Is it intentional that the cmake port still installs a custom version of FindIconv.cmake? This can cause problems because this it misses the 'IMPORTED target' provided by cmake's original version of FindIconv.cmake, see: https://cmake.org/cmake/help/v3.16/module/FindIconv.html
I guess the attached diff does not break anything, but I can't tell for sure..
Index: Makefile =================================================================== RCS file: /cvs/ports/devel/cmake/Makefile,v retrieving revision 1.183 diff -u -p -u -p -r1.183 Makefile --- Makefile 30 Mar 2020 20:12:38 -0000 1.183 +++ Makefile 31 Mar 2020 17:23:52 -0000 @@ -8,7 +8,7 @@ VER = 3.16.2 EPOCH = 0 DISTNAME = cmake-${VER} CATEGORIES = devel -REVISION = 1 +REVISION = 2 HOMEPAGE = https://www.cmake.org/ Index: files/FindIconv.cmake =================================================================== RCS file: files/FindIconv.cmake diff -N files/FindIconv.cmake --- files/FindIconv.cmake 15 Jun 2012 10:26:56 -0000 1.4 +++ /dev/null 1 Jan 1970 00:00:00 -0000 @@ -1,58 +0,0 @@ -# - Try to find Iconv -# Once done this will define -# -# ICONV_FOUND - system has Iconv -# ICONV_INCLUDE_DIR - the Iconv include directory -# ICONV_LIBRARIES - Link these to use Iconv -# ICONV_SECOND_ARGUMENT_IS_CONST - the second argument for iconv() is const -# -include(CheckCXXSourceCompiles) - -IF (ICONV_INCLUDE_DIR AND ICONV_LIBRARIES) - # Already in cache, be silent - SET(ICONV_FIND_QUIETLY TRUE) -ENDIF (ICONV_INCLUDE_DIR AND ICONV_LIBRARIES) - -FIND_PATH(ICONV_INCLUDE_DIR iconv.h) - -FIND_LIBRARY(ICONV_LIBRARIES NAMES iconv libiconv libiconv-2 c) - -IF(ICONV_INCLUDE_DIR AND ICONV_LIBRARIES) - SET(ICONV_FOUND TRUE) -ENDIF(ICONV_INCLUDE_DIR AND ICONV_LIBRARIES) - -set(CMAKE_REQUIRED_INCLUDES ${ICONV_INCLUDE_DIR}) -set(CMAKE_REQUIRED_LIBRARIES ${ICONV_LIBRARIES}) -IF(ICONV_FOUND) - 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 ) -ENDIF(ICONV_FOUND) -set(CMAKE_REQUIRED_INCLUDES) -set(CMAKE_REQUIRED_LIBRARIES) - -IF(ICONV_FOUND) - IF(NOT ICONV_FIND_QUIETLY) - MESSAGE(STATUS "Found Iconv: ${ICONV_LIBRARIES}") - ENDIF(NOT ICONV_FIND_QUIETLY) -ELSE(ICONV_FOUND) - IF(Iconv_FIND_REQUIRED) - MESSAGE(FATAL_ERROR "Could not find Iconv") - ENDIF(Iconv_FIND_REQUIRED) -ENDIF(ICONV_FOUND) - -MARK_AS_ADVANCED( - ICONV_INCLUDE_DIR - ICONV_LIBRARIES - ICONV_SECOND_ARGUMENT_IS_CONST -) -