[redhat] perf: switch back to static linking of libbpf

JIRA: https://issues.redhat.com/browse/RHEL-121921

Upstream Status: RHEL-only

description
===========
Revisiting the approach of libbpf linking in perf: Since the core
of libbpf code lies in the same repository/SRPM as perf comes from,
the problem with having to rebuild perf once a bug is fixed in the
library is not a thing. So finally, through the libbpf package we
got the fixes later than when linked statically against the library
from the same source tree. Static linking also allows us to adapt
to API changes instantly. Finally, this change aligns with what we
have in Fedora/ARK now.

With this change, perf is no more dependent on libbpf{,-devel} RPM.

Signed-off-by: Michael Petlan <mpetlan@redhat.com>

Author: rfmvh

redhat/kernel.spec.template

@@ -644,7 +644,6 @@ BuildRequires: sparse
 BuildRequires: zlib-devel binutils-devel newt-devel perl(ExtUtils::Embed) bison flex xz-devel
 BuildRequires: audit-libs-devel python3-setuptools
 BuildRequires: java-devel
-BuildRequires: libbpf-devel >= 0.6.0-1
 BuildRequires: libbabeltrace-devel
 BuildRequires: libtraceevent-devel
 %ifnarch %{arm} s390x
@@ -2613,7 +2612,7 @@ InitBuildVars
 %global perf_build_extra_opts CORESIGHT=1
 %endif
 %global perf_make \
-  %{__make} %{?make_opts} EXTRA_CFLAGS="${RPM_OPT_FLAGS}" EXTRA_CXXFLAGS="${RPM_OPT_FLAGS}" LDFLAGS="%{__global_ldflags} -Wl,-E" %{?cross_opts} -C tools/perf V=1 NO_PERF_READ_VDSO32=1 NO_PERF_READ_VDSOX32=1 WERROR=0 NO_LIBUNWIND=1 NO_GTK2=1 NO_STRLCPY=1 NO_BIONIC=1 LIBBPF_DYNAMIC=1 LIBTRACEEVENT_DYNAMIC=1 %{?perf_build_extra_opts} prefix=%{_prefix} PYTHON=%{__python3}
+  %{__make} %{?make_opts} EXTRA_CFLAGS="${RPM_OPT_FLAGS}" EXTRA_CXXFLAGS="${RPM_OPT_FLAGS}" LDFLAGS="%{__global_ldflags} -Wl,-E" %{?cross_opts} -C tools/perf V=1 NO_PERF_READ_VDSO32=1 NO_PERF_READ_VDSOX32=1 WERROR=0 NO_LIBUNWIND=1 NO_GTK2=1 NO_STRLCPY=1 NO_BIONIC=1 LIBTRACEEVENT_DYNAMIC=1 %{?perf_build_extra_opts} prefix=%{_prefix} PYTHON=%{__python3}
 %if %{with_perf}
 # perf
 # make sure check-headers.sh is executable