libhugetlbfs: improve reproducibility

CPPFLAGS was overrided for tests, so we
missing DEBUG_PREFIX_MAP and got absolute
path in binary.

Signed-off-by: Oleksiy Obitotskyy <oobitots@cisco.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-oe/recipes-benchmark/libhugetlbfs/files/0001-tests-makefile-Append-CPPFLAGS-rather-then-override.patch

@@ -0,0 +1,31 @@
+From b6dba773491bbb7b4664dacdd87a12af860f1bd8 Mon Sep 17 00:00:00 2001
+From: Oleksiy Obitotskyy <oobitots@cisco.com>
+Date: Thu, 28 Jan 2021 05:43:33 -0800
+Subject: [PATCH] tests/makefile: Append CPPFLAGS rather then override
+
+CPPFLAGS overrided and we could miss some options needed.
+
+Upstream-Status: Submitted
+Signed-off-by: Oleksiy Obitotskyy <oobitots@cisco.com>
+---
+ tests/Makefile | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/tests/Makefile b/tests/Makefile
+index 0ca3716..d262932 100644
+--- a/tests/Makefile
++++ b/tests/Makefile
+@@ -33,8 +33,8 @@ HELPERS = get_hugetlbfs_path compare_kvers
+ HELPER_LIBS = libheapshrink.so
+ BADTOOLCHAIN = bad-toolchain.sh
+ 
+-CFLAGS = -O2 -Wall -g
+-CPPFLAGS = -I..
++CFLAGS += -O2 -Wall -g
++CPPFLAGS += -I..
+ STATIC_LIBHUGE = -Wl,--whole-archive -lhugetlbfs -Wl,--no-whole-archive
+ STATIC_LDLIBS = -Wl,--no-as-needed -lpthread
+ LDLIBS = $(STATIC_LDLIBS) -ldl -lhugetlbfs_privutils
+-- 
+2.26.2.Cisco
+

meta-oe/recipes-benchmark/libhugetlbfs/libhugetlbfs_git.bb

@@ -26,6 +26,7 @@ SRC_URI = " \
     file://0006-include-limits.h-for-PATH_MAX.patch \
     file://0001-huge_page_setup_helper-use-python3-interpreter.patch \
     file://0001-Revert-ld.hugetlbfs-fix-Ttext-segment-argument-on-AA.patch \
+    file://0001-tests-makefile-Append-CPPFLAGS-rather-then-override.patch \
 "
 
 UPSTREAM_CHECK_GITTAGREGEX = "(?P<pver>\d+(\.\d+)+)"