programs/kernel-selftests: build pahole from source code

pahole v1.25 introduced the new option --skip_encoding_btf_inconsistent_proto
which is required to build bpf selftest. The pahole binary provided by
distribution may be lower version that cannot support this option.

== fix issue ==

  BTF [M] tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.ko
pahole: unrecognized option '--skip_encoding_btf_inconsistent_proto'

Signed-off-by: Yujie Liu <[email protected]>
Signed-off-by: Philip Li <[email protected]>

Author: Yujie-Liu

programs/kernel-selftests/pkg/PKGBUILD

@@ -4,8 +4,8 @@ pkgrel=1
 arch=('i686' 'x86_64' 'aarch64')
 url="https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git"
 license=('GPL')
-source=('https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git')
-md5sums=('SKIP')
+source=('https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git' 'https://git.kernel.org/pub/scm/devel/pahole/pahole.git')
+md5sums=('SKIP' 'SKIP')
 
 # Download kernel from git.kernel.org.
 # If the kernel has been download into the computer, you can copy it to ${srcdir}.
@@ -43,6 +43,17 @@ build_tools()
 	make
 }
 
+build_pahole()
+{
+	cd "${srcdir}/pahole"
+
+	mkdir build
+	cd build
+	mkdir -p $pkgdir/usr
+	cmake -D__LIB=lib -DCMAKE_INSTALL_PREFIX=$pkgdir/usr ..
+	make install
+}
+
 install_selftests()
 {
 	cd "${srcdir}/linux"
@@ -72,6 +83,7 @@ build()
 	benchmark_path="${pkgdir}/lkp/benchmarks/${pkgname}"
 	mkdir -p "${benchmark_path}"
 	build_tools
+	build_pahole
 	install_selftests
 }
 

programs/kernel-selftests/pkg/depends

@@ -2,7 +2,6 @@ gcc
 g++
 gcc-multilib
 xz-utils
-dwarves
 libbpf-dev
 libc6-dev
 libc-bin
@@ -32,6 +31,8 @@ libnuma-dev
 libmount-dev
 libpci3
 libelf-dev
+libdw-dev
+libdwarf-dev
 libfuse-dev
 gcc-multilib
 pkg-config
@@ -85,6 +86,7 @@ arping
 linux-perf
 file
 clang
+lld
 libclang-dev
 llvm-dev
 attr

programs/kernel-selftests/pkg/depends-dev

@@ -3,6 +3,8 @@ libpci-dev
 gettext
 systemd
 libelf-dev
+libdw-dev
+libdwarf-dev
 libudev1
 libudev-dev
 pkg-config
@@ -19,3 +21,4 @@ automake
 libtool
 m4
 libbpf-dev
+cmake