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- ## -*- Autoconf -*-
- # Copyright (C) 2009-2017 Free Software Foundation, Inc.
- #
- # This file is free software; the Free Software Foundation
- # gives unlimited permission to copy and/or distribute it,
- # with or without modifications, as long as this notice is preserved.
- # AM_SILENT_RULES([DEFAULT])
- # --------------------------
- # Enable less verbose build rules; with the default set to DEFAULT
- # ("yes" being less verbose, "no" or empty being verbose).
- AC_DEFUN([AM_SILENT_RULES],
- [AC_ARG_ENABLE([silent-rules], [dnl
- AS_HELP_STRING(
- [--enable-silent-rules],
- [less verbose build output (undo: "make V=1")])
- AS_HELP_STRING(
- [--disable-silent-rules],
- [verbose build output (undo: "make V=0")])dnl
- ])
- case $enable_silent_rules in @%:@ (((
- yes) AM_DEFAULT_VERBOSITY=0;;
- no) AM_DEFAULT_VERBOSITY=1;;
- *) AM_DEFAULT_VERBOSITY=m4_if([$1], [yes], [0], [1]);;
- esac
- dnl
- dnl A few 'make' implementations (e.g., NonStop OS and NextStep)
- dnl do not support nested variable expansions.
- dnl See automake bug#9928 and bug#10237.
- am_make=${MAKE-make}
- AC_CACHE_CHECK([whether $am_make supports nested variables],
- [am_cv_make_support_nested_variables],
- [if AS_ECHO([['TRUE=$(BAR$(V))
- BAR0=false
- BAR1=true
- V=1
- am__doit:
- @$(TRUE)
- .PHONY: am__doit']]) | $am_make -f - >/dev/null 2>&1; then
- am_cv_make_support_nested_variables=yes
- else
- am_cv_make_support_nested_variables=no
- fi])
- if test $am_cv_make_support_nested_variables = yes; then
- dnl Using '$V' instead of '$(V)' breaks IRIX make.
- AM_V='$(V)'
- AM_DEFAULT_V='$(AM_DEFAULT_VERBOSITY)'
- else
- AM_V=$AM_DEFAULT_VERBOSITY
- AM_DEFAULT_V=$AM_DEFAULT_VERBOSITY
- fi
- AC_SUBST([AM_V])dnl
- AM_SUBST_NOTMAKE([AM_V])dnl
- AC_SUBST([AM_DEFAULT_V])dnl
- AM_SUBST_NOTMAKE([AM_DEFAULT_V])dnl
- AC_SUBST([AM_DEFAULT_VERBOSITY])dnl
- AM_BACKSLASH='\'
- AC_SUBST([AM_BACKSLASH])dnl
- _AM_SUBST_NOTMAKE([AM_BACKSLASH])dnl
- ])
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