From be73c78420d9a23accfa9568e451046272ceab84 Mon Sep 17 00:00:00 2001
From: Riku Voipio <riku.voipio@linaro.org>
Date: Sat, 17 Oct 2020 10:30:37 +0000
Subject: [PATCH] Perf is shipped in debian in linux-tools-$version package

Extend the existing to builddeb script to build perf if BUILD_TOOLS=y is
added the make deb-pkg line

Some features of this patch I'm uncomfortable with:

1. Relative paths are resoved to absolute ones
   Especially with separate O= buildd, perf build from tools/perf dir
   fail.

2. Unsetting LDFLAGS
   make -> shell (builddeb) -> make expands variables. The LDFLAGS as
   set by toplevel makefile are for kernel, so we just unset the flag
   here.

3. Replaces ubuntu/debian packages instead attempting to fit to
   the linux-base/linux-tools-common frameworks. I think people who
   want to run "make deb-pkg" for their kernels would rather keep this
   simple.

4. More tools than just perf could be built - unfortunately most
   tools fail to have a working "install" target and/or else have
   build process inconsistent with other tools. A topic for another
   patch series.

Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
---
 scripts/package/builddeb | 31 ++++++++++++++++++++++++++++++-
 1 file changed, 30 insertions(+), 1 deletion(-)

diff --git a/scripts/package/builddeb b/scripts/package/builddeb
index c4c580f547ef..9a4caabef7dc 100755
--- a/scripts/package/builddeb
+++ b/scripts/package/builddeb
@@ -51,10 +51,12 @@ tmpdir="$objtree/debian/tmp"
 kernel_headers_dir="$objtree/debian/hdrtmp"
 libc_headers_dir="$objtree/debian/headertmp"
 dbg_dir="$objtree/debian/dbgtmp"
+tools_dir="$objtree/debian/toolstmp"
 packagename=linux-image-$version
 kernel_headers_packagename=linux-headers-$version
 libc_headers_packagename=linux-libc-dev
 dbg_packagename=$packagename-dbg
+tools_packagename=linux-tools-$version
 
 if [ "$ARCH" = "um" ] ; then
 	packagename=user-mode-linux-$version
@@ -77,7 +79,7 @@ esac
 BUILD_DEBUG=$(if_enabled_echo CONFIG_DEBUG_INFO Yes)
 
 # Setup the directory structure
-rm -rf "$tmpdir" "$kernel_headers_dir" "$libc_headers_dir" "$dbg_dir" $objtree/debian/files
+rm -rf "$tmpdir" "$kernel_headers_dir" "$libc_headers_dir" "$dbg_dir" "$tools_dir" $objtree/debian/files
 mkdir -m 755 -p "$tmpdir/DEBIAN"
 mkdir -p "$tmpdir/lib" "$tmpdir/boot"
 mkdir -p "$kernel_headers_dir/lib/modules/$version/"
@@ -205,4 +207,31 @@ if [ -n "$BUILD_DEBUG" ] ; then
 	create_package "$dbg_packagename" "$dbg_dir"
 fi
 
+if [ -n "$BUILD_TOOLS" ]
+then
+	# HACK - change output dir from relative to absolute
+	mkdir -p $tools_dir
+	tools_dest=`readlink -f $tools_dir`
+	if [ -n "$O" ]
+	then
+		output=`readlink -f $objtree`
+		mkdir -p $output/tools/perf
+		output="O=$output/tools/perf"
+	fi
+   $MAKE V=1 -C $srctree/tools/perf $output LDFLAGS= srctree=$KBUILD_SRC prefix=$tools_dest/usr install
+	cat <<EOF >> debian/control
+
+Package: $tools_packagename
+Architecture: any
+Replaces: linux-base, linux-tools-common
+Depends: \${shlibs:Depends}
+Description: Performance analysis tools for Linux $version
+ This package contains the 'perf' performance analysis tools for Linux
+ kernel version $version .
+EOF
+
+	dpkg-shlibdeps $tools_dest/usr/bin/* $tools_dest/usr/lib*/traceevent/plugins/*
+	create_package "$tools_packagename" "$tools_dir"
+fi
+
 exit 0
-- 
2.20.1