Add llvm dependency if clang toolchain used

Also remove the in-repo test for this functionality. This was not
actually enabled, and is the wrong test kind to boot (tmt rather
than sti). The actual test for this lives in the corresponding
tests repository.

Resolves: rhbz#2193406

redhat-rpm-config.spec

@@ -6,7 +6,7 @@
 
 Summary: Red Hat specific rpm configuration files
 Name: redhat-rpm-config
-Version: 200
+Version: 201
 Release: 1%{?dist}
 # No version specified.
 License: GPL+
@@ -127,6 +127,9 @@ Requires: %{_bindir}/grep
 Requires: %{_bindir}/sed
 Requires: %{_bindir}/xargs
 
+# for brp-llvm-compile-lto-elf
+Requires: (llvm if clang)
+
 # -fstack-clash-protection and -fcf-protection require GCC 8.
 Conflicts: gcc < 8.0.1-0.22
 
@@ -250,6 +253,10 @@ install -p -m 644 -t %{buildroot}%{_rpmluadir}/fedora/srpm forge.lua
 %doc buildflags.md
 
 %changelog
+* Mon May 08 2023 Nikita Popov <npopov@redhat.com> - 201-1
+- Add llvm dependency if clang toolchain used
+- Resolves: rhbz#2193406
+
 * Wed Apr 19 2023 Nikita Popov <npopov@redhat.com> - 200-1
 - Change clang LTO default to ThinLTO
 - Resolves: rhbz#2178788

tests/brp-llvm-compile-lto-elf/brp-llvm-compile-lto-elf-test-lib/brp-llvm-compile-lto-elf-test-lib.c

@@ -1,5 +0,0 @@
-#include <stdio.h>
-
-void hello(void) {
-    printf("Hello, world!\n");
-}

tests/brp-llvm-compile-lto-elf/brp-llvm-compile-lto-elf-test-lib/brp-llvm-compile-lto-elf-test-lib.h

@@ -1 +0,0 @@
-void hello(void);

tests/brp-llvm-compile-lto-elf/brp-llvm-compile-lto-elf-test-lib/brp-llvm-compile-lto-elf-test-lib.spec

@@ -1,34 +0,0 @@
-Name: brp-llvm-compile-lto-elf-test-lib
-Version: 1
-Release: 1
-Summary: Library package for testing brp-llvm-compile-lto-elf
-License: MIT
-
-BuildRequires: clang binutils
-Source0: %{name}.c
-Source1: %{name}.h
-
-# FIXME: I'm not sure why this doesn't work
-%undefine _package_note_file
-
-%global toolchain clang
-
-%description
-%{summary}
-
-%build
-
-clang ${CFLAGS} -c %{SOURCE0} -o lib.o
-ar cr %{name}.a lib.o
-ranlib %{name}.a
-
-%install
-mkdir -p %{buildroot}%{_libdir}
-mkdir -p %{buildroot}%{_includedir}
-
-%{__install} -p -m 644 -t %{buildroot}%{_libdir} %{name}.a
-%{__install} -p -m 644 -t %{buildroot}%{_includedir} %{SOURCE1}
-
-%files
-%{_libdir}/%{name}.a
-%{_includedir}/%{name}.h

tests/brp-llvm-compile-lto-elf/brp-llvm-compile-lto-elf-test/brp-llvm-compile-lto-elf-test.c

@@ -1,6 +0,0 @@
-#include <brp-llvm-compile-lto-elf-test-lib.h>
-
-int main(int argc, char **argv) {
-  hello();
-  return 0;
-}

tests/brp-llvm-compile-lto-elf/brp-llvm-compile-lto-elf-test/brp-llvm-compile-lto-elf-test.spec

@@ -1,24 +0,0 @@
-Name: brp-llvm-compile-lto-elf-test
-Version: 1
-Release: 1
-Summary: Library package for testing brp-llvm-compile-lto-elf
-License: MIT
-
-BuildRequires: gcc
-BuildRequires: brp-llvm-compile-lto-elf-test-lib
-
-Source0: %{name}.c
-
-# FIXME: I'm not sure why this doesn't work
-%undefine _package_note_file
-
-
-%description
-%{summary}
-
-%build
-gcc ${CFLAGS} -c %{SOURCE0} -o %{name}.o
-gcc ${LDFLAGS} %{name}.o %{_libdir}/%{name}-lib.a -o %{name}
-
-%check
-./%{name} | grep "Hello, world!"

tests/brp-llvm-compile-lto-elf/main.fmf

@@ -1,8 +0,0 @@
-Summary: Test that the brp-llvm-compile-lto-elf script is working correctly
-
-require:
-  - dnf-plugins-core
-  - redhat-rpm-config
-  - rpm-build
-
-test: ./runtest.sh

tests/brp-llvm-compile-lto-elf/runtest.sh

@@ -1,17 +0,0 @@
-#!/bin/bash
-
-set -ex
-
-lib_dir=brp-llvm-compile-lto-elf-test-lib
-lib_spec=$lib_dir/brp-llvm-compile-lto-elf-test-lib.spec
-
-dnf -y build-dep $lib_spec 
-rpmbuild --define "_sourcedir ." --define "_builddir ./$lib_dir" --define "_rpmdir ."  -bb $lib_spec
-
-dnf -y install ./`rpm --eval '%{_arch}'`/*.rpm
-
-test_dir=brp-llvm-compile-lto-elf-test
-test_spec=$test_dir/brp-llvm-compile-lto-elf-test.spec
-
-dnf -y build-dep $test_spec
-rpmbuild --define "_sourcedir ." --define "_builddir ./$test_dir" -bi $test_spec