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The libiberty hash table includes a helper function for strings, but no equality function. Consequently, this equality function has been reimplemented a number of times in both the gcc and binutils-gdb source trees. This patch adds the function to the libiberty hash table, as a step toward the goal of removing all the copies. One change to gcc is included here. Normally I would have put this in the next patch, but gensupport.c used the most natural name for its reimplementation of this function, and this can't coexist with the extern function in libiberty. include * hashtab.h (htab_eq_string): Declare. libiberty * hashtab.c (htab_eq_string): New function. gcc * gensupport.c (htab_eq_string): Remove.
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