Supporting two different intermediate-artifact packaging schemes was only ever intended as a temporary transition. This has so far caused no problems for powerpc, after a small fix for how the arch invoked ar. So now allow any arch to select the option, continue defaulting to N. Cc: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx> Signed-off-by: Nicholas Piggin <npiggin@xxxxxxxxx> --- The next step will be to have archs always select THIN_ARCHIVES when they are known to work. Then remove the option entirely. x86 has always just worked for me, so that should be easy. arch/Kconfig | 19 ++++++++++++++++--- arch/powerpc/Kconfig | 8 -------- 2 files changed, 16 insertions(+), 11 deletions(-) diff --git a/arch/Kconfig b/arch/Kconfig index 6c00e5b00f8b..28e64cb65dd5 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -511,10 +511,23 @@ config CC_STACKPROTECTOR_STRONG endchoice config THIN_ARCHIVES - bool + bool "Build the kernel using thin archives" + default n help - Select this if the architecture wants to use thin archives - instead of ld -r to create the built-in.o files. + Enable this if you want to use thin archives (binutils `ar` thin + archive format) rather than `ld -r`, to create the built-in.o and + other intermediate packaging steps in the kernel build. + + This option reduces disk space for builds, especially important for + debug builds and IO-constrained environments. It gives the linker + more flexibility in assembling sections. And it is more amenable to + link-time-optimization that may be implemented in future. + + The intention is for all architectures to move to thin archives + soon, and the ld -r support code removed. + + If unsure, say N. + Kernel hackers, say Y and test/fix your arch! config LD_DEAD_CODE_DATA_ELIMINATION bool diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index 6eb70c96ec5e..9274d9faf122 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -483,14 +483,6 @@ config MPROFILE_KERNEL depends on PPC64 && CPU_LITTLE_ENDIAN def_bool !DISABLE_MPROFILE_KERNEL -config USE_THIN_ARCHIVES - bool "Build the kernel using thin archives" - default n - select THIN_ARCHIVES - help - Build the kernel using thin archives. - If you're unsure say N. - config IOMMU_HELPER def_bool PPC64 -- 2.11.0 -- To unsubscribe from this list: send the line "unsubscribe linux-kbuild" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
