Hi Chengyu,

On 2026/1/10 16:27, ChengyuZhu6 wrote:
From: Chengyu Zhu <[email protected]>

Currently, the platform is hard-coded to "linux/amd64" if not specified.
This patch introduces `ocierofs_get_platform_spec` helper to detect the
host platform (OS and architecture) at compile time.

Signed-off-by: Chengyu Zhu <[email protected]>
---
  lib/remotes/oci.c | 46 ++++++++++++++++++++++++++++++++++++++++++++--
  1 file changed, 44 insertions(+), 2 deletions(-)

diff --git a/lib/remotes/oci.c b/lib/remotes/oci.c
index c8711ea..911abd5 100644
--- a/lib/remotes/oci.c
+++ b/lib/remotes/oci.c
@@ -1089,13 +1089,55 @@ static int ocierofs_parse_ref(struct ocierofs_ctx *ctx, 
const char *ref_str)
        return 0;
  }
+static char *ocierofs_get_platform_spec(void)
+{
+#if defined(__linux__)
+       const char *os = "linux";
+#elif defined(__APPLE__)
+       const char *os = "darwin";
+#elif defined(_WIN32)
+       const char *os = "windows";
+#elif defined(__FreeBSD__)
+       const char *os = "freebsd";
+#else

Is there an unknown os annotation or we should just error out?

+       const char *os = "linux";
+#endif

I think it would be better to rearrange it as:
        const char *os, *platform;


#if defined(__linux__)
        os = "linux";
#elif defined(__APPLE__)
        os = "darwin"
#elif ...
#else
        return -EOPNOTSUPP;
#endif

+
+#if defined(__x86_64__) || defined(__amd64__)
+       const char *arch = "amd64";
+#elif defined(__aarch64__) || defined(__arm64__)
+       const char *arch = "arm64";
+#elif defined(__i386__)
+       const char *arch = "386";
+#elif defined(__arm__)
+       const char *arch = "arm";
+#elif defined(__riscv) && (__riscv_xlen == 64)
+       const char *arch = "riscv64";
+#elif defined(__ppc64__)
+#if defined(__BYTE_ORDER__) && (__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__)
+       const char *arch = "ppc64le";
+#else
+       const char *arch = "ppc64";
+#endif
+#elif defined(__s390x__)
+       const char *arch = "s390x";
+#else
+       const char *arch = "amd64";

Same here and
Is there an unknown platform annotation or we should just error out?

Thanks,
Gao Xiang


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