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aafc074f87
`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
80 lines
2.8 KiB
CMake
80 lines
2.8 KiB
CMake
#***************************************************************************
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# _ _ ____ _
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# Project ___| | | | _ \| |
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# / __| | | | |_) | |
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# | (__| |_| | _ <| |___
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# \___|\___/|_| \_\_____|
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#
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# Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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#
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# This software is licensed as described in the file COPYING, which
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# you should have received as part of this distribution. The terms
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# are also available at https://curl.se/docs/copyright.html.
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#
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# You may opt to use, copy, modify, merge, publish, distribute and/or sell
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# copies of the Software, and permit persons to whom the Software is
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# furnished to do so, under the terms of the COPYING file.
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#
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# This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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# KIND, either express or implied.
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#
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# SPDX-License-Identifier: curl
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#
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###########################################################################
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# Find the libidn2 library
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#
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# Input variables:
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#
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# - `LIBIDN2_INCLUDE_DIR`: The libidn2 include directory.
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# - `LIBIDN2_LIBRARY`: Path to `libidn2` library.
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#
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# Result variables:
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#
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# - `LIBIDN2_FOUND`: System has libidn2.
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# - `LIBIDN2_INCLUDE_DIRS`: The libidn2 include directories.
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# - `LIBIDN2_LIBRARIES`: The libidn2 library names.
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# - `LIBIDN2_LIBRARY_DIRS`: The libidn2 library directories.
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# - `LIBIDN2_CFLAGS`: Required compiler flags.
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# - `LIBIDN2_VERSION`: Version of libidn2.
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if(CURL_USE_PKGCONFIG AND
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NOT DEFINED LIBIDN2_INCLUDE_DIR AND
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NOT DEFINED LIBIDN2_LIBRARY)
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find_package(PkgConfig QUIET)
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pkg_check_modules(LIBIDN2 "libidn2")
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endif()
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if(LIBIDN2_FOUND)
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string(REPLACE ";" " " LIBIDN2_CFLAGS "${LIBIDN2_CFLAGS}")
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message(STATUS "Found Libidn2 (via pkg-config): ${LIBIDN2_INCLUDE_DIRS} (found version \"${LIBIDN2_VERSION}\")")
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else()
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find_path(LIBIDN2_INCLUDE_DIR NAMES "idn2.h")
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find_library(LIBIDN2_LIBRARY NAMES "idn2" "libidn2")
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unset(LIBIDN2_VERSION CACHE)
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if(LIBIDN2_INCLUDE_DIR AND EXISTS "${LIBIDN2_INCLUDE_DIR}/idn2.h")
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set(_version_regex "#[\t ]*define[\t ]+IDN2_VERSION[\t ]+\"([^\"]*)\"")
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file(STRINGS "${LIBIDN2_INCLUDE_DIR}/idn2.h" _version_str REGEX "${_version_regex}")
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string(REGEX REPLACE "${_version_regex}" "\\1" _version_str "${_version_str}")
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set(LIBIDN2_VERSION "${_version_str}")
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unset(_version_regex)
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unset(_version_str)
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endif()
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include(FindPackageHandleStandardArgs)
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find_package_handle_standard_args(Libidn2
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REQUIRED_VARS
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LIBIDN2_INCLUDE_DIR
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LIBIDN2_LIBRARY
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VERSION_VAR
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LIBIDN2_VERSION
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)
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if(LIBIDN2_FOUND)
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set(LIBIDN2_INCLUDE_DIRS ${LIBIDN2_INCLUDE_DIR})
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set(LIBIDN2_LIBRARIES ${LIBIDN2_LIBRARY})
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endif()
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mark_as_advanced(LIBIDN2_INCLUDE_DIR LIBIDN2_LIBRARY)
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endif()
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