Avoid that leftover files affect the build; instead, use the same
mechanism that was in place before the Meson transition of updating
a file from import_core.sh.  Starting with Meson 0.57, the file
can be easily read from the filesystem module, so do that instead
of using run_command.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 target/xtensa/cores.list     | 9 +++++++++
 target/xtensa/import_core.sh | 3 +++
 target/xtensa/meson.build    | 4 ++--
 3 files changed, 14 insertions(+), 2 deletions(-)
 create mode 100644 target/xtensa/cores.list

diff --git a/target/xtensa/cores.list b/target/xtensa/cores.list
new file mode 100644
index 0000000000..5772a00ab2
--- /dev/null
+++ b/target/xtensa/cores.list
@@ -0,0 +1,9 @@
+core-dc232b.c
+core-dc233c.c
+core-de212.c
+core-de233_fpu.c
+core-dsp3400.c
+core-fsf.c
+core-sample_controller.c
+core-test_kc705_be.c
+core-test_mmuhifi_c3.c
diff --git a/target/xtensa/import_core.sh b/target/xtensa/import_core.sh
index 396b264be9..df66d09393 100755
--- a/target/xtensa/import_core.sh
+++ b/target/xtensa/import_core.sh
@@ -66,3 +66,6 @@ static XtensaConfig $NAME __attribute__((unused)) = {
 
 REGISTER_CORE($NAME)
 EOF
+
+grep -qxf core-${NAME}.c "$BASE"/cores.list || \
+    echo core-${NAME}.c >> "$BASE"/cores.list
diff --git a/target/xtensa/meson.build b/target/xtensa/meson.build
index 7c4efa6c62..20bbf9b335 100644
--- a/target/xtensa/meson.build
+++ b/target/xtensa/meson.build
@@ -1,7 +1,7 @@
 xtensa_ss = ss.source_set()
 
-xtensa_cores = run_command('sh', '-c', 'cd $MESON_SOURCE_ROOT/$MESON_SUBDIR ; ls -1 core-*.c')
-xtensa_ss.add(files(xtensa_cores.stdout().strip().split('\n')))
+xtensa_cores = fs.read('cores.list')
+xtensa_ss.add(files(xtensa_cores.strip().split('\n')))
 
 xtensa_ss.add(files(
   'cpu.c',
-- 
2.31.1