Using cscope and/or TAGS files for navigating the source code is useful.
Add simple targets to the Makefile to generate the index files for both
tools.
Acked-by: Andrii Nakryiko <andriin@xxxxxx>
Tested-by: Andrii Nakryiko <andriin@xxxxxx>
Signed-off-by: Toke Høiland-Jørgensen <toke@xxxxxxxxxx>
---
v2:
- Use lower-case 'tags' for Makefile target
- Use -I to cscope instead of -k
- Support both ctags and etags
- Pass options directly to cscope instead of putting them in cscope.files
- Use 'ls' to list files
tools/lib/bpf/.gitignore | 3 +++
tools/lib/bpf/Makefile | 12 +++++++++++-
2 files changed, 14 insertions(+), 1 deletion(-)
diff --git a/tools/lib/bpf/.gitignore b/tools/lib/bpf/.gitignore
index d9e9dec04605..12382b0c71c7 100644
--- a/tools/lib/bpf/.gitignore
+++ b/tools/lib/bpf/.gitignore
@@ -3,3 +3,6 @@ libbpf.pc
FEATURE-DUMP.libbpf
test_libbpf
libbpf.so.*
+TAGS
+tags
+cscope.*
diff --git a/tools/lib/bpf/Makefile b/tools/lib/bpf/Makefile
index c6f94cffe06e..10b77644a17c 100644
--- a/tools/lib/bpf/Makefile
+++ b/tools/lib/bpf/Makefile
@@ -133,6 +133,8 @@ LIB_TARGET := $(addprefix $(OUTPUT),$(LIB_TARGET))
LIB_FILE := $(addprefix $(OUTPUT),$(LIB_FILE))
PC_FILE := $(addprefix $(OUTPUT),$(PC_FILE))
+TAGS_PROG := $(if $(shell which etags 2>/dev/null),etags,ctags)
+
GLOBAL_SYM_COUNT = $(shell readelf -s --wide $(BPF_IN) | \
cut -d "@" -f1 | sed 's/_v[0-9]_[0-9]_[0-9].*//' | \
awk '/GLOBAL/ && /DEFAULT/ && !/UND/ {print $$8}' | \
@@ -262,7 +264,7 @@ clean:
-PHONY += force elfdep bpfdep
+PHONY += force elfdep bpfdep cscope tags
force:
elfdep:
@@ -271,6 +273,14 @@ elfdep:
bpfdep:
@if [ "$(feature-bpf)" != "1" ]; then echo "BPF API too old"; exit 1 ; fi
+cscope:
+ ls *.c *.h > cscope.files
+ cscope -b -q -I $(srctree)/include -f cscope.out
+
+tags:
+ rm -f TAGS tags
+ ls *.c *.h | xargs $(TAGS_PROG) -a
+
# Declare the contents of the .PHONY variable as phony. We keep that
# information in a variable so we can use it in if_changed and friends.
.PHONY: $(PHONY)
--
2.23.0
