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Location: cpp/openttd-patchpack/source/cmake/FindIconv.cmake
r27919:cd30b76e8b60
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text/x-cmake
Fix: also apply cargo filters on shared groups in vehicle listing (#11294)
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 | # Distributed under the OSI-approved BSD 3-Clause License. See accompanying
# file Copyright.txt or https://cmake.org/licensing for details.
#[=======================================================================[.rst:
FindIconv
---------
This module finds the ``iconv()`` POSIX.1 functions on the system.
These functions might be provided in the regular C library or externally
in the form of an additional library.
The following variables are provided to indicate iconv support:
.. variable:: Iconv_FOUND
Variable indicating if the iconv support was found.
.. variable:: Iconv_INCLUDE_DIRS
The directories containing the iconv headers.
.. variable:: Iconv_LIBRARIES
The iconv libraries to be linked.
.. variable:: Iconv_IS_BUILT_IN
A variable indicating whether iconv support is stemming from the
C library or not. Even if the C library provides `iconv()`, the presence of
an external `libiconv` implementation might lead to this being false.
Additionally, the following :prop_tgt:`IMPORTED` target is being provided:
.. variable:: Iconv::Iconv
Imported target for using iconv.
The following cache variables may also be set:
.. variable:: Iconv_INCLUDE_DIR
The directory containing the iconv headers.
.. variable:: Iconv_LIBRARY
The iconv library (if not implicitly given in the C library).
.. note::
On POSIX platforms, iconv might be part of the C library and the cache
variables ``Iconv_INCLUDE_DIR`` and ``Iconv_LIBRARY`` might be empty.
#]=======================================================================]
include(CMakePushCheckState)
if(CMAKE_C_COMPILER_LOADED)
include(CheckCSourceCompiles)
elseif(CMAKE_CXX_COMPILER_LOADED)
include(CheckCXXSourceCompiles)
else()
# If neither C nor CXX are loaded, implicit iconv makes no sense.
set(Iconv_IS_BUILT_IN NO)
endif()
# iconv can only be provided in libc on a POSIX system.
# If any cache variable is already set, we'll skip this test.
if(NOT DEFINED Iconv_IS_BUILT_IN)
if(UNIX AND NOT DEFINED Iconv_INCLUDE_DIR AND NOT DEFINED Iconv_LIBRARY)
cmake_push_check_state(RESET)
# We always suppress the message here: Otherwise on supported systems
# not having iconv in their C library (e.g. those using libiconv)
# would always display a confusing "Looking for iconv - not found" message
set(CMAKE_FIND_QUIETLY TRUE)
# The following code will not work, but it's sufficient to see if it compiles.
# Note: libiconv will define the iconv functions as macros, so CheckSymbolExists
# will not yield correct results.
set(Iconv_IMPLICIT_TEST_CODE
"
#include <stddef.h>
#include <iconv.h>
int main() {
char *a, *b;
size_t i, j;
iconv_t ic;
ic = iconv_open(\"to\", \"from\");
iconv(ic, &a, &i, &b, &j);
iconv_close(ic);
}
"
)
if(CMAKE_C_COMPILER_LOADED)
check_c_source_compiles("${Iconv_IMPLICIT_TEST_CODE}" Iconv_IS_BUILT_IN)
else()
check_cxx_source_compiles("${Iconv_IMPLICIT_TEST_CODE}" Iconv_IS_BUILT_IN)
endif()
cmake_pop_check_state()
else()
set(Iconv_IS_BUILT_IN NO)
endif()
endif()
if(NOT Iconv_IS_BUILT_IN)
find_path(Iconv_INCLUDE_DIR
NAMES "iconv.h"
DOC "iconv include directory")
set(Iconv_LIBRARY_NAMES "iconv" "libiconv")
else()
set(Iconv_INCLUDE_DIR "" CACHE FILEPATH "iconv include directory")
set(Iconv_LIBRARY_NAMES "c")
endif()
find_library(Iconv_LIBRARY
NAMES ${Iconv_LIBRARY_NAMES}
DOC "iconv library (potentially the C library)")
mark_as_advanced(Iconv_INCLUDE_DIR)
mark_as_advanced(Iconv_LIBRARY)
include(FindPackageHandleStandardArgs)
if(NOT Iconv_IS_BUILT_IN)
find_package_handle_standard_args(Iconv REQUIRED_VARS Iconv_LIBRARY Iconv_INCLUDE_DIR)
else()
find_package_handle_standard_args(Iconv REQUIRED_VARS Iconv_LIBRARY)
endif()
if(Iconv_FOUND)
set(Iconv_INCLUDE_DIRS "${Iconv_INCLUDE_DIR}")
set(Iconv_LIBRARIES "${Iconv_LIBRARY}")
if(NOT TARGET Iconv::Iconv)
add_library(Iconv::Iconv INTERFACE IMPORTED)
endif()
set_property(TARGET Iconv::Iconv PROPERTY INTERFACE_INCLUDE_DIRECTORIES "${Iconv_INCLUDE_DIRS}")
set_property(TARGET Iconv::Iconv PROPERTY INTERFACE_LINK_LIBRARIES "${Iconv_LIBRARIES}")
endif()
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