-# vim:ts=4:sw=4:expandtab:autoindent:
-#
-# The MIT License
-#
-# Copyright (c) 2008, 2009 Flusspferd contributors (see "CONTRIBUTORS" or
-# http://flusspferd.org/contributors.txt)
-#
-# Permission is hereby granted, free of charge, to any person obtaining a copy
-# of this software and associated documentation files (the "Software"), to deal
-# in the Software without restriction, including without limitation the rights
-# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-# copies of the Software, and to permit persons to whom the Software is
-# furnished to do so, subject to the following conditions:
-#
-# The above copyright notice and this permission notice shall be included in
-# all copies or substantial portions of the Software.
-#
-# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-# THE SOFTWARE.
-#
+# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
+# file Copyright.txt or https://cmake.org/licensing for details.
-Include(CheckFunctionExists)
-include(CheckCXXSourceCompiles)
+#[=======================================================================[.rst:
+FindIconv
+---------
-if(ICONV_INCLUDE_DIR)
- set(ICONV_FIND_QUIETLY TRUE)
-endif()
+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.
-find_path(ICONV_INCLUDE_DIR iconv.h
- HINTS
- ${CMAKE_PREFIX_PATH}
- ${ICONV_DIR}
- $ENV{ICONV_DIR}
- PATH_SUFFIXES include
-)
-
-if(NOT ICONV_INCLUDE_DIR STREQUAL "ICONV_INCLUDE_DIR-NOTFOUND")
- set(CMAKE_REQUIRED_INCLUDES ${ICONV_INCLUDE_DIR})
- check_function_exists(iconv_open ICONV_IN_GLIBC)
-endif()
+The following variables are provided to indicate iconv support:
-if(NOT ICONV_IN_GLIBC)
- if (CMAKE_CL_64)
- find_library(ICONV_LIBRARY
- NAMES iconv64
- HINTS
- ${CMAKE_PREFIX_PATH}
- ${ICONV_DIR}
- $ENV{ICONV_DIR}
- PATH_SUFFIXES lib64 lib
- )
- else()
- find_library(ICONV_LIBRARY
- NAMES iconv
- HINTS
- ${CMAKE_PREFIX_PATH}
- ${ICONV_DIR}
- $ENV{ICONV_DIR}
- PATH_SUFFIXES lib64 lib
- )
- endif()
- set(ICONV_TEST ${ICONV_LIBRARY})
-else()
- set(ICONV_TEST "In glibc")
-endif()
+.. variable:: ICONV_FOUND
-set(CMAKE_REQUIRED_INCLUDES ${ICONV_INCLUDE_DIR})
-set(CMAKE_REQUIRED_LIBRARIES ${ICONV_LIBRARY})
+ Variable indicating if the iconv support was found.
-if(MSVC_VERSION GREATER 1800)
- set(CMAKE_REQUIRED_LIBRARIES ${CMAKE_REQUIRED_LIBRARIES} legacy_stdio_definitions.lib)
-endif()
+.. variable:: Iconv_INCLUDE_DIRS
-check_cxx_source_compiles(
- "#include <iconv.h>
- int main() {
- iconv(iconv_t(-1), 0, 0, 0, 0);
- }"
- ICONV_COMPILES)
+ The directories containing the iconv headers.
-include(FindPackageHandleStandardArgs)
-find_package_handle_standard_args(ICONV DEFAULT_MSG ICONV_TEST ICONV_INCLUDE_DIR ICONV_COMPILES)
+.. variable:: Iconv_LIBRARIES
-if(ICONV_FOUND)
- set(ICONV_LIBRARIES ${ICONV_LIBRARY})
-else(ICONV_FOUND)
- set(ICONV_LIBRARIES)
-endif(ICONV_FOUND)
+ The iconv libraries to be linked.
-if(ICONV_FOUND)
- set(CMAKE_REQUIRED_INCLUDES ${ICONV_INCLUDE_DIR})
- set(CMAKE_REQUIRED_LIBRARIES ${ICONV_LIBRARIES})
+.. variable:: Iconv_IS_BUILT_IN
- if(MSVC_VERSION GREATER 1800)
- set(CMAKE_REQUIRED_LIBRARIES ${CMAKE_REQUIRED_LIBRARIES} legacy_stdio_definitions.lib)
- endif()
+ 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.
- if (NOT DEFINED ICONV_ACCEPTS_NONCONST_INPUT)
- # Display a useful message first time we come through here
- message(STATUS "One (and only one) of the ICONV_ACCEPTS_... tests must pass")
- endif()
- check_cxx_source_compiles(
- "#include <iconv.h>
- int main() {
- char *p = 0;
- iconv(iconv_t(-1), &p, 0, 0, 0);
- }"
- ICONV_ACCEPTS_NONCONST_INPUT)
-
- check_cxx_source_compiles(
- "#include <iconv.h>
- int main() {
- char const *p = 0;
- iconv(iconv_t(-1), &p, 0, 0, 0);
- }"
- ICONV_ACCEPTS_CONST_INPUT)
-
- if (ICONV_LIBRARY)
- list(REMOVE_ITEM CMAKE_REQUIRED_LIBRARIES ${ICONV_LIBRARY})
- list(REMOVE_DUPLICATES CMAKE_REQUIRED_LIBRARIES)
+The following cache variables may also be set:
+
+.. variable:: ICONV_INCLUDE_DIR
+
+ The directory containing the iconv headers.
+
+.. variable:: ICONV_LIBRARY
+
+ The iconv library (if not implicitly given in the C library).
+
+.. note::
+ On POSIX platforms, iconv might be part of the C library and the cache
+ variables ``ICONV_INCLUDE_DIR`` and ``ICONV_LIBRARY`` might be empty.
+
+#]=======================================================================]
+#
+# This file was modified to work in Snort build environment
+#
+
+include(CMakePushCheckState)
+if(CMAKE_C_COMPILER_LOADED)
+ include(CheckCSourceCompiles)
+elseif(CMAKE_CXX_COMPILER_LOADED)
+ include(CheckCXXSourceCompiles)
+else()
+ # If neither C nor CXX are loaded, implicit iconv makes no sense.
+ set(Iconv_IS_BUILT_IN FALSE)
+endif()
+
+# iconv can only be provided in libc on a POSIX system.
+# If any cache variable is already set, we'll skip this test.
+if(NOT DEFINED Iconv_IS_BUILT_IN)
+ if(UNIX AND NOT DEFINED ICONV_INCLUDE_DIR AND NOT DEFINED ICONV_LIBRARY)
+ cmake_push_check_state(RESET)
+ # We always suppress the message here: Otherwise on supported systems
+ # not having iconv in their C library (e.g. those using libiconv)
+ # would always display a confusing "Looking for iconv - not found" message
+ set(CMAKE_FIND_QUIETLY TRUE)
+ # The following code will not work, but it's sufficient to see if it compiles.
+ # Note: libiconv will define the iconv functions as macros, so CheckSymbolExists
+ # will not yield correct results.
+ set(Iconv_IMPLICIT_TEST_CODE
+ "
+ #include <stddef.h>
+ #include <iconv.h>
+ int main() {
+ char *a, *b;
+ size_t i, j;
+ iconv_t ic;
+ ic = iconv_open(\"to\", \"from\");
+ iconv(ic, &a, &i, &b, &j);
+ iconv_close(ic);
+ }
+ "
+ )
+ if(CMAKE_C_COMPILER_LOADED)
+ check_c_source_compiles("${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 FALSE)
+ endif()
endif()
-if(NOT ICONV_ACCEPTS_CONST_INPUT AND NOT ICONV_ACCEPTS_NONCONST_INPUT)
- MESSAGE(FATAL_ERROR "Unable to determine iconv() signature")
-elseif(ICONV_ACCEPTS_CONST_INPUT AND ICONV_ACCEPTS_NONCONST_INPUT)
- MESSAGE(FATAL_ERROR "Unable to determine iconv() signature - both test cases passed!")
+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()
-mark_as_advanced(ICONV_LIBRARY ICONV_INCLUDE_DIR)
+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(CMAKE_REQUIRED_INCLUDES ${ICONV_INCLUDE_DIR})
+ set(CMAKE_REQUIRED_LIBRARIES ${ICONV_LIBRARY})
+endif()
\ No newline at end of file
projects / thirdparty / snort3.git / commitdiff
