#!/bin/sh

# Look for "unset", you'll find the values you can override in $1 or
# $build_dir/local_conf.sh file, that in order to tune the script for your
# specific distro/needs.

# Usage, drop the script at the top of source tree, create somewhere else
# a build directory, cd into it, and call from there this script.
#===============================================================================
# build dir and src dir
build_dir=$(readlink -f .)
echo "build_dir=$build_dir"
# we are in contrib
src_dir=$(readlink -f $(dirname $0)/..)
echo "src_dir=$src_dir"
#===============================================================================
# the current configur-able variables may be individually overridden with the
# content of the file in $1 or $build_dir/local_conf.sh. Look for "unset"
# in those scripts to find what you can override to tune the build.
if test -f "$1"; then
	. "$1"
else
	if test -f $build_dir/local_conf.sh; then
		. $build_dir/local_conf.sh
	fi
fi
#===============================================================================
if test "${slibcc-unset}" = unset; then
slibcc='cc -c'
fi

if test "${ar-unset}" = unset; then
ar='ar rcs'
fi
#===============================================================================
if test "${prefix-unset}" = unset; then
prefix=/usr
fi
#===============================================================================
if test "${zlib_cppflags-unset}" = unset; then
zlib_cppflags='-I/usr/include'
fi
#===============================================================================
# config.h
printf '#include <eu-config.h>\n' >$build_dir/config.h
#===============================================================================
# libelf
libelf_src_files="\
elf_version.c \
elf_hash.c \
elf_error.c \
elf_fill.c \
elf_begin.c \
elf_next.c \
elf_rand.c \
elf_end.c \
elf_kind.c \
gelf_getclass.c \
elf_getbase.c \
elf_getident.c \
elf32_fsize.c \
elf64_fsize.c \
gelf_fsize.c \
elf32_xlatetof.c \
elf32_xlatetom.c \
elf64_xlatetof.c \
elf64_xlatetom.c \
gelf_xlate.c \
elf32_getehdr.c \
elf64_getehdr.c \
gelf_getehdr.c \
elf32_newehdr.c \
elf64_newehdr.c \
gelf_newehdr.c \
gelf_update_ehdr.c \
elf32_getphdr.c \
elf64_getphdr.c \
gelf_getphdr.c \
elf32_newphdr.c \
elf64_newphdr.c \
gelf_newphdr.c \
gelf_update_phdr.c \
elf_getarhdr.c \
elf_getarsym.c \
elf_rawfile.c \
elf_readall.c \
elf_cntl.c \
elf_getscn.c \
elf_nextscn.c \
elf_ndxscn.c \
elf_newscn.c \
elf32_getshdr.c \
elf64_getshdr.c \
gelf_getshdr.c \
gelf_update_shdr.c \
elf_strptr.c \
elf_rawdata.c \
elf_getdata.c \
elf_newdata.c \
elf_getdata_rawchunk.c \
elf_flagelf.c \
elf_flagehdr.c \
elf_flagphdr.c \
elf_flagscn.c \
elf_flagshdr.c \
elf_flagdata.c \
elf_memory.c \
elf_update.c \
elf32_updatenull.c \
elf64_updatenull.c \
elf32_updatefile.c \
elf64_updatefile.c \
gelf_getsym.c \
gelf_update_sym.c \
gelf_getversym.c \
gelf_getverneed.c \
gelf_getvernaux.c \
gelf_getverdef.c \
gelf_getverdaux.c \
gelf_getrel.c \
gelf_getrela.c \
gelf_update_rel.c \
gelf_update_rela.c \
gelf_getdyn.c \
gelf_update_dyn.c \
gelf_getmove.c \
gelf_update_move.c \
gelf_getsyminfo.c \
gelf_update_syminfo.c \
gelf_getauxv.c \
gelf_update_auxv.c \
gelf_getnote.c \
gelf_xlatetof.c \
gelf_xlatetom.c \
nlist.c \
gelf_getsymshndx.c \
gelf_update_symshndx.c \
gelf_update_versym.c \
gelf_update_verneed.c \
gelf_update_vernaux.c \
gelf_update_verdef.c \
gelf_update_verdaux.c \
elf_getphdrnum.c \
elf_getshdrnum.c \
elf_getshdrstrndx.c \
gelf_checksum.c \
elf32_checksum.c \
elf64_checksum.c \
libelf_crc32.c \
libelf_next_prime.c \
elf_clone.c \
gelf_getlib.c \
gelf_update_lib.c \
elf32_offscn.c \
elf64_offscn.c \
gelf_offscn.c \
elf_getaroff.c \
elf_gnu_hash.c \
elf_scnshndx.c \
elf32_getchdr.c \
elf64_getchdr.c \
gelf_getchdr.c \
elf_compress.c \
elf_compress_gnu.c
"
GLIBC_CPPFLAGS="\
-DHAVE_ERROR_H \
-DHAVE_DECL_POWEROF2 \
-DHAVE_DECL_MEMPCPY \
-DHAVE_DECL_REALLOCARRAY \
"
CPPFLAGS="\
-I$build_dir \
-I$src_dir/lib \
-I$src_dir/libelf \
\
$GLIBC_CPPFLAGS \
\
-DHAVE_VISIBILITY \
-DPIC \
-DSHARED \
-D_GNU_SOURCE \
-DHAVE_CONFIG_H \
\
$zlib_cppflags \
"
for f in $libelf_src_files
do
	libelf_obj=$build_dir/$(basename $f .c).o
	libelf_a="$libelf_a $libelf_obj"
	printf "SLIBCC $f\n"
	$slibcc $CPPFLAGS $src_dir/libelf/$f -o $libelf_obj &
done
#===============================================================================
mkdir -p $build_dir/install_root/$prefix/include/libelf
cp \
$src_dir/libelf/libelf.h \
$src_dir/libelf/gelf.h \
$src_dir/libelf/nlist.h \
$build_dir/install_root/$prefix/include/libelf
#===============================================================================
mkdir -p $build_dir/install_root/$prefix/lib
wait
printf 'LIBELF AR\n'
$ar $build_dir/install_root/$prefix/lib/libelf.a $libelf_a