Merge pull request #303009 from baloo/baloo/tpm2-pytss/fixup-cross-compilation

diff --git a/setup.py b/setup.py

index 1b5f513..d660b9a 100644

--- a/setup.py

+++ b/setup.py

@@ -184,7 +184,8 @@ class type_generator(build_ext):

                 f"unable to find tss2_tpm2_types.h in {pk['include_dirs']}"

             )

         pdata = preprocess_file(

-            header_path, cpp_args=["-D__extension__=", "-D__attribute__(x)="]

+            header_path, cpp_args=["-D__extension__=", "-D__attribute__(x)="],

+            cpp_path="@crossPrefix@-cpp",

         )

         parser = c_parser.CParser()

         ast = parser.parse(pdata, "tss2_tpm2_types.h")

@@ -210,6 +211,7 @@ class type_generator(build_ext):

                         "-D__float128=long double",

                         "-D_FORTIFY_SOURCE=0",

                     ],

+                    cpp_path="@crossPrefix@-cpp",

                 )

                 parser = c_parser.CParser()

                 past = parser.parse(pdata, "tss2_policy.h")

{ lib

, stdenv

, substituteAll

, buildPythonPackage

, fetchPypi

, pythonOlder

, swtpm

}:

let

  isCross = (stdenv.buildPlatform != stdenv.hostPlatform);

in

buildPythonPackage rec {

  pname = "tpm2-pytss";

  version = "2.2.1";

  patches = [

    # Fix hardcoded `fapi-config.json` configuration path

    ./fapi-config.patch

  ] ++ lib.optionals isCross [

    # pytss will regenerate files from headers of tpm2-tss.

    # Those headers are fed through a compiler via pycparser. pycparser expects `cpp`

    # to be in the path.

    # This is put in the path via stdenv when not cross-compiling, but this is absent

    # when cross-compiling is turned on.

    # This patch changes the call to pycparser.preprocess_file to provide the name

    # of the cross-compiling cpp

    (substituteAll {

      src = ./cross.patch;

      crossPrefix = stdenv.hostPlatform.config;

    })

  ];

  postPatch = ''