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boringssl.sh
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boringssl.sh
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#!/usr/bin/env bash
# Copyright (C) Viktor Szakats. See LICENSE.md
# SPDX-License-Identifier: MIT
# Requires macOS 10.13
# FIXME (upstream):
# - x64 mingw-w64 pthread ucrt static linking bug -> requires llvm-mingw
# - as of 4fe29ebc hacks are needed to avoid build issues. grep for the hash
# to find them.
# - BoringSSL also supports native-Windows threading, but it uses
# MSVC-specific hacks, thus cannot be enabled for MinGW:
# https://github.com/google/boringssl/blob/master/crypto/thread_win.c
# Possible solution:
# https://github.com/dotnet/runtime/blob/cbca5083d3e69f2bd25e397f8894d94d7763a13a/src/mono/mono/mini/mini-windows-tls-callback.c#L56
# - managed to patch BoringSSL to use native Windows threads and thus be
# able to drop pthreads. curl crashes (with or without this patch.)
# - as of 4fe29ebc, BoringSSL uses C++, so dependents must be built with
# static standard C++ library. static libunwind is also needed e.g. when
# using llvm-mingw. Integrating all of this is non-trivial. When not
# using llvm-mingw, pthreads is necessary again, but it does not trigger
# the static pthreads linking bug (undefined reference to `_setjmp') we
# hit earlier.
# - Building tests takes 3 minutes per target (on AppVeyor CI, at the time
# of this writing) and consumes 9x the disk space for ${_BLDDIR}, that is
# 32MB -> 283MB (for x64).
# Disabling them requires elaborate edits in ./CMakeList.txt.
# This is fixed in AWS-LC fork with a CMake option.
# - A test object named trampoline-x86_64.asm.obj ends up in libcrypto.a.
# - nasm includes the first 18 bytes of the HOME directory in its output.
# e.g. rdrand-x86_64.asm.obj. This only affects libcrypto.a.
# This is intentionally written into a `.file` record and --reproducible
# does not disable it. See nasm/output/outcoff.c/coff_write_symbols()
# PR: https://github.com/netwide-assembler/nasm/pull/33 [RELEASED in v2.16]
# binutils strip is able to delete it (llvm-strip is not, as of 14.0.6).
# - Objects built on different OSes result in a few byte differences.
# e.g. windows.c.obj, a_utf8.c.obj. But not a_octet.c.obj.
# https://boringssl.googlesource.com/boringssl/
# https://bugs.chromium.org/p/boringssl/issues/list
# https://chromium.googlesource.com/chromium/src/third_party/boringssl/+/c9aca35314ba018fef141535ca9d4dd39d9bc688%5E%21/
# https://chromium.googlesource.com/chromium/src/third_party/boringssl/
# https://chromium.googlesource.com/chromium/src/+/refs/heads/main/DEPS
# https://github.com/chromium/chromium/commit/6a77772b9bacdf2490948f452bdbc34d3e871be1
# https://github.com/chromium/chromium/tree/main/third_party/boringssl
# https://raw.githubusercontent.com/chromium/chromium/main/DEPS
# shellcheck disable=SC3040,SC2039
set -o xtrace -o errexit -o nounset; [ -n "${BASH:-}${ZSH_NAME:-}" ] && set -o pipefail
export _NAM _VER _OUT _BAS _DST
_NAM="$(basename "$0" | cut -f 1 -d '.')"
_VER="$1"
(
cd "${_NAM}" || exit 0
[ "${CW_DEV_INCREMENTAL:-}" != '1' ] && rm -r -f "${_PKGDIR:?}" "${_BLDDIR:?}"
CFLAGS="-ffile-prefix-map=$(pwd)="
LIBS='-lpthread' # for tests
options=''
[ "${_CPU}" = 'r64' ] && exit 1 # No support as of 2023-10
if true; then
# to avoid (as of 4fe29ebc, root cause undiscovered):
# ld.lld: error: undefined symbol: fiat_p256_adx_mul
# >>> referenced by libcrypto.a(bcm.o):(fiat_p256_mul)
# ld.lld: error: undefined symbol: fiat_p256_adx_sqr
# >>> referenced by libcrypto.a(bcm.o):(fiat_p256_square)
options+=' -DOPENSSL_NO_ASM=ON'
else
if [ "${_OS}" = 'win' ] && [ "${_CPU}" != 'a64' ]; then
# nasm is used for Windows x64 and x86
options+=' -DCMAKE_ASM_NASM_FLAGS=--reproducible'
fi
fi
# Workaround for Windows x64 llvm 16 breakage as of 85081c6b:
# In file included from ./boringssl/crypto/curve25519/curve25519_64_adx.c:17:
# ./boringssl/crypto/curve25519/../../third_party/fiat/curve25519_64_adx.h:40:11: error: call to undeclared function '_umul128'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
# *out1 = _umul128(arg1, arg2, &t);
# ^
if [ "${_OS}" = 'win' ] && [ "${_CPU}" = 'x64' ] && [ "${_CC}" = 'llvm' ]; then
options+=' -DOPENSSL_SMALL=ON'
else
options+=' -DOPENSSL_SMALL=OFF' # ON reduces curl binary sizes by ~300 KB
fi
if [ "${CW_DEV_INCREMENTAL:-}" != '1' ] || [ ! -d "${_BLDDIR}" ]; then
# Patch the build to omit debug info. This results in 50% smaller footprint
# for each ${_BLDDIR}. As of llvm 14.0.6, llvm-strip does an imperfect job
# when deleting -ggdb debug info and ends up having ~100 bytes of metadata
# different (e.g. in windows.c.obj, a_utf8.c.obj, but not a_octet.c.obj)
# across build host platforms. Fixed either by patching out this flag here,
# or by running binutils strip on the result. binutils strip do not support
# ARM64, so patch it out in that case.
# Enable it for all targets for consistency.
sed -i.bak 's/ -ggdb//g' ./CMakeLists.txt
# shellcheck disable=SC2086
cmake -B "${_BLDDIR}" ${_CMAKE_GLOBAL} ${_CMAKE_CXX_GLOBAL} ${options} \
'-DBUILD_SHARED_LIBS=OFF' \
"-DCMAKE_C_FLAGS=${_CFLAGS_GLOBAL_CMAKE} ${_CFLAGS_GLOBAL} ${_CPPFLAGS_GLOBAL} ${CFLAGS} ${_LDFLAGS_GLOBAL} ${LIBS}" \
"-DCMAKE_CXX_FLAGS=${_CFLAGS_GLOBAL_CMAKE} ${_CFLAGS_GLOBAL} ${_CPPFLAGS_GLOBAL} ${CFLAGS} ${_LDFLAGS_GLOBAL} ${LIBS} ${_CXXFLAGS_GLOBAL} ${_LDFLAGS_CXX_GLOBAL}"
fi
make --directory="${_BLDDIR}" --jobs="${_JOBS}" install "DESTDIR=$(pwd)/${_PKGDIR}" # VERBOSE=1
# List files created
find "${_PP}"
# Make steps for determinism
readonly _ref='README.md'
# FIXME: llvm-strip (as of 14.0.6) has a few bugs:
# - produces different output across build hosts after stripping libs
# compiled with -ggdb.
# - fails to strip the `.file` record from NASM objects.
# (fixed by --reproducible with nasm v2.16)
# - fails to clear timestamps in NASM objects.
# (fixed by --reproducible with nasm v2.15.05)
# Work around them by running it through binutils strip. This works for
# x64 and x86, but not for ARM64.
#
# Most combinations/orders running binutils/llvm strip over the output results
# in different output, and except pure llvm-strip, all seem to be
# deterministic. We chose to run binutils first and llvm second. This way
# llvm creates the result we publish.
#
# <strip sequence> <bytes>
# libcrypto-noggdb.a 2858080
# libcrypto-noggdb-llvm.a 2482620
# libcrypto-noggdb-llvm-binutils.a 2488078
# libcrypto-noggdb-llvm-binutils-llvm.a 2479904
# libcrypto-noggdb-llvm-binutils-llvm-binutils.a 2488078
# libcrypto-noggdb-binutils.a 2465310
# libcrypto-noggdb-binutils-llvm.a 2479888
# libcrypto-noggdb-binutils-llvm-binutils.a 2488078
# libcrypto-ggdb.a 9642542
# libcrypto-ggdb-llvm.a 2482606
# libcrypto-ggdb-llvm-binutils.a 2488066
# libcrypto-ggdb-llvm-binutils-llvm.a 2479890
# libcrypto-ggdb-llvm-binutils-llvm-binutils.a 2488066
# libcrypto-ggdb-binutils.a 2465298
# libcrypto-ggdb-binutils-llvm.a 2479874
# libcrypto-ggdb-binutils-llvm-binutils.a 2488066
# shellcheck disable=SC2086
"${_STRIP_LIB}" ${_STRIPFLAGS_LIB} "${_PP}"/lib/libssl.a
if [ -n "${_STRIP_BINUTILS}" ]; then
# FIXME: llvm-strip corrupts nasm objects as of LLVM v16.0.0
# shellcheck disable=SC2086
# "${_STRIP_LIB}" ${_STRIPFLAGS_LIB} "${_PP}"/lib/libcrypto.a
# FIXME: Use binutils strip instead, directly on objects, to avoid
# binutils strip v2.40 error `invalid operation` when run on
# the whole lib:
../_clean-lib.sh --strip "${_STRIP_BINUTILS}" "${_PP}"/lib/libcrypto.a
else
# shellcheck disable=SC2086
"${_STRIP_LIB}" ${_STRIPFLAGS_LIB} "${_PP}"/lib/libcrypto.a
fi
touch -c -r "${_ref}" "${_PP}"/include/openssl/*.h
touch -c -r "${_ref}" "${_PP}"/lib/*.a
# Create package
_OUT="${_NAM}-${_VER}${_REVSUFFIX}${_PKGSUFFIX}"
_BAS="${_NAM}-${_VER}${_PKGSUFFIX}"
_DST="$(pwd)/_pkg"; rm -r -f "${_DST}"
mkdir -p "${_DST}/include/openssl"
mkdir -p "${_DST}/lib"
cp -f -p "${_PP}"/include/openssl/*.h "${_DST}/include/openssl/"
cp -f -p "${_PP}"/lib/*.a "${_DST}/lib"
cp -f -p LICENSE "${_DST}/LICENSE.txt"
cp -f -p README.md "${_DST}/"
../_pkg.sh "$(pwd)/${_ref}"
)