There is a conflict with make behavior and AC_CHECK_PROG macro behavior (maybe) when prog. is aliased (OS: cygwin) : for example: $ type -a hhc hhc is aliased to `/cygdrive/c/Util/Dev/htmlhelp/hhc.exe' configure.ac: AC_CHECK_PROG([FOUND],[hhc],[yes],[no]) if test "x$FOUND" = "xno"; then AC_MSG_ERROR(['hhc' is required !]) else AC_SUBST(HHC,hhc) fi configure: checking for hhc... (cached) yes Makefile.am : $(CHM_FILENAME) : $(SUB_DIR)/index.hhp $(SUB_DIR)/index.hhc $(SUB_DIR)/index.hhk cd $(SUB_DIR) && $(HHC) index.hhp make: cd tdg/en/html && hhc index.hhp /bin/sh: line 1: hhc: command not found Why does AC_CHECK_PROG find hhc ? _______________________________________________ Autoconf mailing list Autoconf@xxxxxxx http://lists.gnu.org/mailman/listinfo/autoconf