Cannot use pkg-config to build a binary with libs #2004
Description
Describe the bug
Building a binary linked with libsinsp using pkg-config fails with multiple layers of errors. As of now, our pkg-config looks unusable.
How to reproduce it
- In the build directory:
rm -rf /tmp/libs ; make DESTDIR=/tmp/libs install
- Anywhere else, create test.cpp with the following content:
#include <libsinsp/sinsp.h>
int main()
{
sinsp inspector;
}
- Try to build test.cpp
g++ test.cpp -o test $(PKG_CONFIG_PATH=/tmp/libs/usr/local/lib/pkgconfig pkg-config --static --cflags --libs libsinsp libscap)
Expected behaviour
I expected the binary to compile and link.
Screenshots
g++ test.cpp -o test $(PKG_CONFIG_PATH=/tmp/libs/usr/local/lib/pkgconfig pkg-config --static --cflags --libs libsinsp libscap) [1]
/usr/bin/ld: cannot find -linstall_lib_link_libraries-NOTFOUND: No such file or directory
/usr/bin/ld: cannot find -lpman: No such file or directory
collect2: error: ld returned 1 exit status
I removed the bogus -linstall_lib_link_libraries-NOTFOUND and copied libpman.a over manually, so the linker at least tried to do the job. That resulted in thousands upon thousands lines of missing symbol errors, complaining about literally everything. I'm not going to paste everything here, so just a sample which seems to be about libbpf:
/usr/bin/ld: /tmp/libs/usr/local/lib/pkgconfig/../../lib/libpman.a(programs.c.o): in function `pman_detach_syscall_enter_dispatcher':
/home/blackfire/src/draios/workspace-oss/falco-libs/userspace/libpman/src/programs.c:196: undefined reference to `bpf_link__destroy'
/usr/bin/ld: /tmp/libs/usr/local/lib/pkgconfig/../../lib/libpman.a(programs.c.o): in function `pman_detach_syscall_exit_dispatcher':
/home/blackfire/src/draios/workspace-oss/falco-libs/userspace/libpman/src/programs.c:207: undefined reference to `bpf_link__destroy'
/usr/bin/ld: /tmp/libs/usr/local/lib/pkgconfig/../../lib/libpman.a(programs.c.o): in function `pman_detach_sched_proc_exit':
/home/blackfire/src/draios/workspace-oss/falco-libs/userspace/libpman/src/programs.c:218: undefined reference to `bpf_link__destroy'
/usr/bin/ld: /tmp/libs/usr/local/lib/pkgconfig/../../lib/libpman.a(programs.c.o): in function `pman_detach_sched_switch':
/home/blackfire/src/draios/workspace-oss/falco-libs/userspace/libpman/src/programs.c:229: undefined reference to `bpf_link__destroy'
/usr/bin/ld: /tmp/libs/usr/local/lib/pkgconfig/../../lib/libpman.a(programs.c.o): in function `pman_detach_page_fault_user':
/home/blackfire/src/draios/workspace-oss/falco-libs/userspace/libpman/src/programs.c:267: undefined reference to `bpf_link__destroy'
/usr/bin/ld: /tmp/libs/usr/local/lib/pkgconfig/../../lib/libpman.a(programs.c.o):/home/blackfire/src/draios/workspace-oss/falco-libs/userspace/libpman/src/programs.c:280: more undefined references to `bpf_link__destroy' follow
/usr/bin/ld: warning: creating DT_TEXTREL in a PIE
collect2: error: ld returned 1 exit status
Environment
- Falco version: no Falco, some recent
libscheckout - OS: pop_OS 22.04
- Installation method: straight from source
Additional context
I can accept PEBKAC as an explanation (I'm several yaks deep and wanted this to Just Work) but I'd still like to have a binary in the end :)