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| author | Viktor Malik <vmalik@redhat.com> | 2023-10-25 08:19:12 +0200 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2023-10-26 15:32:12 +0200 |
| commit | 870f09f1ba3014e2c157b14299c172b4bb716638 (patch) | |
| tree | eccba13e343802ae0bef8d186d918062e1634396 /samples | |
| parent | c421c12586b3f00fb96b5c9af15c9a051a9090b1 (diff) | |
| download | linux-stable-870f09f1ba3014e2c157b14299c172b4bb716638.tar.gz linux-stable-870f09f1ba3014e2c157b14299c172b4bb716638.tar.bz2 linux-stable-870f09f1ba3014e2c157b14299c172b4bb716638.zip | |
samples/bpf: Allow building with custom CFLAGS/LDFLAGS
Currently, it is not possible to specify custom flags when building
samples/bpf. The flags are defined in TPROGS_CFLAGS/TPROGS_LDFLAGS
variables, however, when trying to override those from the make command,
compilation fails.
For example, when trying to build with PIE:
$ make -C samples/bpf TPROGS_CFLAGS="-fpie" TPROGS_LDFLAGS="-pie"
This is because samples/bpf/Makefile updates these variables, especially
appends include paths to TPROGS_CFLAGS and these updates are overridden
by setting the variables from the make command.
This patch introduces variables TPROGS_USER_CFLAGS/TPROGS_USER_LDFLAGS
for this purpose, which can be set from the make command and their
values are propagated to TPROGS_CFLAGS/TPROGS_LDFLAGS.
Signed-off-by: Viktor Malik <vmalik@redhat.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/2d81100b830a71f0e72329cc7781edaefab75f62.1698213811.git.vmalik@redhat.com
Diffstat (limited to 'samples')
| -rw-r--r-- | samples/bpf/Makefile | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile index 90af76fa9dd8..5a9805edec93 100644 --- a/samples/bpf/Makefile +++ b/samples/bpf/Makefile @@ -150,6 +150,9 @@ always-y += ibumad_kern.o always-y += hbm_out_kern.o always-y += hbm_edt_kern.o +TPROGS_CFLAGS = $(TPROGS_USER_CFLAGS) +TPROGS_LDFLAGS = $(TPROGS_USER_LDFLAGS) + ifeq ($(ARCH), arm) # Strip all except -D__LINUX_ARM_ARCH__ option needed to handle linux # headers when arm instruction set identification is requested. @@ -316,7 +319,7 @@ XDP_SAMPLE_CFLAGS += -Wall -O2 \ -I$(LIBBPF_INCLUDE) \ -I$(src)/../../tools/testing/selftests/bpf -$(obj)/$(XDP_SAMPLE): TPROGS_CFLAGS = $(XDP_SAMPLE_CFLAGS) +$(obj)/$(XDP_SAMPLE): TPROGS_CFLAGS = $(XDP_SAMPLE_CFLAGS) $(TPROGS_USER_CFLAGS) $(obj)/$(XDP_SAMPLE): $(src)/xdp_sample_user.h $(src)/xdp_sample_shared.h # Override includes for trace_helpers.o because __must_check won't be defined # in our include path. |