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# Several convenience wrappers for checking the programs
# Convert a pre-set tool variable to absolute path if it is not already.
AC_DEFUN([CTNG_PATH_ABSNAME],
[CTNG_MSG_LOG_ENVVAR([$1], [must determine absolute path for '$$1'])
AS_CASE([$$1],
[/*],,
[*\ *],,
[?*],[AC_MSG_CHECKING([for absolute path to $$1])
$1=$(which $$1)
AC_MSG_RESULT([$$1])])])
# Check for required tool
AC_DEFUN([CTNG_CHECK_TOOL_REQ],
[AC_CHECK_TOOLS([$1], [$2])
AS_IF(
[test -z "$$1"],
[AC_MSG_ERROR([missing required tool: $2])])
])
# Check for required tool, set variable to full pathname
AC_DEFUN([CTNG_PATH_TOOL_REQ],
[AC_ARG_VAR([$1], [Specify the full path to GNU $3])
CTNG_CHECK_TOOL_REQ([$1], [$2])
CTNG_PATH_ABSNAME([$1])])
# Check for required program
AC_DEFUN([CTNG_CHECK_PROGS_REQ],
[AC_CHECK_PROGS([$1], [$2])
AS_IF(
[test -z "$$1"],
[AC_MSG_ERROR([missing required tool: $2])])
])
# Check for path to required program
AC_DEFUN([CTNG_PATH_PROGS_REQ],
[AC_PATH_PROGS([$1], [$2])
AS_IF(
[test -z "$$1"],
[AC_MSG_ERROR([missing required tool: $2])])
])
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