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bpf: Replace deprecated -target with --target= for Clang 

The -target option has been deprecated since clang 3.4 in 2013. Therefore, use
the preferred --target=bpf form instead. This also matches how we use --target=
in scripts/Makefile.clang.

Signed-off-by: Fangrui Song <maskray@google.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Yonghong Song <yhs@fb.com>
Acked-by: Quentin Monnet <quentin@isovalent.com>
Link: 274b6f0c87
Link: https://lore.kernel.org/bpf/20230624001856.1903733-1-maskray@google.com
This commit is contained in:
Fangrui Song 2023-06-24 00:18:56 +00:00 committed by Daniel Borkmann
parent da1a055d01
commit bbaf1ff06a
18 changed files with 35 additions and 35 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
Documentation/bpf/bpf_devel_QA.rst
View File

@ -635,12 +635,12 @@ test coverage.
Q: clang flag for target bpf? Q: clang flag for target bpf?
----------------------------- -----------------------------
Q: In some cases clang flag ``-target bpf`` is used but in other cases the Q: In some cases clang flag ``--target=bpf`` is used but in other cases the
default clang target, which matches the underlying architecture, is used. default clang target, which matches the underlying architecture, is used.
What is the difference and when I should use which? What is the difference and when I should use which?
A: Although LLVM IR generation and optimization try to stay architecture A: Although LLVM IR generation and optimization try to stay architecture
independent, ``-target <arch>`` still has some impact on generated code: independent, ``--target=<arch>`` still has some impact on generated code:
- BPF program may recursively include header file(s) with file scope - BPF program may recursively include header file(s) with file scope
inline assembly codes. The default target can handle this well, inline assembly codes. The default target can handle this well,
@ -658,7 +658,7 @@ independent, ``-target <arch>`` still has some impact on generated code:
The clang option ``-fno-jump-tables`` can be used to disable The clang option ``-fno-jump-tables`` can be used to disable
switch table generation. switch table generation.
- For clang ``-target bpf``, it is guaranteed that pointer or long / - For clang ``--target=bpf``, it is guaranteed that pointer or long /
unsigned long types will always have a width of 64 bit, no matter unsigned long types will always have a width of 64 bit, no matter
whether underlying clang binary or default target (or kernel) is whether underlying clang binary or default target (or kernel) is
32 bit. However, when native clang target is used, then it will 32 bit. However, when native clang target is used, then it will
@ -668,7 +668,7 @@ independent, ``-target <arch>`` still has some impact on generated code:
while the BPF LLVM back end still operates in 64 bit. The native while the BPF LLVM back end still operates in 64 bit. The native
target is mostly needed in tracing for the case of walking ``pt_regs`` target is mostly needed in tracing for the case of walking ``pt_regs``
or other kernel structures where CPU's register width matters. or other kernel structures where CPU's register width matters.
Otherwise, ``clang -target bpf`` is generally recommended. Otherwise, ``clang --target=bpf`` is generally recommended.
You should use default target when: You should use default target when:
@ -685,7 +685,7 @@ when:
into these structures is verified by the BPF verifier and may result into these structures is verified by the BPF verifier and may result
in verification failures if the native architecture is not aligned with in verification failures if the native architecture is not aligned with
the BPF architecture, e.g. 64-bit. An example of this is the BPF architecture, e.g. 64-bit. An example of this is
BPF_PROG_TYPE_SK_MSG require ``-target bpf`` BPF_PROG_TYPE_SK_MSG require ``--target=bpf``
.. Links .. Links

4
Documentation/bpf/btf.rst
View File

@ -990,7 +990,7 @@ format.::
} g2; } g2;
int main() { return 0; } int main() { return 0; }
int test() { return 0; } int test() { return 0; }
-bash-4.4$ clang -c -g -O2 -target bpf t2.c -bash-4.4$ clang -c -g -O2 --target=bpf t2.c
-bash-4.4$ readelf -S t2.o -bash-4.4$ readelf -S t2.o
...... ......
[ 8] .BTF PROGBITS 0000000000000000 00000247 [ 8] .BTF PROGBITS 0000000000000000 00000247
@ -1000,7 +1000,7 @@ format.::
[10] .rel.BTF.ext REL 0000000000000000 000007e0 [10] .rel.BTF.ext REL 0000000000000000 000007e0
0000000000000040 0000000000000010 16 9 8 0000000000000040 0000000000000010 16 9 8
...... ......
-bash-4.4$ clang -S -g -O2 -target bpf t2.c -bash-4.4$ clang -S -g -O2 --target=bpf t2.c
-bash-4.4$ cat t2.s -bash-4.4$ cat t2.s
...... ......
.section .BTF,"",@progbits .section .BTF,"",@progbits

6
Documentation/bpf/llvm_reloc.rst
View File

@ -28,7 +28,7 @@ For example, for the following code::
return g1 + g2 + l1 + l2; return g1 + g2 + l1 + l2;
} }
Compiled with ``clang -target bpf -O2 -c test.c``, the following is Compiled with ``clang --target=bpf -O2 -c test.c``, the following is
the code with ``llvm-objdump -dr test.o``:: the code with ``llvm-objdump -dr test.o``::
0: 18 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 r1 = 0 ll 0: 18 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 r1 = 0 ll
@ -157,7 +157,7 @@ and ``call`` instructions. For example::
return gfunc(a, b) + lfunc(a, b) + global; return gfunc(a, b) + lfunc(a, b) + global;
} }
Compiled with ``clang -target bpf -O2 -c test.c``, we will have Compiled with ``clang --target=bpf -O2 -c test.c``, we will have
following code with `llvm-objdump -dr test.o``:: following code with `llvm-objdump -dr test.o``::
Disassembly of section .text: Disassembly of section .text:
@ -203,7 +203,7 @@ The following is an example to show how R_BPF_64_ABS64 could be generated::
int global() { return 0; } int global() { return 0; }
struct t { void *g; } gbl = { global }; struct t { void *g; } gbl = { global };
Compiled with ``clang -target bpf -O2 -g -c test.c``, we will see a Compiled with ``clang --target=bpf -O2 -g -c test.c``, we will see a
relocation below in ``.data`` section with command relocation below in ``.data`` section with command
``llvm-readelf -r test.o``:: ``llvm-readelf -r test.o``::

2
drivers/hid/bpf/entrypoints/Makefile
View File

@ -58,7 +58,7 @@ entrypoints.lskel.h: $(OUTPUT)/entrypoints.bpf.o | $(BPFTOOL)
$(OUTPUT)/entrypoints.bpf.o: entrypoints.bpf.c $(OUTPUT)/vmlinux.h $(BPFOBJ) | $(OUTPUT) $(OUTPUT)/entrypoints.bpf.o: entrypoints.bpf.c $(OUTPUT)/vmlinux.h $(BPFOBJ) | $(OUTPUT)
$(call msg,BPF,$@) $(call msg,BPF,$@)
$(Q)$(CLANG) -g -O2 -target bpf $(INCLUDES) \ $(Q)$(CLANG) -g -O2 --target=bpf $(INCLUDES) \
-c $(filter %.c,$^) -o $@ && \ -c $(filter %.c,$^) -o $@ && \
$(LLVM_STRIP) -g $@ $(LLVM_STRIP) -g $@

2
kernel/bpf/preload/iterators/Makefile
View File

@ -50,7 +50,7 @@ iterators.lskel-%.h: $(OUTPUT)/%/iterators.bpf.o | $(BPFTOOL)
$(OUTPUT)/%/iterators.bpf.o: iterators.bpf.c $(BPFOBJ) | $(OUTPUT) $(OUTPUT)/%/iterators.bpf.o: iterators.bpf.c $(BPFOBJ) | $(OUTPUT)
$(call msg,BPF,$@) $(call msg,BPF,$@)
$(Q)mkdir -p $(@D) $(Q)mkdir -p $(@D)
$(Q)$(CLANG) -g -O2 -target bpf -m$* $(INCLUDES) \ $(Q)$(CLANG) -g -O2 --target=bpf -m$* $(INCLUDES) \
-c $(filter %.c,$^) -o $@ && \ -c $(filter %.c,$^) -o $@ && \
$(LLVM_STRIP) -g $@ $(LLVM_STRIP) -g $@

6
samples/bpf/Makefile
View File

@ -248,7 +248,7 @@ BTF_LLC_PROBE := $(shell $(LLC) -march=bpf -mattr=help 2>&1 | grep dwarfris)
BTF_PAHOLE_PROBE := $(shell $(BTF_PAHOLE) --help 2>&1 | grep BTF) BTF_PAHOLE_PROBE := $(shell $(BTF_PAHOLE) --help 2>&1 | grep BTF)
BTF_OBJCOPY_PROBE := $(shell $(LLVM_OBJCOPY) --help 2>&1 | grep -i 'usage.*llvm') BTF_OBJCOPY_PROBE := $(shell $(LLVM_OBJCOPY) --help 2>&1 | grep -i 'usage.*llvm')
BTF_LLVM_PROBE := $(shell echo "int main() { return 0; }" | \ BTF_LLVM_PROBE := $(shell echo "int main() { return 0; }" | \
$(CLANG) -target bpf -O2 -g -c -x c - -o ./llvm_btf_verify.o; \ $(CLANG) --target=bpf -O2 -g -c -x c - -o ./llvm_btf_verify.o; \
$(LLVM_READELF) -S ./llvm_btf_verify.o | grep BTF; \ $(LLVM_READELF) -S ./llvm_btf_verify.o | grep BTF; \
/bin/rm -f ./llvm_btf_verify.o) /bin/rm -f ./llvm_btf_verify.o)
@ -370,7 +370,7 @@ endif
clean-files += vmlinux.h clean-files += vmlinux.h
# Get Clang's default includes on this system, as opposed to those seen by # Get Clang's default includes on this system, as opposed to those seen by
# '-target bpf'. This fixes "missing" files on some architectures/distros, # '--target=bpf'. This fixes "missing" files on some architectures/distros,
# such as asm/byteorder.h, asm/socket.h, asm/sockios.h, sys/cdefs.h etc. # such as asm/byteorder.h, asm/socket.h, asm/sockios.h, sys/cdefs.h etc.
# #
# Use '-idirafter': Don't interfere with include mechanics except where the # Use '-idirafter': Don't interfere with include mechanics except where the
@ -392,7 +392,7 @@ $(obj)/xdp_router_ipv4.bpf.o: $(obj)/xdp_sample.bpf.o
$(obj)/%.bpf.o: $(src)/%.bpf.c $(obj)/vmlinux.h $(src)/xdp_sample.bpf.h $(src)/xdp_sample_shared.h $(obj)/%.bpf.o: $(src)/%.bpf.c $(obj)/vmlinux.h $(src)/xdp_sample.bpf.h $(src)/xdp_sample_shared.h
@echo " CLANG-BPF " $@ @echo " CLANG-BPF " $@
$(Q)$(CLANG) -g -O2 -target bpf -D__TARGET_ARCH_$(SRCARCH) \ $(Q)$(CLANG) -g -O2 --target=bpf -D__TARGET_ARCH_$(SRCARCH) \
-Wno-compare-distinct-pointer-types -I$(srctree)/include \ -Wno-compare-distinct-pointer-types -I$(srctree)/include \
-I$(srctree)/samples/bpf -I$(srctree)/tools/include \ -I$(srctree)/samples/bpf -I$(srctree)/tools/include \
-I$(LIBBPF_INCLUDE) $(CLANG_SYS_INCLUDES) \ -I$(LIBBPF_INCLUDE) $(CLANG_SYS_INCLUDES) \

2
samples/bpf/gnu/stubs.h
View File

@ -1 +1 @@
/* dummy .h to trick /usr/include/features.h to work with 'clang -target bpf' */ /* dummy .h to trick /usr/include/features.h to work with 'clang --target=bpf' */

2
samples/bpf/test_lwt_bpf.sh
View File

@ -376,7 +376,7 @@ DST_MAC=$(lookup_mac $VETH1 $NS1)
SRC_MAC=$(lookup_mac $VETH0) SRC_MAC=$(lookup_mac $VETH0)
DST_IFINDEX=$(cat /sys/class/net/$VETH0/ifindex) DST_IFINDEX=$(cat /sys/class/net/$VETH0/ifindex)
CLANG_OPTS="-O2 -target bpf -I ../include/" CLANG_OPTS="-O2 --target=bpf -I ../include/"
CLANG_OPTS+=" -DSRC_MAC=$SRC_MAC -DDST_MAC=$DST_MAC -DDST_IFINDEX=$DST_IFINDEX" CLANG_OPTS+=" -DSRC_MAC=$SRC_MAC -DDST_MAC=$DST_MAC -DDST_IFINDEX=$DST_IFINDEX"
clang $CLANG_OPTS -c $PROG_SRC -o $BPF_PROG clang $CLANG_OPTS -c $PROG_SRC -o $BPF_PROG

6
samples/hid/Makefile
View File

@ -86,7 +86,7 @@ BTF_LLC_PROBE := $(shell $(LLC) -march=bpf -mattr=help 2>&1 | grep dwarfris)
BTF_PAHOLE_PROBE := $(shell $(BTF_PAHOLE) --help 2>&1 | grep BTF) BTF_PAHOLE_PROBE := $(shell $(BTF_PAHOLE) --help 2>&1 | grep BTF)
BTF_OBJCOPY_PROBE := $(shell $(LLVM_OBJCOPY) --help 2>&1 | grep -i 'usage.*llvm') BTF_OBJCOPY_PROBE := $(shell $(LLVM_OBJCOPY) --help 2>&1 | grep -i 'usage.*llvm')
BTF_LLVM_PROBE := $(shell echo "int main() { return 0; }" | \ BTF_LLVM_PROBE := $(shell echo "int main() { return 0; }" | \
$(CLANG) -target bpf -O2 -g -c -x c - -o ./llvm_btf_verify.o; \ $(CLANG) --target=bpf -O2 -g -c -x c - -o ./llvm_btf_verify.o; \
$(LLVM_READELF) -S ./llvm_btf_verify.o | grep BTF; \ $(LLVM_READELF) -S ./llvm_btf_verify.o | grep BTF; \
/bin/rm -f ./llvm_btf_verify.o) /bin/rm -f ./llvm_btf_verify.o)
@ -181,7 +181,7 @@ endif
clean-files += vmlinux.h clean-files += vmlinux.h
# Get Clang's default includes on this system, as opposed to those seen by # Get Clang's default includes on this system, as opposed to those seen by
# '-target bpf'. This fixes "missing" files on some architectures/distros, # '--target=bpf'. This fixes "missing" files on some architectures/distros,
# such as asm/byteorder.h, asm/socket.h, asm/sockios.h, sys/cdefs.h etc. # such as asm/byteorder.h, asm/socket.h, asm/sockios.h, sys/cdefs.h etc.
# #
# Use '-idirafter': Don't interfere with include mechanics except where the # Use '-idirafter': Don't interfere with include mechanics except where the
@ -198,7 +198,7 @@ EXTRA_BPF_HEADERS_SRC := $(addprefix $(src)/,$(EXTRA_BPF_HEADERS))
$(obj)/%.bpf.o: $(src)/%.bpf.c $(EXTRA_BPF_HEADERS_SRC) $(obj)/vmlinux.h $(obj)/%.bpf.o: $(src)/%.bpf.c $(EXTRA_BPF_HEADERS_SRC) $(obj)/vmlinux.h
@echo " CLANG-BPF " $@ @echo " CLANG-BPF " $@
$(Q)$(CLANG) -g -O2 -target bpf -D__TARGET_ARCH_$(SRCARCH) \ $(Q)$(CLANG) -g -O2 --target=bpf -D__TARGET_ARCH_$(SRCARCH) \
-Wno-compare-distinct-pointer-types -I$(srctree)/include \ -Wno-compare-distinct-pointer-types -I$(srctree)/include \
-I$(srctree)/samples/bpf -I$(srctree)/tools/include \ -I$(srctree)/samples/bpf -I$(srctree)/tools/include \
-I$(LIBBPF_INCLUDE) $(CLANG_SYS_INCLUDES) \ -I$(LIBBPF_INCLUDE) $(CLANG_SYS_INCLUDES) \

4
tools/bpf/bpftool/Documentation/bpftool-gen.rst
View File

@ -260,9 +260,9 @@ EXAMPLES
This is example BPF application with two BPF programs and a mix of BPF maps This is example BPF application with two BPF programs and a mix of BPF maps
and global variables. Source code is split across two source code files. and global variables. Source code is split across two source code files.
**$ clang -target bpf -g example1.bpf.c -o example1.bpf.o** **$ clang --target=bpf -g example1.bpf.c -o example1.bpf.o**
**$ clang -target bpf -g example2.bpf.c -o example2.bpf.o** **$ clang --target=bpf -g example2.bpf.c -o example2.bpf.o**
**$ bpftool gen object example.bpf.o example1.bpf.o example2.bpf.o** **$ bpftool gen object example.bpf.o example1.bpf.o example2.bpf.o**

2
tools/bpf/bpftool/Makefile
View File

@ -216,7 +216,7 @@ $(OUTPUT)%.bpf.o: skeleton/%.bpf.c $(OUTPUT)vmlinux.h $(LIBBPF_BOOTSTRAP)
-I$(srctree)/tools/include/uapi/ \ -I$(srctree)/tools/include/uapi/ \
-I$(LIBBPF_BOOTSTRAP_INCLUDE) \ -I$(LIBBPF_BOOTSTRAP_INCLUDE) \
-g -O2 -Wall -fno-stack-protector \ -g -O2 -Wall -fno-stack-protector \
-target bpf -c $< -o $@ --target=bpf -c $< -o $@
$(Q)$(LLVM_STRIP) -g $@ $(Q)$(LLVM_STRIP) -g $@
$(OUTPUT)%.skel.h: $(OUTPUT)%.bpf.o $(BPFTOOL_BOOTSTRAP) $(OUTPUT)%.skel.h: $(OUTPUT)%.bpf.o $(BPFTOOL_BOOTSTRAP)

2
tools/bpf/runqslower/Makefile
View File

@ -62,7 +62,7 @@ $(OUTPUT)/%.skel.h: $(OUTPUT)/%.bpf.o | $(BPFTOOL)
$(QUIET_GEN)$(BPFTOOL) gen skeleton $< > $@ $(QUIET_GEN)$(BPFTOOL) gen skeleton $< > $@
$(OUTPUT)/%.bpf.o: %.bpf.c $(BPFOBJ) | $(OUTPUT) $(OUTPUT)/%.bpf.o: %.bpf.c $(BPFOBJ) | $(OUTPUT)
$(QUIET_GEN)$(CLANG) -g -O2 -target bpf $(INCLUDES) \ $(QUIET_GEN)$(CLANG) -g -O2 --target=bpf $(INCLUDES) \
-c $(filter %.c,$^) -o $@ && \ -c $(filter %.c,$^) -o $@ && \
$(LLVM_STRIP) -g $@ $(LLVM_STRIP) -g $@

2
tools/build/feature/Makefile
View File

@ -372,7 +372,7 @@ $(OUTPUT)test-libzstd.bin:
$(BUILD) -lzstd $(BUILD) -lzstd
$(OUTPUT)test-clang-bpf-co-re.bin: $(OUTPUT)test-clang-bpf-co-re.bin:
$(CLANG) -S -g -target bpf -o - $(patsubst %.bin,%.c,$(@F)) | \ $(CLANG) -S -g --target=bpf -o - $(patsubst %.bin,%.c,$(@F)) | \
grep BTF_KIND_VAR grep BTF_KIND_VAR
$(OUTPUT)test-file-handle.bin: $(OUTPUT)test-file-handle.bin:

6
tools/testing/selftests/bpf/Makefile
View File

@ -331,7 +331,7 @@ $(RESOLVE_BTFIDS): $(HOST_BPFOBJ) | $(HOST_BUILD_DIR)/resolve_btfids \
OUTPUT=$(HOST_BUILD_DIR)/resolve_btfids/ BPFOBJ=$(HOST_BPFOBJ) OUTPUT=$(HOST_BUILD_DIR)/resolve_btfids/ BPFOBJ=$(HOST_BPFOBJ)
# Get Clang's default includes on this system, as opposed to those seen by # Get Clang's default includes on this system, as opposed to those seen by
# '-target bpf'. This fixes "missing" files on some architectures/distros, # '--target=bpf'. This fixes "missing" files on some architectures/distros,
# such as asm/byteorder.h, asm/socket.h, asm/sockios.h, sys/cdefs.h etc. # such as asm/byteorder.h, asm/socket.h, asm/sockios.h, sys/cdefs.h etc.
# #
# Use '-idirafter': Don't interfere with include mechanics except where the # Use '-idirafter': Don't interfere with include mechanics except where the
@ -372,12 +372,12 @@ $(OUTPUT)/cgroup_getset_retval_hooks.o: cgroup_getset_retval_hooks.h
# $3 - CFLAGS # $3 - CFLAGS
define CLANG_BPF_BUILD_RULE define CLANG_BPF_BUILD_RULE
$(call msg,CLNG-BPF,$(TRUNNER_BINARY),$2) $(call msg,CLNG-BPF,$(TRUNNER_BINARY),$2)
$(Q)$(CLANG) $3 -O2 -target bpf -c $1 -mcpu=v3 -o $2 $(Q)$(CLANG) $3 -O2 --target=bpf -c $1 -mcpu=v3 -o $2
endef endef
# Similar to CLANG_BPF_BUILD_RULE, but with disabled alu32 # Similar to CLANG_BPF_BUILD_RULE, but with disabled alu32
define CLANG_NOALU32_BPF_BUILD_RULE define CLANG_NOALU32_BPF_BUILD_RULE
$(call msg,CLNG-BPF,$(TRUNNER_BINARY),$2) $(call msg,CLNG-BPF,$(TRUNNER_BINARY),$2)
$(Q)$(CLANG) $3 -O2 -target bpf -c $1 -mcpu=v2 -o $2 $(Q)$(CLANG) $3 -O2 --target=bpf -c $1 -mcpu=v2 -o $2
endef endef
# Build BPF object using GCC # Build BPF object using GCC
define GCC_BPF_BUILD_RULE define GCC_BPF_BUILD_RULE

2
tools/testing/selftests/bpf/gnu/stubs.h
View File

@ -1 +1 @@
/* dummy .h to trick /usr/include/features.h to work with 'clang -target bpf' */ /* dummy .h to trick /usr/include/features.h to work with 'clang --target=bpf' */

6
tools/testing/selftests/hid/Makefile
View File

@ -167,7 +167,7 @@ $(RESOLVE_BTFIDS): $(HOST_BPFOBJ) | $(HOST_BUILD_DIR)/resolve_btfids \
OUTPUT=$(HOST_BUILD_DIR)/resolve_btfids/ BPFOBJ=$(HOST_BPFOBJ) OUTPUT=$(HOST_BUILD_DIR)/resolve_btfids/ BPFOBJ=$(HOST_BPFOBJ)
# Get Clang's default includes on this system, as opposed to those seen by # Get Clang's default includes on this system, as opposed to those seen by
# '-target bpf'. This fixes "missing" files on some architectures/distros, # '--target=bpf'. This fixes "missing" files on some architectures/distros,
# such as asm/byteorder.h, asm/socket.h, asm/sockios.h, sys/cdefs.h etc. # such as asm/byteorder.h, asm/socket.h, asm/sockios.h, sys/cdefs.h etc.
# #
# Use '-idirafter': Don't interfere with include mechanics except where the # Use '-idirafter': Don't interfere with include mechanics except where the
@ -196,12 +196,12 @@ CLANG_CFLAGS = $(CLANG_SYS_INCLUDES) \
# $3 - CFLAGS # $3 - CFLAGS
define CLANG_BPF_BUILD_RULE define CLANG_BPF_BUILD_RULE
$(call msg,CLNG-BPF,$(TRUNNER_BINARY),$2) $(call msg,CLNG-BPF,$(TRUNNER_BINARY),$2)
$(Q)$(CLANG) $3 -O2 -target bpf -c $1 -mcpu=v3 -o $2 $(Q)$(CLANG) $3 -O2 --target=bpf -c $1 -mcpu=v3 -o $2
endef endef
# Similar to CLANG_BPF_BUILD_RULE, but with disabled alu32 # Similar to CLANG_BPF_BUILD_RULE, but with disabled alu32
define CLANG_NOALU32_BPF_BUILD_RULE define CLANG_NOALU32_BPF_BUILD_RULE
$(call msg,CLNG-BPF,$(TRUNNER_BINARY),$2) $(call msg,CLNG-BPF,$(TRUNNER_BINARY),$2)
$(Q)$(CLANG) $3 -O2 -target bpf -c $1 -mcpu=v2 -o $2 $(Q)$(CLANG) $3 -O2 --target=bpf -c $1 -mcpu=v2 -o $2
endef endef
# Build BPF object using GCC # Build BPF object using GCC
define GCC_BPF_BUILD_RULE define GCC_BPF_BUILD_RULE

4
tools/testing/selftests/net/Makefile
View File

@ -113,7 +113,7 @@ $(MAKE_DIRS):
mkdir -p $@ mkdir -p $@
# Get Clang's default includes on this system, as opposed to those seen by # Get Clang's default includes on this system, as opposed to those seen by
# '-target bpf'. This fixes "missing" files on some architectures/distros, # '--target=bpf'. This fixes "missing" files on some architectures/distros,
# such as asm/byteorder.h, asm/socket.h, asm/sockios.h, sys/cdefs.h etc. # such as asm/byteorder.h, asm/socket.h, asm/sockios.h, sys/cdefs.h etc.
# #
# Use '-idirafter': Don't interfere with include mechanics except where the # Use '-idirafter': Don't interfere with include mechanics except where the
@ -131,7 +131,7 @@ endif
CLANG_SYS_INCLUDES = $(call get_sys_includes,$(CLANG),$(CLANG_TARGET_ARCH)) CLANG_SYS_INCLUDES = $(call get_sys_includes,$(CLANG),$(CLANG_TARGET_ARCH))
$(OUTPUT)/nat6to4.o: nat6to4.c $(BPFOBJ) | $(MAKE_DIRS) $(OUTPUT)/nat6to4.o: nat6to4.c $(BPFOBJ) | $(MAKE_DIRS)
$(CLANG) -O2 -target bpf -c $< $(CCINCLUDE) $(CLANG_SYS_INCLUDES) -o $@ $(CLANG) -O2 --target=bpf -c $< $(CCINCLUDE) $(CLANG_SYS_INCLUDES) -o $@
$(BPFOBJ): $(wildcard $(BPFDIR)/*.[ch] $(BPFDIR)/Makefile) \ $(BPFOBJ): $(wildcard $(BPFDIR)/*.[ch] $(BPFDIR)/Makefile) \
$(APIDIR)/linux/bpf.h \ $(APIDIR)/linux/bpf.h \

2
tools/testing/selftests/tc-testing/Makefile
View File

@ -24,7 +24,7 @@ CLANG_FLAGS = -I. -I$(APIDIR) \
$(OUTPUT)/%.o: %.c $(OUTPUT)/%.o: %.c
$(CLANG) $(CLANG_FLAGS) \ $(CLANG) $(CLANG_FLAGS) \
-O2 -target bpf -emit-llvm -c $< -o - | \ -O2 --target=bpf -emit-llvm -c $< -o - | \
$(LLC) -march=bpf -mcpu=$(CPU) $(LLC_FLAGS) -filetype=obj -o $@ $(LLC) -march=bpf -mcpu=$(CPU) $(LLC_FLAGS) -filetype=obj -o $@
TEST_PROGS += ./tdc.sh TEST_PROGS += ./tdc.sh