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# Copyright (c) 2024-present The Bitcoin Core developers
# Distributed under the MIT software license, see the accompanying
# file COPYING or https://opensource.org/license/mit/.
#[=======================================================================[
FindUSDT
--------
Finds the Userspace, Statically Defined Tracing header(s).
Imported Targets
^^^^^^^^^^^^^^^^
This module provides imported target ``USDT::headers``, if
USDT has been found.
Result Variables
^^^^^^^^^^^^^^^^
This module defines the following variables:
``USDT_FOUND``
"True" if USDT found.
#]=======================================================================]
find_path(USDT_INCLUDE_DIR
NAMES sys/sdt.h
)
mark_as_advanced(USDT_INCLUDE_DIR)
if(USDT_INCLUDE_DIR)
include(CMakePushCheckState)
cmake_push_check_state(RESET)
include(CheckCXXSourceCompiles)
set(CMAKE_REQUIRED_INCLUDES ${USDT_INCLUDE_DIR})
check_cxx_source_compiles("
#include <sys/sdt.h>
int main()
{
DTRACE_PROBE(context, event);
int a, b, c, d, e, f, g;
DTRACE_PROBE7(context, event, a, b, c, d, e, f, g);
}
" HAVE_USDT_H
)
cmake_pop_check_state()
endif()
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(USDT
REQUIRED_VARS USDT_INCLUDE_DIR HAVE_USDT_H
)
if(USDT_FOUND AND NOT TARGET USDT::headers)
add_library(USDT::headers INTERFACE IMPORTED)
set_target_properties(USDT::headers PROPERTIES
INTERFACE_INCLUDE_DIRECTORIES "${USDT_INCLUDE_DIR}"
)
set(ENABLE_TRACING TRUE)
endif()
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