Use gnulib's c-ctype.h, not <ctype.h>.
# Convert uses of isspace to c_isspace, isdigit to c_isdigit, etc. re=$(man isspace|grep is.....,.is|sed 's/ -.*//' \ |tr -s ', \n' \||sed 's/^|//;s/|$//') git grep -l -E "$re"|grep -Ev 'Chan|gnulib' \ |xargs perl -pi -e 's/\b('"$re"')\b/c_$1/g' # Remove all uses of to_uchar git grep -l to_uchar|xargs perl -pi -e 's/to_uchar\((.*?)\)/$1/g' * src/util.h (to_uchar): Remove definition. (TOLOWER): Remove definition. (__virMacAddrCompare): Use c_tolower, not TOLOWER. Globally: Where needed, change <ctype.h> to <c-ctype.h>. Remove unnecessary inclusion of <ctype.h>. Ensure the global changes are never needed again: * Makefile.maint (sc_avoid_ctype_macros): Prohibit use of ctype macros. Recommend c-ctype.h instead. (sc_prohibit_c_ctype_without_use): New rule. (sc_prohibit_ctype_h): New rule. Disallow use of <ctype.h>.
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