fix static lib search when cross compiling

recipe/support_new_cuda_layout.diff

@@ -11,23 +11,30 @@ index 914b62c00..6363c6b91 100644
      print('NVTX could not be found')
      return None
 diff --git a/install/cupy_builder/cupy_setup_build.py b/install/cupy_builder/cupy_setup_build.py
-index d53ceccec..147dec2fd 100644
+index d53ceccec..6c065dc02 100644
 --- a/install/cupy_builder/cupy_setup_build.py
 +++ b/install/cupy_builder/cupy_setup_build.py
-@@ -260,20 +260,22 @@ def _rpath_base():
+@@ -260,20 +260,28 @@ def _rpath_base():
  def _find_static_library(name: str) -> str:
      if PLATFORM_LINUX:
          filename = f'lib{name}.a'
 -        libdir = 'lib64'
-+        libdirs = ['lib64', 'lib']
++        if int(os.environ.get('CONDA_BUILD_CROSS_COMPILATION', 0)) == 1:
++            libdirs = ['lib']
++            cuda_path = f'{os.environ["PREFIX"]}/targets/'
++                        f'{build.conda_get_target_name()}/'
++        else:
++            libdirs = ['lib64', 'lib']
++            cuda_path = build.get_cuda_path()
      elif PLATFORM_WIN32:
          filename = f'{name}.lib'
 -        libdir = 'lib\\x64'
 +        libdirs = ['lib\\x64', 'lib']
++        cuda_path = build.get_cuda_path()
      else:
          raise Exception('not supported on this platform')
 
-     cuda_path = build.get_cuda_path()
+-    cuda_path = build.get_cuda_path()
      if cuda_path is None:
          raise Exception(f'Could not find {filename}: CUDA path unavailable')
 -    path = os.path.join(cuda_path, libdir, filename)
@@ -42,7 +49,7 @@ index d53ceccec..147dec2fd 100644
 
 
  def make_extensions(ctx: Context, compiler, use_cython):
-@@ -317,16 +319,42 @@ def make_extensions(ctx: Context, compiler, use_cython):
+@@ -317,16 +325,42 @@ def make_extensions(ctx: Context, compiler, use_cython):
          settings['define_macros'].append(('__HIP_PLATFORM_HCC__', '1'))
      settings['define_macros'].append(('CUPY_CACHE_KEY', ctx.cupy_cache_key))