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Create Alpine Linux unified kernel image with netboot

This explains how to create an Alpine Linux unified kernel image (UKI) with netboot.

For this we need:

• a kernel
• an initramfs image
• a modloop image (a squashfs image with the kernel modules for the kernel)
• the ukify tool from systemd

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#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <poll.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <unistd.h>

int close_fds(int from_fd, int max_fd)

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- New macro XDT_VERSION_INIT(SEMVER[, TAG])

This macro takes care of setting up the version numbering.

It will define the following macros based on SEMVER and TAG:

   - xdt_version
   - xdt_version_major

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dnl XDT_VERSION_INIT(SEMVER, [TAG])
dnl
dnl This macro takes care of setting up the version numbering.
dnl
dnl it will define the following macros based on  SEMVER and SUFFIX:
dnl
dnl  - xdt_version_full
dnl  - xdt_version_major
dnl  - xdt_version_minor
dnl  - xdt_version_micro

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#0  EVP_MD_CTX_cleanup (ctx=ctx@entry=0x0) at evp/digest.c:379
#1  0x00000e63729fdd42 in EVP_MD_CTX_free (ctx=0x0) at src/mongoc/mongoc-crypto-openssl.c:51
#2  0x000069e0cdee69e5 in tls1_handshake_hash_free (s=s@entry=0xe63760a9f40) at t1_hash.c:109
#3  0x000069e0cdecae68 in ssl3_clear (s=s@entry=0xe63760a9f40) at s3_lib.c:1638
#4  0x000069e0cdee6b97 in tls1_clear (s=0xe63760a9f40) at t1_lib.c:174
#5  0x000069e0cdecac6d in ssl3_new (s=s@entry=0xe63760a9f40) at s3_lib.c:1578
#6  0x000069e0cdee6b4f in tls1_new (s=0xe63760a9f40) at t1_lib.c:155
#7  0x000069e0cded7f7b in SSL_new (ctx=ctx@entry=0xe63760a73e0) at ssl_lib.c:358
#8  0x000069e0cdec3c62 in BIO_new_ssl (ctx=ctx@entry=0xe63760a73e0, client=client@entry=1) at bio_ssl.c:545
#9  0x00000e63729fcf6a in mongoc_stream_tls_openssl_new (base_stream=0xe63760a7340, host=host@entry=0x0, opt=0x74814cf2fb98, client=1)

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diff --git a/thread_pthread.c b/thread_pthread.c
index 951885ffa0..6c9241dd58 100644
--- a/thread_pthread.c
+++ b/thread_pthread.c
@@ -530,9 +530,6 @@ hpux_attr_getstackaddr(const pthread_attr_t *attr, void **addr)
 #   define MAINSTACKADDR_AVAILABLE 0
 # endif
 #endif
-#if MAINSTACKADDR_AVAILABLE && !defined(get_main_stack)
-# define get_main_stack(addr, size) get_stack(addr, size)

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>>> lz4: abuild 3.1.0-r4
>>> lz4: Checking sanity of /home/buildozer/aports/main/lz4/APKBUILD...
>>> lz4: Analyzing dependencies...
>>> lz4: Installing for build: build-base diffutils
(1/2) Installing diffutils (3.6-r0)
(2/2) Installing .makedepends-lz4 (0)
Executing busybox-1.27.2-r7.trigger
OK: 222 MiB in 110 packages
>>> lz4: Cleaning temporary build dirs...
>>> lz4: Fetching lz4-1.8.1.tar.gz::https://github.com/lz4/lz4/archive/v1.8.1.tar.gz

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import threading
import sys

def f(n=0):
    try:
        print(n)
        f(n+1)
    except Exception:
        print("we hit recursion limit")
        sys.exit(0)

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Alpine Linux Code of Conduct

This Code of Conduct applies to participants in Alpine projects, such as the Alpine Linux distribution.

Diversity and inclusion make the Alpine community strong. Anybody who wishes to participate in the Alpine community are welcome as long as they follow this Code of Conduct.

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--- config-vanilla.x86_64
+++ config-vanilla.ppc64le
@@ -1,52 +1,74 @@
 #
 # Automatically generated file; DO NOT EDIT.
-# Linux/x86_64 4.9.13 Kernel Configuration
+# Linux/powerpc 4.4.43 Kernel Configuration
 #
+CONFIG_PPC64=y
+