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# -*- Python -*-
"""Skylark macros for MKL.
if_mkl is a conditional to check if MKL is enabled or not.
mkl_repository is a repository rule for creating MKL repository rule that can
be pointed to either a local folder, or download it from the internet.
mkl_repository depends on the following environment variables:
* `TF_MKL_ROOT`: The root folder where a copy of libmkl is located.
"""
_TF_MKL_ROOT = "TF_MKL_ROOT"
def if_mkl(if_true, if_false = []):
"""Shorthand for select()'ing on whether we're building with MKL.
Returns a select statement which evaluates to if_true if we're building
with MKL enabled. Otherwise, the select statement evaluates to if_false.
"""
return select({
"//third_party/mkl:using_mkl": if_true,
"//conditions:default": if_false
})
def _enable_local_mkl(repository_ctx):
return _TF_MKL_ROOT in repository_ctx.os.environ
def _mkl_autoconf_impl(repository_ctx):
"""Implementation of the local_mkl_autoconf repository rule."""
if _enable_local_mkl(repository_ctx):
# Symlink lib and include local folders.
mkl_root = repository_ctx.os.environ[_TF_MKL_ROOT]
mkl_lib_path = "%s/lib" % mkl_root
repository_ctx.symlink(mkl_lib_path, "lib")
mkl_include_path = "%s/include" % mkl_root
repository_ctx.symlink(mkl_include_path, "include")
mkl_license_path = "%s/license.txt" % mkl_root
repository_ctx.symlink(mkl_license_path, "license.txt")
else:
# setup remote mkl repository.
repository_ctx.download_and_extract(
repository_ctx.attr.urls,
sha256=repository_ctx.attr.sha256,
stripPrefix=repository_ctx.attr.strip_prefix,
)
# Also setup BUILD file.
repository_ctx.symlink(repository_ctx.attr.build_file, "BUILD")
mkl_repository = repository_rule(
implementation = _mkl_autoconf_impl,
environ = [
_TF_MKL_ROOT,
],
attrs = {
"build_file": attr.label(),
"repository": attr.string(),
"urls": attr.string_list(default = []),
"sha256": attr.string(default = ""),
"strip_prefix": attr.string(default = ""),
},
)
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