llvm-project/polly/lib/External/isl/m4/ax_submodule.m4

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AC_DEFUN([AX_SUBMODULE],
[
m4_if(m4_bregexp($2,|,choice),choice,
[AC_ARG_WITH($1,
[AS_HELP_STRING([--with-$1=$2],
[Which $1 to use [default=$3]])])])
case "system" in
$2)
AC_ARG_WITH($1_prefix,
[AS_HELP_STRING([--with-$1-prefix=DIR],
[Prefix of $1 installation])])
AC_ARG_WITH($1_exec_prefix,
[AS_HELP_STRING([--with-$1-exec-prefix=DIR],
[Exec prefix of $1 installation])])
esac
m4_if(m4_bregexp($2,build,build),build,
[AC_ARG_WITH($1_builddir,
[AS_HELP_STRING([--with-$1-builddir=DIR],
[Location of $1 builddir])])])
if test "x$with_$1_prefix" != "x" -a "x$with_$1_exec_prefix" = "x"; then
with_$1_exec_prefix=$with_$1_prefix
fi
if test "x$with_$1_prefix" != "x" -o "x$with_$1_exec_prefix" != "x"; then
if test "x$with_$1" != "x" -a "x$with_$1" != "xyes" -a "x$with_$1" != "xsystem"; then
AC_MSG_ERROR([Setting $with_$1_prefix implies use of system $1])
fi
with_$1="system"
fi
if test "x$with_$1_builddir" != "x"; then
if test "x$with_$1" != "x" -a "x$with_$1" != "xyes" -a "x$with_$1" != "xbuild"; then
AC_MSG_ERROR([Setting $with_$1_builddir implies use of build $1])
fi
with_$1="build"
$1_srcdir=`echo @abs_srcdir@ | $with_$1_builddir/config.status --file=-`
AC_MSG_NOTICE($1 sources in $$1_srcdir)
fi
if test "x$with_$1_exec_prefix" != "x"; then
export PKG_CONFIG_PATH="$with_$1_exec_prefix/lib/pkgconfig${PKG_CONFIG_PATH+:$PKG_CONFIG_PATH}"
fi
case "$with_$1" in
$2)
;;
*)
case "$3" in
bundled)
if test -d $srcdir/.git -a \
-d $srcdir/$1 -a \
! -d $srcdir/$1/.git; then
AC_MSG_WARN([git repo detected, but submodule $1 not initialized])
AC_MSG_WARN([You may want to run])
AC_MSG_WARN([ git submodule init])
AC_MSG_WARN([ git submodule update])
AC_MSG_WARN([ sh autogen.sh])
fi
if test -f $srcdir/$1/configure; then
with_$1="bundled"
else
with_$1="no"
fi
;;
*)
with_$1="$3"
;;
esac
;;
esac
AC_MSG_CHECKING([which $1 to use])
AC_MSG_RESULT($with_$1)
])