Add moxiebox as a choice for libc

This required some rework of the libc selection, as moxiebox is a layer on
top of another libc - newlib.

Also, moxiebox'es host VM (`sandbox`) needs a libcrypto on the host. We will
not have it if we're cross-compiling a canadian cross. Fortunately, all moxiebox
needs from libcrypto is SHA256, and it already includes a standalone implementation
of SHA256 in its runtime. Provide a little wrapper that allows moxiebox use
that implementation for the host binary, too.

Also, automate collecting/printing the list of all packages in a given category
(e.g. LIBC or COMP_TOOLS), generate a list of all Kconfig symbols for a given
category.

Signed-off-by: Alexey Neyman <stilor@att.net>

1 files changed, 25 insertions, 0 deletions

diff --git a/packages/moxiebox/sha256_wrap.c b/packages/moxiebox/sha256_wrap.c
new file mode 100644
index 00000000..15800c42
--- /dev/null
+++ b/packages/moxiebox/sha256_wrap.c
@@ -0,0 +1,25 @@
+/*
+    Wrapper around moxiebox'es implementation of SHA256 digest that
+    mimics the API of the OpenSSL implementation.
+*/
+
+#include "sha.h"
+#include "../runtime/sha256.c"
+
+void
+SHA256_Init(SHA256_CTX *ctx)
+{
+    sha256_init(ctx);
+}
+
+void
+SHA256_Update(SHA256_CTX *ctx, const void *data, size_t len)
+{
+    sha256_update(ctx, data, len);
+}
+
+void
+SHA256_Final(unsigned char *md, SHA256_CTX *ctx)
+{
+    sha256_final(ctx, md);
+}