1. 2021-06-30 [1] obsolete replacements (that aren't always) autoconf- Karl Berry 2. 2021-06-01 [2] [sr #110503] Autoconf 2.70 regression: gkt-doc/gtkdoc autoconf- Marvin Scholz 3. 2021-06-01 [1] autoconf 2.71, AX_PROG_CC_FOR_BUILD and BUILD_*EXT autoconf- Sven Verdoola