mirror of
https://github.com/netdata/libbpf.git
synced 2026-03-26 11:19:06 +08:00
734b3f0afe
Currently we hardcode "gcc", which means we get a bogus result any time a non-default CC is passed to Make. In fact, it's bogus even when CC is not explicitly set, since Make's default is "cc", which isn't necessarily the same as "gcc". Fix the issue by passing the compiler to use to check-reallocarray.sh. Signed-off-by: Thomas Hebb <tommyhebb@gmail.com>
147 lines
3.9 KiB
Makefile
147 lines
3.9 KiB
Makefile
# SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
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LIBBPF_VERSION := $(shell \
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grep -oE '^LIBBPF_([0-9.]+)' libbpf.map | \
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sort -rV | head -n1 | cut -d'_' -f2)
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LIBBPF_MAJOR_VERSION := $(firstword $(subst ., ,$(LIBBPF_VERSION)))
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TOPDIR = ..
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INCLUDES := -I. -I$(TOPDIR)/include -I$(TOPDIR)/include/uapi
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ALL_CFLAGS := $(INCLUDES)
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FEATURE_REALLOCARRAY := $(shell $(TOPDIR)/scripts/check-reallocarray.sh $(CC))
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ifneq ($(FEATURE_REALLOCARRAY),)
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ALL_CFLAGS += -DCOMPAT_NEED_REALLOCARRAY
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endif
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SHARED_CFLAGS += -fPIC -fvisibility=hidden -DSHARED
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CFLAGS ?= -g -O2 -Werror -Wall
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ALL_CFLAGS += $(CFLAGS) -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64
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ALL_LDFLAGS += $(LDFLAGS)
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ifdef NO_PKG_CONFIG
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ALL_LDFLAGS += -lelf -lz
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else
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PKG_CONFIG ?= pkg-config
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ALL_CFLAGS += $(shell $(PKG_CONFIG) --cflags libelf)
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ALL_LDFLAGS += $(shell $(PKG_CONFIG) --libs libelf)
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endif
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OBJDIR ?= .
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SHARED_OBJDIR := $(OBJDIR)/sharedobjs
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STATIC_OBJDIR := $(OBJDIR)/staticobjs
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OBJS := bpf.o btf.o libbpf.o libbpf_errno.o netlink.o \
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nlattr.o str_error.o libbpf_probes.o bpf_prog_linfo.o xsk.o \
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btf_dump.o hashmap.o ringbuf.o
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SHARED_OBJS := $(addprefix $(SHARED_OBJDIR)/,$(OBJS))
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STATIC_OBJS := $(addprefix $(STATIC_OBJDIR)/,$(OBJS))
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STATIC_LIBS := $(OBJDIR)/libbpf.a
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ifndef BUILD_STATIC_ONLY
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SHARED_LIBS := $(OBJDIR)/libbpf.so \
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$(OBJDIR)/libbpf.so.$(LIBBPF_MAJOR_VERSION) \
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$(OBJDIR)/libbpf.so.$(LIBBPF_VERSION)
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VERSION_SCRIPT := libbpf.map
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endif
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HEADERS := bpf.h libbpf.h btf.h xsk.h libbpf_util.h \
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bpf_helpers.h bpf_helper_defs.h bpf_tracing.h \
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bpf_endian.h bpf_core_read.h libbpf_common.h
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UAPI_HEADERS := $(addprefix $(TOPDIR)/include/uapi/linux/,\
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bpf.h bpf_common.h btf.h)
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PC_FILE := $(OBJDIR)/libbpf.pc
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INSTALL = install
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DESTDIR ?=
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ifeq ($(shell uname -m),x86_64)
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LIBSUBDIR := lib64
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else
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LIBSUBDIR := lib
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endif
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PREFIX ?= /usr
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LIBDIR ?= $(PREFIX)/$(LIBSUBDIR)
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INCLUDEDIR ?= $(PREFIX)/include
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UAPIDIR ?= $(PREFIX)/include
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TAGS_PROG := $(if $(shell which etags 2>/dev/null),etags,ctags)
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all: $(STATIC_LIBS) $(SHARED_LIBS) $(PC_FILE)
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$(OBJDIR)/libbpf.a: $(STATIC_OBJS)
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$(AR) rcs $@ $^
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$(OBJDIR)/libbpf.so: $(OBJDIR)/libbpf.so.$(LIBBPF_MAJOR_VERSION)
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ln -sf $(^F) $@
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$(OBJDIR)/libbpf.so.$(LIBBPF_MAJOR_VERSION): $(OBJDIR)/libbpf.so.$(LIBBPF_VERSION)
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ln -sf $(^F) $@
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$(OBJDIR)/libbpf.so.$(LIBBPF_VERSION): $(SHARED_OBJS)
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$(CC) -shared -Wl,--version-script=$(VERSION_SCRIPT) \
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-Wl,-soname,libbpf.so.$(LIBBPF_MAJOR_VERSION) \
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$^ $(ALL_LDFLAGS) -o $@
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$(OBJDIR)/libbpf.pc:
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sed -e "s|@PREFIX@|$(PREFIX)|" \
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-e "s|@LIBDIR@|$(LIBDIR)|" \
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-e "s|@VERSION@|$(LIBBPF_VERSION)|" \
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< libbpf.pc.template > $@
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$(STATIC_OBJDIR):
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mkdir -p $(STATIC_OBJDIR)
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$(SHARED_OBJDIR):
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mkdir -p $(SHARED_OBJDIR)
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$(STATIC_OBJDIR)/%.o: %.c | $(STATIC_OBJDIR)
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$(CC) $(ALL_CFLAGS) $(CPPFLAGS) -c $< -o $@
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$(SHARED_OBJDIR)/%.o: %.c | $(SHARED_OBJDIR)
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$(CC) $(ALL_CFLAGS) $(SHARED_CFLAGS) $(CPPFLAGS) -c $< -o $@
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define do_install
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if [ ! -d '$(DESTDIR)$2' ]; then \
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$(INSTALL) -d -m 755 '$(DESTDIR)$2'; \
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fi; \
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$(INSTALL) $1 $(if $3,-m $3,) '$(DESTDIR)$2'
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endef
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# Preserve symlinks at installation.
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define do_s_install
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if [ ! -d '$(DESTDIR)$2' ]; then \
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$(INSTALL) -d -m 755 '$(DESTDIR)$2'; \
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fi; \
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cp -fpR $1 '$(DESTDIR)$2'
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endef
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install: all install_headers install_pkgconfig
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$(call do_s_install,$(STATIC_LIBS) $(SHARED_LIBS),$(LIBDIR))
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install_headers:
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$(call do_install,$(HEADERS),$(INCLUDEDIR)/bpf,644)
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# UAPI headers can be installed by a different package so they're not installed
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# in by install rule.
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install_uapi_headers:
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$(call do_install,$(UAPI_HEADERS),$(UAPIDIR)/linux,644)
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install_pkgconfig: $(PC_FILE)
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$(call do_install,$(PC_FILE),$(LIBDIR)/pkgconfig,644)
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clean:
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rm -rf *.o *.a *.so *.so.* *.pc $(SHARED_OBJDIR) $(STATIC_OBJDIR)
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.PHONY: cscope tags
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cscope:
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ls *.c *.h > cscope.files
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cscope -b -q -f cscope.out
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tags:
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rm -f TAGS tags
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ls *.c *.h | xargs $(TAGS_PROG) -a
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