[RFC PATCH-for-9.1 22/29] hw/i386/fw_cfg: Define fw_cfg_build_smbios() stub

[Philippe Mathieu-Daudé <philmd@xxxxxxxxxx>]

We are going to refactor fw_cfg_build_smbios() in the
next patches. In order to avoid too much #ifdef'ry in
it, define a stub.

Signed-off-by: Philippe Mathieu-Daudé <philmd@xxxxxxxxxx>
---
 hw/i386/fw_cfg-smbios-stub.c | 15 +++++++++++++++
 hw/i386/fw_cfg.c             |  4 ++--
 hw/i386/meson.build          |  1 +
 3 files changed, 18 insertions(+), 2 deletions(-)
 create mode 100644 hw/i386/fw_cfg-smbios-stub.c

diff --git a/hw/i386/fw_cfg-smbios-stub.c b/hw/i386/fw_cfg-smbios-stub.c
new file mode 100644
index 0000000000..37dbfdee7c
--- /dev/null
+++ b/hw/i386/fw_cfg-smbios-stub.c
@@ -0,0 +1,15 @@
+/*
+ * QEMU fw_cfg/SMBIOS stubs
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ * SPDX-FileCopyrightText: 2024 Linaro Ltd.
+ */
+
+#include "qemu/osdep.h"
+#include "hw/firmware/smbios.h"
+#include "fw_cfg.h"
+
+void fw_cfg_build_smbios(PCMachineState *pcms, FWCfgState *fw_cfg,
+                         SmbiosEntryPointType ep_type)
+{
+}
diff --git a/hw/i386/fw_cfg.c b/hw/i386/fw_cfg.c
index ecc4047a4b..14a7dfbdc9 100644
--- a/hw/i386/fw_cfg.c
+++ b/hw/i386/fw_cfg.c
@@ -48,10 +48,10 @@ const char *fw_cfg_arch_key_name(uint16_t key)
     return NULL;
 }
 
+#ifdef CONFIG_SMBIOS
 void fw_cfg_build_smbios(PCMachineState *pcms, FWCfgState *fw_cfg,
                          SmbiosEntryPointType ep_type)
 {
-#ifdef CONFIG_SMBIOS
     uint8_t *smbios_tables, *smbios_anchor;
     size_t smbios_tables_len, smbios_anchor_len;
     struct smbios_phys_mem_area *mem_array;
@@ -100,8 +100,8 @@ void fw_cfg_build_smbios(PCMachineState *pcms, FWCfgState 
*fw_cfg,
         fw_cfg_add_file(fw_cfg, "etc/smbios/smbios-anchor",
                         smbios_anchor, smbios_anchor_len);
     }
-#endif
 }
+#endif
 
 FWCfgState *fw_cfg_arch_create(MachineState *ms,
                                       uint16_t boot_cpus,
diff --git a/hw/i386/meson.build b/hw/i386/meson.build
index d8b70ef3e9..1a6e731196 100644
--- a/hw/i386/meson.build
+++ b/hw/i386/meson.build
@@ -6,6 +6,7 @@ i386_ss.add(files(
   'multiboot.c',
   'x86.c',
 ))
+i386_ss.add(when: 'CONFIG_SMBIOS', if_false: files('fw_cfg-smbios-stub.c'))
 
 i386_ss.add(when: 'CONFIG_X86_IOMMU', if_true: files('x86-iommu.c'),
                                       if_false: files('x86-iommu-stub.c'))
-- 
2.41.0