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transmission/cmake/FindICONV.cmake
Charles Kerr 4c1b627647
refactor: port libtransmission to C++ (#1787)
Port libtransmission to C++. This PR doesn't refactor everything to c++.
Its code changes are only what was necessary to compile and link as c++.
See libtransmission/README.md for details on how to submit modernization 
patches!

Co-authored-by: Mike Gelfand <mikedld@mikedld.com>
2021-09-12 12:41:49 -05:00

48 lines
1.4 KiB
CMake

# Grabbed from http://public.kitware.com/Bug/view.php?id=13517 and slightly modified.
find_path(ICONV_INCLUDE_DIR iconv.h)
find_library(ICONV_LIBRARY NAMES iconv libiconv libiconv-2 c)
set(ICONV_INCLUDE_DIRS ${ICONV_INCLUDE_DIR})
set(ICONV_LIBRARIES ${ICONV_LIBRARY})
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(ICONV
REQUIRED_VARS
ICONV_LIBRARY
ICONV_INCLUDE_DIR
VERSION_VAR
ICONV_VERSION
)
if(ICONV_FOUND AND NOT DEFINED ICONV_SECOND_ARGUMENT_IS_CONST)
include(CheckCXXSourceCompiles)
set(CMAKE_REQUIRED_INCLUDES ${ICONV_INCLUDE_DIRS})
set(CMAKE_REQUIRED_LIBRARIES ${ICONV_LIBRARIES})
check_cxx_source_compiles("
#include <iconv.h>
int main()
{
iconv_t conv = 0;
const char * in = 0;
size_t ilen = 0;
char * out = 0;
size_t olen = 0;
iconv(conv, &in, &ilen, &out, &olen);
return 0;
}"
ICONV_SECOND_ARGUMENT_IS_CONST
FAIL_REGEX "discards qualifiers in nested pointer types"
FAIL_REGEX "incompatible pointer type"
FAIL_REGEX "invalid conversion"
FAIL_REGEX "no matching function"
)
set(CMAKE_REQUIRED_INCLUDES)
set(CMAKE_REQUIRED_LIBRARIES)
endif()
mark_as_advanced(ICONV_INCLUDE_DIR ICONV_LIBRARY ICONV_SECOND_ARGUMENT_IS_CONST)