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Cory Fields authored
- guard PKG_PROG_PKG_CONFIG with an m4_ifdef. If not building for windows, require it - add nops as necessary in case the ifdef reduces the if/then to nothing - AC_SUBST some missing _LIBS. These were split out over time, but not all were properly substituted. They continued to work if pkg-config is installed because it does the AC_SUBST itself
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