libelf: all hail elfutils 0.180

linux 5.8 is set to release soon and it is incompatible with
elftoolchain's libelf (dejavu). we are moving to the last
libelf library available(?), elfutils.

extra/libelf/build

@@ -1,51 +1,20 @@
 #!/bin/sh -e
-#
-# Word splitting (for CFLAGS, CC, etc) is sadly required.
-# shellcheck disable=2086
-#
-# This package used to provide the old 'libelf' library. This had a sane
-# build system and caused us no trouble. There are two issues with the
-# old library, 1. It's been unmaintained for years. 2. The Linux kernel
-# will (soon) no longer be compatible with it.
-#
-# elfutils is not an option (as an alternative) as it heavily depends on
-# glibc. To package it for a musl based system 8 or so patches are needed
-# as well as various libc "extensions" from glibc (fts, obstack, argp).
-#
-# elftoolchain requires BSD make to build. Rather than package BSD make,
-# let's just do the equivalent ourselves in shell. This is fairly simple
-# as all we're building is 'libelf' and not the entire toolchain.
-export CFLAGS="-fPIC -O2 $CFLAGS"
-export LDFLAGS="-shared $LDFLAGS"
 
-# Patch unneeded in next release.
-patch -p1 < libelf-linux.patch
+patch -p1 < musl-decls.patch
 
-# Generate needed header file.
-common/native-elf-format > common/native-elf-format.h
+# Disable configure error for missing argp.
+sed -i 's/as_fn_error.*libargp/: "/g' configure
 
-# Generate needed .c files using m4.
-for file in libelf/*.m4; do
-    ${M4:-m4} -DSRCDIR=libelf "$file" > "${file%%.m4}.c"
-done
+# Don't compile two unrelated C files which require argp.
+sed -i 's/color.*printversion../#/g' lib/Makefile.in
 
-# Create all objects (.o).
-for file in libelf/*.c; do
-    ${CC:-cc} -I./libelf -I./common $CFLAGS $CPPFLAGS -c \
-        -o "${file%%.c}.o" "$file"
-done
+./configure \
+    --prefix=/usr \
+    --disable-symbol-versioning \
+    --disable-debuginfod \
+    --disable-nls
 
-mkdir -p "$1/usr/lib"
-
-# Create shared library.
-${CC:-cc} $LDFLAGS $CFLAGS -I./libelf -I./common libelf/*.o \
-    -o "$1/usr/lib/libelf.so.1"
-
-# Create static library.
-${AR:-ar} -rc "$1/usr/lib/libelf.a" libelf/*.o
-
-# Install remaining headers/files.
-ln -sf         libelf.so.1             "$1/usr/lib/libelf.so"
-install -Dm644 libelf/libelf.h         "$1/usr/include/libelf.h"
-install -Dm644 libelf/gelf.h           "$1/usr/include/gelf.h"
-install -Dm644 common/elfdefinitions.h "$1/usr/include/elfdefinitions.h"
+# Skip the default make target and build only what we need.
+make -C lib
+make -C libelf
+make -C libelf DESTDIR="$1" install

extra/libelf/checksums

@@ -1,2 +1,3 @@
-92bfe36f886024bbc433846483b026c7ce44d553b9b941a0fd13e451911ae297  elftoolchain-0.7.1.tgz
-239ed8fbc3393f7a39cbb6f3cad0278ac8b8d1306da9832c43dac1332a89ab28  libelf-linux.patch
+b827b6e35c59d188ba97d7cf148fa8dc6f5c68eb6c5981888dfdbb758c0b569d  elfutils-0.180.tar.bz2
+fd98976f5112b49f6469e7bd2e97d390cf90dc68392218dc713ac0449fc3e395  musl-decls.patch
+bf11b56670c7919b44e33b5b0f3a216b7f20cf2859b74bf5e2e837532f8e0579  error.h

extra/libelf/depends

@@ -1 +1 @@
-m4 make
+zlib

extra/libelf/files/error.h

@@ -0,0 +1,27 @@
+#ifndef _ERROR_H_
+#define _ERROR_H_
+
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+
+static unsigned int error_message_count = 0;
+
+static inline void error(int status, int errnum, const char* format, ...)
+{
+	va_list ap;
+	fprintf(stderr, "%s: ", program_invocation_name);
+	va_start(ap, format);
+	vfprintf(stderr, format, ap);
+	va_end(ap);
+	if (errnum)
+		fprintf(stderr, ": %s", strerror(errnum));
+	fprintf(stderr, "\n");
+	error_message_count++;
+	if (status)
+		exit(status);
+}
+
+#endif	/* _ERROR_H_ */

extra/libelf/patches/libelf-linux.patch

@@ -1,40 +0,0 @@
-From 4857158172f38c6f66a51f9249c7c49d846fa7e7 Mon Sep 17 00:00:00 2001
-From: jkoshy <jkoshy@95820547-d848-0410-985e-9ae8fe0fa350>
-Date: Sun, 9 Jun 2019 17:01:37 +0000
-Subject: [PATCH] Ensure that the value of a 32-bit parameter passed to the
- ELF64_R_INFO() macro does not get lost.
-
-Submitted by:	Michael Forney on -developers
-
-git-svn-id: svn://svn.code.sf.net/p/elftoolchain/code/trunk@3742 95820547-d848-0410-985e-9ae8fe0fa350
----
- common/elfdefinitions.h | 3 ++-
- 1 file changed, 2 insertions(+), 1 deletion(-)
-
-diff --git a/common/elfdefinitions.h b/common/elfdefinitions.h
-index 0c207226..235b66dd 100644
---- a/common/elfdefinitions.h
-+++ b/common/elfdefinitions.h
-@@ -2806,7 +2806,8 @@ typedef struct {
-
- #define ELF64_R_SYM(I)		((I) >> 32)
- #define ELF64_R_TYPE(I)		((I) & 0xFFFFFFFFUL)
--#define ELF64_R_INFO(S,T)	(((S) << 32) + ((T) & 0xFFFFFFFFUL))
-+#define ELF64_R_INFO(S,T)	\
-+	(((Elf64_Xword) (S) << 32) + ((T) & 0xFFFFFFFFUL))
-
- /*
-  * Symbol versioning structures.
-diff --git a/common/elfdefinitions.h b/common/elfdefinitions.h
-index caa6a30..6484017 100644
---- a/common/elfdefinitions.h
-+++ b/common/elfdefinitions.h
-@@ -42,6 +42,8 @@
- 
- #include <stdint.h>
- 
-+#define STN_UNDEF	0
-+
- /*
-  * Types of capabilities.
-  */

extra/libelf/patches/musl-decls.patch

@@ -0,0 +1,20 @@
+--- a/libelf/elf.h	2015-08-21 14:22:37.000000000 +0200
++++ b/libelf/elf.h	2015-11-20 04:54:33.948081321 +0100
+@@ -21,6 +21,17 @@
+
+ #include <features.h>
+
++#if !defined(__GLIBC__)
++/* C++ needs to know that types and declarations are C, not C++.  */
++#ifdef  __cplusplus
++# define __BEGIN_DECLS  extern "C" {
++# define __END_DECLS    }
++#else
++# define __BEGIN_DECLS
++# define __END_DECLS
++#endif
++#endif
++
+ __BEGIN_DECLS
+
+ /* Standard ELF types.  */

extra/libelf/sources

@@ -1,2 +1,3 @@
-https://downloads.sourceforge.net/sourceforge/elftoolchain/elftoolchain-0.7.1.tgz
-patches/libelf-linux.patch
+https://sourceware.org/elfutils/ftp/0.180/elfutils-0.180.tar.bz2
+patches/musl-decls.patch
+files/error.h lib

extra/libelf/version

@@ -1 +1 @@
-0.7.1 2
+0.180 1