bazel/gflags.bzl

   1 # ------------------------------------------------------------------------------
   2 # Add native rules to configure source files
   3 def gflags_sources(namespace=["google", "gflags"]):
   4     native.genrule(
   5         name = "config_h",
   6         srcs = ["src/config.h.in"],
   7         outs = ["config.h"],
   8         cmd  = "awk '{ gsub(/^#cmakedefine/, \"//cmakedefine\"); print; }' $(<) > $(@)"
   9     )
  10     native.genrule(
  11         name = "gflags_declare_h",
  12         srcs = ["src/gflags_declare.h.in"],
  13         outs = ["gflags/gflags_declare.h"],
  14         cmd  = ("awk '{ " +
  15                 "gsub(/@GFLAGS_NAMESPACE@/, \"" + namespace[0] + "\"); " +
  16                 "gsub(/@(HAVE_STDINT_H|HAVE_SYS_TYPES_H|HAVE_INTTYPES_H|GFLAGS_INTTYPES_FORMAT_C99)@/, \"1\"); " +
  17                 "gsub(/@([A-Z0-9_]+)@/, \"0\"); " +
  18                 "print; }' $(<) > $(@)")
  19     )
  20     gflags_ns_h_files = []
  21     for ns in namespace[1:]:
  22         gflags_ns_h_file = "gflags_{}.h".format(ns)
  23         native.genrule(
  24             name = gflags_ns_h_file.replace('.', '_'),
  25             srcs = ["src/gflags_ns.h.in"],
  26             outs = ["gflags/" + gflags_ns_h_file],
  27             cmd  = ("awk '{ " +
  28                     "gsub(/@ns@/, \"" + ns + "\"); " +
  29                     "gsub(/@NS@/, \"" + ns.upper() + "\"); " +
  30                     "print; }' $(<) > $(@)")
  31         )
  32         gflags_ns_h_files.append(gflags_ns_h_file)
  33     native.genrule(
  34         name = "gflags_h",
  35         srcs = ["src/gflags.h.in"],
  36         outs = ["gflags/gflags.h"],
  37         cmd  = ("awk '{ " +
  38                 "gsub(/@GFLAGS_ATTRIBUTE_UNUSED@/, \"\"); " +
  39                 "gsub(/@INCLUDE_GFLAGS_NS_H@/, \"" + '\n'.join(["#include \\\"gflags/{}\\\"".format(hdr) for hdr in gflags_ns_h_files]) + "\"); " +
  40                 "print; }' $(<) > $(@)")
  41     )
  42     native.genrule(
  43         name = "gflags_completions_h",
  44         srcs = ["src/gflags_completions.h.in"],
  45         outs = ["gflags/gflags_completions.h"],
  46         cmd  = "awk '{ gsub(/@GFLAGS_NAMESPACE@/, \"" + namespace[0] + "\"); print; }' $(<) > $(@)"
  47     )
  48     hdrs = [":gflags_h", ":gflags_declare_h", ":gflags_completions_h"]
  49     hdrs.extend([':' + hdr.replace('.', '_') for hdr in gflags_ns_h_files])
  50     srcs = [
  51         ":config_h",
  52         "src/gflags.cc",
  53         "src/gflags_completions.cc",
  54         "src/gflags_reporting.cc",
  55         "src/mutex.h",
  56         "src/util.h"
  57     ]
  58     return [hdrs, srcs]
  59
  60 # ------------------------------------------------------------------------------
  61 # Add native rule to build gflags library
  62 def gflags_library(hdrs=[], srcs=[], threads=1):
  63     name = "gflags"
  64     copts = [
  65         "-DHAVE_STDINT_H",
  66         "-DHAVE_SYS_TYPES_H",
  67         "-DHAVE_INTTYPES_H",
  68         "-DHAVE_SYS_STAT_H",
  69         "-DHAVE_UNISTD_H",
  70         "-DHAVE_FNMATCH_H",
  71         "-DHAVE_STRTOLL",
  72         "-DHAVE_STRTOQ",
  73         "-DHAVE_PTHREAD",
  74         "-DHAVE_RWLOCK",
  75         "-DGFLAGS_INTTYPES_FORMAT_C99",
  76         "-DGFLAGS_IS_A_DLL=0",
  77     ]
  78     linkopts = []
  79     if threads:
  80         linkopts.append("-lpthread")
  81     else:
  82         name += "_nothreads"
  83         copts.append("-DNO_THREADS")
  84     native.cc_library(
  85         name       = name,
  86         hdrs       = hdrs,
  87         srcs       = srcs,
  88         includes   = ["$(GENDIR)"],
  89         copts      = copts,
  90         linkopts   = linkopts,
  91         visibility = ["//visibility:public"]
  92     )