iconv support

ports/spatialite-tools/fix-linux-configure.patch

@@ -1,24 +1,33 @@
 diff --git a/configure.ac b/configure.ac
-index ff15f2922..c254b3619 100644
+index ff15f2922..268b55ff9 100644
 --- a/configure.ac
 +++ b/configure.ac
-@@ -142,6 +142,7 @@ fi
+@@ -17,6 +17,8 @@ AH_TEMPLATE([OMIT_FREEXL],
+             [Should be defined in order to disable FREEXL support.])
+ AH_TEMPLATE([OMIT_READOSM],
+             [Should be defined in order to disable ReadOSM support.])
++AH_TEMPLATE([OMIT_ICONV],
++            [Should be defined in order to disable ICONV support.])
+ AH_TEMPLATE([ENABLE_LIBXML2],
+             [Should be defined in order to enable LIBXML2 support.])
+ AH_TEMPLATE([ENABLE_MINIZIP],
+@@ -142,6 +144,7 @@ fi
  AC_ARG_WITH([geosconfig],
        [AS_HELP_STRING([--with-geosconfig=FILE], [specify an alternative geos-config file])],
  	[GEOSCONFIG="$withval"], [GEOSCONFIG=""])
 +if 0; then
  if test "x$GEOSCONFIG" = "x"; then
        # GEOSCONFIG was not specified, so search within the current path
        AC_PATH_PROG([GEOSCONFIG], [geos-config])	
-@@ -164,6 +165,7 @@ fi
+@@ -164,6 +167,7 @@ fi
  # Extract the linker and include flags
  GEOS_LDFLAGS=`$GEOSCONFIG --ldflags`
  GEOS_CPPFLAGS=-I`$GEOSCONFIG --includes`
 +fi
  AC_SUBST([GEOS_LDFLAGS])
  AC_SUBST([GEOS_CPPFLAGS])	
  # Ensure that we can parse geos_c.h
-@@ -172,11 +174,14 @@ CPPFLAGS="$GEOS_CPPFLAGS"
+@@ -172,11 +176,14 @@ CPPFLAGS="$GEOS_CPPFLAGS"
  AC_CHECK_HEADERS([geos_c.h],, [AC_MSG_ERROR([could not find geos_c.h - you may need to specify the directory of a geos-config file using --with-geosconfig])])
  CPPFLAGS="$CPPFLAGS_SAVE"	
  # Ensure we can link against libgeos_c
@@ -33,3 +42,28 @@ index ff15f2922..c254b3619 100644
 
  PKG_CHECK_MODULES([LIBSPATIALITE], [spatialite], , AC_MSG_ERROR(['libspatialite' is required but it doesn't seem to be installed on this system.]))
  AC_SUBST(LIBSPATIALITE_CFLAGS)
+@@ -218,6 +225,24 @@ fi
+
+ AM_CONDITIONAL([NO_READOSM], [test "$NOREADOSM" = "true"])
+
++#-----------------------------------------------------------------------
++#   --enable-iconv
++#
++AC_ARG_ENABLE(iconv, [AS_HELP_STRING(
++  [--enable-iconv], [enables ICONV inclusion [default=yes]])],
++  [], [enable_iconv=yes])
++if test x"$enable_iconv" != "xno"; then
++  AC_CHECK_HEADERS(iconv.h,, [AC_MSG_ERROR([cannot find iconv.h, bailing out])])
++# on some systems "iconv()" lives in libc. On others it lives in libiconv
++#  on older systems "libiconv()" lives in libiconv
++  AC_SEARCH_LIBS(iconv,iconv,,
++    AC_SEARCH_LIBS(libiconv,iconv,,AC_MSG_ERROR(['libiconv' is required but it doesn't seem to be installed on this system.]),))
++  AC_SEARCH_LIBS(locale_charset,charset,,
++    AC_SEARCH_LIBS(nl_langinfo,c,,AC_MSG_ERROR(['libcharset' is required but it doesn't seem to be installed on this system.]),))
++else
++  AC_DEFINE(OMIT_ICONV)
++fi
++
+ #-----------------------------------------------------------------------
+ #   --enable-libxml2
+ #

ports/spatialite-tools/portfile.cmake

@@ -110,11 +110,11 @@ elseif (VCPKG_TARGET_IS_LINUX OR VCPKG_TARGET_IS_OSX) # Build in UNIX
   endif()
 
   list(APPEND OPTIONS_RELEASE
-      "LIBXML2_LIBS=-lxml2 -llzma -liconv"
+      "LIBXML2_LIBS=-lxml2 -llzma"
       "GEOS_LDFLAGS=-lgeos_c -lgeos"
   )
   list(APPEND OPTIONS_DEBUG
-      "LIBXML2_LIBS=-lxml2 -llzmad -liconv"
+      "LIBXML2_LIBS=-lxml2 -llzmad"
       "GEOS_LDFLAGS=-lgeos_cd -lgeosd"
   )