commandline session $cat testgcc.pl #!/usr/bin/perl -w use Test::More tests => 2 ; my $result; system “gcc unsigned.c”; $result = `./a.out`; #print $result; ok ($result lt 0); system “gcc -funsigned-char unsigned.c”; $result = `./a.out`; #print $result; ok ($result gt 0); $cat unsigned.c #include int main(void) { char c = -10; printf(“%d”,c); return 0; } $perl testgcc.pl …
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