RPM: Use kernel build directory corresponding to kernel-devel

CHANGES

@@ -1,3 +1,9 @@
+The following major changes have been made since LKRG 0.9.7:
+
+ *) RPM spec file improvements to make it work or properly fail in a wider set
+ of circumstances
+
+
 The following major changes have been made between LKRG 0.9.6 and 0.9.7:
 
  *) Support new mainline kernels 6.4 to 6.5.x, and hopefully beyond

lkrg.spec

@@ -5,12 +5,12 @@
 Summary: Linux Kernel Runtime Guard (LKRG)
 Name: lkrg
 Version: 0.9.7
-Release: 1%{?dist}
+Release: 2%{?dist}
 License: GPLv2
 URL: https://lkrg.org
 Source: https://lkrg.org/download/%name-%version.tar.gz
 ExclusiveArch: %ix86 x86_64 %arm32 %arm64
-BuildRequires: make, gcc, kernel-devel
+BuildRequires: make, gcc, elfutils-libelf-devel, kernel, kernel-devel
 BuildRoot: /override/%name-%version
 
 %description
@@ -28,7 +28,7 @@ as open a file) based on the unauthorized credentials.
 %setup -q
 
 %build
-make %{?_smp_mflags}
+make %{?_smp_mflags} KERNELRELEASE=%kmod_headers_version
 
 %install
 rm -rf %buildroot
@@ -55,6 +55,12 @@ echo 'To enable LKRG on bootup please use: systemctl enable lkrg'
 %_sysconfdir/sysctl.d/*
 
 %changelog
+* Thu Sep 14 2023 Solar Designer <[email protected]> 0.9.7-2
+- Use kernel build directory corresponding to the kernel-devel package, not to
+the currently running kernel
+- "BuildRequires: kernel" for the /lib/modules/* directory
+- "BuildRequires: elfutils-libelf-devel" to support CONFIG_UNWINDER_ORC=y
+
 * Thu Sep 14 2023 Solar Designer <[email protected]> 0.9.7-1
 - Wrote this rough RPM spec file for Red Hat'ish distros, seems to work fine on
 RHEL 7, 8, 9 rebuilds, but is only reliable when there's exactly one