curl/CMake/FindBrotli.cmake
Viktor Szakats 39c741b7b0
cmake: add native pkg-config detection for remaining Find modules
brotli, c-ares, libpsl, libssh2, nghttp2, nghttp3, ntgcp2, zstd.

Also:

Add workaround for CMake reporting successful libssh2 detection, but
leaving the header directory empty, and causing `libssh2.h` not found
while compiling. It happens when `pkgconf` is not detecting libssh2
dependency libcrypto in Homebrew after `brew unlink openssl` (as in
GHA/macos). The workaround is to require a non-empty header directory
to consider the detection successful. This workaround may need to be
tweaked and/or applied to other Find modules.

Follow-up to 7bab201abe #15193

Closes #15408
2024-12-17 02:30:55 +01:00

78 lines
2.9 KiB
CMake

#***************************************************************************
# _ _ ____ _
# 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
#
###########################################################################
# Find the brotli library
#
# Input variables:
#
# - `BROTLI_INCLUDE_DIR`: The brotli include directory.
# - `BROTLICOMMON_LIBRARY`: Path to `brotlicommon` library.
# - `BROTLIDEC_LIBRARY`: Path to `brotlidec` library.
#
# Result variables:
#
# - `BROTLI_FOUND`: System has brotli.
# - `BROTLI_INCLUDE_DIRS`: The brotli include directories.
# - `BROTLI_LIBRARIES`: The brotli library names.
# - `BROTLI_LIBRARY_DIRS`: The brotli library directories.
# - `BROTLI_CFLAGS`: Required compiler flags.
# - `BROTLI_VERSION`: Version of brotli.
if(CURL_USE_PKGCONFIG AND
NOT DEFINED BROTLI_INCLUDE_DIR AND
NOT DEFINED BROTLICOMMON_LIBRARY AND
NOT DEFINED BROTLIDEC_LIBRARY)
find_package(PkgConfig QUIET)
pkg_check_modules(BROTLI "libbrotlicommon")
pkg_check_modules(BROTLIDEC "libbrotlidec")
endif()
if(BROTLI_FOUND AND BROTLIDEC_FOUND)
list(APPEND BROTLIDEC_LIBRARIES ${BROTLI_LIBRARIES}) # order is significant: brotlidec then brotlicommon
list(REVERSE BROTLIDEC_LIBRARIES)
list(REMOVE_DUPLICATES BROTLIDEC_LIBRARIES)
list(REVERSE BROTLIDEC_LIBRARIES)
set(BROTLI_LIBRARIES ${BROTLIDEC_LIBRARIES})
string(REPLACE ";" " " BROTLI_CFLAGS "${BROTLI_CFLAGS}")
message(STATUS "Found Brotli (via pkg-config): ${BROTLI_INCLUDE_DIRS} (found version \"${BROTLI_VERSION}\")")
else()
find_path(BROTLI_INCLUDE_DIR "brotli/decode.h")
find_library(BROTLICOMMON_LIBRARY NAMES "brotlicommon")
find_library(BROTLIDEC_LIBRARY NAMES "brotlidec")
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(Brotli
REQUIRED_VARS
BROTLI_INCLUDE_DIR
BROTLIDEC_LIBRARY
BROTLICOMMON_LIBRARY
)
if(BROTLI_FOUND)
set(BROTLI_INCLUDE_DIRS ${BROTLI_INCLUDE_DIR})
set(BROTLI_LIBRARIES ${BROTLIDEC_LIBRARY} ${BROTLICOMMON_LIBRARY})
endif()
mark_as_advanced(BROTLI_INCLUDE_DIR BROTLIDEC_LIBRARY BROTLICOMMON_LIBRARY)
endif()