# 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