tools/dwarves: add host package

dwarves is a set of tools that use the debugging information inserted in
ELF binaries by compilers such as GCC. Utilities in the dwarves suite
include pahole, which can be used to find alignment holes in structs and
classes, and also extracts other information such as CPU cacheline
alignment, helping pack those structures to achieve more cache hits.

These tools are also used to encode and read the BTF type information
format used with the bpf syscall, making this a Linux build dependency
when using kernel BTF information.

Signed-off-by: Tony Ambardar <itugrok@yahoo.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
[bump to 1.23, add elfutils dep, drop host lib usage, drop cmake release
target, use RM macro]
Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>
This commit is contained in:
Tony Ambardar 2020-11-24 14:15:09 -08:00 committed by Stijn Tintel
parent 6300313dee
commit 02850d7c9c
3 changed files with 45 additions and 0 deletions

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@ -247,6 +247,14 @@ comment "Binary tools"
source "toolchain/binutils/Config.in"
config DWARVES
bool
prompt "Build pahole" if TOOLCHAINOPTS
depends on !HOST_OS_MACOS
default n
help
Enable if you want to build pahole and the dwarves tools.
comment "Compiler"
depends on TOOLCHAINOPTS

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@ -84,7 +84,9 @@ endif
ifeq ($(HOST_OS),Darwin)
tools-y += bash
else
$(curdir)/dwarves/compile += $(curdir)/elfutils/compile
$(curdir)/elfutils/compile := $(curdir)/zlib/compile
tools-$(CONFIG_DWARVES) += dwarves
tools-y += elfutils
endif

35
tools/dwarves/Makefile Normal file
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@ -0,0 +1,35 @@
# SPDX-License-Identifier: GPL-2.0-only
include $(TOPDIR)/rules.mk
PKG_NAME:=dwarves
PKG_SOURCE_VERSION:=v1.23
PKG_SOURCE_PROTO:=git
PKG_SOURCE_URL:=https://git.kernel.org/pub/scm/devel/pahole/pahole.git
PKG_MIRROR_HASH:=6ab1bb1dbdf6c73ffcf485d909229dc1da1a3d24efd213e92c56489b58d6a4bd
PKG_LICENSE:=GPL-2.0-only
PKG_LICENSE_FILES:=COPYING
HOST_BUILD_PARALLEL:=1
include $(INCLUDE_DIR)/host-build.mk
include $(INCLUDE_DIR)/cmake.mk
CMAKE_HOST_OPTIONS += \
-D__LIB=lib \
-DCMAKE_INSTALL_RPATH="$(STAGING_DIR_HOST)/lib" \
-DCMAKE_SKIP_RPATH=FALSE
define Host/Clean
$(RM) $(STAGING_DIR_HOST)/bin/{codiff,ctracer,dtagnames,pahole,pdwtags}
$(RM) $(STAGING_DIR_HOST)/bin/{pfunct,pglobal,prefcnt,scncopy,syscse}
$(RM) $(STAGING_DIR_HOST)/bin/{ostra-cg,btfdiff,fullcircle}
$(RM) $(STAGING_DIR_HOST)/lib/libdwarves*.so*
$(RM) $(STAGING_DIR_HOST)/share/man/man1/pahole.1
rm -rf $(STAGING_DIR_HOST)/include/dwarves
rm -rf $(STAGING_DIR_HOST)/share/dwarves
$(call Host/Clean/Default)
endef
$(eval $(call HostBuild))