# gcc configuration options

config CC_ENABLE_CXX_FLAGS

    string

    prompt "Flags to pass to --enable-cxx-flags"

    default ""

    help

      Enter here the value of the gcc's ./configure option --enable-cxx-flags.

      Leave empty if you don't know better.

      Note: just pass in the option _value_, that is only the part that goes

      after the '=' sign.

config CC_CORE_EXTRA_CONFIG_ARRAY

    string

    prompt "Core gcc extra config"

    default ""

    depends on CC_CORE_PASS_1_NEEDED || CC_CORE_PASS_2_NEEDED

    help

      Extra flags to pass onto ./configure when configuring the core gcc.

      The core gcc is a stripped down, C-only compiler needed to build

      the C library. Kinda bootstrap gcc, if you wish.

      You can enter multiple arguments here, and arguments can contain spaces

      if they are properly quoted (or escaped, but prefer quotes). Eg.:

          --with-foo="1st arg with 4 spaces" --with-bar=2nd-arg-without-space

config CC_EXTRA_CONFIG_ARRAY

    string

    prompt "gcc extra config"

    default ""

    help

      Extra flags to pass onto ./configure when configuring gcc.

      You can enter multiple arguments here, and arguments can contain spaces

      if they are properly quoted (or escaped, but prefer quotes). Eg.:

          --with-foo="1st arg with 4 spaces" --with-bar=2nd-arg-without-space

config STATIC_TOOLCHAIN

    select CC_STATIC_LIBSTDCXX if CC_GCC_4_4_or_later

config CC_STATIC_LIBSTDCXX

    bool

    prompt "Link libstdc++ statically into the gcc binary"

    default y

    depends on CC_GCC_4_4_or_later

    select WANTS_STATIC_LINK

    help

      Newer gcc versions use the PPL library which is C++ code.  Statically

      linking libstdc++ increases the likeliness that the gcc binary will

      run on machines other than the one which it was built on, without

      having to worry about distributing the matching version of libstdc++

      along with it.

config CC_GCC_SYSTEM_ZLIB

    bool

    prompt "Use system zlib"

    help

      Do not use bundled zlib, and use the zlib already available for

      the host (eg. the system library).

      If you want to build a static toolchain, you will need to also

      install the static version of zlib for your host.

      If unsure, say 'n'.

#-----------------------------------------------------------------------------

# Optimisation features

comment "Optimisation features"

# Defined in config/cc/gcc.in

config CC_GCC_USE_GRAPHITE

    prompt "Enable GRAPHITE loop optimisations"

# The way LTO works is a bit twisted.

# See: http://gcc.gnu.org/wiki/LinkTimeOptimization#Requirements

# Basically:

#   - if binutils has plugins: LTO is handled by ld/gold by loading

#     the plugin when linking

#   - if binutils does not have plugins: LTO is handled by collect2

# In any case, LTO support does not depend on plugins, but takes

# advantage of it

# Also, only the 4.5 series needs libelf for LTO; 4.6 has dropped

# the dependency.

# Defined in config/cc/gcc.in

config CC_GCC_USE_LTO

    prompt "Enable LTO"

#-----------------------------------------------------------------------------

comment "Settings for libraries running on target"

config CC_GCC_ENABLE_TARGET_OPTSPACE

    bool

    prompt "Optimize gcc libs for size"

    default y

    help

      Pass --enable-target-optspace to crossgcc's configure.

      This will compile crossgcc's libs with -Os.

config CC_GCC_LIBMUDFLAP

    bool

    prompt "Compile libmudflap"

    help

      libmudflap is a pointer-use checking tool, which can detect

      various mis-usages of pointers in C and (to some extents) C++.

      You should say 'N' here, as libmduflap generates instrumented

      code (thus it is a bit bigger and a bit slower) and requires

      re-compilation and re-link, while it exists better run-time

      alternatives (eg. DUMA, dmalloc...) that need neither re-

      compilation nor re-link.

config CC_GCC_LIBGOMP

    bool

    prompt "Compile libgomp"

    help

      libgomp is "the GNU implementation of the OpenMP Application Programming

      Interface (API) for multi-platform shared-memory parallel programming in

      C/C++ and Fortran". See:

        http://gcc.gnu.org/onlinedocs/libgomp/

      The default is 'N'. Say 'Y' if you need it, and report success/failure.

config CC_GCC_LIBSSP

    bool

    prompt "Compile libssp"

    help

      libssp is the run-time Stack-Smashing Protection library.

      The default is 'N'. Say 'Y' if you need it, and report success/failure.

config CC_GCC_LIBQUADMATH

    bool

    prompt "Compile libquadmath"

    depends on CC_GCC_HAS_LIBQUADMATH

    help

      libquadmath is a library which provides quad-precision mathematical

      functions on targets supporting the __float128 datatype. See:

        http://gcc.gnu.org/onlinedocs/libquadmath/

      The default is 'N'. Say 'Y' if you need it, and report success/failure.

#-----------------------------------------------------------------------------

comment "Misc. obscure options."

config CC_CXA_ATEXIT

    bool

    prompt "Use __cxa_atexit"

    default y

    depends on ! BARE_METAL

    help

      If you get the missing symbol "__cxa_atexit" when building C++ programs,

      you might want to try disabling this option.

config CC_GCC_DISABLE_PCH

    bool

    prompt "Do not build PCH"

    help

      Say 'y' here to not use Pre-Compiled Headers in the resulting toolchain.

      at the expense of speed when compiling C++ code.

      For some configurations (most notably canadian?), PCH are broken, and

      need to be disabled. Please see:

        http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40974

config CC_GCC_SJLJ_EXCEPTIONS

    tristate

    prompt "Use sjlj for exceptions"

    depends on ! BARE_METAL

    default m

    help

      'sjlj' is short for setjmp/longjmp.

      On some architectures, stack unwinding during exception handling

      works perfectly well without using sjlj, while on some others,

      use of sjlj is required for proper stack unwinding.

       Option  | sjlj use           | Associated ./configure switch

      ---------+--------------------+--------------------------------

         Y     | forcibly used      | --enable-sjlj-exceptions

         M     | auto               | (none, ./configure decides)

         N     | forcibly not used  | --disable-sjlj-exceptions

      It should be safe to say 'M' or 'N'.

      It can happen that ./configure is wrong in some cases. Known

      case is for ARM big endian, where you should say 'N'.

config CC_GCC_LDBL_128

    tristate

    prompt "Enable 128-bit long doubles"

    default m

    depends on CC_GCC_4_2_or_later

    help

      Saying 'Y' will force gcc to use 128-bit wide long doubles

      Saying 'N' will force gcc to use 64-bit wide long doubles

      Saying 'M' will let gcc choose (default is 128-bit for

                 glibc >= 2.4, 64-bit otherwise)

      If in doubt, keep the default, ie. 'M'.

config CC_GCC_BUILD_ID

    bool

    prompt "Enable build-id"

    depends on CC_GCC_HAS_BUILD_ID

    help

      Tells GCC to pass --build-id option to the linker for all final

      links (links performed without the -r or --relocatable option),

      if the linker supports it. If you say 'y' here, but your linker

      does not support --build-id option, a warning is issued and this

      option is ignored.

      The default is off.

choice CC_GCC_LNK_HASH_STYLE_CHOICE

    bool

    prompt "linker hash style"

    depends on CC_GCC_HAS_LNK_HASH_STYLE

    depends on BINUTILS_HAS_HASH_STYLE

config CC_GCC_LNK_HASH_STYLE_DEFAULT

    bool

    prompt "Default"

    help

      Do not specify any value, and use the default value (sysv).

config CC_GCC_LNK_HASH_STYLE_SYSV

    bool

    prompt "sysv"

    help

      Force use of the SYSV hash style.

config CC_GCC_LNK_HASH_STYLE_GNU

    bool

    prompt "gnu"

    help

      Force use of the GNU hash style.

config CC_GCC_LNK_HASH_STYLE_BOTH

    bool

    prompt "both"

    help

      Force use of both hash styles.

endchoice # CC_GCC_LNK_HASH_STYLE_CHOICE

config CC_GCC_LNK_HASH_STYLE

    string

    default ""      if CC_GCC_LNK_HASH_STYLE_DEFAULT

    default "sysv"  if CC_GCC_LNK_HASH_STYLE_SYSV

    default "gnu"   if CC_GCC_LNK_HASH_STYLE_GNU

    default "both"  if CC_GCC_LNK_HASH_STYLE_BOTH

choice CC_GCC_DEC_FLOATS_CHOICE

    bool "Decimal floats"

    default CC_GCC_DEC_FLOATS_AUTO

    help

      Choose what type of decimal floats to support.

      Note that using decimal floats requires a C library that provides

      support for fenv (namely, the fenv.h header).  This is the case

      for (e)glibc, and uClibc on x86/32.  For other C libraries, or

      uClibc on other archs, this might not be the case, so you should

      disable support for decimal floats.

      The default is to let ./configure decide.

config CC_GCC_DEC_FLOAT_AUTO

    bool "auto"

    help

      Let ./configure decide. If you say 'y' here, gcc will default to:

        - 'bid' for x86 (32- and 64-bit)

        - 'dpd' for powerpc

        - 'no' for the other architectures

config CC_GCC_DEC_FLOAT_BID

    bool "bid"

    help

      Use the 'binary integer decimal' format for decimal floats.

config CC_GCC_DEC_FLOAT_DPD

    bool "dpd"

    help

      Use the 'densely packed decimal' for decimal floats.

config CC_GCC_DEC_FLOATS_NO

    bool "no"

    help

      Do not support decimal floats. The default.

endchoice # CC_GCC_DEC_FLOATS_CHOICE

config CC_GCC_DEC_FLOATS

    string

    default ""      if CC_GCC_DEC_FLOATS_AUTO

    default "bid"   if CC_GCC_DEC_FLOATS_BID

    default "dpd"   if CC_GCC_DEC_FLOATS_DPD

    default "no"    if CC_GCC_DEC_FLOATS_NO

#-----------------------------------------------------------------------------

config CC_GCC_HAS_ARCH_OPTIONS

    bool

comment "archictecture-specific options"

    depends on CC_GCC_HAS_ARCH_OPTIONS

if ARCH_mips

source "config/cc/gcc.in.mips"

endif # ARCH_mips