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#.rst:
# FindLTTngUST
# ------------
#
# This module finds the `LTTng-UST <http://lttng.org/>`__ library.
#
# Imported target
# ^^^^^^^^^^^^^^^
#
# This module defines the following :prop_tgt:`IMPORTED` target:
#
# ``LTTng::UST``
# The LTTng-UST library, if found
#
# Result variables
# ^^^^^^^^^^^^^^^^
#
# This module sets the following
#
# ``LTTNGUST_FOUND``
# ``TRUE`` if system has LTTng-UST
# ``LTTNGUST_INCLUDE_DIRS``
# The LTTng-UST include directories
# ``LTTNGUST_LIBRARIES``
# The libraries needed to use LTTng-UST
# ``LTTNGUST_VERSION_STRING``
# The LTTng-UST version
# ``LTTNGUST_HAS_TRACEF``
# ``TRUE`` if the ``tracef()`` API is available in the system's LTTng-UST
# ``LTTNGUST_HAS_TRACELOG``
# ``TRUE`` if the ``tracelog()`` API is available in the system's LTTng-UST
#
# SPDX-FileCopyrightText: 2016 Kitware, Inc.
# SPDX-FileCopyrightText: 2016 Philippe Proulx <pproulx@efficios.com>
#
# SPDX-License-Identifier: BSD-3-Clause
find_path(LTTNGUST_INCLUDE_DIRS NAMES lttng/tracepoint.h)
# Must also check for the path of generated header files since out-of-tree
# build is a possibility (Yocto).
find_path(LTTNGUST_INCLUDE_DIRS_GENERATED NAMES lttng/ust-config.h)
find_library(LTTNGUST_LIBRARIES NAMES lttng-ust)
if(LTTNGUST_INCLUDE_DIRS AND LTTNGUST_INCLUDE_DIRS_GENERATED AND LTTNGUST_LIBRARIES)
# find tracef() and tracelog() support
set(LTTNGUST_HAS_TRACEF 0)
set(LTTNGUST_HAS_TRACELOG 0)
if(EXISTS "${LTTNGUST_INCLUDE_DIRS}/lttng/tracef.h")
set(LTTNGUST_HAS_TRACEF TRUE)
endif()
if(EXISTS "${LTTNGUST_INCLUDE_DIRS}/lttng/tracelog.h")
set(LTTNGUST_HAS_TRACELOG TRUE)
endif()
# get version
set(lttngust_version_file "${LTTNGUST_INCLUDE_DIRS_GENERATED}/lttng/ust-version.h")
if(EXISTS "${lttngust_version_file}")
file(STRINGS "${lttngust_version_file}" lttngust_version_major_string
REGEX "^[\t ]*#define[\t ]+LTTNG_UST_MAJOR_VERSION[\t ]+[0-9]+[\t ]*$")
file(STRINGS "${lttngust_version_file}" lttngust_version_minor_string
REGEX "^[\t ]*#define[\t ]+LTTNG_UST_MINOR_VERSION[\t ]+[0-9]+[\t ]*$")
file(STRINGS "${lttngust_version_file}" lttngust_version_patch_string
REGEX "^[\t ]*#define[\t ]+LTTNG_UST_PATCHLEVEL_VERSION[\t ]+[0-9]+[\t ]*$")
string(REGEX REPLACE ".*([0-9]+).*" "\\1"
lttngust_v_major "${lttngust_version_major_string}")
string(REGEX REPLACE ".*([0-9]+).*" "\\1"
lttngust_v_minor "${lttngust_version_minor_string}")
string(REGEX REPLACE ".*([0-9]+).*" "\\1"
lttngust_v_patch "${lttngust_version_patch_string}")
set(LTTNGUST_VERSION_STRING
"${lttngust_v_major}.${lttngust_v_minor}.${lttngust_v_patch}")
unset(lttngust_version_major_string)
unset(lttngust_version_minor_string)
unset(lttngust_version_patch_string)
unset(lttngust_v_major)
unset(lttngust_v_minor)
unset(lttngust_v_patch)
else()
message(FATAL_ERROR "Missing version header")
endif()
unset(lttngust_version_file)
if(NOT TARGET LTTng::UST)
add_library(LTTng::UST UNKNOWN IMPORTED)
set_target_properties(LTTng::UST PROPERTIES
INTERFACE_INCLUDE_DIRECTORIES "${LTTNGUST_INCLUDE_DIRS};${LTTNGUST_INCLUDE_DIRS_GENERATED}"
INTERFACE_LINK_LIBRARIES ${CMAKE_DL_LIBS}
IMPORTED_LINK_INTERFACE_LANGUAGES "C"
IMPORTED_LOCATION "${LTTNGUST_LIBRARIES}")
endif()
# add libdl to required libraries
set(LTTNGUST_LIBRARIES ${LTTNGUST_LIBRARIES} ${CMAKE_DL_LIBS})
endif()
# handle the QUIETLY and REQUIRED arguments and set LTTNGUST_FOUND to
# TRUE if all listed variables are TRUE
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(LTTngUST FOUND_VAR LTTNGUST_FOUND
REQUIRED_VARS LTTNGUST_LIBRARIES
LTTNGUST_INCLUDE_DIRS
VERSION_VAR LTTNGUST_VERSION_STRING)
mark_as_advanced(LTTNGUST_LIBRARIES LTTNGUST_INCLUDE_DIRS)
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