[BACKPORT 2.21.0][DEVOPS-3023] Packaging: Use ldd to determine glibc …

…version instead of scanning binaries.

Summary:
Original commit: 01b596f / D33073
Use ldd to determine glibc version instead of scanning binaries.
Scanning binaries doens't work as there may not be any symbols tagged with the most recent
required glibc.

Test Plan: Jenkins: build only

Reviewers: devops, steve.varnau

Reviewed By: steve.varnau

Subscribers: devops

Tags: #jenkins-ready

Differential Revision: https://phorge.dev.yugabyte.com/D33111

python/yugabyte/gen_version_info.py

@@ -70,6 +70,12 @@ def boolean_to_json_str(bool_flag: bool) -> str:
     return str(bool_flag).lower()
 
 
+def get_glibc_version() -> str:
+    glibc_v = subprocess.check_output('ldd --version', shell=True).decode('utf-8').strip()
+    # We only want the version
+    return glibc_v.split("\n")[0].split()[-1]
+
+
 def get_git_sha1(git_repo_dir: str) -> Optional[str]:
     try:
         sha1 = subprocess.check_output(
@@ -187,6 +193,11 @@ def main() -> int:
             "platform": os_platform,
             "architecture": architecture
             }
+
+    # Record our glibc version.  This doesn't apply to mac/darwin.
+    if os_platform == 'linux':
+        data["glibc_v"] = get_glibc_version()
+
     content = json.dumps(data)
 
     # Frequently getting errors here when rebuilding on NFS: