As a general rule it is best to let gsc do the linking of the executable program (using the -exe option) so that any necessary linker options are passed to the C compiler. You can check which linking options are necessary by passing the -verbose option to gsc when compiling a small dummy program.

My guess is that the order of the -ldl and -lutil options is important. Can you try putting them at the end of the options passed to gcc?

Marc

On Apr 28, 2016, at 11:06 AM, Francois Magnan fmagnan@me.com wrote:

Hi,

I am trying to compile my program on the latest Ubuntu release

gcc version 5.3.1 20160413 (Ubuntu 5.3.1-14ubuntu2)

I have the lastest gambit that compiled flawlessly:

/usr/local/Gambit/bin/gsc -v v4.8.5 20160401231324 x86_64-unknown-linux-gnu “./configure '--enable-single-host' '--enable-gcc-opts'"

I build my program using:

/usr/local/Gambit/bin/gsc -:f8,t8,-8 -link loader gcc -o athena loader.c loader_.c -lutil -ldl -lm -L/usr/local/Gambit/lib/ /usr/local/Gambit/lib/libgambit.a -I/usr/local/Gambit/include/

but at link I get the following error:

/usr/local/Gambit/lib/libgambit.a(os_dyn.o): In function `___dynamic_load': os_dyn.c:(.text+0x1c0): undefined reference to `dlopen' os_dyn.c:(.text+0x1d4): undefined reference to `dlsym' os_dyn.c:(.text+0x1ec): undefined reference to `dlerror' os_dyn.c:(.text+0x228): undefined reference to `dlclose' /usr/local/Gambit/lib/libgambit.a(os_dyn.o): In function `___cleanup_dyn_module': os_dyn.c:(.text+0x3dc): undefined reference to `dlclose' /usr/local/Gambit/lib/libgambit.a(os_io.o): In function `___device_stream_setup_from_process': os_io.c:(.text+0x21cc): undefined reference to `openpty' collect2: error: ld returned 1 exit status

Any hint on what is wrong?

Thank you, Francois Magnan

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