1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
|
# Distributed under the OSI-approved BSD 3-Clause License.
# See accompanying file Copyright.txt or https://cmake.org/licensing for details.
#[=======================================================================[.rst:
FindAsio
--------
Finds the standalone Asio library (header-only).
Search Order
^^^^^^^^^^^^
1. Direct header search (find_path for asio.hpp)
2. pkg-config fallback (if direct search fails)
Imported Targets
^^^^^^^^^^^^^^^^
This module provides the following imported targets, if found:
``Asio::Asio``
Header-only interface library for standalone Asio.
Result Variables
^^^^^^^^^^^^^^^^
This will define the following variables:
``Asio_FOUND``
True if standalone Asio was found.
``Asio_INCLUDE_DIRS``
Include directories needed to use Asio.
``Asio_VERSION``
The version of Asio found (if detectable).
Cache Variables
^^^^^^^^^^^^^^^
The following cache variables may also be set:
``Asio_INCLUDE_DIR``
The directory containing ``asio.hpp``.
#]=======================================================================]
# Look for the main asio.hpp header
find_path(Asio_INCLUDE_DIR
NAMES asio.hpp
DOC "Standalone Asio include directory"
)
# Fallback to pkg-config if header not found directly
# This helps Linux distro users where Asio may only provide a .pc file
if(NOT Asio_INCLUDE_DIR)
find_package(PkgConfig QUIET)
if(PkgConfig_FOUND)
pkg_check_modules(_Asio QUIET asio)
if(_Asio_FOUND)
# pkg-config returns a list; use the first include directory
list(GET _Asio_INCLUDE_DIRS 0 _Asio_INCLUDE_DIR_FIRST)
set(Asio_INCLUDE_DIR "${_Asio_INCLUDE_DIR_FIRST}"
CACHE PATH "Standalone Asio include directory")
if(_Asio_VERSION)
set(Asio_VERSION "${_Asio_VERSION}")
endif()
unset(_Asio_INCLUDE_DIR_FIRST)
endif()
endif()
endif()
# Try to extract version from asio/version.hpp
if(Asio_INCLUDE_DIR AND EXISTS "${Asio_INCLUDE_DIR}/asio/version.hpp")
file(STRINGS "${Asio_INCLUDE_DIR}/asio/version.hpp" _asio_version_line
REGEX "^#define[ \t]+ASIO_VERSION[ \t]+[0-9]+")
if(_asio_version_line)
string(REGEX REPLACE "^#define[ \t]+ASIO_VERSION[ \t]+([0-9]+).*$" "\\1"
_asio_version_num "${_asio_version_line}")
# ASIO_VERSION is encoded as (major * 100000) + (minor * 100) + patch
math(EXPR _asio_major "${_asio_version_num} / 100000")
math(EXPR _asio_minor "(${_asio_version_num} / 100) % 1000")
math(EXPR _asio_patch "${_asio_version_num} % 100")
set(Asio_VERSION "${_asio_major}.${_asio_minor}.${_asio_patch}")
unset(_asio_version_num)
unset(_asio_major)
unset(_asio_minor)
unset(_asio_patch)
endif()
unset(_asio_version_line)
endif()
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(Asio
REQUIRED_VARS Asio_INCLUDE_DIR
VERSION_VAR Asio_VERSION
)
if(Asio_FOUND)
set(Asio_INCLUDE_DIRS ${Asio_INCLUDE_DIR})
if(NOT TARGET Asio::Asio)
add_library(Asio::Asio INTERFACE IMPORTED)
set_target_properties(Asio::Asio PROPERTIES
INTERFACE_INCLUDE_DIRECTORIES "${Asio_INCLUDE_DIR}"
)
endif()
endif()
mark_as_advanced(Asio_INCLUDE_DIR)
|
