fix(cmd_parse): command parsing on arm machines

[joennlae]

Problem

This benchmark will always exit through the print_usage in the default switch case on ARM machines.

rma-mt/src/rmamt_options.c

Lines 234 to 236 in d09c4d0

	default:
	print_usage (name, true);
	}

As the getlong_opt returns an int and c is defined as char

rma-mt/src/rmamt_options.c

Line 109 in d09c4d0

while (-1 != (c = getopt_long (argc, argv, "wi:t:bhz:o:s:m:l:xr:", options, NULL))) {

rma-mt/src/rmamt_options.c

Line 79 in d09c4d0

char c, *tmp;

On x86 this is not an issue but on arm this can never exit as -1 will be converted into 255 and it end up in the default switch statement.

This PR fixes

• fixing command parsing as some compiler do not auto correct the -1 to a char type

• also I needed to use ./configure LIBS="-lpthread" to make it compile

More infos

Compiler Explorer

I think cmp on arm

cmp     r3, #-1

yields different flags than the `cmp on x86

cmp     BYTE PTR [rbp-1], -1