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10 April 2024, 19:27:19 UTC
Revision d9a6e0ffc82fbc460289c6b0808eff27ac316235 authored by Craig Scott on 10 September 2022, 08:22:18 UTC, committed by Craig Scott on 10 September 2022, 08:23:21 UTC 
FetchContent: Fix unsetting wrong variable name after provider returns
 
The unset() command was using __cmake_contentNameLower before that
variable was restored from the __cmake_fcCurrentVarsStack. That means
if there had been a nested call to FetchContent_MakeAvailable(), the wrong
variable name would have been cleared (the nested name instead of the
one from the current call). That would have left the variable set upon return,
blocking the dependency provider from seeing any further calls to
FetchContent_MakeAvailable() in the current variable scope or below for the
current dependency.
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Tip revision: d9a6e0ffc82fbc460289c6b0808eff27ac316235 authored by Craig Scott on 10 September 2022, 08:22:18 UTC
FetchContent: Fix unsetting wrong variable name after provider returns
Tip revision: d9a6e0f
FindALSA.cmake 
# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
# file Copyright.txt or https://cmake.org/licensing for details.

#[=======================================================================[.rst:
FindALSA
--------

Find Advanced Linux Sound Architecture (ALSA)

Find the alsa libraries (``asound``)

IMPORTED Targets
^^^^^^^^^^^^^^^^

.. versionadded:: 3.12

This module defines :prop_tgt:`IMPORTED` target ``ALSA::ALSA``, if
ALSA has been found.

Result Variables
^^^^^^^^^^^^^^^^

This module defines the following variables:

``ALSA_FOUND``
  True if ALSA_INCLUDE_DIR & ALSA_LIBRARY are found

``ALSA_LIBRARIES``
  List of libraries when using ALSA.

``ALSA_INCLUDE_DIRS``
  Where to find the ALSA headers.

Cache variables
^^^^^^^^^^^^^^^

The following cache variables may also be set:

``ALSA_INCLUDE_DIR``
  the ALSA include directory

``ALSA_LIBRARY``
  the absolute path of the asound library
#]=======================================================================]

find_path(ALSA_INCLUDE_DIR NAMES alsa/asoundlib.h
          DOC "The ALSA (asound) include directory"
)

find_library(ALSA_LIBRARY NAMES asound
          DOC "The ALSA (asound) library"
)

if(ALSA_INCLUDE_DIR AND EXISTS "${ALSA_INCLUDE_DIR}/alsa/version.h")
  file(STRINGS "${ALSA_INCLUDE_DIR}/alsa/version.h" alsa_version_str REGEX "^#define[\t ]+SND_LIB_VERSION_STR[\t ]+\".*\"")

  string(REGEX REPLACE "^.*SND_LIB_VERSION_STR[\t ]+\"([^\"]*)\".*$" "\\1" ALSA_VERSION_STRING "${alsa_version_str}")
  unset(alsa_version_str)
endif()

include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake)
FIND_PACKAGE_HANDLE_STANDARD_ARGS(ALSA
                                  REQUIRED_VARS ALSA_LIBRARY ALSA_INCLUDE_DIR
                                  VERSION_VAR ALSA_VERSION_STRING)

if(ALSA_FOUND)
  set( ALSA_LIBRARIES ${ALSA_LIBRARY} )
  set( ALSA_INCLUDE_DIRS ${ALSA_INCLUDE_DIR} )
  if(NOT TARGET ALSA::ALSA)
    add_library(ALSA::ALSA UNKNOWN IMPORTED)
    set_target_properties(ALSA::ALSA PROPERTIES INTERFACE_INCLUDE_DIRECTORIES "${ALSA_INCLUDE_DIRS}")
    set_property(TARGET ALSA::ALSA APPEND PROPERTY IMPORTED_LOCATION "${ALSA_LIBRARY}")
  endif()
endif()

mark_as_advanced(ALSA_INCLUDE_DIR ALSA_LIBRARY)
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