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dwarves: Add -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 to build libbpf 

We need that as the fix in upstream libbpf is in the
tools/lib/bpf/Makefile, that isn't used when building libbpf as part of
pahole, see:

  "Makefile: back-port _FILE_OFFSET_BITS=64 and _LARGEFILE64_SOURCE to Makefile"
  4a50ceb043

That refers to this in the kernel sources:

  71dd77fd4bf7 ("libbpf: use LFS (_FILE_OFFSET_BITS) instead of direct mmap2 syscall")

Cc: Andrii Nakryiko <andrii.nakryiko@gmail.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Julia Kartseva <hex@fb.com>
Cc: Yonghong Song <yhs@fb.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Andrii Nakryiko 2020-02-03 08:52:26 +01:00 committed by Arnaldo Carvalho de Melo
parent e8f43a4963
commit 081f3618a7
1 changed files with 2 additions and 0 deletions
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2
CMakeLists.txt
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@ -74,6 +74,8 @@ if (NOT HAVE_REALLOCARRAY_SUPPORT)
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -DCOMPAT_NEED_REALLOCARRAY")
endif()
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64")
file(GLOB libbpf_sources "lib/bpf/src/*.c")
add_library(bpf OBJECT ${libbpf_sources})
set_property(TARGET bpf PROPERTY POSITION_INDEPENDENT_CODE 1)