[Xastir] Problems in recompiling xastir on Raspberry pi 3 including GraphicsMagick

[Menga]

Dear friends,
yoy may have followed my previous posts: Xastir on raspberrypi to SCS 
PTCIIpro for Robustpacket Radio
I was able to configure, compile, and install for the first time Xastir 
(Xastir-2.0.8) in the basic setting

(configure # Generated by GNU Autoconf 2.69 for xastir 2.0.8).
It was located in /usr/scr/xastir-2.0.8.

xastir 2.0.8 has been configured to use the following
options and external libraries:

MINIMUM OPTIONS:
  ShapeLib (Vector maps) ................. : yes (internal)

RECOMMENDED OPTIONS:
  GraphicsMagick/ImageMagick (Raster maps) : no
  pcre (Shapefile customization) ......... : no
  dbfawk (Shapefile customization) ....... : no
  rtree indexing (Shapefile speedups) .... : yes
  map caching (Raster map speedups) ...... : no
  internet map retrieval ................. : yes (wget)

FOR THE ADVENTUROUS:
  AX25 (Linux Kernel I/O Drivers) ........ : no
  libproj (USGS Topos & Aerial Photos) ... : no
  GeoTiff (USGS Topos & Aerial Photos) ... : no
  Festival (Text-to-speech) .............. : no
  GDAL/OGR (Obtuse map formats) .......... : no
  GPSMan/gpsmanshp (GPS downloads) ....... : no

Then I installed new libraries, among them shapelib  (in /usr/bin), I also 
recompiled anew and installed GraphicsMagick, with libraries located
in 
/home/pi/graphicsmagick-1.3.20/debian/graphicsmagick/usr/lib/mime/packages.
But, recompiling xastir, the situation didn't change much: no use of the new 
Shapelib, no recognition of GraphicsMagick.
The only thing I noted, not present the previous times was:
./configure: line 11040: EXEEXT: command not found (why?)

xastir 2.0.8 has been configured to use the following

options and external libraries:

MINIMUM OPTIONS:
  ShapeLib (Vector maps) ................. : yes (internal)

RECOMMENDED OPTIONS:
  GraphicsMagick/ImageMagick (Raster maps) : no
  pcre (Shapefile customization) ......... : yes
  dbfawk (Shapefile customization) ....... : yes
  rtree indexing (Shapefile speedups) .... : yes
  map caching (Raster map speedups) ...... : no
  internet map retrieval ................. : yes (libcurl)

FOR THE ADVENTUROUS:
  AX25 (Linux Kernel I/O Drivers) ........ : no
  libproj (USGS Topos & Aerial Photos) ... : yes
  GeoTiff (USGS Topos & Aerial Photos) ... : no
  Festival (Text-to-speech) .............. : no
  GDAL/OGR (Obtuse map formats) .......... : yes
  GPSMan/gpsmanshp (GPS downloads) ....... : no

May be the reason is that the configure was not able to find the path of the 
graphicsmagcs libraries.
Any suggestion?

Giuseppe
IZ1GCL