File: check_gnu_make.m4

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#
# Check for GNU Make.  This is originally from
# http://www.gnu.org/software/ac-archive/htmldoc/check_gnu_make.html
#
AC_DEFUN([AC_CHECK_GNU_MAKE],
[AC_CACHE_CHECK([for GNU make],[llvm_cv_gnu_make_command],
dnl Search all the common names for GNU make
[llvm_cv_gnu_make_command=''
 for a in "$MAKE" make gmake gnumake ; do
  if test -z "$a" ; then continue ; fi ;
  if  ( sh -c "$a --version" 2> /dev/null | grep GNU 2>&1 > /dev/null ) 
  then
   llvm_cv_gnu_make_command=$a ;
   break;
  fi
 done])
dnl If there was a GNU version, then set @ifGNUmake@ to the empty string, 
dnl '#' otherwise
 if test "x$llvm_cv_gnu_make_command" != "x"  ; then
   ifGNUmake='' ;
 else
   ifGNUmake='#' ;
   AC_MSG_RESULT("Not found");
 fi
 AC_SUBST(ifGNUmake)
])