oasis

gen.lua (3700B)

local arch = config.target.platform:match('[^-]*')
set('cflags_auto', {
	'-fomit-frame-pointer',
	'-fno-unwind-tables',
	'-fno-asynchronous-unwind-tables',
	'-ffunction-sections',
	'-fdata-sections',
})
set('cflags_c99fse', {
	'-std=c99',
	'-nostdinc',
	'-ffreestanding',
	'-fexcess-precision=standard',
	'-frounding-math',
	'-Wa,--noexecstack',
})
set('cflags_nossp', '-fno-stack-protector')
set('cflags_memops', '-fno-tree-loop-distribute-patterns')
cflags{
	'$cflags_auto',
	'$cflags_c99fse',
	'-Wno-return-local-addr',
	'-fPIC',
	'-D _XOPEN_SOURCE=700',
	'-I $srcdir/arch/'..arch,
	'-I $srcdir/arch/generic',
	'-I $outdir',
	'-I $srcdir/src/include',
	'-I $srcdir/src/internal',
	'-I $outdir/include',
}
set('ldflags', {
	'$ldflags',
	'-Wl,--sort-section,alignment',
	'-Wl,--sort-common',
	'-Wl,--gc-sections',
	'-Wl,--hash-style=both',
	'-Wl,--no-undefined',
	'-Wl,--exclude-libs=ALL',
	'-Wl,--dynamic-list=$srcdir/dynamic.list',
})
local basefiles = load('base.lua')
local archfiles = load(arch..'.lua')
local bits = {}
for _, hdr in ipairs(archfiles.bits) do
	archfiles.bits[hdr] = true
end
for _, hdr in ipairs(basefiles.bits) do
	if not archfiles.bits[hdr] then
		table.insert(bits, hdr)
	end
end
pkg.hdrs = {
	copy('$outdir/include', '$srcdir/include', basefiles.hdrs),
	copy('$outdir/include/bits', '$srcdir/arch/'..arch..'/bits', archfiles.bits),
	copy('$outdir/include/bits', '$srcdir/arch/generic/bits', bits),
	'$outdir/include/bits/alltypes.h',
	'$outdir/include/bits/syscall.h',
	install=true,
}
pkg.deps = {
	'$gendir/headers',
	'$outdir/version.h',
}
build('sed', '$outdir/include/bits/alltypes.h', {
	'$srcdir/arch/'..arch..'/bits/alltypes.h.in',
	'$srcdir/include/alltypes.h.in',
	'|', '$srcdir/tools/mkalltypes.sed',
}, {expr='-f $srcdir/tools/mkalltypes.sed'})
build('sed', '$outdir/include/bits/syscall.h', {'$srcdir/arch/'..arch..'/bits/syscall.h.in'}, {
	expr=[[-n -e 'p;s,__NR_,SYS_,p']],
})
build('awk', '$outdir/version.h', '$dir/ver', {expr=[['{printf "#define VERSION \"%s\"\n", $$1}']]})
local srcs, objs = {}, {}
for src in iterstrings{basefiles.srcs, archfiles.srcs} do
	srcs[src:match('(.*)%.'):gsub('/'..arch..'/', '/', 1)] = src
end
local specialcflags = {
	-- src/Makefile:/^MEMOPS_OBJS
	-- src/Makefile:/^NOSSP_OBJS
	__init_tls='$cflags $cflags_nossp',
	__libc_start_main='$cflags $cflags_nossp',
	__set_thread_area='$cflags $cflags_nossp',
	__stack_chk_fail='$cflags $cflags_nossp',
	memcpy='$cflags $cflags_memops $cflags_nossp',
	memmove='$cflags $cflags_memops',
	memset='$cflags $cflags_memops $cflags_nossp',
	memcmp='$cflags $cflags_memops',
}
for _, src in pairs(srcs) do
	table.insert(objs, cc(src, nil, {cflags=specialcflags[src:match('([^/]*)%.[^/.]*$')]}))
end
table.sort(objs)
ar('libc.a', objs)
file('lib/libc.a', '644', '$outdir/libc.a')
exe('libc.so', {'ldso/dlstart.c', 'ldso/dynlink.c', objs}, nil, {
	cflags='$cflags $cflags_nossp',
	ldflags='$ldflags -nostdlib -shared -Wl,-e,_dlstart',
	ldlibs='-lgcc',
})
file('lib/libc.so', '755', '$outdir/libc.so')
sym('lib/ld-musl-'..arch..'.so.1', 'libc.so')
sym('bin/ldd', '../lib/libc.so')
for _, lib in ipairs{'libm.a', 'librt.a', 'libpthread.a', 'libcrypt.a', 'libutil.a', 'libxnet.a', 'libresolv.a', 'libdl.a'} do
	ar(lib, {})
	file('lib/'..lib, '644', '$outdir/'..lib)
end
local startfiles = {'$outdir/libc.a'}
for _, src in ipairs{'crt1.c', 'rcrt1.c', 'Scrt1.c', arch..'/crti.s', arch..'/crtn.s'} do
	local obj = src:gsub('.-(%w*)%.[cs]$', '%1.o')
	local out = '$outdir/'..obj
	build('cc', out, {'$srcdir/crt/'..src, '|', '$gendir/deps'}, {cflags='$cflags $cflags_nossp'})
	file('lib/'..obj, '644', out)
	table.insert(startfiles, out)
end
phony('startfiles', startfiles)
fetch 'git'