tests: add test harness for %_include_frame_pointers

tests/include-frame-pointers/main.fmf

@@ -0,0 +1,7 @@
+summary: Test that conditional support for frame pointers works
+
+require:
+  - grep
+  - redhat-rpm-config
+  - rpm
+test: ./runtest.sh

tests/include-frame-pointers/runtest.sh

@@ -0,0 +1,52 @@
+#!/bin/sh
+
+# Not using set -e on purpose as we manually validate the exit codes to print
+# useful messages.
+set -u
+
+passed=0
+failed=0
+
+rpmeval() {
+  # Note: --eval needs to always be *last* here
+  rpm "$@" --eval='%optflags'
+}
+
+validate() {
+  ret=$?
+  if [ $ret -eq 0 ]; then
+    echo "PASS: $*"
+    passed=$((passed+1))
+  else
+    echo "FAIL: $*"
+    failed=$((failed+1))
+  fi
+}
+
+for arch in aarch64 armv7hl i386 i486 i585 i686 athlon x86_64 ppc64le s390x riscv64; do
+  case "$arch" in
+    x86_64|aarch64)
+      flags='-fno-omit-frame-pointer -mno-omit-leaf-frame-pointer'
+      ;;
+    s390x)
+      flags='-fno-omit-frame-pointer -mbackchain'
+      ;;
+    *)
+      flags='-fno-omit-frame-pointer'
+      ;;
+  esac
+
+  rpmeval --target="${arch}-linux" --define='%_include_frame_pointers 1' | grep -q -- "$flags"
+  validate "[${arch}] Test that the flags are included if the macro is defined"
+
+  rpmeval --target="${arch}-linux" --undefine='_include_frame_pointers' | grep -qv -- "$flags"
+  validate "[${arch}] Test that the flags are _not_ included if the macro is undefined"
+
+  rpmeval --target="${arch}-linux" | grep -q -- "$flags"
+  validate "[${arch}] Test that the flags are included by default"
+done
+
+echo
+echo "${passed} passed, ${failed} failed"
+
+exit "$failed"