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cmake: tidy up and document feature detections in dependencies

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- update text on dependency feature detection variables, and move it
  to its own section in `docs/INSTALL-CMAKE.md`.
  Ref: #17032 (Discussion)

- tidy up descriptions/comments, alpha-sort.

- move comment to its own section in `docs/INSTALL-CMAKE.md`.

- split `HAVE_SSL_SET_QUIC_USE_LEGACY_CODEPOINT` to distinct names for
  each TLS backend API. To make the names more stable and to sync them
  with autotools.
  Follow-up to 07cc50f8eb #17018
  Follow-up to 342a654ef3 #15873

- drop redundant condition while detecting QUICTLS API.
  Follow-up to 07cc50f8eb #17018

- add config-comparison exception for `HAVE_SSL_SET_QUIC_TLS_CBS`.
  Follow-up to 5eefdd71a3 #17027

- detect `wolfSSL_get_peer_certificate` like autotools does.

- detect `wolfSSL_UseALPN` like autotools does.

Closes #17082
This commit is contained in:
Viktor Szakats 2025-04-17 10:07:30 +02:00
parent 7bf576064c
commit 4bfc379b90
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4 changed files with 61 additions and 31 deletions
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48
CMakeLists.txt
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@ -23,26 +23,6 @@
###########################################################################
# by Tetetest and Sukender (Benoit Neil)
# Note: By default this CMake build script detects the version of some
# dependencies using `check_symbol_exists`. Those checks do not work in
# the case that both CURL and its dependency are included as sub-projects
# in a larger build using `FetchContent`. To support that case, additional
# variables may be defined by the parent project, ideally in the "extra"
# find package redirect file:
# https://cmake.org/cmake/help/latest/module/FetchContent.html#integrating-with-find-package
#
# The following variables are available:
# HAVE_SSL_SET0_WBIO: `SSL_set0_wbio` present in OpenSSL
# HAVE_OPENSSL_SRP: `SSL_CTX_set_srp_username` present in OpenSSL
# HAVE_GNUTLS_SRP: `gnutls_srp_verifier` present in GnuTLS
# HAVE_SSL_SET_QUIC_USE_LEGACY_CODEPOINT: `SSL_set_quic_use_legacy_codepoint` present in OpenSSL/wolfSSL
# HAVE_QUICHE_CONN_SET_QLOG_FD: `quiche_conn_set_qlog_fd` present in quiche
# HAVE_ECH: ECH API checks for OpenSSL, BoringSSL, wolfSSL or rustls-ffi
#
# For each of the above variables, if the variable is DEFINED (either
# to ON or OFF), the symbol detection is skipped. If the variable is
# NOT DEFINED, the symbol detection is performed.
cmake_minimum_required(VERSION 3.7...3.16 FATAL_ERROR)
message(STATUS "Using CMake version ${CMAKE_VERSION}")
@ -1048,26 +1028,32 @@ macro(curl_openssl_check_exists)
cmake_pop_check_state()
endmacro()
# Ensure that the OpenSSL fork actually supports QUIC.
# Ensure that OpenSSL (or fork) or wolfSSL actually supports QUICTLS API.
macro(curl_openssl_check_quic)
if(NOT DEFINED HAVE_SSL_SET_QUIC_USE_LEGACY_CODEPOINT)
if(USE_OPENSSL AND NOT USE_OPENSSL_QUIC)
if(OPENSSL_VERSION VERSION_GREATER_EQUAL 3.5.0 AND NOT USE_OPENSSL_QUIC)
curl_openssl_check_exists("SSL_set_quic_tls_cbs" HAVE_SSL_SET_QUIC_USE_LEGACY_CODEPOINT)
else()
if(USE_OPENSSL AND NOT USE_OPENSSL_QUIC)
if(OPENSSL_VERSION VERSION_GREATER_EQUAL 3.5.0)
if(NOT DEFINED HAVE_SSL_SET_QUIC_TLS_CBS)
curl_openssl_check_exists("SSL_set_quic_tls_cbs" HAVE_SSL_SET_QUIC_TLS_CBS)
endif()
else()
if(NOT DEFINED HAVE_SSL_SET_QUIC_USE_LEGACY_CODEPOINT)
curl_openssl_check_exists("SSL_set_quic_use_legacy_codepoint" HAVE_SSL_SET_QUIC_USE_LEGACY_CODEPOINT)
endif()
endif()
if(USE_WOLFSSL)
curl_openssl_check_exists("wolfSSL_set_quic_use_legacy_codepoint" HAVE_SSL_SET_QUIC_USE_LEGACY_CODEPOINT)
endif()
endif()
if(NOT HAVE_SSL_SET_QUIC_USE_LEGACY_CODEPOINT)
message(FATAL_ERROR "QUIC support is missing in OpenSSL fork. Try setting -DOPENSSL_ROOT_DIR")
if(USE_WOLFSSL AND NOT DEFINED HAVE_WOLFSSL_SET_QUIC_USE_LEGACY_CODEPOINT)
curl_openssl_check_exists("wolfSSL_set_quic_use_legacy_codepoint" HAVE_WOLFSSL_SET_QUIC_USE_LEGACY_CODEPOINT)
endif()
if(NOT HAVE_SSL_SET_QUIC_TLS_CBS AND
NOT HAVE_SSL_SET_QUIC_USE_LEGACY_CODEPOINT AND
NOT HAVE_WOLFSSL_SET_QUIC_USE_LEGACY_CODEPOINT)
message(FATAL_ERROR "QUICTLS API support is missing from OpenSSL/fork/wolfSSL. Try setting -DOPENSSL_ROOT_DIR")
endif()
endmacro()
if(USE_WOLFSSL)
curl_openssl_check_exists("wolfSSL_get_peer_certificate" HAVE_WOLFSSL_GET_PEER_CERTIFICATE)
curl_openssl_check_exists("wolfSSL_UseALPN" HAVE_WOLFSSL_USEALPN)
curl_openssl_check_exists("wolfSSL_DES_ecb_encrypt" HAVE_WOLFSSL_DES_ECB_ENCRYPT)
curl_openssl_check_exists("wolfSSL_BIO_new" HAVE_WOLFSSL_BIO)
curl_openssl_check_exists("wolfSSL_BIO_set_shutdown" HAVE_WOLFSSL_FULL_BIO)