392fef - Prepend local variable names w/ a function-unique prefix to prevent collisions and leaks.

Authored and Committed by Lucio Andrés Illanes Albornoz (arab, vxp) 8 years ago
    - Prepend local variable names w/ a function-unique prefix to prevent collisions and leaks.
    - Implemented consistent build/configure/install variable handling with per-level [0123]
      defaults. Fixes lack of uniform CFLAGS (-g3 -O0) usage. The new build variables include:
      - {AR,CC,RANLIB}_{BUILD,CONFIGURE,INSTALL},
      - {{C,LD,MAKE}FLAGS_{BUILD,CONFIGURE,INSTALL}}{,_EXTRA},
      - CONFIGURE_ARGS{,_EXTRA}, ENV_VARS_EXTRA, LIBTOOL_MIDIPIX, and PREFIX_EXTRA.
    
        
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