# file      : libicu/buildfile
# license   : Unicode License; see accompanying LICENSE file

./: lib{icuuc} lib{icudata}

patched = ucasemap unistr

lib{icuuc}: uc/hxx{**} uc/cxx{* -{$patched}} cxx{$patched} lib{icudata}

lib{icudata}: data/{h c}{*} uc/unicode/h{*}

# Our C-files in data/{le,be}/ are included into C-files in ./data/, so treat
# them as files to exclude from the compilation.
#
lib{icudata}: data/le/file{*} data/be/file{*}

tclass = $cc.target.class
tsys   = $cc.target.system

windows = ($tclass == 'windows')

# Build options.
#
cc.poptions  += -DU_ATTRIBUTE_DEPRECATED=
cxx.poptions += -DU_COMMON_IMPLEMENTATION

if! $windows
  cc.poptions += -DU_HAVE_STRTOD_L=1
else
  cc.poptions += -DU_HAVE_STRTOD_L=0 -DHAVE_DLOPEN=0 -DU_HAVE_MMAP=0 -DWIN32

switch $tclass, $tsys
{
  case 'linux'
    cc.poptions += -D_REENTRANT -DU_HAVE_ELF_H -DU_HAVE_XLOCALE_H=0

  case 'bsd'
    cc.poptions += -D_REENTRANT -DU_HAVE_ELF_H -DU_HAVE_XLOCALE_H=1 \
                   -DU_HAVE_TIMEZONE=0 -DU_HAVE_STRING_VIEW=1

  case 'macos'
  {
    cc.poptions += -DU_HAVE_XLOCALE_H=1 -DU_HAVE_STRING_VIEW=1

    # Note that upstream requests the POSIX 2004 compliance (see
    # uc/uposixdefs.h for details). This results with compilation errors for
    # some source files when build on MacOS with gcc (as of 9.2; GCC issues
    # 93151 and 93469 are reported). We workaround the issue disabling this
    # POSIX compliance request for the faulty source files (luckily the
    # request is redundant for them).
    #
    if ($cxx.id == 'gcc')
      uc/obj{putil umapfile}: cxx.poptions += -D_XOPEN_SOURCE=400
  }

  case 'windows', 'mingw32'
    cc.poptions += -DWINVER=0x0601 -D_WIN32_WINNT=0x0601 \
                   -D_MT # Used instead of -mthreads.

  case 'windows'
    cc.poptions += -DU_HAVE_DIRENT_H=0 -DU_HAVE_POPEN=0 -DU_HAVE_TZNAME=0
}

cc.poptions =+ "-I$src_root" "-I$src_base/uc"

obja{*}: cc.poptions += -DU_STATIC_IMPLEMENTATION

switch $c.class, $tsys
{
  case 'gcc'
  {
    cc.coptions  += -fvisibility=hidden

    # Disable warnings that pop up with -Wall -Wextra. Upstream doesn't seem
    # to care about these and it is not easy to disable specific warnings in a
    # way that works across compilers/version (some -Wno-* options are only
    # recognized in newer versions).
    #
    cc.coptions += -Wno-all -Wno-extra

    # Disable the Clang targeting MSVC warnings.
    #
    if ($c.id == 'clang' && $tsys == 'win32-msvc')
      cc.coptions += -Wno-ignored-pragma-optimize -Wno-ignored-attributes
  }
  case 'msvc'
  {
    cc.coptions  += /utf-8 /GF /Gy
    cxx.coptions += /Zc:wchar_t

    # Disable warnings that pop up with /W3.
    #
    c.coptions   += /wd4229
    cxx.coptions += /wd4244 /wd4996
  }
}

# If install.root is specified, then define the DEFAULT_ICU_PLUGINS macro when
# compiling uc/icuplug.cpp and leave it undefined otherwise.
#
if ($install.root != [null])
{
  plugins_dir = $install.resolve($install.lib)/icu

  # Escape backslashes and quotes in the directory path prior to representing
  # it as C++ string literal.
  #
  pd = $regex.replace($plugins_dir, '(\\|")', '\\\1')

  uc/obj{icuplug}: cxx.poptions += -DDEFAULT_ICU_PLUGINS="\"$pd\""
}

switch $tclass, $tsys
{
  case 'linux'
  {
    cc.loptions += -Wl,-Bsymbolic     \
                   -Wl,--no-undefined # Make sure all symbols are resolvable.

    cxx.libs += -lpthread -ldl -lm
  }
  case 'bsd'
  {
    cc.loptions += -Wl,-Bsymbolic
    cxx.libs    += -lpthread -lm
  }
  case 'macos'
  {
    cxx.libs += -lpthread -lm
  }
  case 'windows', 'mingw32'
  {
    # Note that upstream also passes -mthreads (thread-safe exception
    # handling) that we omit as ICU never throws exceptions (see ICU FAQs for
    # details). We also omit -lpthread -lm that seems to be redundant.
    #
    cc.loptions += -Wl,-Bsymbolic -Wl,--enable-auto-import \
                   -Wl,--no-undefined # Make sure all symbols are resolvable.
  }
  case 'windows'
  {
    cxx.libs += advapi32.lib
  }
}

# Export options.
#
# We don't export libicudata since it is not of much use to anyone except
# libicuuc.
#
lib{icuuc}:  cc.export.poptions  = "-I$src_base/uc"
liba{icuuc}: cc.export.poptions += -DU_STATIC_IMPLEMENTATION

# See bootstrap.build for details.
#
# Note that on Windows and POSIX the data library is named quite differently
# as icudt65.dll and libicudata.so.65.1, respectivelly. We name it
# consistently as icudata-65.dll and libicudata-65.so.
#
if $version.pre_release
  lib{icudata icuuc}: bin.lib.version = @"-$version.project_id"
else
  lib{icudata icuuc}: bin.lib.version = @"-$abi_version_major" \
                                        linux@"$abi_version"

# Install headers from the uc/unicode/ subdirectory only.
#
h{*}:              install = false
hxx{*}:            install = false
uc/unicode/hxx{*}: install = include/unicode/