mirror of
https://github.com/JGRennison/OpenTTD-patches.git
synced 2024-11-04 06:00:15 +00:00
134 lines
4.1 KiB
CMake
134 lines
4.1 KiB
CMake
# 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()
|