Hi Monks,

Today I've started to study perlembed, Here is the first code example in Perlembed: 

#include <EXTERN.h>               /* from the Perl distribution     */
 #include <perl.h>                 /* from the Perl distribution     *
+/

 static PerlInterpreter *my_perl;  /***    The Perl interpreter    ***
+/

 int main(int argc, char **argv, char **env)
 {
    PERL_SYS_INIT3(&argc,&argv,&env);
        my_perl = perl_alloc();
        perl_construct(my_perl);
    PL_exit_flags |= PERL_EXIT_DESTRUCT_END;
        perl_parse(my_perl, NULL, argc, argv, (char **)NULL);
        perl_run(my_perl);
        perl_destruct(my_perl);
        perl_free(my_perl);
    PERL_SYS_TERM();
    exit(EXIT_SUCCESS);
 }

[download]
Ican build it successfully, and it works as expected.(windows 10, strawberry perl 5.32) But if I change interpreter variable name to his_perl, it doesn't work! 
#include <EXTERN.h>
#include <perl.h>



 static PerlInterpreter *his_perl ;  /***    The Perl interpreter    *
+**/

 int main(int argc, char **argv, char **env)
 {

    PERL_SYS_INIT3(&argc,&argv,&env);
      
    PERL_SYS_TERM();  his_perl = perl_alloc();
        perl_construct(his_perl);
        PL_exit_flags |= PERL_EXIT_DESTRUCT_END;
        perl_parse(his_perl, NULL, argc, argv, (char **)NULL);
        perl_run(his_perl);
        perl_destruct(his_perl);
        perl_free(his_perl);
    exit(EXIT_SUCCESS);
 }

[download]
It can't be build, and complains identifier "my_perl" is undefined. I notice in perl.h aTHX hard code define to my_perl, I guess that is the reason why his_perl version can't be built. But why is this name(my_perl) so important, that it should write it into perl.h? Please enlighten me.

In reply to perl interpreter must be named my_perl? by Anonymous Monk

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