Downgrade libbpf-sys to 0.4.0-2 on Fedora 35 and earlier

libbpf-rs-downgrade-libbpf-sys.patch

@@ -0,0 +1,23 @@
+diff -Naur a/Cargo.toml b/Cargo.toml
+--- a/Cargo.toml	2021-10-24 12:22:44.163859672 -0700
++++ b/Cargo.toml	2021-10-24 12:21:45.897083132 -0700
+@@ -24,7 +24,7 @@
+ version = "1.3"
+ 
+ [dependencies.libbpf-sys]
+-version = "0.5.0-1"
++version = "0.4.0-2"
+ 
+ [dependencies.nix]
+ version = "0.22"
+diff -Naur a/src/object.rs b/src/object.rs
+--- a/src/object.rs	1973-11-29 13:33:09.000000000 -0800
++++ b/src/object.rs	2021-10-24 12:21:56.128219497 -0700
+@@ -67,7 +67,6 @@
+             pin_root_path: ptr::null(),
+             attach_prog_fd: 0,
+             kconfig: ptr::null(),
+-            btf_custom_path: ptr::null(),
+         }
+     }
+ 

rust-libbpf-rs.spec

@@ -16,6 +16,9 @@ URL:            https://crates.io/crates/libbpf-rs
 Source:         %{crates_source}
 # Turn on the novendor feature by default
 Patch0:         libbpf-rs-fix-metadata.diff
+# Downgrade libbpf-sys to 0.4.0-2; this patch is meant for Fedora 35 and lower
+# where libbpf is still at 0.4.0
+Patch1:         libbpf-rs-downgrade-libbpf-sys.patch
 
 ExclusiveArch:  %{rust_arches}
 %if %{__cargo_skip_build}
@@ -68,7 +71,11 @@ which use "novendor" feature of "%{crate}" crate.
 %ghost %{cargo_registry}/%{crate}-%{version_no_tilde}/Cargo.toml
 
 %prep
-%autosetup -n %{crate}-%{version_no_tilde} -p1
+%setup -q -n %{crate}-%{version_no_tilde}
+%patch0 -p1
+%if 0%{?fedora} < 36
+%patch1 -p1
+%endif
 %cargo_prep
 
 %generate_buildrequires