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# Bootstrappable TCC is a fork from mainline TCC development
# that can be compiled by MesCC
# Build steps adapted from https://github.com/fosslinux/live-bootstrap/blob/1bc4296091c51f53a5598050c8956d16e945b0f5/sysa/tcc-0.9.26/tcc-0.9.26.kaem
#
# SPDX-FileCopyrightText: 2021-22 fosslinux <fosslinux@aussies.space>
#
# SPDX-License-Identifier: GPL-3.0-or-later
{
lib,
buildPlatform,
callPackage,
fetchurl,
kaem,
mes,
mes-libc,
}:
let
inherit (callPackage ./common.nix { }) buildTinyccMes recompileLibc;
version = "unstable-2024-07-07";
rev = "ea3900f6d5e71776c5cfabcabee317652e3a19ee";
arch =
{
i686-linux = "x86";
x86_64-linux = "x86_64";
}
.${buildPlatform.system};
tccTarget =
{
i686-linux = "I386";
x86_64-linux = "X86_64";
}
.${buildPlatform.system};
tarball = fetchurl {
url = "https://gitlab.com/janneke/tinycc/-/archive/${rev}/tinycc-${rev}.tar.gz";
sha256 = "sha256-16JBGJATAWP+lPylOi3+lojpdv0SR5pqyxOV2PiVx0A=";
};
src =
(kaem.runCommand "tinycc-bootstrappable-${version}-source" { } ''
ungz --file ${tarball} --output tinycc.tar
mkdir -p ''${out}
cd ''${out}
untar --file ''${NIX_BUILD_TOP}/tinycc.tar
# Patch
cd tinycc-${rev}
cp ${mes-libc}/lib/libtcc1.c lib/libtcc1.c
# Static link by default
replace --file libtcc.c --output libtcc.c --match-on "s->ms_extensions = 1;" --replace-with "s->ms_extensions = 1; s->static_link = 1;"
# TODO: may not need following patches for mes 0.28.
# Or maybe we don't need tinycc-bootstrappable for mes 0.28?
# mes-libc depends on max_align_t in stddef.h, which is not provided by tinycc-boot
replace --file include/stddef.h --output include/stddef.h --match-on "void *alloca" --replace-with "
typedef union { long double ld; long long ll; } max_align_t;
void *alloca
"
# VLA is broken in mescc 0.27.1. alloca is not available either. Let's just use malloc and leak on x86_64.
replace --file x86_64-gen.c --output x86_64-gen.c --match-on "char _onstack[nb_args], *onstack = _onstack;" --replace-with "char *onstack = tcc_malloc(nb_args);"
# Abort is not provided by mescc
replace --file x86_64-gen.c --output x86_64-gen.c --match-on "abort();" --replace-with "/* abort(); */"
# Work around bug in mescc.
replace --file x86_64-gen.c --output x86_64-gen.c --match-on "g(vtop->c.i & (ll ? 63 : 31));" --replace-with "if (ll) g(vtop->c.i & 63); else g(vtop->c.i & 31);"
# Normally tinycc only performs relocations on the PLT when creating a dynamically-linked executable.
# This is fine for most targets because a PLT is not generated. But on x86_64 we do generate a PLT and hence
# we must assure plt->got references are appropriately relocated.
# This patch is applied even if we aren't targeting x86_64. Because there's no PLT outside x86_64, it's basically a no-op.
replace --file tccelf.c --output tccelf.c --match-on "fill_got(s1);" --replace-with "
{
fill_got(s1);
relocate_plt(s1);
}
"
'')
+ "/tinycc-${rev}";
meta = {
description = "Tiny C Compiler's bootstrappable fork";
homepage = "https://gitlab.com/janneke/tinycc";
license = lib.licenses.lgpl21Only;
teams = [ lib.teams.minimal-bootstrap ];
platforms = [
"i686-linux"
"x86_64-linux"
];
};
pname = "tinycc-boot-mes";
tinycc-boot-mes = rec {
compiler =
kaem.runCommand "${pname}-${version}"
{
passthru.tests.get-version =
result:
kaem.runCommand "${pname}-get-version-${version}" { } ''
${result}/bin/tcc -version
mkdir ''${out}
'';
}
''
catm config.h
${mes.compiler}/bin/mes --no-auto-compile -e main ${mes.srcPost.bin}/bin/mescc.scm -- \
-S \
-o tcc.s \
-I . \
-D BOOTSTRAP=1 \
-D HAVE_LONG_LONG=${if buildPlatform.is64bit then "1" else "0"} \
-I ${src} \
-D TCC_TARGET_${tccTarget}=1 \
-D inline= \
-D CONFIG_TCCDIR=\"\" \
-D CONFIG_SYSROOT=\"\" \
-D CONFIG_TCC_CRTPREFIX=\"{B}\" \
-D CONFIG_TCC_ELFINTERP=\"/mes/loader\" \
-D CONFIG_TCC_LIBPATHS=\"{B}\" \
-D CONFIG_TCC_SYSINCLUDEPATHS=\"${src}/include:${mes-libc}/include\" \
-D TCC_LIBGCC=\"libc.a\" \
-D TCC_LIBTCC1=\"libtcc1.a\" \
-D CONFIG_TCC_LIBTCC1_MES=0 \
-D CONFIG_TCCBOOT=1 \
-D CONFIG_TCC_STATIC=1 \
-D CONFIG_USE_LIBGCC=1 \
-D TCC_MES_LIBC=1 \
-D TCC_VERSION=\"0.9.28-${version}\" \
-D ONE_SOURCE=1 \
${src}/tcc.c
mkdir -p ''${out}/bin
${mes.compiler}/bin/mes --no-auto-compile -e main ${mes.srcPost.bin}/bin/mescc.scm -- \
-L ${mes.libs}/lib \
-l c+tcc \
-o ''${out}/bin/tcc \
tcc.s
'';
libs = recompileLibc {
inherit pname version src;
tcc = compiler;
libtccOptions = mes-libc.CFLAGS + " -DTCC_TARGET_${tccTarget}=1";
};
};
# Bootstrap stage build flags obtained from
# https://gitlab.com/janneke/tinycc/-/blob/80114c4da6b17fbaabb399cc29f427e368309bc8/boot.sh
tinycc-boot0 = buildTinyccMes {
pname = "tinycc-boot0";
inherit src version meta;
prev = tinycc-boot-mes;
buildOptions = [
"-D HAVE_LONG_LONG=1"
"-D HAVE_SETJMP=1"
];
libtccBuildOptions = [
"-D HAVE_LONG_LONG=1"
"-DTCC_TARGET_${tccTarget}=1"
];
};
tinycc-boot1 = buildTinyccMes {
pname = "tinycc-boot1";
inherit src version meta;
prev = tinycc-boot0;
buildOptions = [
"-D HAVE_BITFIELD=1"
"-D HAVE_LONG_LONG=1"
"-D HAVE_SETJMP=1"
];
libtccBuildOptions = [
"-D HAVE_LONG_LONG=1"
"-DTCC_TARGET_${tccTarget}=1"
];
};
tinycc-boot2 = buildTinyccMes {
pname = "tinycc-boot2";
inherit src version meta;
prev = tinycc-boot1;
buildOptions = [
"-D HAVE_BITFIELD=1"
"-D HAVE_FLOAT_STUB=1"
"-D HAVE_LONG_LONG=1"
"-D HAVE_SETJMP=1"
];
libtccBuildOptions = [
"-D HAVE_FLOAT_STUB=1"
"-D HAVE_LONG_LONG=1"
"-DTCC_TARGET_${tccTarget}=1"
];
};
tinycc-boot3 = buildTinyccMes {
pname = "tinycc-boot3";
inherit src version meta;
prev = tinycc-boot2;
buildOptions = [
"-D HAVE_BITFIELD=1"
"-D HAVE_FLOAT=1"
"-D HAVE_LONG_LONG=1"
"-D HAVE_SETJMP=1"
];
libtccBuildOptions = [
"-D HAVE_FLOAT=1"
"-D HAVE_LONG_LONG=1"
"-DTCC_TARGET_${tccTarget}=1"
];
};
in
buildTinyccMes {
pname = "tinycc-bootstrappable";
inherit src version meta;
prev = tinycc-boot3;
buildOptions = [
"-D HAVE_BITFIELD=1"
"-D HAVE_FLOAT=1"
"-D HAVE_LONG_LONG=1"
"-D HAVE_SETJMP=1"
];
libtccBuildOptions = [
"-D HAVE_FLOAT=1"
"-D HAVE_LONG_LONG=1"
"-DTCC_TARGET_${tccTarget}=1"
];
}
|
