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Makefile: get libbpf version from libbpf.map

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Similarly to kernel-side Makefile ([0]), get libbpf version by looking
at latest version in libbpf.map.

  [0] https://patchwork.ozlabs.org/patch/1147232/

Signed-off-by: Andrii Nakryiko <andriin@fb.com>
This commit is contained in:
Andrii Nakryiko
2019-08-14 15:59:54 -07:00
committed by Andrii Nakryiko
parent e78a36f4b0
commit d60f568961
1 changed files with 8 additions and 9 deletions
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17
src/Makefile
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@@ -1,10 +1,9 @@
# SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
VERSION = 0
PATCHLEVEL = 0
EXTRAVERSION = 4
LIBBPF_VERSION = $(VERSION).$(PATCHLEVEL).$(EXTRAVERSION)
LIBBPF_VERSION := $(shell \
grep -oE '^LIBBPF_([0-9.]+)' libbpf.map | \
sort -rV | head -n1 | cut -d'_' -f2)
LIBBPF_MAJOR_VERSION := $(firstword $(subst ., ,$(LIBBPF_VERSION)))
TOPDIR = ..
@@ -40,7 +39,7 @@ OBJS := $(addprefix $(OBJDIR)/,bpf.o btf.o libbpf.o libbpf_errno.o netlink.o \
LIBS := $(OBJDIR)/libbpf.a
ifndef BUILD_STATIC_ONLY
LIBS += $(OBJDIR)/libbpf.so \
$(OBJDIR)/libbpf.so.$(VERSION) \
$(OBJDIR)/libbpf.so.$(LIBBPF_MAJOR_VERSION) \
$(OBJDIR)/libbpf.so.$(LIBBPF_VERSION)
VERSION_SCRIPT := libbpf.map
endif
@@ -71,15 +70,15 @@ all: $(LIBS) $(PC_FILE)
$(OBJDIR)/libbpf.a: $(OBJS)
$(AR) rcs $@ $^
$(OBJDIR)/libbpf.so: $(OBJDIR)/libbpf.so.$(VERSION)
$(OBJDIR)/libbpf.so: $(OBJDIR)/libbpf.so.$(LIBBPF_MAJOR_VERSION)
ln -sf $(^F) $@
$(OBJDIR)/libbpf.so.$(VERSION): $(OBJDIR)/libbpf.so.$(LIBBPF_VERSION)
$(OBJDIR)/libbpf.so.$(LIBBPF_MAJOR_VERSION): $(OBJDIR)/libbpf.so.$(LIBBPF_VERSION)
ln -sf $(^F) $@
$(OBJDIR)/libbpf.so.$(LIBBPF_VERSION): $(OBJS)
$(CC) -shared $(ALL_LDFLAGS) -Wl,--version-script=$(VERSION_SCRIPT) \
-Wl,-soname,libbpf.so.$(VERSION) \
-Wl,-soname,libbpf.so.$(LIBBPF_MAJOR_VERSION) \
$^ -o $@
$(OBJDIR)/libbpf.pc: