import os
#
from gub import build
from gub import context
from gub import cross
from gub import loggedos
from gub import misc
from gub.specs import gcc

class Gcc (cross.AutoBuild):
    source = 'http://ftp.gnu.org/pub/gnu/gcc/gcc-4.7.2/gcc-4.7.2.tar.gz'
    patches = ['gcc-4.7.2-fix-libstdc++-debug-build.patch']
    dependencies = ['cross/binutils']
    configure_flags = (cross.AutoBuild.configure_flags
                + '%(enable_languages)s'
                + ' --enable-static'
                + ' --enable-shared'
                + ' --with-as=%(cross_prefix)s/bin/%(target_architecture)s-as'
                + ' --with-ld=%(cross_prefix)s/bin/%(target_architecture)s-ld'
                + ' --with-nm=%(cross_prefix)s/bin/%(target_architecture)s-nm'
                )
    make_flags = misc.join_lines ('''
tooldir='%(cross_prefix)s/%(target_architecture)s'
gcc_tooldir='%(prefix_dir)s/%(target_architecture)s'
''')
    def patch (self):
        cross.AutoBuild.patch (self)
        gcc.do_not_look_in_slash_usr (self)
    @context.subst_method
    def NM_FOR_TARGET (self):
         return '%(toolchain_prefix)snm'
        # FIXME: why no -devel package?
    subpackage_names = ['doc', 'c++-runtime', 'runtime', '']
    def get_subpackage_definitions (self):
        d = cross.AutoBuild.get_subpackage_definitions (self)
        prefix_dir = self.settings.prefix_dir
        d['c++-runtime'] = [prefix_dir + '/lib/libstdc++.so*']
        return d
    def languages (self):
        return ['c', 'c++', 'fortran']
    @context.subst_method
    def enable_languages (self):
        flags = ' --enable-languages=' + ','.join (self.languages ()) 
        if 'c++' in self.languages ():
            flags += ' --enable-libstdcxx-debug'
        return flags
    def pre_install (self):
        cross.AutoBuild.pre_install (self)
        # Only id <PREFIX>/<TARGET-ARCH>/bin exists, gcc's install installs
        # the plain gcc drivers without <TOOLCHAIN-PREFIX>gcc
#        self.system ('mkdir -p %(install_root)s%(cross_prefix)s/%(target_architecture)s/bin')
        self.system ('mkdir -p %(install_root)s%(prefix_dir)s/%(target_architecture)s/bin')
    def install (self):
        cross.AutoBuild.install (self)
        gcc.move_target_libs (self, '%(install_prefix)s%(cross_dir)s/%(target_architecture)s')
        gcc.move_target_libs (self, '%(install_prefix)s%(cross_dir)s/lib')
        self.disable_libtool_la_files ('stdc[+][+]')

class Gcc__from__source (Gcc):
    dependencies = (Gcc.dependencies
                    + ['cross/gcc-core', 'glibc-core'])
    #FIXME: merge all configure_command settings with Gcc
    configure_flags = (Gcc.configure_flags
                + misc.join_lines ('''
--with-local-prefix=%(system_prefix)s
--disable-multilib
--disable-nls
--enable-threads=posix
--enable-__cxa_atexit
--enable-symvers=gnu
--enable-c99 
--enable-clocale=gnu 
--enable-long-long
'''))
    def get_conflict_dict (self):
        return {'': ['cross/gcc-core'], 'doc': ['cross/gcc-core'], 'runtime': ['cross/gcc-core']}

Gcc__linux = Gcc__from__source

class Gcc__mingw (Gcc):
    dependencies = (Gcc.dependencies
                + ['mingw-runtime', 'w32api']
                + ['tools::libtool'])
    def patch (self):
        Gcc.patch (self)
        for f in ['%(srcdir)s/gcc/config/i386/mingw32.h',
                  '%(srcdir)s/gcc/config/i386/t-mingw-w32']:
            self.file_sub ([('/mingw/include','%(prefix_dir)s/include'),
                            ('/mingw/lib','%(prefix_dir)s/lib'),
                            ], f)
    def STATIC_GXX_WIP_REMOVE_THIS_PREFIX_configure (self):
        # leave this for now.
        # lots of undefined refs.
        # possibly try static libstc++ with gcc > 4.1.1
        '''.libs/bitmap_allocator.o: In function `__gthread_mutex_init_function':
/home/janneke/vc/gub/target/mingw/build/cross/gcc-4.1.1/i686-mingw32/libstdc++-v3/include/i686-mingw32/bits/gthr-default.h:463: undefined reference to `___gthr_win32_mutex_init_function'
.libs/bitmap_allocator.o: In function `_ZN9__gnu_cxx9free_list6_M_getEj':
/home/janneke/vc/gub/target/mingw/src/cross/gcc-4.1.1/libstdc++-v3/src/bitmap_allocator.cc:53: undefined reference to `__Unwind_SjLj_Register'

'''
        Gcc.configure (self)
        # Configure all subpackages, makes
        # w32.libtool_fix_allow_undefined to find all libtool files
        self.system ('cd %(builddir)s && make %(compile_flags)s configure-host configure-target')
        # Must ONLY do target stuff, otherwise cross executables cannot find their libraries
        # self.map_locate (lambda logger,file: build.libtool_update (logger, self.expand ('%(tools_prefix)s/bin/libtool'), file), '%(builddir)s/', 'libtool')
        #self.map_locate (lambda logger, file: build.libtool_update (logger, self.expand ('%(tools_prefix)s/bin/libtool'), file), '%(builddir)s/i686-mingw32', 'libtool')
        vars = ['CC', 'CXX', 'LTCC', 'LD', 'sys_lib_search_path_spec', 'sys_lib_dlsearch_path_spec', 'predep_objects', 'postdep_objects', 'predeps', 'postdeps', 'old_striplib', 'striplib']
        self.map_locate (lambda logger, file: build.libtool_update_preserve_vars (logger, self.expand ('%(tools_prefix)s/bin/libtool'), vars, file), '%(builddir)s/i686-mingw32', 'libtool')
        self.map_locate (lambda logger, file: build.libtool_force_infer_tag (logger, 'CXX', file), '%(builddir)s/i686-mingw32', 'libtool')