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Annotation of src/etc/Makefile.params, Revision 1.17

1.17    ! christos    1: #      $NetBSD: Makefile.params,v 1.16 2017/01/08 17:39:08 christos Exp $
1.1       apb         2: #
                      3: # Makefile fragment for printing build parameters.
                      4: #
                      5: # Public variables:
                      6: #      RELEASEVARS
                      7: #              List of variables whose value should be printed.
                      8: #
                      9: #      PRINT_PARAMS
1.4       apb        10: #              A command to print the desired variables and values
                     11: #              to stdout, without any additional debugging information.
1.1       apb        12: #              Values are printed as single-quoted strings, with
                     13: #              embedded quotes and newlines escaped in a way that's
                     14: #              acceptable to sh(1).  Undefined values are printed
                     15: #              as "(undefined)" (without quotation marks).
                     16: #
                     17: # Internal targets:
                     18: #      _params:
1.4       apb        19: #              Prints the names and values of all the variables
                     20: #              listed in ${RELEASEVARS}.  The desired results may be
                     21: #              redirected somewhere other than stdout, for example by
                     22: #              setting _params_redirect='>&3'.  stdout and stderr may
                     23: #              contain unwanted debugging information, from make and
                     24: #              the shell.
1.1       apb        25: #
                     26: # Internal variables:
1.4       apb        27: #      _params_redirect:
                     28: #              If set, this should be a shell redirection specification, such
                     29: #              as '>&3', controlling where the output from "make _params" will
                     30: #              be sent.
1.1       apb        31: #
                     32: # Example:
                     33: #      . ${NETBSDSRCDIR}/etc/Makefile.params
                     34: #      show-params: .MAKE .PHONY # print params to stdout
                     35: #              @${PRINT_PARAMS}
                     36: #
                     37:
1.7       apb        38: .include <bsd.own.mk>  # for some variables
1.5       apb        39:
1.14      christos   40: RELEASEVARS=   DISTRIBVER EXTERNAL_TOOLCHAIN HAVE_GCC HAVE_GDB \
1.3       njoly      41:                HAVE_LLVM HAVE_PCC INSTALLWORLDDIR \
1.17    ! christos   42:                MACHINE MACHINE_ARCH MAKECONF \
1.1       apb        43:                MAKEOBJDIR MAKEOBJDIRPREFIX MAKEVERBOSE \
                     44:                NOCLEANDIR NODISTRIBDIRS NOINCLUDES \
1.14      christos   45:                TOOLCHAIN_MISSING \
1.1       apb        46:                USE_HESIOD USE_INET6 USE_JEMALLOC USE_KERBEROS USE_LDAP \
                     47:                USE_PAM USE_SKEY USE_YP \
1.14      christos   48:                USETOOLS
                     49:
                     50: .if ${MKREPRO:Uno} != "yes"
                     51: RELEASEVARS+=  BSDOBJDIR BSDSRCDIR BUILDID BUILDINFO BUILDSEED \
1.17    ! christos   52:                DESTDIR KERNARCHDIR KERNCONFDIR KERNOBJDIR KERNSRCDIR MAKE \
1.15      christos   53:                MAKEFLAGS NBUILDJOBS NETBSDSRCDIR OBJMACHINE OBJMACHINE_ARCH \
1.14      christos   54:                RELEASEDIR RELEASEMACHINEDIR TOOLDIR USR_OBJMACHINE X11SRCDIR
                     55: .endif
1.1       apb        56:
1.16      christos   57: RELEASEVARS+= ${_MKVARS.yes} ${_MKVARS.no}
1.5       apb        58:
                     59: #
                     60: # Duplicate the DISTRIBVER setting from src/etc/Makefile.
                     61: #
                     62: .ifndef DISTRIBVER
1.7       apb        63: DISTRIBVER!=   ${HOST_SH} ${NETBSDSRCDIR}/sys/conf/osrelease.sh
1.5       apb        64: .endif
                     65:
                     66: #
                     67: # _params does the printing.
                     68: #
1.4       apb        69: _params_redirect?= # empty
1.1       apb        70:
                     71: _params: .PHONY
1.14      christos   72: .for var in ${RELEASEVARS:O}
1.1       apb        73: .if defined(${var})
1.4       apb        74:        @printf "%20s = '%-s'\n" ${var} ${${var}:C/'/'\\\\''/gW:Q} \
                     75:            ${_params_redirect}
1.1       apb        76: .else
1.5       apb        77:        @printf "%20s = (undefined)\n" ${var} \
1.4       apb        78:            ${_params_redirect}
1.1       apb        79: .endif
                     80: .endfor
                     81:
1.4       apb        82: # PRINT_PARAMS:
1.1       apb        83: #
                     84: # The output from the "make _params" can include the following types of
                     85: # unwanted lines:
                     86: #
1.4       apb        87: #     make -j prints "--- _params ---";
1.1       apb        88: #
                     89: #     if MAKEVERBOSE is set to 3 or more then make prints each "printf"
                     90: #     command in addition to executing it;
                     91: #
                     92: #     if MAKEVERBOSE is set to 4 then the shell prints each command
                     93: #     (prefixed with "+").
                     94: #
                     95: # So the resulting output can look like this:
                     96: #
1.4       apb        97: #      --- _params ---
1.1       apb        98: #      + echo 'printf "%20s = '\''%-s'\''\n" BSDOBJDIR /usr/obj'
                     99: #      printf "%20s = '%-s'\n" BSDOBJDIR /usr/obj
                    100: #      + printf '%20s = '\''%-s'\''\n' BSDOBJDIR /usr/obj
                    101: #                 BSDOBJDIR = '/usr/obj'
                    102: #      + echo 'printf "%20s = '\''%-s'\''\n" BSDSRCDIR /usr/src'
                    103: #      printf "%20s = '%-s'\n" BSDSRCDIR /usr/src
                    104: #      + printf '%20s = '\''%-s'\''\n' BSDSRCDIR /usr/src
                    105: #                 BSDSRCDIR = '/usr/src'
                    106: #      [...]
                    107: #
                    108: # where what we want is just this:
                    109: #
                    110: #                 BSDOBJDIR = '/usr/obj'
                    111: #                 BSDSRCDIR = '/usr/src'
                    112: #                 [...]
                    113: #
1.4       apb       114: # The shell redirections in ${PRINT_PARAMS} ensure that the unwanted
                    115: # noise is discarded (via ">/dev/null"), while the desired information
                    116: # ends up on the subshell's stdout (via ">&3" and "3>&1").  The value
                    117: # of _params_redirect is passed in the environment instead of on the
                    118: # command line, to prevent it from appearing in MAKEFLAGS (which would
                    119: # appear in the output).
                    120: #
                    121: PRINT_PARAMS:= (_params_redirect='>&3' ${MAKE} -f ${.PARSEDIR:Q}/${.PARSEFILE:Q} _params 3>&1 >/dev/null)