From 6bf6affe18dafea6ef12036001162ac7f2dbf738 Mon Sep 17 00:00:00 2001
From: Stanislav Fomichev <sdf@google.com>
Date: Mon, 2 Dec 2019 13:59:31 -0800
Subject: selftests/bpf: Bring back c++ include/link test

Commit 5c26f9a78358 ("libbpf: Don't use cxx to test_libpf target")
converted existing c++ test to c. We still want to include and
link against libbpf from c++ code, so reinstate this test back,
this time in a form of a selftest with a clear comment about
its purpose.

v2:
* -lelf -> $(LDLIBS) (Andrii Nakryiko)

Fixes: 5c26f9a78358 ("libbpf: Don't use cxx to test_libpf target")
Signed-off-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/bpf/20191202215931.248178-1-sdf@google.com
---
 tools/lib/bpf/.gitignore    |  1 -
 tools/lib/bpf/Makefile      |  5 +----
 tools/lib/bpf/test_libbpf.c | 20 --------------------
 3 files changed, 1 insertion(+), 25 deletions(-)
 delete mode 100644 tools/lib/bpf/test_libbpf.c

(limited to 'tools/lib')

diff --git a/tools/lib/bpf/.gitignore b/tools/lib/bpf/.gitignore
index 35bf013e368c..e97c2ebcf447 100644
--- a/tools/lib/bpf/.gitignore
+++ b/tools/lib/bpf/.gitignore
@@ -1,7 +1,6 @@
 libbpf_version.h
 libbpf.pc
 FEATURE-DUMP.libbpf
-test_libbpf
 libbpf.so.*
 TAGS
 tags
diff --git a/tools/lib/bpf/Makefile b/tools/lib/bpf/Makefile
index 3d3d024f7b94..defae23a0169 100644
--- a/tools/lib/bpf/Makefile
+++ b/tools/lib/bpf/Makefile
@@ -152,7 +152,7 @@ GLOBAL_SYM_COUNT = $(shell readelf -s --wide $(BPF_IN_SHARED) | \
 VERSIONED_SYM_COUNT = $(shell readelf -s --wide $(OUTPUT)libbpf.so | \
 			      grep -Eo '[^ ]+@LIBBPF_' | cut -d@ -f1 | sort -u | wc -l)
 
-CMD_TARGETS = $(LIB_TARGET) $(PC_FILE) $(OUTPUT)test_libbpf
+CMD_TARGETS = $(LIB_TARGET) $(PC_FILE)
 
 all: fixdep
 	$(Q)$(MAKE) all_cmd
@@ -196,9 +196,6 @@ $(OUTPUT)libbpf.so.$(LIBBPF_VERSION): $(BPF_IN_SHARED)
 $(OUTPUT)libbpf.a: $(BPF_IN_STATIC)
 	$(QUIET_LINK)$(RM) $@; $(AR) rcs $@ $^
 
-$(OUTPUT)test_libbpf: test_libbpf.c $(OUTPUT)libbpf.a
-	$(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) $(INCLUDES) $^ -lelf -o $@
-
 $(OUTPUT)libbpf.pc:
 	$(QUIET_GEN)sed -e "s|@PREFIX@|$(prefix)|" \
 		-e "s|@LIBDIR@|$(libdir_SQ)|" \
diff --git a/tools/lib/bpf/test_libbpf.c b/tools/lib/bpf/test_libbpf.c
deleted file mode 100644
index f0eb2727b766..000000000000
--- a/tools/lib/bpf/test_libbpf.c
+++ /dev/null
@@ -1,20 +0,0 @@
-/* SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) */
-#include "libbpf.h"
-#include "bpf.h"
-#include "btf.h"
-
-/* do nothing, just make sure we can link successfully */
-
-int main(int argc, char *argv[])
-{
-	/* libbpf.h */
-	libbpf_set_print(NULL);
-
-	/* bpf.h */
-	bpf_prog_get_fd_by_id(0);
-
-	/* btf.h */
-	btf__new(NULL, 0);
-
-	return 0;
-}
-- 
cgit