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