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$ perl -V:cc cc='cc';
$ perl -V:ccname ccname='gcc';
$ perl -V:'^g?cc.*' cc='cc'; ... gccosandvers=''; gccversion='4.4.5'; ccflags_nolargefiles='-D_REENTRANT -D_GNU_SOURCE -fno-strict-aliasing +-pipe -fstack-protector -I/usr/local/include ';