bazel/glog.bzl

   1 # Implement a macro glog_library() that the BUILD file can load.
   2
   3 # By default, glog is built with gflags support.  You can change this behavior
   4 # by using glog_library(with_gflags=0)
   5 #
   6 # This file is inspired by the following sample BUILD files:
   7 #       https://github.com/google/glog/issues/61
   8 #       https://github.com/google/glog/files/393474/BUILD.txt
   9
  10 def glog_library(namespace='google', with_gflags=1):
  11     if native.repository_name() != '@':
  12         gendir = '$(GENDIR)/external/' + native.repository_name().lstrip('@')
  13     else:
  14         gendir = '$(GENDIR)'
  15
  16     native.cc_library(
  17         name = 'glog',
  18         visibility = [ '//visibility:public' ],
  19         srcs = [
  20             ':config_h',
  21             'src/base/commandlineflags.h',
  22             'src/base/googleinit.h',
  23             'src/base/mutex.h',
  24             'src/demangle.cc',
  25             'src/demangle.h',
  26             'src/logging.cc',
  27             'src/raw_logging.cc',
  28             'src/signalhandler.cc',
  29             'src/stacktrace.h',
  30             'src/stacktrace_generic-inl.h',
  31             'src/stacktrace_libunwind-inl.h',
  32             'src/stacktrace_powerpc-inl.h',
  33             'src/stacktrace_windows-inl.h',
  34             'src/stacktrace_x86-inl.h',
  35             'src/stacktrace_x86_64-inl.h',
  36             'src/symbolize.cc',
  37             'src/symbolize.h',
  38             'src/utilities.cc',
  39             'src/utilities.h',
  40             'src/vlog_is_on.cc',
  41         ],
  42         hdrs = [
  43             ':logging_h',
  44             ':raw_logging_h',
  45             ':stl_logging_h',
  46             ':vlog_is_on_h',
  47             'src/glog/log_severity.h',
  48         ],
  49         strip_include_prefix = 'src',
  50         copts = [
  51             # Disable warnings that exists in glog.
  52             '-Wno-sign-compare',
  53             '-Wno-unused-function',
  54             '-Wno-unused-local-typedefs',
  55             '-Wno-unused-variable',
  56             # Inject a C++ namespace.
  57             "-D_START_GOOGLE_NAMESPACE_='namespace %s {'" % namespace,
  58             "-D_END_GOOGLE_NAMESPACE_='}'",
  59             "-DGOOGLE_NAMESPACE='%s'" % namespace,
  60             # Allows src/base/mutex.h to include pthread.h.
  61             '-DHAVE_PTHREAD',
  62             # Allows src/logging.cc to determine the host name.
  63             '-DHAVE_SYS_UTSNAME_H',
  64             # For src/utilities.cc.
  65             '-DHAVE_SYS_SYSCALL_H',
  66             '-DHAVE_SYS_TIME_H',
  67             '-DHAVE_STDINT_H',
  68             '-DHAVE_STRING_H',
  69             # Enable dumping stacktrace upon sigaction.
  70             '-DHAVE_SIGACTION',
  71             # For logging.cc.
  72             '-DHAVE_PREAD',
  73
  74             # Include generated header files.
  75             '-I%s/glog_internal' % gendir,
  76         ] + [
  77             # Use gflags to parse CLI arguments.
  78             '-DHAVE_LIB_GFLAGS',
  79         ] if with_gflags else [],
  80         deps = [
  81             '@com_github_gflags_gflags//:gflags',
  82         ] if with_gflags else [],
  83     )
  84
  85     native.genrule(
  86         name = 'gen_sh',
  87         outs = [
  88             'gen.sh',
  89         ],
  90         cmd = r'''\
  91 #!/bin/sh
  92 cat > $@ <<"EOF"
  93 sed -e 's/@ac_cv_have_unistd_h@/1/g' \
  94     -e 's/@ac_cv_have_stdint_h@/1/g' \
  95     -e 's/@ac_cv_have_systypes_h@/1/g' \
  96     -e 's/@ac_cv_have_libgflags_h@/1/g' \
  97     -e 's/@ac_cv_have_uint16_t@/1/g' \
  98     -e 's/@ac_cv_have___builtin_expect@/1/g' \
  99     -e 's/@ac_cv_have_.*@/0/g' \
 100     -e 's/@ac_google_start_namespace@/namespace google {/g' \
 101     -e 's/@ac_google_end_namespace@/}/g' \
 102     -e 's/@ac_google_namespace@/google/g' \
 103     -e 's/@ac_cv___attribute___noinline@/__attribute__((noinline))/g' \
 104     -e 's/@ac_cv___attribute___noreturn@/__attribute__((noreturn))/g' \
 105     -e 's/@ac_cv___attribute___printf_4_5@/__attribute__((__format__ (__printf__, 4, 5)))/g'
 106 EOF
 107 ''',
 108     )
 109
 110     native.genrule(
 111         name = 'config_h',
 112         srcs = [
 113             'src/config.h.cmake.in',
 114         ],
 115         outs = [
 116             'glog_internal/config.h',
 117         ],
 118         cmd = "awk '{ gsub(/^#cmakedefine/, \"//cmakedefine\"); print; }' $< > $@",
 119     )
 120
 121     [native.genrule(
 122         name = '%s_h' % f,
 123         srcs = [
 124             'src/glog/%s.h.in' % f,
 125         ],
 126         outs = [
 127             'src/glog/%s.h' % f,
 128         ],
 129         cmd = '$(location :gen_sh) < $< > $@',
 130         tools = [':gen_sh'],
 131     ) for f in [
 132             'vlog_is_on',
 133             'stl_logging',
 134             'raw_logging',
 135             'logging',
 136         ]
 137     ]