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@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@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'.