Wouldn't you change src/main/devPS.c file (patch will follow). Problem is with minus sign in ps output. The original code forces the name /minus to the character number 45 (-). But /minus symbol is not defined in standard Adobe encoding and (even worse) is not defined in most type1 fonts (where the name /hyphen is used instead), in this case you will have an empty space instead of -. Redefining encoding for this fonts does not help because encoding vector in ps output got "corrected" and /hyphen (or any other name I have selected for 45'th character) is replaced with /minus. I have tried this patch and it works for me.
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449,450c449 < // if(c == 45) strcpy(dest, "/minus"); else < strcpy(dest, state->p0); --- > if(c == 45) strcpy(dest, "/minus"); else strcpy(dest, state->p0);
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