildtools/gen-pmdinfo-cfile.py
@@ -9,11 +9,12 @@ import tempfile
 
 _, tmp_root, ar, archive, output, *pmdinfogen = sys.argv
 with tempfile.TemporaryDirectory(dir=tmp_root) as temp:
-    proc = subprocess.run(
-        # Don't use "ar p", because its output is corrupted on Windows.
-        [ar, "xv", os.path.abspath(archive)], stdout=subprocess.PIPE, check=True, cwd=temp
+    run_ar = lambda command: subprocess.run(
+        [ar, command, os.path.abspath(archive)],
+        stdout=subprocess.PIPE, check=True, cwd=temp
     )
-    lines = proc.stdout.decode().splitlines()
-    names = [line[len("x - ") :] for line in lines]
+    # Don't use "ar p", because its output is corrupted on Windows.
+    run_ar("x")
+    names = run_ar("t").stdout.decode().splitlines()
     paths = [os.path.join(temp, name) for name in names]
     subprocess.run(pmdinfogen + paths + [output], check=True)