curl/CMake/FindLibuv.cmake
Viktor Szakats aafc074f87
cmake: clear package version after pkg-config detection
`pkg_check_modules()` seems to leave `<PACKAGE>_VERSION` defined with an
empty value, if the package is not found.

When the package is also not found in the fallback branch,
`find_package_handle_standard_args()` logs and error message. In this
message it includes the bogus empty value as: `(found version "")`:
```
Could NOT find Libssh2 (missing: LIBSSH2_INCLUDE_DIR LIBSSH2_LIBRARY) (found version "")
```
https://github.com/curl/curl/actions/runs/11509727553/job/32040378958?pr=15408#step:31:99

Clear the version number to avoid the confusion:
```
Could NOT find Libssh2 (missing: LIBSSH2_INCLUDE_DIR LIBSSH2_LIBRARY)
```
https://github.com/curl/curl/actions/runs/11510022503/job/32041149129?pr=15408#step:31:99

Seen with CMake v3.30.5.

Follow-up to 7bab201abe #15193
Closes #15409
2024-10-25 15:04:35 +02:00

90 lines
3.4 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 libuv library
#
# Input variables:
#
# - `LIBUV_INCLUDE_DIR`: The libuv include directory.
# - `LIBUV_LIBRARY`: Path to `libuv` library.
#
# Result variables:
#
# - `LIBUV_FOUND`: System has libuv.
# - `LIBUV_INCLUDE_DIRS`: The libuv include directories.
# - `LIBUV_LIBRARIES`: The libuv library names.
# - `LIBUV_LIBRARY_DIRS`: The libuv library directories.
# - `LIBUV_CFLAGS`: Required compiler flags.
# - `LIBUV_VERSION`: Version of libuv.
if(CURL_USE_PKGCONFIG AND
NOT DEFINED LIBUV_INCLUDE_DIR AND
NOT DEFINED LIBUV_LIBRARY)
find_package(PkgConfig QUIET)
pkg_check_modules(LIBUV "libuv")
endif()
if(LIBUV_FOUND)
string(REPLACE ";" " " LIBUV_CFLAGS "${LIBUV_CFLAGS}")
message(STATUS "Found Libuv (via pkg-config): ${LIBUV_INCLUDE_DIRS} (found version \"${LIBUV_VERSION}\")")
else()
find_path(LIBUV_INCLUDE_DIR NAMES "uv.h")
find_library(LIBUV_LIBRARY NAMES "uv" "libuv")
unset(LIBUV_VERSION CACHE)
if(LIBUV_INCLUDE_DIR AND EXISTS "${LIBUV_INCLUDE_DIR}/uv/version.h")
set(_version_regex1 "#[\t ]*define[\t ]+UV_VERSION_MAJOR[\t ]+([0-9]+).*")
set(_version_regex2 "#[\t ]*define[\t ]+UV_VERSION_MINOR[\t ]+([0-9]+).*")
set(_version_regex3 "#[\t ]*define[\t ]+UV_VERSION_PATCH[\t ]+([0-9]+).*")
file(STRINGS "${LIBUV_INCLUDE_DIR}/uv/version.h" _version_str1 REGEX "${_version_regex1}")
file(STRINGS "${LIBUV_INCLUDE_DIR}/uv/version.h" _version_str2 REGEX "${_version_regex2}")
file(STRINGS "${LIBUV_INCLUDE_DIR}/uv/version.h" _version_str3 REGEX "${_version_regex3}")
string(REGEX REPLACE "${_version_regex1}" "\\1" _version_str1 "${_version_str1}")
string(REGEX REPLACE "${_version_regex2}" "\\1" _version_str2 "${_version_str2}")
string(REGEX REPLACE "${_version_regex3}" "\\1" _version_str3 "${_version_str3}")
set(LIBUV_VERSION "${_version_str1}.${_version_str2}.${_version_str3}")
unset(_version_regex1)
unset(_version_regex2)
unset(_version_regex3)
unset(_version_str1)
unset(_version_str2)
unset(_version_str3)
endif()
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(Libuv
REQUIRED_VARS
LIBUV_INCLUDE_DIR
LIBUV_LIBRARY
VERSION_VAR
LIBUV_VERSION
)
if(LIBUV_FOUND)
set(LIBUV_INCLUDE_DIRS ${LIBUV_INCLUDE_DIR})
set(LIBUV_LIBRARIES ${LIBUV_LIBRARY})
endif()
mark_as_advanced(LIBUV_INCLUDE_DIR LIBUV_LIBRARY)
endif()