How can I successfully build it on an older version of Linux, such as CentOS 7

[gpt8763]

In the document says that the feature of bpftime,"In this mode, bpftime can run eBPF programs in userspace without kernel, so it can be ported into low version of Linux "

"I would like to build bpftime on CentOS 7（kernel is 3.10.0-1160.el7.x86_64）; however, I encountered an issue as the documentation specifies that it can only be built on Ubuntu Ubuntu 23.04. How can I successfully build it on an older version of Linux, such as CentOS 7?

[root@centos7 bpftime]# tail -f /home/ubuntu/bpftime/build/CMakeFiles/CMakeError.log
/usr/bin/cc -fno-omit-frame-pointer -DCHECK_FUNCTION_EXISTS=pthread_create CMakeFiles/cmTC_d6624.dir/CheckFunctionExists.c.o -o cmTC_d6624 -lpthreads
/usr/bin/ld: cannot find -lpthreads
collect2: error: ld returned 1 exit status
gmake[2]: *** [cmTC_d6624] Error 1
gmake[2]: Leaving directory /home/ubuntu/bpftime/build/CMakeFiles/CMakeTmp' gmake[1]: *** [cmTC_d6624/fast] Error 2 gmake[1]: Leaving directory /home/ubuntu/bpftime/build/CMakeFiles/CMakeTmp'

[root@centos7 bpftime]# gcc --version
gcc (GCC) 11.2.1 20220127 (Red Hat 11.2.1-9)

[Officeyutong]

Does your system have glibc-devel installed?

See https://stackoverflow.com/questions/69731318/could-not-locate-usable-posix-threads-in-centos-7

[gpt8763]

Package glibc-devel-2.17-326.el7_9.3.x86_64 already installed and latest version
Nothing to do

[gpt8763]

[ 80%] Linking CXX shared library libbpftime-agent-transformer.so
[ 80%] Built target bpftime_text_segment_transformer
[ 80%] Building CXX object runtime/CMakeFiles/runtime.dir/src/attach/bpf_attach_ctx.cpp.o
In file included from /home/ubuntu/bpftime/runtime/src/attach/bpf_attach_ctx.cpp:8:
/home/ubuntu/bpftime/runtime/../runtime/include/bpftime_shm.hpp:224:17: error: ‘__u32’ does not name a type
224 | __u32 prog_fd; /* eBPF program to attach /
| ^~~~~
/home/ubuntu/bpftime/runtime/../runtime/include/bpftime_shm.hpp:225:17: error: ‘__u32’ does not name a type
225 | __u32 map_fd; / struct_ops to attach /
| ^~~~~
/home/ubuntu/bpftime/runtime/../runtime/include/bpftime_shm.hpp:228:17: error: ‘__u32’ does not name a type
228 | __u32 target_fd; / object to attach to /
| ^~~~~
/home/ubuntu/bpftime/runtime/../runtime/include/bpftime_shm.hpp:229:17: error: ‘__u32’ does not name a type
229 | __u32 target_ifindex; / target ifindex /
| ^~~~~
/home/ubuntu/bpftime/runtime/../runtime/include/bpftime_shm.hpp:231:9: error: ‘__u32’ does not name a type
231 | __u32 attach_type; / attach type /
| ^~~~~
/home/ubuntu/bpftime/runtime/../runtime/include/bpftime_shm.hpp:232:9: error: ‘__u32’ does not name a type
232 | __u32 flags; / extra flags /
| ^~~~~
/home/ubuntu/bpftime/runtime/../runtime/include/bpftime_shm.hpp:234:17: error: ‘__u32’ does not name a type
234 | __u32 target_btf_id; / btf_id of target to attach to /
| ^~~~~
/home/ubuntu/bpftime/runtime/../runtime/include/bpftime_shm.hpp:236:25: error: ‘__aligned_u64’ does not name a type
236 | __aligned_u64 iter_info; / extra bpf_iter_link_info /
| ^~~~~~~~~~~~~
/home/ubuntu/bpftime/runtime/../runtime/include/bpftime_shm.hpp:237:25: error: ‘__u32’ does not name a type
237 | __u32 iter_info_len; / iter_info length */
| ^~~~~
/home/ubuntu/bpftime/runtime/../runtime/include/bpftime_shm.hpp:244:25: error: ‘__u64’ does not name a type
244 | __u64 bpf_cookie;
| ^~~~~
/home/ubuntu/bpftime/runtime/../runtime/include/bpftime_shm.hpp:247:25: error: ‘__u32’ does not name a type
247 | __u32 flags;
| ^~~~~
/home/ubuntu/bpftime/runtime/../runtime/include/bpftime_shm.hpp:248:25: error: ‘__u32’ does not name a type
248 | __u32 cnt;
| ^~~~~
/home/ubuntu/bpftime/runtime/../runtime/include/bpftime_shm.hpp:249:25: error: ‘__aligned_u64’ does not name a type
249 | __aligned_u64 syms;
| ^~~~~~~~~~~~~
/home/ubuntu/bpftime/runtime/../runtime/include/bpftime_shm.hpp:250:25: error: ‘__aligned_u64’ does not name a type
250 | __aligned_u64 addrs;
| ^~~~~~~~~~~~~
/home/ubuntu/bpftime/runtime/../runtime/include/bpftime_shm.hpp:251:25: error: ‘__aligned_u64’ does not name a type
251 | __aligned_u64 cookies;
| ^~~~~~~~~~~~~
/home/ubuntu/bpftime/runtime/../runtime/include/bpftime_shm.hpp:255:25: error: ‘__u32’ does not name a type
255 | __u32 target_btf_id;
| ^~~~~
/home/ubuntu/bpftime/runtime/../runtime/include/bpftime_shm.hpp:260:25: error: ‘__u64’ does not name a type
260 | __u64 cookie;
| ^~~~~
/home/ubuntu/bpftime/runtime/../runtime/include/bpftime_shm.hpp:263:25: error: ‘__u32’ does not name a type
263 | __u32 pf;
| ^~~~~
/home/ubuntu/bpftime/runtime/../runtime/include/bpftime_shm.hpp:264:25: error: ‘__u32’ does not name a type
264 | __u32 hooknum;
| ^~~~~
/home/ubuntu/bpftime/runtime/../runtime/include/bpftime_shm.hpp:265:25: error: ‘__s32’ does not name a type
265 | __s32 priority;
| ^~~~~
/home/ubuntu/bpftime/runtime/../runtime/include/bpftime_shm.hpp:266:25: error: ‘__u32’ does not name a type
266 | __u32 flags;
| ^~~~~
In file included from /home/ubuntu/bpftime/runtime/src/attach/bpf_attach_ctx.cpp:9:
/home/ubuntu/bpftime/runtime/src/handler/link_handler.hpp: In constructor ‘bpftime::bpf_link_handler::bpf_link_handler(bpf_link_create_args)’:
/home/ubuntu/bpftime/runtime/src/handler/link_handler.hpp:22:44: error: ‘struct bpf_link_create_args’ has no member named ‘prog_fd’
22 | : args(args), prog_id(args.prog_fd),
| ^~~~~~~
/home/ubuntu/bpftime/runtime/src/handler/link_handler.hpp:23:41: error: ‘struct bpf_link_create_args’ has no member named ‘target_fd’
23 | attach_target_id(args.target_fd)
| ^~~~~~~~~
In file included from /home/ubuntu/bpftime/runtime/src/handler/handler_manager.hpp:30,
from /home/ubuntu/bpftime/runtime/src/bpftime_shm_internal.hpp:15,
from /home/ubuntu/bpftime/runtime/src/attach/bpf_attach_ctx.cpp:19:
/home/ubuntu/bpftime/runtime/src/handler/map_handler.hpp: At global scope:
/home/ubuntu/bpftime/runtime/src/handler/map_handler.hpp:203:43: warning: ‘maybe_unused’ attribute ignored [-Wattributes]
203 | [[maybe_unused]] uint64_t flags = 0;
| ^
gmake[2]: *** [runtime/CMakeFiles/runtime.dir/build.make:79: runtime/CMakeFiles/runtime.dir/src/attach/bpf_attach_ctx.cpp.o] Error 1
gmake[1]: *** [CMakeFiles/Makefile2:1216: runtime/CMakeFiles/runtime.dir/all] Error 2
gmake: *** [Makefile:156: all] Error 2

[TheAhmad]

Hi @gpt8763,

I have successfully built bfptime on Ubuntu 18.04 and documented the steps here. Hope it helps!

Regards.

[Officeyutong]

[ 80%] Linking CXX shared library libbpftime-agent-transformer.so [ 80%] Built target bpftime_text_segment_transformer [ 80%] Building CXX object runtime/CMakeFiles/runtime.dir/src/attach/bpf_attach_ctx.cpp.o In file included from /home/ubuntu/bpftime/runtime/src/attach/bpf_attach_ctx.cpp:8: /home/ubuntu/bpftime/runtime/../runtime/include/bpftime_shm.hpp:224:17: error: ‘__u32’ does not name a type 224 | __u32 prog_fd; /* eBPF program to attach _/ | ^~~~~ /home/ubuntu/bpftime/runtime/../runtime/include/bpftime_shm.hpp:225:17: error: ‘__u32’ does not name a type 225 | _u32 map_fd; / struct_ops to attach _/ | ^~~~~ /home/ubuntu/bpftime/runtime/../runtime/include/bpftime_shm.hpp:228:17: error: ‘__u32’ does not name a type 228 | _u32 target_fd; / object to attach to _/ | ^~~~~ /home/ubuntu/bpftime/runtime/../runtime/include/bpftime_shm.hpp:229:17: error: ‘__u32’ does not name a type 229 | _u32 target_ifindex; / target ifindex _/ | ^~~~~ /home/ubuntu/bpftime/runtime/../runtime/include/bpftime_shm.hpp:231:9: error: ‘__u32’ does not name a type 231 | _u32 attach_type; / attach type _/ | ^~~~~ /home/ubuntu/bpftime/runtime/../runtime/include/bpftime_shm.hpp:232:9: error: ‘__u32’ does not name a type 232 | _u32 flags; / extra flags _/ | ^~~~~ /home/ubuntu/bpftime/runtime/../runtime/include/bpftime_shm.hpp:234:17: error: ‘__u32’ does not name a type 234 | _u32 target_btf_id; / btf_id of target to attach to _/ | ^~~~~ /home/ubuntu/bpftime/runtime/../runtime/include/bpftime_shm.hpp:236:25: error: ‘__aligned_u64’ does not name a type 236 | _aligned_u64 iter_info; / extra bpf_iter_link_info _/ | ^~~~~~~~~~~~~ /home/ubuntu/bpftime/runtime/../runtime/include/bpftime_shm.hpp:237:25: error: ‘__u32’ does not name a type 237 | _u32 iter_info_len; / iter_info length */ | ^~~~~ /home/ubuntu/bpftime/runtime/../runtime/include/bpftime_shm.hpp:244:25: error: ‘__u64’ does not name a type 244 | __u64 bpf_cookie; | ^~~~~ /home/ubuntu/bpftime/runtime/../runtime/include/bpftime_shm.hpp:247:25: error: ‘__u32’ does not name a type 247 | __u32 flags; | ^~~~~ /home/ubuntu/bpftime/runtime/../runtime/include/bpftime_shm.hpp:248:25: error: ‘__u32’ does not name a type 248 | __u32 cnt; | ^~~~~ /home/ubuntu/bpftime/runtime/../runtime/include/bpftime_shm.hpp:249:25: error: ‘__aligned_u64’ does not name a type 249 | __aligned_u64 syms; | ^~~~~~~~~~~~~ /home/ubuntu/bpftime/runtime/../runtime/include/bpftime_shm.hpp:250:25: error: ‘__aligned_u64’ does not name a type 250 | __aligned_u64 addrs; | ^~~~~~~~~~~~~ /home/ubuntu/bpftime/runtime/../runtime/include/bpftime_shm.hpp:251:25: error: ‘__aligned_u64’ does not name a type 251 | __aligned_u64 cookies; | ^~~~~~~~~~~~~ /home/ubuntu/bpftime/runtime/../runtime/include/bpftime_shm.hpp:255:25: error: ‘__u32’ does not name a type 255 | __u32 target_btf_id; | ^~~~~ /home/ubuntu/bpftime/runtime/../runtime/include/bpftime_shm.hpp:260:25: error: ‘__u64’ does not name a type 260 | __u64 cookie; | ^~~~~ /home/ubuntu/bpftime/runtime/../runtime/include/bpftime_shm.hpp:263:25: error: ‘__u32’ does not name a type 263 | __u32 pf; | ^~~~~ /home/ubuntu/bpftime/runtime/../runtime/include/bpftime_shm.hpp:264:25: error: ‘__u32’ does not name a type 264 | __u32 hooknum; | ^~~~~ /home/ubuntu/bpftime/runtime/../runtime/include/bpftime_shm.hpp:265:25: error: ‘__s32’ does not name a type 265 | __s32 priority; | ^~~~~ /home/ubuntu/bpftime/runtime/../runtime/include/bpftime_shm.hpp:266:25: error: ‘__u32’ does not name a type 266 | __u32 flags; | ^~~~~ In file included from /home/ubuntu/bpftime/runtime/src/attach/bpf_attach_ctx.cpp:9: /home/ubuntu/bpftime/runtime/src/handler/link_handler.hpp: In constructor ‘bpftime::bpf_link_handler::bpf_link_handler(bpf_link_create_args)’: /home/ubuntu/bpftime/runtime/src/handler/link_handler.hpp:22:44: error: ‘struct bpf_link_create_args’ has no member named ‘prog_fd’ 22 | : args(args), prog_id(args.prog_fd), | ^~~~~~~ /home/ubuntu/bpftime/runtime/src/handler/link_handler.hpp:23:41: error: ‘struct bpf_link_create_args’ has no member named ‘target_fd’ 23 | attach_target_id(args.target_fd) | ^~~~~~~~~ In file included from /home/ubuntu/bpftime/runtime/src/handler/handler_manager.hpp:30, from /home/ubuntu/bpftime/runtime/src/bpftime_shm_internal.hpp:15, from /home/ubuntu/bpftime/runtime/src/attach/bpf_attach_ctx.cpp:19: /home/ubuntu/bpftime/runtime/src/handler/map_handler.hpp: At global scope: /home/ubuntu/bpftime/runtime/src/handler/map_handler.hpp:203:43: warning: ‘maybe_unused’ attribute ignored [-Wattributes] 203 | [[maybe_unused]] uint64_t flags = 0; | ^ gmake[2]: *** [runtime/CMakeFiles/runtime.dir/build.make:79: runtime/CMakeFiles/runtime.dir/src/attach/bpf_attach_ctx.cpp.o] Error 1 gmake[1]: *** [CMakeFiles/Makefile2:1216: runtime/CMakeFiles/runtime.dir/all] Error 2 gmake: *** [Makefile:156: all] Error 2

Try replacing __u32 to uint32_t, __u64 to uint64_t, etc