curl/appveyor.sh
Viktor Szakats 66ad54e46b
cmake: add CURL_DROP_UNUSED option to reduce binary sizes
To enable known linker options dropping unused, dead, code and data from
the executables built.

Useful to reduce binary sizes for curl, libcurl shared lib and apps
linking static libcurl. It's effective on both "unity" and non-unity
builds. Aligning "unity" build sizes with default, non-unity ones.

Supported platforms: Apple, MSVC, llvm/clang and GCC on all tested
platforms: Linux, BSDs, Windows, MSYS2/Cygwin, Android, MS-DOS.

Notes:
- Static libraries grow 20-30% with non-Apple toolchains.
  This effect is controlled by separate, optional compiler flags on
  non-Apple. This patch enables them automatically for public binaries
  (libcurl and curl tool), and leaves them off for internal/test ones.
- MSVC enables this option by default for 'Release' configurations.
  The curl build option has no effect on it.
- Observed effect on VS2010 is negligible. VS2012+ is recommended.
- Works with LTO, Fil-C.
- No observed/conclusive effect on build speed.
- On Windows with clang/gcc (mingw-w64/MSYS2/Cygwin) it also enables
  `-fno-asynchronous-unwind-tables` as a workaround to make
  the toolchain options actually work.
  Ref: https://sourceware.org/bugzilla/show_bug.cgi?id=11539
  Thanks-to: Andarwinux

Also:
- GHA: enable in Linux and MinGW jobs to test it. Size changes:

  - linux aws-lc H3:
    curl: 2000000 -> 1937152, libcurl.a: 2065724 -> 2716532 bytes
  - macos clang HTTP-only:
    curl: 1364376 -> 128799 bytes, libcurl.a: unchanged
  - macos llvm MultiSSL:
    curl: 410056 -> 405720, libcurl.dylib: 1350336 -> 1348480 bytes
  - mingw schannel c-ares U:
    curl: 1588736 -> 1507328, libcurl-d.a: 3322040 -> 3884746 bytes
    bld: 34 -> 35MB

- GHA: enable in MSVC and Apple jobs to reduce disk footprint, with no
  obvious downside. Size changes:

  - AppVeyor CI VS2019:
    curl: 2339840 -> 1295872, libcurl-d.dll: 3155968 -> 1900544 bytes
    bld: 161 -> 97MB
  - AppVeyor CI VS2022 clang-cl:
    curl: 2933248 -> 2332160, libcurl-d.lib: 4762688 -> 5511330 bytes
    bld: 133 -> 121MB
  - AppVeyor CI VS2022 HTTP-only:
    curl: 3514368 -> 2177024, libcurl-d.lib: 2538420 -> 3151740 bytes
    bld: 137 -> 83MB
  - GHA intel:
    curl: 2629120 -> 2023424, libcurl-d.lib: 4366652 -> 5350670 bytes
    bld: 86 -> 69MB
  - GHA arm64:
    curl: 2832896 -> 2063872, libcurl-d.lib: 4690616 -> 5597250 bytes
    bld: 82 -> 66MB

Refs:
https://maskray.me/blog/2021-02-28-linker-garbage-collection
https://web.archive.org/web/20110811230637/msdn.microsoft.com/en-us/library/bxwfs976.aspx (VS2010)
https://learn.microsoft.com/cpp/build/reference/opt-optimizations
https://learn.microsoft.com/cpp/build/reference/gy-enable-function-level-linking

Closes #20357
2026-01-22 17:08:20 +01:00

144 lines
5.6 KiB
Bash

#!/usr/bin/env bash
#***************************************************************************
# _ _ ____ _
# Project ___| | | | _ \| |
# / __| | | | |_) | |
# | (__| |_| | _ <| |___
# \___|\___/|_| \_\_____|
#
# Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
#
# This software is licensed as described in the file COPYING, which
# you should have received as part of this distribution. The terms
# are also available at https://curl.se/docs/copyright.html.
#
# You may opt to use, copy, modify, merge, publish, distribute and/or sell
# copies of the Software, and permit persons to whom the Software is
# furnished to do so, under the terms of the COPYING file.
#
# This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
# KIND, either express or implied.
#
# SPDX-License-Identifier: curl
#
###########################################################################
# shellcheck disable=SC3040,SC2039
set -eux; [ -n "${BASH:-}${ZSH_NAME:-}" ] && set -o pipefail
# build
if [ -n "${CMAKE_GENERATOR:-}" ]; then
PRJ_CFG='Debug'
[[ "${APPVEYOR_JOB_NAME}" = *'Release'* ]] && PRJ_CFG='Release'
# Configure OpenSSL
case "${CMAKE_GENERATE:-}" in
*Win32*) openssl_suffix='-Win32';;
*) openssl_suffix='-Win64';;
esac
if [ "${APPVEYOR_BUILD_WORKER_IMAGE}" = 'Visual Studio 2022' ]; then
openssl_root_win="C:/OpenSSL-v35${openssl_suffix}"
openssl_root="$(cygpath "${openssl_root_win}")"
elif [ "${APPVEYOR_BUILD_WORKER_IMAGE}" = 'Visual Studio 2019' ]; then
openssl_root_win="C:/OpenSSL-v30${openssl_suffix}"
openssl_root="$(cygpath "${openssl_root_win}")"
fi
# Install custom cmake version
if [ -n "${CMAKE_VERSION:-}" ]; then
cmake_ver=$(printf '%02d%02d' \
"$(echo "${CMAKE_VERSION}" | cut -f1 -d.)" \
"$(echo "${CMAKE_VERSION}" | cut -f2 -d.)")
if [ "${cmake_ver}" -ge '0320' ]; then
fn="cmake-${CMAKE_VERSION}-windows-x86_64"
else
fn="cmake-${CMAKE_VERSION}-win64-x64"
fi
curl --disable --fail --silent --show-error --connect-timeout 15 --max-time 60 --retry 3 --retry-connrefused \
--location "https://github.com/Kitware/CMake/releases/download/v${CMAKE_VERSION}/${fn}.zip" --output bin.zip
7z x -y bin.zip >/dev/null
rm -f bin.zip
PATH="$PWD/${fn}/bin:$PATH"
fi
# Set env CHKPREFILL to the value '_chkprefill' to compare feature detection
# results with and without the pre-fill feature. They have to match.
for _chkprefill in '' ${CHKPREFILL:-}; do
options=''
[ "${_chkprefill}" = '_chkprefill' ] && options+=' -D_CURL_PREFILL=OFF'
[[ "${CMAKE_GENERATE:-}" = *'-A ARM64'* ]] && SKIP_RUN='ARM64 architecture'
[[ "${CMAKE_GENERATE:-}" = *'-DCURL_USE_OPENSSL=ON'* ]] && options+=" -DOPENSSL_ROOT_DIR=${openssl_root_win}"
if [ "${APPVEYOR_BUILD_WORKER_IMAGE}" = 'Visual Studio 2013' ]; then
mkdir "_bld${_chkprefill}"
cd "_bld${_chkprefill}"
options+=' ..'
root='..'
else
options+=" -B _bld${_chkprefill}"
options+=' -DCMAKE_VS_GLOBALS=TrackFileAccess=false'
options+=' -DCMAKE_UNITY_BUILD=ON'
root='.'
fi
# CMAKE_GENERATOR env requires CMake 3.15+, pass it manually to make it work with older versions.
# shellcheck disable=SC2086
time cmake -G "${CMAKE_GENERATOR}" \
-DENABLE_DEBUG=ON -DCURL_WERROR=ON \
-DCURL_STATIC_CRT=ON \
-DCURL_DROP_UNUSED=ON \
-DCURL_USE_SCHANNEL=ON -DCURL_USE_LIBPSL=OFF \
${CMAKE_GENERATE:-} \
${options} \
|| { cat "${root}"/_bld/CMakeFiles/CMake* 2>/dev/null; false; }
[ "${APPVEYOR_BUILD_WORKER_IMAGE}" = 'Visual Studio 2013' ] && cd ..
done
if [ -d _bld_chkprefill ] && ! diff -u _bld/lib/curl_config.h _bld_chkprefill/lib/curl_config.h; then
cat _bld_chkprefill/CMakeFiles/CMake* 2>/dev/null || true
false
fi
echo 'curl_config.h'; grep -F '#define' _bld/lib/curl_config.h | sort || true
time cmake --build _bld --config "${PRJ_CFG}" --parallel 2
[[ "${CMAKE_GENERATE:-}" != *'-DBUILD_SHARED_LIBS=OFF'* ]] && PATH="$PWD/_bld/lib/${PRJ_CFG}:$PATH"
[[ "${CMAKE_GENERATE:-}" = *'-DCURL_USE_OPENSSL=ON'* ]] && { PATH="${openssl_root}:$PATH"; cp "${openssl_root}"/*.dll "_bld/src/${PRJ_CFG}"; }
curl="_bld/src/${PRJ_CFG}/curl.exe"
else
(
cd projects/Windows
./generate.bat "${VC_VERSION}"
msbuild.exe -maxcpucount "-property:Configuration=${PRJ_CFG}" "-property:Platform=${PLAT}" "${VC_VERSION}/curl-all.sln"
)
[ "${PLAT}" = 'x64' ] && platdir='Win64' || platdir='Win32'
[[ "${PRJ_CFG}" = *'Debug'* ]] && binsuffix='d' || binsuffix=''
curl="build/${platdir}/${VC_VERSION}/${PRJ_CFG}/curl${binsuffix}.exe"
fi
find . \( -name '*.exe' -o -name '*.dll' -o -name '*.lib' -o -name '*.pdb' \) -print0 | grep -z curl | xargs -0 file --
find . \( -name '*.exe' -o -name '*.dll' -o -name '*.lib' -o -name '*.pdb' \) -print0 | grep -z curl | xargs -0 stat -c '%10s bytes: %n' --
if [ -z "${SKIP_RUN:-}" ]; then
"${curl}" --disable --version
else
echo "Skip running curl.exe. Reason: ${SKIP_RUN}"
fi
# build tests
if [ -n "${CMAKE_GENERATOR:-}" ] && [[ "${APPVEYOR_JOB_NAME}" = *'Build-tests'* ]]; then
time cmake --build _bld --config "${PRJ_CFG}" --parallel 2 --target testdeps
fi
# build examples
if [ -n "${CMAKE_GENERATOR:-}" ] && [[ "${APPVEYOR_JOB_NAME}" = *'examples'* ]]; then
time cmake --build _bld --config "${PRJ_CFG}" --parallel 2 --target curl-examples-build
fi
# disk space used
du -sh .; echo; du -sh -t 250KB ./*
if [ -n "${CMAKE_GENERATOR:-}" ]; then
echo; du -h -t 250KB _bld
fi