yann@2041: config CC_GCC_ENABLE_TARGET_OPTSPACE
yann@2041:     bool
yann@2041:     prompt "Optimize gcc libs for size"
yann@2041:     default y
yann@2041:     help
yann@2041:       Pass --enable-target-optspace to crossgcc's configure.
yann@2041:       
yann@2041:       This will compile crossgcc's libs with -Os.
yann@2041: 
yann@2122: config CC_GCC_USE_GRAPHITE
yann@2122:     bool
yann@2122:     prompt "Enable GRAPHITE loop optimisations"
yann@2122:     default y
yann@2122:     depends on CC_GCC_HAS_GRAPHITE
yann@2122:     select CC_GCC_USE_PPL_CLOOG
yann@2122:     help
yann@2122:       Enable the GRAPHITE loop optimsations.
yann@2122:       
yann@2122:       This requires the PPL and CLooG companion libraries, and
yann@2122:       those will be automatically build for you.
yann@2122:       
yann@2122:       On some systems (eg. Cygwin), PPL and/or CLooG may not
yann@2122:       build properly (yet), so you'll have to say 'N' here.
yann@2122: 
yann@2122: config CC_GCC_USE_LTO
yann@2122:     bool
yann@2122:     prompt "Enable LTO"
yann@2122:     default y
yann@2122:     depends on CC_GCC_HAS_LTO
yann@2122:     select CC_GCC_USE_LIBELF
yann@2122:     help
yann@2122:       Enable the Link Time Optimisations.
yann@2122:       
yann@2122:       This will require the libelf companion library, and it
yann@2122:       wil be build automatically for you.
yann@2122: 
js@2045: config CC_STATIC_LIBSTDCXX
js@2045:     bool
js@2045:     prompt "Link libstdc++ statically into the gcc binary"
js@2045:     default y
js@2045:     depends on CC_GCC_4_4_or_later
js@2045:     help
js@2045:       Newer gcc versions use the PPL library which is C++ code.  Statically
js@2045:       linking libstdc++ increases the likeliness that the gcc binary will
js@2045:       run on machines other than the one which it was built on, without
js@2045:       having to worry about distributing the matching version of libstdc++
js@2045:       along with it.
js@2045: 
yann@2041: comment "Misc. obscure options."
yann@2041: 
yann@2041: config CC_CXA_ATEXIT
yann@2041:     bool
yann@2041:     prompt "Use __cxa_atexit"
yann@2041:     default y
yann@2041:     depends on ! BARE_METAL
yann@2041:     help
yann@2041:       If you get the missing symbol "__cxa_atexit" when building C++ programs,
yann@2041:       you might want to try disabling this option.
yann@2041: 
yann@2041: config CC_GCC_DISABLE_PCH
yann@2041:     bool
yann@2041:     prompt "Do not build PCH"
yann@2041:     default n
yann@2041:     help
yann@2041:       Say 'y' here to not use Pre-Compiled Headers in the resulting toolchain.
yann@2041:       at the expense of speed when compiling C++ code.
yann@2041:       
yann@2041:       For some configurations (most notably canadian?), PCH are broken, and
yann@2041:       need to be disabled. Please see:
yann@2041:         http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40974
yann@2041: 
yann@2042: config CC_GCC_SJLJ_EXCEPTIONS
yann@2042:     tristate
yann@2041:     prompt "Use sjlj for exceptions"
yann@2054:     depends on ! BARE_METAL
yann@2042:     default m
yann@2041:     help
yann@2042:       'sjlj' is short for setjmp/longjmp.
yann@2041:       
yann@2042:       On some architectures, stack unwinding during exception handling
yann@2042:       works perfectly well without using sjlj, while on some others,
yann@2042:       use of sjlj is required for proper stack unwinding.
yann@2041:       
yann@2042:        Option  | sjlj use           | Associated ./configure switch
yann@2042:       ---------+--------------------+--------------------------------
yann@2042:          Y     | forcibly used      | --enable-sjlj-exceptions
yann@2042:          M     | auto               | (none, ./configure decides)
yann@2042:          N     | forcibly not used  | --disable-sjlj-exceptions
yann@2041:       
yann@2042:       It should be safe to say 'M' or 'N'.
yann@2042:       
yann@2042:       It can happen that ./configure is wrong in some cases. Known
yann@2042:       case is for ARM big endian, where you should say 'N'.
yann@2043: 
yann@2043: config CC_GCC_LIBMUDFLAP
yann@2043:     bool
yann@2043:     prompt "Compile libmudflap"
yann@2043:     default n
yann@2043:     help
yann@2043:       libmudflap is a pointer-use checking tool, which can detect
yann@2043:       various mis-usages of pointers in C and (to some extents) C++.
yann@2043:       
yann@2043:       You should say 'N' here, as libmduflap generates instrumented
yann@2043:       code (thus it is a bit bigger and a bit slower) and requires
yann@2043:       re-compilation and re-link, while it exists better run-time
yann@2043:       alternatives (eg. DUMA, dmalloc...) that need neither re-
yann@2043:       compilation nor re-link.