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jak-project/third-party/curl/CMake/Utilities.cmake
T
Alexander J. Semenuk 5d5e35fb9b fix: Windows toolchain compatibility (curl 8.21 re-vendor, endless reconfigure loop) (#4355)
## Problem

Windows builds break with a current local toolchain (Scoop LLVM 22.1.8,
CMake 4.4.0, VS 2026), in two independent ways:

1. The build stops at curl's deliberate guard: `#error "no non-blocking
method was found/used/set"` in `third-party/curl/lib/nonblock.c`.
2. From the second configure onward, `cmake --build` re-runs CMake in an
endless loop (observed 42 consecutive reconfigure cycles in a single
build). Likely the same mechanism behind the "endlessly building" VS
2026 note in `docs/setup/dev/vs.md`.

## Root cause

1. `third-party/curl/CMake/CurlTests.c` passes `int *` to
`ioctlsocket()`, whose third parameter is `u_long *`. Clang 22 promotes
`-Wincompatible-pointer-types` to a hard error in C, so the
`HAVE_IOCTLSOCKET_FIONBIO` try_compile silently fails and
`curl_config.h` never defines it. Upstream CI does not see this because
the windows-2022 runner image ships an older LLVM. GCC 14 promotes the
same warning to a hard error, which is very likely the `CurlTests.c.obj`
failure reported from MSYS2 in open-goal/jak-project#3551. Upstream curl
hit the identical problem with GCC 14 and fixed the probe in curl 8.8.0
(curl/curl#13578).
2. The root CMakeLists copies the build tree's `compile_commands.json`
into `<src>/build/` for clangd using `configure_file()`, which registers
its input as a configure dependency. CMake rewrites
`compile_commands.json` late in every generation, after
`CTestTestfile.cmake` and `cmake_install.cmake` (outputs of the same
Ninja regen rule), so once the dependency is registered the rule is
deterministically dirty and every `ninja` invocation re-runs CMake. A
pristine first configure is safe (the file does not exist yet, so the
`if(EXISTS ...)` guard skips the copy), which is why the loop looks
machine- or IDE-specific.

## Fix

1. Per review, re-vendor `third-party/curl` at the `curl-8_21_0` tag
(previously `curl-8_3_0`), which carries the upstream probe fix plus two
years of upstream development; `vendor.yaml` updated to match.
Adjustments the version jump forced:
- curl 8.15 removed the native macOS Secure Transport backend
(`CURL_USE_SECTRANSP`), so macOS now builds curl against OpenSSL like
Linux. The two macOS workflows install Homebrew `openssl@3` and export
`OPENSSL_ROOT_DIR` (keg-only), and the macOS setup docs gained the same
two lines.
- `CURL_BROTLI` / `CURL_ZSTD` switched to AUTO-detection in curl 8.10;
pinned OFF to keep the previous no-compression behavior and avoid
silently linking whatever the CI images happen to have.
- curl's new top-level `BUILD_EXAMPLES` cache option (default ON) leaked
into discord-rpc's identically named option and broke configure at a
nonexistent `examples/send-presence` directory; pinned OFF ahead of the
third-party subdirectories.

The diff is dominated by the mechanical tag-tree swap under
`third-party/curl` (linguist-vendored, collapsed in review). The
hand-written changes are `CMakeLists.txt`, the two macOS workflows,
`docs/setup/system/macos.md`, and `vendor.yaml`.
2. Swap `configure_file()` for `file(COPY ...)`: the same clangd copy
with no configure dependency registered. (`file(COPY_FILE ...
ONLY_IF_DIFFERENT)` would be cleaner still but requires CMake 3.21,
above the declared `cmake_minimum_required(VERSION 3.10)`.)

## Test plan

- [x] Fresh `cmake --preset Release-windows-clang` (LLVM 22, no cache
seeding) completes and logs `Enabled SSL backends: Schannel`; the
FIONBIO probe passes without the previous `#error`
- [x] Full Windows Release build from scratch in the branch worktree
(all 1422 targets)
- [x] goalc-test suite: 1509 passed, 0 failed
- [x] Second consecutive configure with `compile_commands.json` present:
the regen rule in `build.ninja` has no `compile_commands.json` input;
`<src>/build/compile_commands.json` is still refreshed for clangd
- [x] Repeated `ninja` invocations after a full build no longer re-run
CMake
- [x] macOS Intel and ARM CI green (first exercise of the OpenSSL
backend switch)

---

I work off a self-hosted forge, so this GitHub account is quiet; the
configure logs and ninja dirty-node traces from the investigation are
available if anyone wants the raw data.

(AI-assisted)
2026-07-27 19:19:18 -04:00

87 lines
3.4 KiB
CMake
Vendored
Generated

#***************************************************************************
# _ _ ____ _
# 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
#
###########################################################################
# File containing various utilities
# Return number of arguments that evaluate to true
function(curl_count_true _output_count_var)
set(_list_len 0)
foreach(_option_var IN LISTS ARGN)
if(${_option_var})
math(EXPR _list_len "${_list_len} + 1")
endif()
endforeach()
set(${_output_count_var} ${_list_len} PARENT_SCOPE)
endfunction()
# Dump all defined variables with their values
function(curl_dumpvars)
message("::group::CMake Variable Dump")
get_cmake_property(_vars VARIABLES)
foreach(_var IN ITEMS ${_vars})
get_property(_var_type CACHE ${_var} PROPERTY TYPE)
get_property(_var_advanced CACHE ${_var} PROPERTY ADVANCED)
if(_var_type)
set(_var_type ":${_var_type}")
endif()
if(_var_advanced)
set(_var_advanced " [adv]")
endif()
message("${_var}${_var_type}${_var_advanced} = '${${_var}}'")
endforeach()
message("::endgroup::")
endfunction()
# Dump all target properties
function(curl_dumptargetprops _target)
if(CMAKE_VERSION VERSION_GREATER_EQUAL 3.19 AND TARGET "${_target}")
execute_process(COMMAND "${CMAKE_COMMAND}" "--help-property-list" OUTPUT_VARIABLE _cmake_property_list)
string(REPLACE "\n" ";" _cmake_property_list "${_cmake_property_list}")
list(REMOVE_DUPLICATES _cmake_property_list)
list(REMOVE_ITEM _cmake_property_list "")
list(APPEND _cmake_property_list "INTERFACE_LIBCURL_PC_MODULES")
get_target_property(_target_imported ${_target} IMPORTED)
if(NOT _target_imported)
list(REMOVE_ITEM _cmake_property_list "LOCATION" "LOCATION_<CONFIG>" "MACOSX_PACKAGE_LOCATION" "VS_DEPLOYMENT_LOCATION")
endif()
foreach(_prop IN LISTS _cmake_property_list)
if(_prop MATCHES "<CONFIG>")
foreach(_config IN ITEMS "DEBUG" "RELEASE" "MINSIZEREL" "RELWITHDEBINFO")
string(REPLACE "<CONFIG>" "${_config}" _propconfig "${_prop}")
get_property(_is_set TARGET "${_target}" PROPERTY "${_propconfig}" SET)
if(_is_set)
get_target_property(_val "${_target}" "${_propconfig}")
message("${_target}.${_propconfig} = '${_val}'")
endif()
endforeach()
else()
get_property(_is_set TARGET "${_target}" PROPERTY "${_prop}" SET)
if(_is_set)
get_target_property(_val "${_target}" "${_prop}")
message("${_target}.${_prop} = '${_val}'")
endif()
endif()
endforeach()
endif()
endfunction()