tests: add testcases for confirming desired sysroot behavior regarding -uninstalled packages

tests/sysroot.sh

@@ -6,7 +6,9 @@ tests_init \
 	cflags \
 	variable \
 	do_not_eat_slash \
-	do_not_duplicate_sysroot_dir
+	do_not_duplicate_sysroot_dir \
+	uninstalled \
+	uninstalled_fdo
 
 do_not_eat_slash_body()
 {
@@ -61,3 +63,24 @@ do_not_duplicate_sysroot_dir_body()
 		-o inline:"-I${SYSROOT_DIR}/usr/include \n" \
 		pkgconf --cflags sysroot-dir-4
 }
+
+uninstalled_body()
+{
+	export PKG_CONFIG_PATH="${selfdir}/lib1"
+	export PKG_CONFIG_SYSROOT_DIR="/sysroot"
+
+	atf_check \
+		-o inline:"-lomg \n" \
+		pkgconf --libs omg
+}
+
+uninstalled_fdo_body()
+{
+	export PKG_CONFIG_PATH="${selfdir}/lib1"
+	export PKG_CONFIG_SYSROOT_DIR="/sysroot"
+	export PKG_CONFIG_FDO_SYSROOT_RULES="1"
+
+	atf_check \
+		-o inline:"-L/sysroot/test/lib -lomg \n" \
+		pkgconf --libs omg
+}