if

Linux 下的编译工具

#                                                                    -*-perl-*-
$description = "Test the if function.\n";

$details = "Try various uses of if and ensure they all give the correct
results.\n";

open(MAKEFILE, "> $makefile");

print MAKEFILE <<EOMAKE;
NEQ = \$(subst \$1,,\$2)
e =

all:
\t\@echo 1 \$(if    ,true,false)
\t\@echo 2 \$(if ,true,)
\t\@echo 3 \$(if ,true)
\t\@echo 4 \$(if z,true,false)
\t\@echo 5 \$(if z,true,\$(shell echo hi))
\t\@echo 6 \$(if ,\$(shell echo hi),false)
\t\@echo 7 \$(if \$(call NEQ,a,b),true,false)
\t\@echo 8 \$(if \$(call NEQ,a,a),true,false)
\t\@echo 9 \$(if z,true,fal,se) hi
\t\@echo 10 \$(if ,true,fal,se)there
\t\@echo 11 \$(if \$(e) ,true,false)
EOMAKE

close(MAKEFILE);

&run_make_with_options($makefile, "", &get_logfile);
$answer = "1 false\n2\n3\n4 true\n5 true\n6 false\n7 true\n8 false\n9 true hi\n10 fal,sethere\n11 false\n";
&compare_output($answer, &get_logfile(1));

1;