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authorLinus Torvalds <torvalds@linux-foundation.org>2016-10-14 14:26:58 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-10-14 14:26:58 -0700
commit84d69848c97faab0c25aa2667b273404d2e2a64a (patch)
tree594f3fe1b271b5255a1c5281e36f8bf938acd1c0 /arch/Kconfig
parentd4d24d2d0a7ea3b62efd7336bfc2344e29b36bc5 (diff)
parent590abbdd273304b55824bcb9ea91840ea375575d (diff)
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Merge branch 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild
Pull kbuild updates from Michal Marek: - EXPORT_SYMBOL for asm source by Al Viro. This does bring a regression, because genksyms no longer generates checksums for these symbols (CONFIG_MODVERSIONS). Nick Piggin is working on a patch to fix this. Plus, we are talking about functions like strcpy(), which rarely change prototypes. - Fixes for PPC fallout of the above by Stephen Rothwell and Nick Piggin - fixdep speedup by Alexey Dobriyan. - preparatory work by Nick Piggin to allow architectures to build with -ffunction-sections, -fdata-sections and --gc-sections - CONFIG_THIN_ARCHIVES support by Stephen Rothwell - fix for filenames with colons in the initramfs source by me. * 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild: (22 commits) initramfs: Escape colons in depfile ppc: there is no clear_pages to export powerpc/64: whitelist unresolved modversions CRCs kbuild: -ffunction-sections fix for archs with conflicting sections kbuild: add arch specific post-link Makefile kbuild: allow archs to select link dead code/data elimination kbuild: allow architectures to use thin archives instead of ld -r kbuild: Regenerate genksyms lexer kbuild: genksyms fix for typeof handling fixdep: faster CONFIG_ search ia64: move exports to definitions sparc32: debride memcpy.S a bit [sparc] unify 32bit and 64bit string.h sparc: move exports to definitions ppc: move exports to definitions arm: move exports to definitions s390: move exports to definitions m68k: move exports to definitions alpha: move exports to actual definitions x86: move exports to actual definitions ...
Diffstat (limited to 'arch/Kconfig')
-rw-r--r--arch/Kconfig21
1 files changed, 21 insertions, 0 deletions
diff --git a/arch/Kconfig b/arch/Kconfig
index 180ea33164dc..11d349561ece 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -450,6 +450,27 @@ config CC_STACKPROTECTOR_STRONG
endchoice
+config THIN_ARCHIVES
+ bool
+ help
+ Select this if the architecture wants to use thin archives
+ instead of ld -r to create the built-in.o files.
+
+config LD_DEAD_CODE_DATA_ELIMINATION
+ bool
+ help
+ Select this if the architecture wants to do dead code and
+ data elimination with the linker by compiling with
+ -ffunction-sections -fdata-sections and linking with
+ --gc-sections.
+
+ This requires that the arch annotates or otherwise protects
+ its external entry points from being discarded. Linker scripts
+ must also merge .text.*, .data.*, and .bss.* correctly into
+ output sections. Care must be taken not to pull in unrelated
+ sections (e.g., '.text.init'). Typically '.' in section names
+ is used to distinguish them from label names / C identifiers.
+
config HAVE_ARCH_WITHIN_STACK_FRAMES
bool
help