Defines starting with `a' in bsd/include

• _A bsd/include/ctype.h:70
• AR_EFMT1 bsd/include/ar.h:75
• AREGTYPE bsd/include/tar.h:70
• ARFMAG bsd/include/ar.h:84
• _AR_H_ bsd/include/ar.h:66
• ARMAG bsd/include/ar.h:72