[MacPorts] #58450: MacPorts installed cmake gives incoherent results

[MacPorts]

#58450: MacPorts installed cmake gives incoherent results
--------------------+--------------------
 Reporter:  sandym  |      Owner:  (none)
     Type:  defect  |     Status:  new
 Priority:  Normal  |  Milestone:
Component:  ports   |    Version:
 Keywords:  cmake   |       Port:  cmake
--------------------+--------------------
 use the following CMakeLists.txt:

 {{{
 cmake_minimum_required(VERSION 3.12)

 find_path(ICONV_HEADER NAMES "iconv.h")
 message("ICONV_HEADER = ${ICONV_HEADER}")
 find_library(ICONV_LIB NAMES "iconv" "libiconv")
 message("ICONV_LIB = ${ICONV_LIB}")

 add_executable(main main.cpp)
 }}}

 using macports' cmake it will output:
 {{{
 ICONV_HEADER = /opt/local/include
 ICONV_LIB = /usr/lib/libiconv.dylib
 }}}

 using cmake downloaded from cmake.org:
 {{{
 ICONV_HEADER =
 /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/include
 ICONV_LIB = /usr/lib/libiconv.dylib
 }}}

 MacPorts one gives the project an inconsistent header / library pair (that
 will fail to link in the iconv case).

-- 
Ticket URL: <https://trac.macports.org/ticket/58450>
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