Fix pip from source build testing

Change-Id: I83da21eae64ac2972f19689186d579b6955fd89b

Author: TimotheusBachinger

tests/system/singlesite/omd/test_python.py

@@ -140,14 +140,28 @@ def test_03_pip_interpreter_version(site: Site, pip_cmd: PipCommand) -> None:
 
 
 def test_04_pip_user_can_install_non_wheel_packages(site: Site) -> None:
-    # ibm_db must be compiled from source, so choosing this also ensures that the Python headers
-    # can be found by pip
+    # ibm_db is compiled from source, so choosing this also ensures that the Python headers can be
+    # found by pip. Note that ibm_db publishes prebuilt manylinux wheels which pip prefers over the
+    # sdist, so --no-binary is what actually makes this a source build.
     package_name = "ibm_db"
+    # Do not downgrade: releases before 3.3.0 miss an `#include <wctype.h>` and do not compile with
+    # current gcc, and releases before 3.2.5 still use Python APIs that were removed in 3.12.
+    package_spec = f"{package_name}==3.3.0"
+    # ibm_db downloads its native CLI driver while building, by default the latest one. Pin it, as
+    # newer drivers are built against GLIBC_2.32 and cannot be loaded on our older distros, whereas
+    # v11.5.9 needs at most GLIBC_2.14.
+    clidriver_version = "v11.5.9"
 
     # We're testing this only for one supported pip command as building from source just takes too long
     pip_cmd = PipCommand(["pip3"], False)
 
-    assert_install_package(pip_cmd.command + ["install", package_name], package_name, site)
+    assert_install_package(
+        ["env", f"CLIDRIVER_VERSION={clidriver_version}"]
+        + pip_cmd.command
+        + ["install", "--no-binary", package_name, package_spec],
+        package_name,
+        site,
+    )
     assert_local_package_install_path(site, package_name, _local_package_installation_path(site))
     assert_uninstall_and_purge_cache(pip_cmd, package_name, site)