I have this lines

/* Enable GNU extensions on systems that have them.  */
#ifndef _GNU_SOURCE
# define _GNU_SOURCE 1
#endif

> El 28 nov 2019, a las 12:22, Dr. Jürgen Sauermann 
> <m...@xn--jrgen-sauermann-zvb.de> escribió:
> 
> Hi again,
> 
> another thing that you may want to check is that your config.h (which is
> generated by ./configure) contains the following lines:
> 
> /* Enable GNU extensions on systems that have them.  */
> #ifndef _GNU_SOURCE
> # define _GNU_SOURCE 1
> #endif
> 
> Best Regards,
> Jürgen
> 
> 
> On 11/28/19 12:11 PM, Dr. Jürgen Sauermann wrote:
>> Hi Antonio,
>> 
>> that seems to be an incompatibility between the commonly used libs and the 
>> Apple libs.
>> Nothing that I could (or should) do anything about in GNU APL. As far as I 
>> can see you could
>> probably remove the  POLLRDHUP without much harm so that the offending line 
>> reads:
>> 
>> pfd.events = POLLIN;
>> 
>> Best Regards,
>> Jürgen
>> 
>> 
>> On 11/28/19 11:58 AM, Antonio Juan wrote:
>>> Hi thanks, I thinks that will be important to put the output of this things:
>>> 
>>> ➜ svn co http://svn.savannah.gnu.org/svn/apl/trunk 
>>> <http://svn.savannah.gnu.org/svn/apl/trunk> gnu-apl
>>> ...
>>> ...
>>> A    gnu-apl/install-sh
>>> Checked out revision 1206.
>>> 
>>> ➜ export 
>>> PKG_CONFIG_PATH=/usr/local/Cellar/gtk+/2.24.32_3/lib/pkgconfig:/opt/X11/lib/pkgconfig:/usr/local/Cellar/cairo/1.16.0_2/lib/pkgconfig
>>> 
>>> ➜ ./configure
>>> checking for gcc... gcc
>>> checking whether the C compiler works... yes
>>> checking for C compiler default output file name... a.out
>>> checking for suffix of executables...
>>> checking whether we are cross compiling... no
>>> checking for suffix of object files... o
>>> checking whether we are using the GNU C compiler... yes
>>> checking whether gcc accepts -g... yes
>>> checking for gcc option to accept ISO C89... none needed
>>> checking whether gcc understands -c and -o together... yes
>>> checking how to run the C preprocessor... gcc -E
>>> checking for grep that handles long lines and -e... /usr/local/bin/ggrep
>>> checking for egrep... /usr/local/bin/ggrep -E
>>> checking for ANSI C header files... yes
>>> checking for sys/types.h... yes
>>> checking for sys/stat.h... yes
>>> checking for stdlib.h... yes
>>> checking for string.h... yes
>>> checking for memory.h... yes
>>> checking for strings.h... yes
>>> checking for inttypes.h... yes
>>> checking for stdint.h... yes
>>> checking for unistd.h... yes
>>> checking minix/config.h usability... no
>>> checking minix/config.h presence... no
>>> checking for minix/config.h... no
>>> checking whether it is safe to define __EXTENSIONS__... yes
>>> checking for a BSD-compatible install... /usr/local/bin/ginstall -c
>>> checking whether build environment is sane... yes
>>> checking for a thread-safe mkdir -p... /usr/local/bin/gmkdir -p
>>> checking for gawk... gawk
>>> checking whether make sets $(MAKE)... yes
>>> checking for style of include used by make... GNU
>>> checking whether make supports nested variables... yes
>>> checking dependency style of gcc... gcc3
>>> checking whether to enable maintainer-specific portions of Makefiles... no
>>> checking build system type... x86_64-apple-darwin19.0.0
>>> checking host system type... x86_64-apple-darwin19.0.0
>>> checking how to print strings... printf
>>> checking for a sed that does not truncate output... /usr/local/bin/gsed
>>> checking for fgrep... /usr/local/bin/ggrep -F
>>> checking for ld used by gcc... 
>>> /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld
>>> checking if the linker 
>>> (/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld)
>>>  is GNU ld... no
>>> checking for BSD- or MS-compatible name lister (nm)... /usr/bin/nm -B
>>> checking the name lister (/usr/bin/nm -B) interface... BSD nm
>>> checking whether ln -s works... yes
>>> checking the maximum length of command line arguments... 196608
>>> checking whether the shell understands some XSI constructs... yes
>>> checking whether the shell understands "+="... yes
>>> checking how to convert x86_64-apple-darwin19.0.0 file names to 
>>> x86_64-apple-darwin19.0.0 format... func_convert_file_noop
>>> checking how to convert x86_64-apple-darwin19.0.0 file names to toolchain 
>>> format... func_convert_file_noop
>>> checking for 
>>> /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld
>>>  option to reload object files... -r
>>> checking for objdump... objdump
>>> checking how to recognize dependent libraries... pass_all
>>> checking for dlltool... no
>>> checking how to associate runtime and link libraries... printf %s\n
>>> checking for g++... g++
>>> checking whether we are using the GNU C++ compiler... yes
>>> checking whether g++ accepts -g... yes
>>> checking dependency style of g++... gcc3
>>> checking for ar... ar
>>> checking for archiver @FILE support... no
>>> checking for strip... strip
>>> checking for ranlib... ranlib
>>> checking command to parse /usr/bin/nm -B output from gcc object... ok
>>> checking for sysroot... no
>>> checking for mt... no
>>> checking if : is a manifest tool... no
>>> checking for dsymutil... dsymutil
>>> checking for nmedit... nmedit
>>> checking for lipo... lipo
>>> checking for otool... otool
>>> checking for otool64... no
>>> checking for -single_module linker flag... yes
>>> checking for -exported_symbols_list linker flag... yes
>>> checking for -force_load linker flag... yes
>>> checking for dlfcn.h... yes
>>> checking for objdir... .libs
>>> checking if gcc supports -fno-rtti -fno-exceptions... yes
>>> checking for gcc option to produce PIC... -fno-common -DPIC
>>> checking if gcc PIC flag -fno-common -DPIC works... yes
>>> checking if gcc static flag -static works... no
>>> checking if gcc supports -c -o file.o... yes
>>> checking if gcc supports -c -o file.o... (cached) yes
>>> checking whether the gcc linker 
>>> (/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld)
>>>  supports shared libraries... yes
>>> checking dynamic linker characteristics... darwin19.0.0 dyld
>>> checking how to hardcode library paths into programs... immediate
>>> checking for dlopen in -ldl... yes
>>> checking whether a program can dlopen itself... yes
>>> checking whether a statically linked program can dlopen itself... yes
>>> checking whether stripping libraries is possible... yes
>>> checking if libtool supports shared libraries... yes
>>> checking whether to build shared libraries... yes
>>> checking whether to build static libraries... yes
>>> checking how to run the C++ preprocessor... g++ -E
>>> checking for ld used by g++... 
>>> /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld
>>> checking if the linker 
>>> (/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld)
>>>  is GNU ld... no
>>> checking whether the g++ linker 
>>> (/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld)
>>>  supports shared libraries... yes
>>> checking for g++ option to produce PIC... -fno-common -DPIC
>>> checking if g++ PIC flag -fno-common -DPIC works... yes
>>> checking if g++ static flag -static works... no
>>> checking if g++ supports -c -o file.o... yes
>>> checking if g++ supports -c -o file.o... (cached) yes
>>> checking whether the g++ linker 
>>> (/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld)
>>>  supports shared libraries... yes
>>> checking dynamic linker characteristics... darwin19.0.0 dyld
>>> checking how to hardcode library paths into programs... immediate
>>> checking whether we are using the GNU C++ compiler... (cached) yes
>>> checking whether g++ accepts -g... (cached) yes
>>> checking dependency style of g++... (cached) gcc3
>>> checking for gcc... (cached) gcc
>>> checking whether we are using the GNU C compiler... (cached) yes
>>> checking whether gcc accepts -g... (cached) yes
>>> checking for gcc option to accept ISO C89... (cached) none needed
>>> checking whether gcc understands -c and -o together... (cached) yes
>>> checking whether g++ accepts -rdynamic... no
>>> checking ncurses.h usability... yes
>>> checking ncurses.h presence... yes
>>> checking for ncurses.h... yes
>>> checking for term.h... yes
>>> checking execinfo.h usability... yes
>>> checking execinfo.h presence... yes
>>> checking for execinfo.h... yes
>>> checking fcntl.h usability... yes
>>> checking fcntl.h presence... yes
>>> checking for fcntl.h... yes
>>> checking fftw3.h usability... yes
>>> checking fftw3.h presence... yes
>>> checking for fftw3.h... yes
>>> checking for inttypes.h... (cached) yes
>>> checking for stdint.h... (cached) yes
>>> checking for stdlib.h... (cached) yes
>>> checking for string.h... (cached) yes
>>> checking for strings.h... (cached) yes
>>> checking for unistd.h... (cached) yes
>>> checking sys/un.h usability... yes
>>> checking sys/un.h presence... yes
>>> checking for sys/un.h... yes
>>> checking ext/atomicity.h usability... no
>>> checking ext/atomicity.h presence... no
>>> checking for ext/atomicity.h... no
>>> checking xcb/xcb.h usability... no
>>> checking xcb/xcb.h presence... no
>>> checking for xcb/xcb.h... no
>>> checking X11/Xlib.h usability... no
>>> checking X11/Xlib.h presence... no
>>> checking for X11/Xlib.h... no
>>> checking X11/Xlib-xcb.h usability... no
>>> checking X11/Xlib-xcb.h presence... no
>>> checking for X11/Xlib-xcb.h... no
>>> checking X11/Xutil.h usability... no
>>> checking X11/Xutil.h presence... no
>>> checking for X11/Xutil.h... no
>>> checking utmpx.h usability... yes
>>> checking utmpx.h presence... yes
>>> checking for utmpx.h... yes
>>> checking for xcb/xproto.h... no
>>> checking for stdbool.h that conforms to C99... no
>>> checking for _Bool... no
>>> checking for inline... inline
>>> checking for int32_t... yes
>>> checking for int64_t... yes
>>> checking for off_t... yes
>>> checking for size_t... yes
>>> checking for uint32_t... yes
>>> checking for uint64_t... yes
>>> checking for uint8_t... yes
>>> checking for error_at_line... no
>>> checking for stdlib.h... (cached) yes
>>> checking for unistd.h... (cached) yes
>>> checking for sys/param.h... yes
>>> checking for getpagesize... yes
>>> checking for working mmap... yes
>>> checking for floor... yes
>>> checking for memset... yes
>>> checking for munmap... yes
>>> checking for pow... yes
>>> checking for sqrt... yes
>>> checking for strchr... yes
>>> checking for strerror... yes
>>> checking for socket in -lsocket... no
>>> checking for yp_all in -lnsl... no
>>> checking for setupterm in -lncurses... yes
>>> checking for __atomic_fetch_add_4 in -latomicity... no
>>> checking for backtrace in -lexecinfo... no
>>> checking for acosh in -lm... yes
>>> checking for sem_init in -lpthread... yes
>>> checking for dlopen in -ldl... (cached) yes
>>> checking for fftw_plan_dft in -lfftw3... yes
>>> checking for xcb_connect in -lxcb... no
>>> checking for XOpenDisplay in -lX11... no
>>> checking for XGetXCBConnection in -lX11-xcb... no
>>> checking for SQLite3 library >= 3.0.0... yes
>>> cat: /include/sqlite3.h: No such file or directory
>>> ./configure: line 18214: test: !=: unary operator expected
>>> configure: WARNING: Cannot find SQLITE_VERSION macro in sqlite3.h header to 
>>> retrieve SQLite version!
>>> checking for pg_config... no
>>> checking for pkg-config... /usr/local/bin/pkg-config
>>> checking pkg-config is at least version 0.9.0... yes
>>> checking for XCBLIBS... yes
>>> checking for pcre2_compile_32 in -lpcre2-32... yes
>>> checking for GTK... yes
>>> checking whether CPU has rdtsc (read CPU cycle counter) opcode... yes
>>> checking whether sem_init() works... no
>>> checking whether pthread_setaffinity_np is available... no
>>> checking whether OSAtomicAdd32Barrier() is available... no
>>> checking whether atomic_add_32_nv() is available... no
>>> checking if we are compiling for Android... no
>>> checking if we want to build an erlang interface (implies libapl.so)... no
>>> checking if we want to build libapl.so... no
>>> checking if we want to build libpython_apl.so... no
>>> checking whether internal performance counters shall be enabled)... no
>>> checking whether to remember the history of APL values (debug feature)... no
>>> checking whether gprof profiling shall be enabled... no
>>> checking whether gcov coverage testing shall be enabled... no
>>> checking whether dynamic logging shall be enabled... no
>>> checking whether value flags shall be traced... no
>>> checking how picky internal tests shall be... 1
>>> checking security level (0=none, 1=configured in preferences, 2=all)... 0
>>> checking how many CPU cores shall be used by APL (experimental!)... 0
>>> checking which type of socket APserver shall use... 0
>>> checking which port number APserver shall use for TCP or UDP sockets... 
>>> 16366
>>> checking which port name APserver shall use for unix ports... 
>>> /tmp/GNU-APL/APserver
>>> checking how long a short APL value shall be at most... 12
>>> checking whether visible markers shall be used... no
>>> checking whether support for rational numbers is desired ... no
>>> checking whether we compile for an i686 CPU... no
>>> 
>>> checking that generated files are newer than configure... done
>>> configure: creating ./config.status
>>> config.status: creating Makefile
>>> config.status: creating build/Makefile
>>> config.status: creating debian/Makefile
>>> config.status: creating debian/source/Makefile
>>> config.status: creating doc/Makefile
>>> config.status: creating erlang/Makefile
>>> config.status: creating erlang/apl.erl
>>> config.status: creating gnu-apl.d/Makefile
>>> config.status: creating gnu-apl.d/preferences
>>> config.status: creating HOWTOs/Makefile
>>> config.status: creating rpm/Makefile
>>> config.status: creating rpm/apl.spec
>>> config.status: creating src/Makefile
>>> config.status: creating src/APs/Makefile
>>> config.status: creating src/Gtk/Makefile
>>> config.status: creating src/emacs_mode/Makefile
>>> config.status: creating src/native/Makefile
>>> config.status: creating src/sql/Makefile
>>> config.status: creating src/testcases/Makefile
>>> config.status: creating src/workspaces/Makefile
>>> config.status: creating support-files/Makefile
>>> config.status: creating 
>>> support-files/105-key-International-Keyboard/Makefile
>>> config.status: creating support-files/Dirk/Makefile
>>> config.status: creating support-files/Dyalog-Keyboard/Makefile
>>> config.status: creating support-files/Juergen-Mint-19/Makefile
>>> config.status: creating support-files/old-Keyboard/Makefile
>>> config.status: creating support-files/OS-X-Keyboard/Makefile
>>> config.status: creating support-files/Unicomp-Keyboard/Makefile
>>> config.status: creating support-files/WASD-Keyboard/Makefile
>>> config.status: creating tools/Makefile
>>> config.status: creating websock/Makefile
>>> config.status: creating websock/client/Makefile
>>> config.status: creating websock/server/Makefile
>>> config.status: creating workspaces/Makefile
>>> config.status: creating wslib3/Makefile
>>> config.status: creating wslib4/Makefile
>>> config.status: creating wslib5/Makefile
>>> config.status: creating wslib5/APLComponentFiles/Makefile
>>> config.status: creating wslib5/iso-apl-cf/Makefile
>>> config.status: creating config.h
>>> config.status: executing depfiles commands
>>> config.status: executing libtool commands
>>> 
>>> configure: creating ./src//buildtag.hh
>>> *** svnversion not installed: keeping old buildtag
>>> configure: creating ./src/makefile.h
>>> configure: creating ./src/configure_args.cc <http://configure_args.cc/>
>>> 
>>> configure: saving configure options in ./configure_options
>>> 
>>> ➜ make
>>> ...
>>> After long long output
>>> ...
>>> 
>>> g++ -DHAVE_CONFIG_H -I. -I..    -Wall -I sql -Werror      -g -O2 -MT 
>>> apl-Quad_GTK.o -MD -MP -MF .deps/apl-Quad_GTK.Tpo -c -o apl-Quad_GTK.o 
>>> `test -f 'Quad_GTK.cc <http://quad_gtk.cc/>' || echo './'`Quad_GTK.cc 
>>> <http://quad_gtk.cc/>
>>> Quad_GTK.cc:393 <http://quad_gtk.cc:393/>:35: error: use of undeclared 
>>> identifier 'POLLRDHUP'
>>>          fds[w].events = POLLIN | POLLRDHUP;
>>>                                   ^
>>> Quad_GTK.cc:421 <http://quad_gtk.cc:421/>:26: error: use of undeclared 
>>> identifier 'POLLRDHUP'
>>>    pfd.events = POLLIN | POLLRDHUP;
>>>                          ^
>>> 2 errors generated.
>>> make[3]: *** [apl-Quad_GTK.o] Error 1
>>> make[2]: *** [all-recursive] Error 1
>>> make[1]: *** [all-recursive] Error 1
>>> make: *** [all] Error 2
>>> 
>>> I think that this could help, thanks for all your time
>>> 
>>> Sincerely,
>>> 
>>> Toni
>>> 
>>>> El 28 nov 2019, a las 11:24, Dr. Jürgen Sauermann 
>>>> <m...@xn--jrgen-sauermann-zvb.de <mailto:m...@xn--jrgen-sauermann-zvb.de>> 
>>>> escribió:
>>>> 
>>>> Hi Antonio,
>>>> 
>>>> I fixed the -Wreturn-type warning  in SVN 1206.
>>>> 
>>>> Best Regards,
>>>> Jürgen Sauermann
>>>> 
>>>> 
>>>> On 11/28/19 10:31 AM, Antonio Juan wrote:
>>>>> Thanks for your replies I'm using OSX Catalina 10.15.1,
>>>>> 
>>>>> Like I commented, I have gnu-apl installed with homebrew and it works 
>>>>> well except for the Plot feature.
>>>>> 
>>>>> So it was a problem with X11 and GTK, for the X11 Lib I need Xquartz from 
>>>>> https://www.xquartz.org/ <https://www.xquartz.org/>
>>>>> This puts the X11 on /opt/X11, I also have this strange behavior, that I 
>>>>> asked on stack overflow: 
>>>>> https://stackoverflow.com/questions/59072106/do-not-understanig-mac-osx-x11
>>>>>  
>>>>> <https://stackoverflow.com/questions/59072106/do-not-understanig-mac-osx-x11>
>>>>> 
>>>>> Then I managed to Install Gtk with home-brew I installed gtk+ and gtk+3, 
>>>>> like this:
>>>>> https://stackoverflow.com/a/20114598/1900722 
>>>>> <https://stackoverflow.com/a/20114598/1900722>
>>>>> 
>>>>> export PKG_CONFIG_PATH=/opt/X11/lib/pkgconfig
>>>>> brew info gtk+3
>>>>> gtk+3: stable 3.24.12 (bottled)
>>>>> 
>>>>> brew info gtk
>>>>> gtk+: stable 2.24.32 (bottled), HEAD
>>>>> 
>>>>> https://stackoverflow.com/questions/20098862/how-to-install-gtk-on-osx-for-use-with-g-gcc-compiler
>>>>>  
>>>>> <https://stackoverflow.com/questions/20098862/how-to-install-gtk-on-osx-for-use-with-g-gcc-compiler>
>>>>> 
>>>>> Anf during make I get this error:
>>>>> 
>>>>> g++ -DHAVE_CONFIG_H -I. -I..    -Wall -I sql -Werror      -g -O2 -MT 
>>>>> apl-Quad_PLOT.o -MD -MP -MF .deps/apl-Quad_PLOT.Tpo -c -o apl-Quad_PLOT.o 
>>>>> `test -f 'Quad_PLOT.cc <http://quad_plot.cc/>' || echo './'`Quad_PLOT.cc 
>>>>> <http://quad_plot.cc/>
>>>>> Quad_PLOT.cc:79 <http://quad_plot.cc:79/>:1: error: control reaches end 
>>>>> of non-void function
>>>>>       [-Werror,-Wreturn-type]
>>>>> }
>>>>> ^
>>>>> 1 error generated.
>>>>> make[3]: *** [apl-Quad_PLOT.o] Error 1
>>>>> make[2]: *** [all-recursive] Error 1
>>>>> make[1]: *** [all-recursive] Error 1
>>>>> make: *** [all] Error 2
>>>>> 
>>>>> I hope that I could explain it.
>>>>> 
>>>>> 
>>>>>> El 27 nov 2019, a las 16:48, Peter Teeson <peter.tee...@me.com 
>>>>>> <mailto:peter.tee...@me.com>> escribió:
>>>>>> 
>>>>>> Hi:
>>>>>> The Macintosh operating system used to be called OS X 
>>>>>> Then it was renamed macOS. That was around the time Apple created a spin 
>>>>>> off iOS for their mobile devices.
>>>>>> 
>>>>>> So these days people refer to the hardware as Macs (both desktop and 
>>>>>> laptop)
>>>>>> And iPhone, iPad, iWatch for their mobile devices.
>>>>>> 
>>>>>> What make of Mac do you have? What version of macOS?
>>>>>> 
>>>>>> If you have questions I will try to help.
>>>>>> 
>>>>>> Peter
>>>>>> 
>>>>>>> On Nov 27, 2019, at 7:12 AM, Dr. Jürgen Sauermann 
>>>>>>> <m...@xn--jrgen-sauermann-zvb.de <http://jrgen-sauermann-zvb.de/>> 
>>>>>>> wrote:
>>>>>>> 
>>>>>>> Hi,
>>>>>>> 
>>>>>>> there is a very nice description of how to install GNU APL on Macintosh 
>>>>>>> written
>>>>>>> by Peter Teeson. You can find in in the HOWTOs directory.
>>>>>>> 
>>>>>>> I don't know if Macintosh uses OSX, but Peters document is anyhow 
>>>>>>> worthwhile reading.
>>>>>>> 
>>>>>>> BTW I have updated the ⎕PLOT error message to be more specific as to 
>>>>>>> which library is missing.
>>>>>>> 
>>>>>>> Best Rgeards,
>>>>>>> Jürgen Sauermann
>>>>>>> 
>>>>>>> 
>>>>>>> On 11/27/19 12:32 PM, Antonio Juan wrote:
>>>>>>>> Thanks; I need to completely read the GNU-APL DOC, sorry about that
>>>>>>>> 
>>>>>>>> You are right the problem is with the libxcb.
>>>>>>>> 
>>>>>>>> ⎕plot 1 2 3 4 5
>>>>>>>> SYNTAX ERROR+
>>>>>>>>       ⎕PLOT 1 2 3 4 5
>>>>>>>>       ^
>>>>>>>>       )MORE
>>>>>>>> ⎕PLOT is not available because either no libxcb library was found on 
>>>>>>>> this
>>>>>>>> system when GNU APL was compiled, or because it was disabled in 
>>>>>>>> ./configure.
>>>>>>>> 
>>>>>>>> Exist a tutorials for building gnu-apl in OSX
>>>>>>>> 
>>>>>>>> Thanks for your time
>>>>>>>> 
>>>>>>>> Toni 
>>>>>>>> 
>>>>>>>>> El 26 nov 2019, a las 17:27, Dr. Jürgen Sauermann 
>>>>>>>>> <m...@xn--jrgen-sauermann-zvb.de 
>>>>>>>>> <mailto:m...@xn--jrgen-sauermann-zvb.de>> escribió:
>>>>>>>>> 
>>>>>>>>> Hi Toni,
>>>>>>>>> 
>>>>>>>>> the + character after SYNTAX ERROR (or any other APL error) indicates 
>>>>>>>>> that there
>>>>>>>>> is more information available regarding that error. The additional 
>>>>>>>>> information
>>>>>>>>> can be displayed with command )MORE.
>>>>>>>>> 
>>>>>>>>> I suspect that in this particular case libraries needed for plotting 
>>>>>>>>> (essentially libX11.so,
>>>>>>>>> libxcb.so, and libX11-xcb.so) were missing on the platform where GNU 
>>>>>>>>> APL was compiled
>>>>>>>>> (i.e. your own machine if you compiled from source or the build 
>>>>>>>>> machine of a package if
>>>>>>>>> you installed a binary package).
>>>>>>>>> 
>>>>>>>>> For ⎕PLOT to work, you may need to compile the interpreter from 
>>>>>>>>> source with the required
>>>>>>>>> X libraries installed beforehand.
>>>>>>>>> 
>>>>>>>>> Best Regards,
>>>>>>>>> Jürgen Sauermann
>>>>>>>>> 
>>>>>>>>> 
>>>>>>>>> On 11/26/19 2:27 PM, Antonio Juan wrote:
>>>>>>>>>> Thanks for this awesome software. I have installed gnu plot 1.8 from 
>>>>>>>>>> brew package. It works well, and good integration with emacs. So it 
>>>>>>>>>> is a good environment for learning APL.
>>>>>>>>>> 
>>>>>>>>>> The only think is that when I try to plot I always get the following 
>>>>>>>>>> error:
>>>>>>>>>> 
>>>>>>>>>>        ⎕PLOT 0 1 ¯1 2 ¯2 3 ¯3
>>>>>>>>>> SYNTAX ERROR+
>>>>>>>>>>       ⎕PLOT 0 1 ¯1 2 ¯2 3 ¯3
>>>>>>>>>>       ^
>>>>>>>>>> 
>>>>>>>>>> I do not see anywhere, if is needed to load a workspace, or the 
>>>>>>>>>> needed for some environment configuration during installation. So 
>>>>>>>>>> really I do not know how to proceed.
>>>>>>>>>> 
>>>>>>>>>> Thanks for your time
>>>>>>>>>> 
>>>>>>>>>> Toni
>>>>>>>>>> 
>>>>>>>>> 
>>>>>>>> 
>>>>>>> 
>>>>>> 
>>>>> 
>>>> 
>>> 
>> 
> 

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