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Groups > linux.kernel > #1705498
| From | Joel Fernandes <joelaf@google.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH RFC 2/5] samples/bpf: Enable cross compiler support |
| Date | 2017-08-07 15:10 +0200 |
| Message-ID | <ubPXe-bV-67@gated-at.bofh.it> (permalink) |
| References | <ubPXc-bV-9@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
When cross compiling, bpf samples use HOSTCC, however what we really want is to use the cross compiler to build for the cross target since that is what will help run the BPF target code. Detect this and also set -static as LDFLAGS since often times we don't have control over what C library the cross target is running and its not smart to rely on it. Signed-off-by: Joel Fernandes <joelaf@google.com> --- samples/bpf/Makefile | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile index 6c7468eb3684..e5642c8c144d 100644 --- a/samples/bpf/Makefile +++ b/samples/bpf/Makefile @@ -152,6 +152,12 @@ HOSTLOADLIBES_test_map_in_map += -lelf LLC ?= llc CLANG ?= clang +# Detect that we're cross compiling and use the right compilers and flags +ifdef CROSS_COMPILE +HOSTCC = $(CROSS_COMPILE)gcc +HOSTLDFLAGS += -static +endif + # Trick to allow make to be run from this directory all: $(MAKE) -C ../../ $(CURDIR)/ -- 2.14.0.rc1.383.gd1ce394fe2-goog
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[PATCH RFC 0/5] add arm64 cross compilation support to BPF samples Joel Fernandes <joelaf@google.com> - 2017-08-07 15:10 +0200 [PATCH RFC 1/5] samples/bpf: Use getppid instead of getpgrp for array map stress Joel Fernandes <joelaf@google.com> - 2017-08-07 15:10 +0200 [PATCH RFC 2/5] samples/bpf: Enable cross compiler support Joel Fernandes <joelaf@google.com> - 2017-08-07 15:10 +0200
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