-# 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.
-
-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)
+# Find the headers and library required for iconv functions.
+# Libc-based iconv test lifted from the upstream CMake FindIconv.cmake module.
+
+# First, try to find the iconv header, looking in the hinted directory first.
+find_path(ICONV_INCLUDE_DIR
+ NAMES iconv.h
+ HINTS ${ICONV_INCLUDE_DIR_HINT}
+)
+
+if (ICONV_INCLUDE_DIR)
+ # Test to see if iconv is available from libc and matches the header we found.
+ # Assume that an explicit include dir or library dir hint means we're not going
+ # to be using a libc implementation.
+ if (UNIX AND NOT ICONV_INCLUDE_DIR_HINT AND NOT ICONV_LIBRARIES_DIR_HINT)
+ include(CMakePushCheckState)
+ cmake_push_check_state(RESET)
+ # Make sure we're using the iconv.h we found above
+ set(CMAKE_REQUIRED_INCLUDES ${ICONV_INCLUDE_DIR})
+ # We always suppress the message here: Otherwise on supported systems
+ # not having iconv in their C library (e.g. those using libiconv)
+ # would always display a confusing "Looking for iconv - not found" message
+ set(CMAKE_FIND_QUIETLY TRUE)
+ # The following code will not work, but it's sufficient to see if it compiles.
+ # Note: libiconv will define the iconv functions as macros, so CheckSymbolExists
+ # will not yield correct results.
+ set(ICONV_IMPLICIT_TEST_CODE
+ "
+ #include <stddef.h>
+ #include <iconv.h>
+ int main() {
+ char *a, *b;
+ size_t i, j;
+ iconv_t ic;
+ ic = iconv_open(\"to\", \"from\");
+ iconv(ic, &a, &i, &b, &j);
+ iconv_close(ic);
+ }
+ "
+ )
+ if (CMAKE_C_COMPILER_LOADED)
+ include(CheckCSourceCompiles)
+ check_c_source_compiles("${ICONV_IMPLICIT_TEST_CODE}" ICONV_IS_BUILT_IN)
+ elseif (CMAKE_CXX_COMPILER_LOADED)
+ include(CheckCXXSourceCompiles)
+ check_cxx_source_compiles("${ICONV_IMPLICIT_TEST_CODE}" ICONV_IS_BUILT_IN)
+ endif()
+ cmake_pop_check_state()
endif()
- cmake_pop_check_state()
- else()
- set(Iconv_IS_BUILT_IN FALSE)
- 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")
+ if (NOT ICONV_IS_BUILT_IN)
+ find_library(ICONV_LIBRARY
+ NAMES iconv libiconv
+ HINTS ${ICONV_LIBRARIES_DIR_HINT}
+ )
+ endif()
else()
- set(ICONV_INCLUDE_DIR "" CACHE FILEPATH "iconv include directory")
- set(Iconv_LIBRARY_NAMES "c")
+ unset(ICONV_INCLUDE_DIR)
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)
+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)
+ find_package_handle_standard_args(ICONV REQUIRED_VARS ICONV_INCLUDE_DIR)
endif()
-if(ICONV_FOUND)
- set(CMAKE_REQUIRED_INCLUDES ${ICONV_INCLUDE_DIR})
- set(CMAKE_REQUIRED_LIBRARIES ${ICONV_LIBRARY})
-endif()
\ No newline at end of file
+mark_as_advanced(ICONV_INCLUDE_DIR)
+mark_as_advanced(ICONV_LIBRARY)
+
projects / thirdparty / snort3.git / commitdiff
