220 lines
6.7 KiB
Python
220 lines
6.7 KiB
Python
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# Implement a macro glog_library() that the BUILD file can load.
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# By default, glog is built with gflags support. You can change this behavior
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# by using glog_library(with_gflags=0)
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#
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# This file is inspired by the following sample BUILD files:
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# https://github.com/google/glog/issues/61
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# https://github.com/google/glog/files/393474/BUILD.txt
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#
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# Known issue: the namespace parameter is not supported on Win32.
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def glog_library(namespace = "google", with_gflags = 1, **kwargs):
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if native.repository_name() != "@":
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repo_name = native.repository_name().lstrip("@")
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gendir = "$(GENDIR)/external/" + repo_name
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src_windows = "external/%s/src/windows" % repo_name
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else:
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gendir = "$(GENDIR)"
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src_windows = "src/windows"
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# Config setting for WebAssembly target.
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native.config_setting(
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name = "wasm",
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values = {"cpu": "wasm"},
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)
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common_copts = [
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"-DGLOG_BAZEL_BUILD",
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"-DHAVE_STDINT_H",
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"-DHAVE_STRING_H",
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"-DHAVE_UNWIND_H",
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] + (["-DHAVE_LIB_GFLAGS"] if with_gflags else [])
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wasm_copts = [
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# Disable warnings that exists in glog.
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"-Wno-sign-compare",
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"-Wno-unused-function",
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"-Wno-unused-local-typedefs",
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"-Wno-unused-variable",
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# Inject a C++ namespace.
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"-DGOOGLE_NAMESPACE='%s'" % namespace,
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# Allows src/base/mutex.h to include pthread.h.
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"-DHAVE_PTHREAD",
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# Allows src/logging.cc to determine the host name.
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"-DHAVE_SYS_UTSNAME_H",
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# For src/utilities.cc.
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"-DHAVE_SYS_TIME_H",
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# Enable dumping stacktrace upon sigaction.
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"-DHAVE_SIGACTION",
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# For logging.cc.
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"-DHAVE_PREAD",
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"-DHAVE___ATTRIBUTE__",
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"-I%s/glog_internal" % gendir,
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]
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linux_or_darwin_copts = wasm_copts + [
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# For src/utilities.cc.
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"-DHAVE_SYS_SYSCALL_H",
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]
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freebsd_only_copts = [
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# Enable declaration of _Unwind_Backtrace
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"-D_GNU_SOURCE",
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]
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darwin_only_copts = [
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# For stacktrace.
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"-DHAVE_DLADDR",
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]
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windows_only_copts = [
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"-DHAVE_SNPRINTF",
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"-I" + src_windows,
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]
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windows_only_srcs = [
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"src/glog/log_severity.h",
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"src/windows/config.h",
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"src/windows/port.cc",
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"src/windows/port.h",
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]
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gflags_deps = ["@com_github_gflags_gflags//:gflags"] if with_gflags else []
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native.cc_library(
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name = "glog",
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visibility = ["//visibility:public"],
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srcs = [
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"src/base/commandlineflags.h",
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"src/base/googleinit.h",
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"src/base/mutex.h",
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"src/demangle.cc",
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"src/demangle.h",
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"src/logging.cc",
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"src/raw_logging.cc",
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"src/signalhandler.cc",
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"src/stacktrace.h",
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"src/stacktrace_generic-inl.h",
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"src/stacktrace_libunwind-inl.h",
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"src/stacktrace_powerpc-inl.h",
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"src/stacktrace_windows-inl.h",
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"src/stacktrace_x86-inl.h",
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"src/stacktrace_x86_64-inl.h",
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"src/symbolize.cc",
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"src/symbolize.h",
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"src/utilities.cc",
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"src/utilities.h",
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"src/vlog_is_on.cc",
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] + select({
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"@bazel_tools//src/conditions:windows": windows_only_srcs,
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"//conditions:default": [":config_h"],
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}),
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copts =
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select({
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"@bazel_tools//src/conditions:windows": common_copts + windows_only_copts,
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"@bazel_tools//src/conditions:darwin": common_copts + linux_or_darwin_copts + darwin_only_copts,
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"@bazel_tools//src/conditions:freebsd": common_copts + linux_or_darwin_copts + freebsd_only_copts,
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":wasm": common_copts + wasm_copts,
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"//conditions:default": common_copts + linux_or_darwin_copts,
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}),
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deps = [
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":glog_headers",
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] + gflags_deps,
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**kwargs
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)
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# glog headers vary depending on the os.
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native.cc_library(
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name = "glog_headers",
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deps = select({
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"@bazel_tools//src/conditions:windows": [":windows_glog_headers"],
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"//conditions:default": [":default_glog_headers"],
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}),
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)
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native.cc_library(
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name = "windows_glog_headers",
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hdrs = native.glob(["src/windows/glog/*.h"]),
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strip_include_prefix = "src/windows",
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# We need to override the default GOOGLE_GLOG_DLL_DECL from
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# src/windows/glog/*.h to match src/windows/config.h.
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defines = ["GOOGLE_GLOG_DLL_DECL=__declspec(dllexport)"],
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deps = [":strip_include_prefix_hack"],
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)
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# Workaround https://github.com/bazelbuild/bazel/issues/6337 by declaring
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# the dependencies without strip_include_prefix.
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native.cc_library(
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name = "strip_include_prefix_hack",
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hdrs = native.glob(["src/windows/*.h"]),
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)
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native.cc_library(
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name = "default_glog_headers",
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strip_include_prefix = "src",
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hdrs = [
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"src/glog/log_severity.h",
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":logging_h",
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":raw_logging_h",
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":stl_logging_h",
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":vlog_is_on_h",
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],
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)
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native.genrule(
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name = "config_h",
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srcs = [
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"src/config.h.cmake.in",
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],
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outs = [
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"glog_internal/config.h",
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],
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cmd = "awk '{ gsub(/^#cmakedefine/, \"//cmakedefine\"); print; }' $< > $@",
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)
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native.genrule(
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name = "gen_sh",
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outs = [
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"gen.sh",
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],
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cmd = r'''\
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#!/bin/sh
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cat > $@ <<"EOF"
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sed -e 's/@ac_cv_cxx_using_operator@/1/g' \
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-e 's/@ac_cv_have_unistd_h@/1/g' \
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-e 's/@ac_cv_have_stdint_h@/1/g' \
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-e 's/@ac_cv_have_systypes_h@/1/g' \
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-e 's/@ac_cv_have_libgflags@/{}/g' \
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-e 's/@ac_cv_have_uint16_t@/1/g' \
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-e 's/@ac_cv_have___builtin_expect@/1/g' \
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-e 's/@ac_cv_have_.*@/0/g' \
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-e 's/@ac_google_start_namespace@/namespace google {{/g' \
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-e 's/@ac_google_end_namespace@/}}/g' \
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-e 's/@ac_google_namespace@/google/g' \
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-e 's/@ac_cv___attribute___noinline@/__attribute__((noinline))/g' \
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-e 's/@ac_cv___attribute___noreturn@/__attribute__((noreturn))/g' \
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-e 's/@ac_cv___attribute___printf_4_5@/__attribute__((__format__ (__printf__, 4, 5)))/g'
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EOF
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'''.format(int(with_gflags)),
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)
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[
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native.genrule(
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name = "%s_h" % f,
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srcs = [
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"src/glog/%s.h.in" % f,
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],
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outs = [
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"src/glog/%s.h" % f,
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],
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cmd = "$(location :gen_sh) < $< > $@",
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tools = [":gen_sh"],
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)
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for f in [
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"vlog_is_on",
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"stl_logging",
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"raw_logging",
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"logging",
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]
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]
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