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