From: Luca Boccassi <bl...@debian.org>
Generate a libbpf.pc file at build time so that users can rely
on pkg-config to find the library, its CFLAGS and LDFLAGS.
Signed-off-by: Luca Boccassi <bl...@debian.org>
---
v2: use QUIET_GEN instead of QUIET_LINK to generate pc file,
save kernel version in its own variable instead of calling
make inline
v3: use LIBBPF_VERSION instead of kernel_version
v4: use -I${prefix}/include rather than -I${prefix}/include/bpf
in the Cflags field as requested, to keep consistency with
how the headers are used now and to avoid a dependency from
the pc file to the headers installation
tools/lib/bpf/.gitignore | 1 +
tools/lib/bpf/Makefile | 18 +++++++++++++++---
tools/lib/bpf/libbpf.pc.template | 11 +++++++++++
3 files changed, 27 insertions(+), 3 deletions(-)
create mode 100644 tools/lib/bpf/libbpf.pc.template
diff --git a/tools/lib/bpf/.gitignore b/tools/lib/bpf/.gitignore
index 4db74758c674..7d9e182a1f51 100644
--- a/tools/lib/bpf/.gitignore
+++ b/tools/lib/bpf/.gitignore
@@ -1,3 +1,4 @@
libbpf_version.h
+libbpf.pc
FEATURE-DUMP.libbpf
test_libbpf
diff --git a/tools/lib/bpf/Makefile b/tools/lib/bpf/Makefile
index 61aaacf0cfa1..891fe3da1410 100644
--- a/tools/lib/bpf/Makefile
+++ b/tools/lib/bpf/Makefile
@@ -80,6 +80,7 @@ libdir_SQ = $(subst ','\'',$(libdir))
libdir_relative_SQ = $(subst ','\'',$(libdir_relative))
LIB_FILE = libbpf.a libbpf.so
+PC_FILE = libbpf.pc
VERSION = $(BPF_VERSION)
PATCHLEVEL = $(BPF_PATCHLEVEL)
@@ -137,7 +138,7 @@ GLOBAL_SYM_COUNT = $(shell readelf -s --wide $(BPF_IN) | \
VERSIONED_SYM_COUNT = $(shell readelf -s --wide $(OUTPUT)libbpf.so | \
grep -Eo '[^ ]+@LIBBPF_' | cut -d@ -f1 | sort -u
| wc -l)
-CMD_TARGETS = $(LIB_FILE)
+CMD_TARGETS = $(LIB_FILE) $(PC_FILE)
CXX_TEST_TARGET = $(OUTPUT)test_libbpf
@@ -180,6 +181,12 @@ $(OUTPUT)libbpf.a: $(BPF_IN)
$(OUTPUT)test_libbpf: test_libbpf.cpp $(OUTPUT)libbpf.a
$(QUIET_LINK)$(CXX) $(INCLUDES) $^ -lelf -o $@
+$(OUTPUT)libbpf.pc:
+ $(QUIET_GEN)sed -e "s|@PREFIX@|$(prefix)|" \
+ -e "s|@LIBDIR@|$(libdir_SQ)|" \
+ -e "s|@VERSION@|$(LIBBPF_VERSION)|" \
+ < $@.template > $@
+
check: check_abi
check_abi: $(OUTPUT)libbpf.so
@@ -209,7 +216,12 @@ install_headers:
$(call do_install,libbpf.h,$(prefix)/include/bpf,644);
$(call do_install,btf.h,$(prefix)/include/bpf,644);
-install: install_lib
+install_pkgconfig: $(PC_FILE)
+ $(call QUIET_INSTALL, $(PC_FILE)) \
+ $(call do_install,$(PC_FILE),$(libdir_SQ)/pkgconfig,644)
+
+
+install: install_lib install_pkgconfig
### Cleaning rules
@@ -219,7 +231,7 @@ config-clean:
clean:
$(call QUIET_CLEAN, libbpf) $(RM) $(TARGETS) $(CXX_TEST_TARGET) \
- *.o *~ *.a *.so .*.d .*.cmd LIBBPF-CFLAGS
+ *.o *~ *.a *.so .*.d .*.cmd *.pc LIBBPF-CFLAGS
$(call QUIET_CLEAN, core-gen) $(RM) $(OUTPUT)FEATURE-DUMP.libbpf
diff --git a/tools/lib/bpf/libbpf.pc.template b/tools/lib/bpf/libbpf.pc.template
new file mode 100644
index 000000000000..0ecd334c109f
--- /dev/null
+++ b/tools/lib/bpf/libbpf.pc.template
@@ -0,0 +1,11 @@
+prefix=@PREFIX@
+libdir=@LIBDIR@
+includedir=${prefix}/include
+
+Name: libbpf
+URL: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
+Description: Linux kernel BPF library
+Version: @VERSION@
+Libs: -L${libdir} -lbpf
+Requires.private: libelf
+Cflags: -I${includedir}
--
2.20.1
