bazel/glog.bzl - third_party/glog - Git at Google

 # Implement a macro glog_library() that the BUILD.bazel file can load.

 # By default, glog is built with gflags support.  You can change this behavior
 # by using glog_library(with_gflags=0)
 #
 # This file is inspired by the following sample BUILD files:
 #       https://github.com/google/glog/issues/61
 #       https://github.com/google/glog/files/393474/BUILD.txt
 #
 # Known issue: the namespace parameter is not supported on Win32.

 def expand_template_impl(ctx):
     ctx.actions.expand_template(
         template = ctx.file.template,
         output = ctx.outputs.out,
         substitutions = ctx.attr.substitutions,
     )

 expand_template = rule(
     implementation = expand_template_impl,
     attrs = {
         "template": attr.label(mandatory = True, allow_single_file = True),
         "substitutions": attr.string_dict(mandatory = True),
         "out": attr.output(mandatory = True),
     },
 )

 def dict_union(x, y):
     z = {}
     z.update(x)
     z.update(y)
     return z

 def glog_library(namespace = "google", with_gflags = 1, **kwargs):
     if native.repository_name() != "@":
         repo_name = native.repository_name().lstrip("@")
         gendir = "$(GENDIR)/external/" + repo_name
         src_windows = "external/%s/src/windows" % repo_name
     else:
         gendir = "$(GENDIR)"
         src_windows = "src/windows"

     # Config setting for WebAssembly target.
     native.config_setting(
         name = "wasm",
         values = {"cpu": "wasm"},
     )

     # Detect when building with clang-cl on Windows.
     native.config_setting(
         name = "clang-cl",
         values = {"compiler": "clang-cl"},
     )

     common_copts = [
         "-DGLOG_BAZEL_BUILD",
         # Inject a C++ namespace.
         "-DGOOGLE_NAMESPACE='%s'" % namespace,
         "-DHAVE_CXX11_NULLPTR_T",
         "-DHAVE_STDINT_H",
         "-DHAVE_STRING_H",
         "-DGLOG_CUSTOM_PREFIX_SUPPORT",
         "-I%s/glog_internal" % gendir,
     ] + (["-DHAVE_LIB_GFLAGS"] if with_gflags else [])

     wasm_copts = [
         # Disable warnings that exists in glog.
         "-Wno-sign-compare",
         "-Wno-unused-function",
         "-Wno-unused-local-typedefs",
         "-Wno-unused-variable",
         # Allows src/base/mutex.h to include pthread.h.
         "-DHAVE_PTHREAD",
         # Allows src/logging.cc to determine the host name.
         "-DHAVE_SYS_UTSNAME_H",
         # For src/utilities.cc.
         "-DHAVE_SYS_TIME_H",
         "-DHAVE_UNWIND_H",
         # Enable dumping stacktrace upon sigaction.
         "-DHAVE_SIGACTION",
         # For logging.cc.
         "-DHAVE_PREAD",
         "-DHAVE___ATTRIBUTE__",
     ]

     linux_or_darwin_copts = wasm_copts + [
         "-DGLOG_EXPORT=__attribute__((visibility(\\\"default\\\")))",
         # For src/utilities.cc.
         "-DHAVE_SYS_SYSCALL_H",
         # For src/logging.cc to create symlinks.
         "-DHAVE_UNISTD_H",
         "-fvisibility-inlines-hidden",
         "-fvisibility=hidden",
     ]

     freebsd_only_copts = [
         # Enable declaration of _Unwind_Backtrace
         "-D_GNU_SOURCE",
     ]

     darwin_only_copts = [
         # For stacktrace.
         "-DHAVE_DLADDR",
         # Avoid deprecated syscall().
         "-DHAVE_PTHREAD_THREADID_NP",
     ]

     windows_only_copts = [
         # Override -DGLOG_EXPORT= from the cc_library's defines.
         "-DGLOG_EXPORT=__declspec(dllexport)",
         "-DGLOG_NO_ABBREVIATED_SEVERITIES",
         "-DHAVE_SNPRINTF",
         "-I" + src_windows,
     ]

     clang_cl_only_copts = [
         # Allow the override of -DGLOG_EXPORT.
         "-Wno-macro-redefined",
     ]

     windows_only_srcs = [
         "src/glog/log_severity.h",
         "src/windows/dirent.h",
         "src/windows/port.cc",
         "src/windows/port.h",
     ]

     gflags_deps = ["@com_github_gflags_gflags//:gflags"] if with_gflags else []

     native.cc_library(
         name = "glog",
         visibility = ["//visibility:public"],
         srcs = [
             ":config_h",
             "src/base/commandlineflags.h",
             "src/base/googleinit.h",
             "src/base/mutex.h",
             "src/demangle.cc",
             "src/demangle.h",
             "src/logging.cc",
             "src/raw_logging.cc",
             "src/signalhandler.cc",
             "src/stacktrace.h",
             "src/stacktrace_generic-inl.h",
             "src/stacktrace_libunwind-inl.h",
             "src/stacktrace_powerpc-inl.h",
             "src/stacktrace_unwind-inl.h",
             "src/stacktrace_windows-inl.h",
             "src/stacktrace_x86-inl.h",
             "src/symbolize.cc",
             "src/symbolize.h",
             "src/utilities.cc",
             "src/utilities.h",
             "src/vlog_is_on.cc",
         ] + select({
             "@bazel_tools//src/conditions:windows": windows_only_srcs,
             "//conditions:default": [],
         }),
         hdrs = [
             "src/glog/log_severity.h",
             "src/glog/platform.h",
             ":logging_h",
             ":raw_logging_h",
             ":stl_logging_h",
             ":vlog_is_on_h",
         ],
         strip_include_prefix = "src",
         defines = select({
             # GLOG_EXPORT is normally set by export.h, but that's not
             # generated for Bazel.
             "@bazel_tools//src/conditions:windows": [
                 "GLOG_EXPORT=",
                 "GLOG_DEPRECATED=__declspec(deprecated)",
                 "GLOG_NO_ABBREVIATED_SEVERITIES",
             ],
             "//conditions:default": [
                 "GLOG_DEPRECATED=__attribute__((deprecated))",
                 "GLOG_EXPORT=__attribute__((visibility(\\\"default\\\")))",
             ],
         }),
         copts =
             select({
                 "@bazel_tools//src/conditions:windows": common_copts + windows_only_copts,
                 "@bazel_tools//src/conditions:darwin": common_copts + linux_or_darwin_copts + darwin_only_copts,
                 "@bazel_tools//src/conditions:freebsd": common_copts + linux_or_darwin_copts + freebsd_only_copts,
                 ":wasm": common_copts + wasm_copts,
                 "//conditions:default": common_copts + linux_or_darwin_copts,
             }) +
             select({
                 ":clang-cl": clang_cl_only_copts,
                 "//conditions:default": []
             }),
         deps = gflags_deps + select({
             "@bazel_tools//src/conditions:windows": [":strip_include_prefix_hack"],
             "//conditions:default": [],
         }),
         **kwargs
     )

     # Workaround https://github.com/bazelbuild/bazel/issues/6337 by declaring
     # the dependencies without strip_include_prefix.
     native.cc_library(
         name = "strip_include_prefix_hack",
         hdrs = [
             "src/glog/log_severity.h",
             ":logging_h",
             ":raw_logging_h",
             ":stl_logging_h",
             ":vlog_is_on_h",
         ],
     )

     expand_template(
         name = "config_h",
         template = "src/config.h.cmake.in",
         out = "glog_internal/config.h",
         substitutions = {"#cmakedefine": "//cmakedefine"},
     )

     common_config = {
         "@ac_cv_cxx11_atomic@": "1",
         "@ac_cv_cxx11_constexpr@": "1",
         "@ac_cv_cxx11_chrono@": "1",
         "@ac_cv_cxx11_nullptr_t@": "1",
         "@ac_cv_cxx_using_operator@": "1",
         "@ac_cv_have_inttypes_h@": "0",
         "@ac_cv_have_u_int16_t@": "0",
         "@ac_cv_have_glog_export@": "0",
         "@ac_google_start_namespace@": "namespace google {",
         "@ac_google_end_namespace@": "}",
         "@ac_google_namespace@": "google",
     }

     posix_config = dict_union(common_config, {
         "@ac_cv_have_unistd_h@": "1",
         "@ac_cv_have_stdint_h@": "1",
         "@ac_cv_have_systypes_h@": "1",
         "@ac_cv_have_uint16_t@": "1",
         "@ac_cv_have___uint16@": "0",
         "@ac_cv_have___builtin_expect@": "1",
         "@ac_cv_have_libgflags@": "1" if with_gflags else "0",
         "@ac_cv___attribute___noinline@": "__attribute__((noinline))",
         "@ac_cv___attribute___noreturn@": "__attribute__((noreturn))",
         "@ac_cv___attribute___printf_4_5@": "__attribute__((__format__(__printf__, 4, 5)))",
     })

     windows_config = dict_union(common_config, {
         "@ac_cv_have_unistd_h@": "0",
         "@ac_cv_have_stdint_h@": "0",
         "@ac_cv_have_systypes_h@": "0",
         "@ac_cv_have_uint16_t@": "0",
         "@ac_cv_have___uint16@": "1",
         "@ac_cv_have___builtin_expect@": "0",
         "@ac_cv_have_libgflags@": "0",
         "@ac_cv___attribute___noinline@": "",
         "@ac_cv___attribute___noreturn@": "__declspec(noreturn)",
         "@ac_cv___attribute___printf_4_5@": "",
     })

     [
         expand_template(
             name = "%s_h" % f,
             template = "src/glog/%s.h.in" % f,
             out = "src/glog/%s.h" % f,
             substitutions = select({
                 "@bazel_tools//src/conditions:windows": windows_config,
                 "//conditions:default": posix_config,
             }),
         )
         for f in [
             "vlog_is_on",
             "stl_logging",
             "raw_logging",
             "logging",
         ]
     ]
	# Implement a macro glog_library() that the BUILD.bazel file can load.

	# By default, glog is built with gflags support. You can change this behavior
	# by using glog_library(with_gflags=0)
	#
	# This file is inspired by the following sample BUILD files:
	# https://github.com/google/glog/issues/61
	# https://github.com/google/glog/files/393474/BUILD.txt
	#
	# Known issue: the namespace parameter is not supported on Win32.

	def expand_template_impl(ctx):
	ctx.actions.expand_template(
	template = ctx.file.template,
	output = ctx.outputs.out,
	substitutions = ctx.attr.substitutions,
	)

	expand_template = rule(
	implementation = expand_template_impl,
	attrs = {
	"template": attr.label(mandatory = True, allow_single_file = True),
	"substitutions": attr.string_dict(mandatory = True),
	"out": attr.output(mandatory = True),
	},
	)

	def dict_union(x, y):
	z = {}
	z.update(x)
	z.update(y)
	return z

	def glog_library(namespace = "google", with_gflags = 1, **kwargs):
	if native.repository_name() != "@":
	repo_name = native.repository_name().lstrip("@")
	gendir = "$(GENDIR)/external/" + repo_name
	src_windows = "external/%s/src/windows" % repo_name
	else:
	gendir = "$(GENDIR)"
	src_windows = "src/windows"

	# Config setting for WebAssembly target.
	native.config_setting(
	name = "wasm",
	values = {"cpu": "wasm"},
	)

	# Detect when building with clang-cl on Windows.
	native.config_setting(
	name = "clang-cl",
	values = {"compiler": "clang-cl"},
	)

	common_copts = [
	"-DGLOG_BAZEL_BUILD",
	# Inject a C++ namespace.
	"-DGOOGLE_NAMESPACE='%s'" % namespace,
	"-DHAVE_CXX11_NULLPTR_T",
	"-DHAVE_STDINT_H",
	"-DHAVE_STRING_H",
	"-DGLOG_CUSTOM_PREFIX_SUPPORT",
	"-I%s/glog_internal" % gendir,
	] + (["-DHAVE_LIB_GFLAGS"] if with_gflags else [])

	wasm_copts = [
	# Disable warnings that exists in glog.
	"-Wno-sign-compare",
	"-Wno-unused-function",
	"-Wno-unused-local-typedefs",
	"-Wno-unused-variable",
	# Allows src/base/mutex.h to include pthread.h.
	"-DHAVE_PTHREAD",
	# Allows src/logging.cc to determine the host name.
	"-DHAVE_SYS_UTSNAME_H",
	# For src/utilities.cc.
	"-DHAVE_SYS_TIME_H",
	"-DHAVE_UNWIND_H",
	# Enable dumping stacktrace upon sigaction.
	"-DHAVE_SIGACTION",
	# For logging.cc.
	"-DHAVE_PREAD",
	"-DHAVE___ATTRIBUTE__",
	]

	linux_or_darwin_copts = wasm_copts + [
	"-DGLOG_EXPORT=__attribute__((visibility(\\\"default\\\")))",
	# For src/utilities.cc.
	"-DHAVE_SYS_SYSCALL_H",
	# For src/logging.cc to create symlinks.
	"-DHAVE_UNISTD_H",
	"-fvisibility-inlines-hidden",
	"-fvisibility=hidden",
	]

	freebsd_only_copts = [
	# Enable declaration of _Unwind_Backtrace
	"-D_GNU_SOURCE",
	]

	darwin_only_copts = [
	# For stacktrace.
	"-DHAVE_DLADDR",
	# Avoid deprecated syscall().
	"-DHAVE_PTHREAD_THREADID_NP",
	]

	windows_only_copts = [
	# Override -DGLOG_EXPORT= from the cc_library's defines.
	"-DGLOG_EXPORT=__declspec(dllexport)",
	"-DGLOG_NO_ABBREVIATED_SEVERITIES",
	"-DHAVE_SNPRINTF",
	"-I" + src_windows,
	]

	clang_cl_only_copts = [
	# Allow the override of -DGLOG_EXPORT.
	"-Wno-macro-redefined",
	]

	windows_only_srcs = [
	"src/glog/log_severity.h",
	"src/windows/dirent.h",
	"src/windows/port.cc",
	"src/windows/port.h",
	]

	gflags_deps = ["@com_github_gflags_gflags//:gflags"] if with_gflags else []

	native.cc_library(
	name = "glog",
	visibility = ["//visibility:public"],
	srcs = [
	":config_h",
	"src/base/commandlineflags.h",
	"src/base/googleinit.h",
	"src/base/mutex.h",
	"src/demangle.cc",
	"src/demangle.h",
	"src/logging.cc",
	"src/raw_logging.cc",
	"src/signalhandler.cc",
	"src/stacktrace.h",
	"src/stacktrace_generic-inl.h",
	"src/stacktrace_libunwind-inl.h",
	"src/stacktrace_powerpc-inl.h",
	"src/stacktrace_unwind-inl.h",
	"src/stacktrace_windows-inl.h",
	"src/stacktrace_x86-inl.h",
	"src/symbolize.cc",
	"src/symbolize.h",
	"src/utilities.cc",
	"src/utilities.h",
	"src/vlog_is_on.cc",
	] + select({
	"@bazel_tools//src/conditions:windows": windows_only_srcs,
	"//conditions:default": [],
	}),
	hdrs = [
	"src/glog/log_severity.h",
	"src/glog/platform.h",
	":logging_h",
	":raw_logging_h",
	":stl_logging_h",
	":vlog_is_on_h",
	],
	strip_include_prefix = "src",
	defines = select({
	# GLOG_EXPORT is normally set by export.h, but that's not
	# generated for Bazel.
	"@bazel_tools//src/conditions:windows": [
	"GLOG_EXPORT=",
	"GLOG_DEPRECATED=__declspec(deprecated)",
	"GLOG_NO_ABBREVIATED_SEVERITIES",
	],
	"//conditions:default": [
	"GLOG_DEPRECATED=__attribute__((deprecated))",
	"GLOG_EXPORT=__attribute__((visibility(\\\"default\\\")))",
	],
	}),
	copts =
	select({
	"@bazel_tools//src/conditions:windows": common_copts + windows_only_copts,
	"@bazel_tools//src/conditions:darwin": common_copts + linux_or_darwin_copts + darwin_only_copts,
	"@bazel_tools//src/conditions:freebsd": common_copts + linux_or_darwin_copts + freebsd_only_copts,
	":wasm": common_copts + wasm_copts,
	"//conditions:default": common_copts + linux_or_darwin_copts,
	}) +
	select({
	":clang-cl": clang_cl_only_copts,
	"//conditions:default": []
	}),
	deps = gflags_deps + select({
	"@bazel_tools//src/conditions:windows": [":strip_include_prefix_hack"],
	"//conditions:default": [],
	}),
	**kwargs
	)

	# Workaround https://github.com/bazelbuild/bazel/issues/6337 by declaring
	# the dependencies without strip_include_prefix.
	native.cc_library(
	name = "strip_include_prefix_hack",
	hdrs = [
	"src/glog/log_severity.h",
	":logging_h",
	":raw_logging_h",
	":stl_logging_h",
	":vlog_is_on_h",
	],
	)

	expand_template(
	name = "config_h",
	template = "src/config.h.cmake.in",
	out = "glog_internal/config.h",
	substitutions = {"#cmakedefine": "//cmakedefine"},
	)

	common_config = {
	"@ac_cv_cxx11_atomic@": "1",
	"@ac_cv_cxx11_constexpr@": "1",
	"@ac_cv_cxx11_chrono@": "1",
	"@ac_cv_cxx11_nullptr_t@": "1",
	"@ac_cv_cxx_using_operator@": "1",
	"@ac_cv_have_inttypes_h@": "0",
	"@ac_cv_have_u_int16_t@": "0",
	"@ac_cv_have_glog_export@": "0",
	"@ac_google_start_namespace@": "namespace google {",
	"@ac_google_end_namespace@": "}",
	"@ac_google_namespace@": "google",
	}

	posix_config = dict_union(common_config, {
	"@ac_cv_have_unistd_h@": "1",
	"@ac_cv_have_stdint_h@": "1",
	"@ac_cv_have_systypes_h@": "1",
	"@ac_cv_have_uint16_t@": "1",
	"@ac_cv_have___uint16@": "0",
	"@ac_cv_have___builtin_expect@": "1",
	"@ac_cv_have_libgflags@": "1" if with_gflags else "0",
	"@ac_cv___attribute___noinline@": "__attribute__((noinline))",
	"@ac_cv___attribute___noreturn@": "__attribute__((noreturn))",
	"@ac_cv___attribute___printf_4_5@": "__attribute__((__format__(__printf__, 4, 5)))",
	})

	windows_config = dict_union(common_config, {
	"@ac_cv_have_unistd_h@": "0",
	"@ac_cv_have_stdint_h@": "0",
	"@ac_cv_have_systypes_h@": "0",
	"@ac_cv_have_uint16_t@": "0",
	"@ac_cv_have___uint16@": "1",
	"@ac_cv_have___builtin_expect@": "0",
	"@ac_cv_have_libgflags@": "0",
	"@ac_cv___attribute___noinline@": "",
	"@ac_cv___attribute___noreturn@": "__declspec(noreturn)",
	"@ac_cv___attribute___printf_4_5@": "",
	})

	[
	expand_template(
	name = "%s_h" % f,
	template = "src/glog/%s.h.in" % f,
	out = "src/glog/%s.h" % f,
	substitutions = select({
	"@bazel_tools//src/conditions:windows": windows_config,
	"//conditions:default": posix_config,
	}),
	)
	for f in [
	"vlog_is_on",
	"stl_logging",
	"raw_logging",
	"logging",
	]
	]