Here is something to get you started and how to make END blocks work (just slightly modified from a example in perlembed):

#include <EXTERN.h>
#include <perl.h>
/*
 * embedex.c
 * based on https://perldoc.perl.org/perlembed.html
 * slightly modified by bliako for https://perlmonks.org/?node_id=1229
+069
 * actually, bliako just inserted the perl code.
 */
static PerlInterpreter *my_perl;
int main (int argc, char **argv, char **env){
     char *embedding[] = { "", "-e", "0" };
     PERL_SYS_INIT3(&argc,&argv,&env);
     my_perl = perl_alloc();
     perl_construct( my_perl );
     perl_parse(my_perl, NULL, 3, embedding, NULL);
     PL_exit_flags |= PERL_EXIT_DESTRUCT_END;
     perl_run(my_perl);
     eval_pv("BEGIN{ print q(in BEGIN\n); } print q(running\n); END { 
+print q(in END\n); }; 1;", TRUE);
     perl_destruct(my_perl);
     perl_free(my_perl);
     PERL_SYS_TERM();
 }
[download]

You need to compile the above using CC, CFLAGS and LDFLAGS best supplied by Perl itself via Config and ExtUtils::Embed like so (assuming bash shell):

Update: Just to clarify that the above is about embedding a perl interpreter inside a C program. The interpreter is then used to execute a perl script. This has nothing to do with taking a Perl script and converting it into C code. Or converting a Perl script into assembly. Or converting a Perl optree to C code or assembly.

$(perl -MConfig -e 'print $Config{cc}') embedex.c $(perl -MExtUtils::E
+mbed -e ccopts -e ldopts) -o embedex
[download]

$ ./embedex
in BEGIN
running
in END
[download]

Regarding detecting when a perl script is run under a debugger, read perlvar

bw, bliako

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