Several Makefiles use 'hostprogs' for building the code for the host architecture is not appropriate. This is just because Kbuild does not provide the syntax to do it. This series introduce 'userprogs' syntax and use it from sample and bpf Makefiles. Sam worked on this in 2014. https://lkml.org/lkml/2014/7/13/154 He used 'uapiprogs-y' but I just thought the meaning of "UAPI programs" is unclear. Naming is one the most difficult parts of this. I chose 'userprogs'. Anothor choice I had in my mind was 'targetprogs'. If you can test this series quickly by 'make allmodconfig samples/' When building objects for userspace, [U] is displayed. masahiro@oscar:~/workspace/linux$ make allmodconfig samples/ [snip] AR samples/vfio-mdev/built-in.a CC [M] samples/vfio-mdev/mtty.o CC [M] samples/vfio-mdev/mdpy.o CC [M] samples/vfio-mdev/mdpy-fb.o CC [M] samples/vfio-mdev/mbochs.o AR samples/mei/built-in.a CC [U] samples/mei/mei-amt-version CC [U] samples/auxdisplay/cfag12864b-example CC [M] samples/configfs/configfs_sample.o CC [M] samples/connector/cn_test.o CC [U] samples/connector/ucon CC [M] samples/ftrace/ftrace-direct.o CC [M] samples/ftrace/ftrace-direct-too.o CC [M] samples/ftrace/ftrace-direct-modify.o CC [M] samples/ftrace/sample-trace-array.o CC [U] samples/hidraw/hid-example CC [M] samples/hw_breakpoint/data_breakpoint.o CC [M] samples/kdb/kdb_hello.o CC [M] samples/kfifo/bytestream-example.o CC [M] samples/kfifo/dma-example.o CC [M] samples/kfifo/inttype-example.o CC [M] samples/kfifo/record-example.o CC [M] samples/kobject/kobject-example.o CC [M] samples/kobject/kset-example.o CC [M] samples/kprobes/kprobe_example.o CC [M] samples/kprobes/kretprobe_example.o CC [M] samples/livepatch/livepatch-sample.o CC [M] samples/livepatch/livepatch-shadow-mod.o CC [M] samples/livepatch/livepatch-shadow-fix1.o CC [M] samples/livepatch/livepatch-shadow-fix2.o CC [M] samples/livepatch/livepatch-callbacks-demo.o CC [M] samples/livepatch/livepatch-callbacks-mod.o CC [M] samples/livepatch/livepatch-callbacks-busymod.o CC [M] samples/rpmsg/rpmsg_client_sample.o CC [U] samples/seccomp/bpf-fancy.o CC [U] samples/seccomp/bpf-helper.o LD [U] samples/seccomp/bpf-fancy CC [U] samples/seccomp/dropper CC [U] samples/seccomp/bpf-direct CC [U] samples/seccomp/user-trap CC [U] samples/timers/hpet_example CC [M] samples/trace_events/trace-events-sample.o CC [M] samples/trace_printk/trace-printk.o CC [U] samples/uhid/uhid-example CC [M] samples/v4l/v4l2-pci-skeleton.o CC [U] samples/vfs/test-fsmount CC [U] samples/vfs/test-statx samples/vfs/test-statx.c:24:15: warning: ‘struct foo’ declared inside parameter list will not be visible outside of this definition or declaration 24 | #define statx foo | ^~~ CC [U] samples/watchdog/watchdog-simple AR samples/built-in.a Masahiro Yamada (15): Documentation: kbuild: fix the section title format Revert "objtool: Skip samples subdirectory" kbuild: add infrastructure to build userspace programs net: bpfilter: use 'userprogs' syntax to build bpfilter_umh samples: seccomp: build sample programs for target architecture kbuild: doc: document the new syntax 'userprogs' samples: uhid: build sample program for target architecture samples: hidraw: build sample program for target architecture samples: connector: build sample program for target architecture samples: vfs: build sample programs for target architecture samples: pidfd: build sample program for target architecture samples: mei: build sample program for target architecture samples: auxdisplay: use 'userprogs' syntax samples: timers: use 'userprogs' syntax samples: watchdog: use 'userprogs' syntax Sam Ravnborg (1): samples: uhid: fix warnings in uhid-example Documentation/kbuild/makefiles.rst | 185 +++++++++++++++++++++-------- Makefile | 11 +- net/bpfilter/Makefile | 11 +- samples/Kconfig | 26 +++- samples/Makefile | 5 +- samples/auxdisplay/Makefile | 11 +- samples/connector/Makefile | 12 +- samples/hidraw/Makefile | 9 +- samples/mei/Makefile | 9 +- samples/pidfd/Makefile | 8 +- samples/seccomp/Makefile | 42 +------ samples/timers/Makefile | 17 +-- samples/uhid/.gitignore | 2 + samples/uhid/Makefile | 9 +- samples/uhid/uhid-example.c | 4 +- samples/vfs/Makefile | 11 +- samples/watchdog/Makefile | 10 +- scripts/Makefile.build | 5 + scripts/Makefile.clean | 2 +- scripts/Makefile.userprogs | 44 +++++++ 20 files changed, 258 insertions(+), 175 deletions(-) create mode 100644 samples/uhid/.gitignore create mode 100644 scripts/Makefile.userprogs -- 2.25.1
