Re: trunk r115773: Port xcrun configuration to GNU/Linux.

[Glenn Morris]

xcsdkdir=
AC_CHECK_PROGS(XCRUN, [xcrun])
if test -n "$XCRUN"; then
  AC_CHECK_PROGS(MAKE, [make "$XCRUN make"])
  test -n "$MAKE" && export MAKE
  xcsdkdir=`$XCRUN --show-sdk-path 2>/dev/null`
fi

I don't have "xcrun" installed. So AC_CHECK_PROGS never tests for make.
This results in lib/Makefile containing

  MAKE = 

for me. This is obviously A Bad Thing. Eg:

  make -C lib
  /bin/bash: all-am: command not found


(I'm loving this feature freeze as much as usual.)