diff options
| -rw-r--r-- | arch/Kconfig | 19 | ||||
| -rw-r--r-- | arch/arm/Kconfig | 2 | ||||
| -rw-r--r-- | lib/Kconfig.debug | 3 |
3 files changed, 9 insertions, 15 deletions
diff --git a/arch/Kconfig b/arch/Kconfig index 61130b88964b..31220f512b16 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -232,17 +232,14 @@ config HAVE_EFFICIENT_UNALIGNED_ACCESS config ARCH_USE_BUILTIN_BSWAP bool help - Modern versions of GCC (since 4.4) have builtin functions - for handling byte-swapping. Using these, instead of the old - inline assembler that the architecture code provides in the - __arch_bswapXX() macros, allows the compiler to see what's - happening and offers more opportunity for optimisation. In - particular, the compiler will be able to combine the byteswap - with a nearby load or store and use load-and-swap or - store-and-swap instructions if the architecture has them. It - should almost *never* result in code which is worse than the - hand-coded assembler in <asm/swab.h>. But just in case it - does, the use of the builtins is optional. + GCC and Clang have builtin functions for handling byte-swapping. + Using these allows the compiler to see what's happening and + offers more opportunity for optimisation. In particular, the + compiler will be able to combine the byteswap with a nearby load + or store and use load-and-swap or store-and-swap instructions if + the architecture has them. It should almost *never* result in code + which is worse than the hand-coded assembler in <asm/swab.h>. + But just in case it does, the use of the builtins is optional. Any architecture with load-and-swap or store-and-swap instructions should set this. And it shouldn't hurt to set it diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 4fb985b76e97..ff61891abe53 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -1161,8 +1161,6 @@ config AEABI disambiguate both ABIs and allow for backward compatibility support (selected with CONFIG_OABI_COMPAT). - To use this you need GCC version 4.0.0 or later. - config OABI_COMPAT bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)" depends on AEABI && !THUMB2_KERNEL diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index 3034e294d50d..e89c024dcbdf 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -332,8 +332,7 @@ config DEBUG_INFO_COMPRESSED_ZLIB depends on $(cc-option,-gz=zlib) depends on $(ld-option,--compress-debug-sections=zlib) help - Compress the debug information using zlib. Requires GCC 5.0+ or Clang - 5.0+, binutils 2.26+, and zlib. + Compress the debug information using zlib. Users of dpkg-deb via debian/rules may find an increase in size of their debug .deb packages with this config set, due to the |