NetBSD/etc/Makefile.params

150 lines
4.3 KiB
Makefile

# $NetBSD: Makefile.params,v 1.1 2012/12/03 13:53:28 apb Exp $
#
# Makefile fragment for printing build parameters.
#
# Public variables:
# RELEASEVARS
# List of variables whose value should be printed.
#
# PRINT_PARAMS
# A command to print the desired variables and values.
# Values are printed as single-quoted strings, with
# embedded quotes and newlines escaped in a way that's
# acceptable to sh(1). Undefined values are printed
# as "(undefined)" (without quotation marks).
#
# Internal targets:
# _params:
# Prints the names and values of all the variables
# listed in ${RELEASEVARS}. The output may be intermixed
# with debugging information, which can be removed by the
# ${_PARAMS_POSTPROCESS} command.
#
# Internal variables:
# _PARAMS_POSTPROCESS
# A command to postprocess the output from "make _params",
# to remove debugging information and other noise.
#
# Example:
# . ${NETBSDSRCDIR}/etc/Makefile.params
# show-params: .MAKE .PHONY # print params to stdout
# @${PRINT_PARAMS}
#
.include <bsd.sys.mk> # for TOOL_AWK, ...
RELEASEVARS= BSDOBJDIR BSDSRCDIR BUILDID \
DESTDIR DISTRIBVER EXTERNAL_TOOLCHAIN HAVE_GCC HAVE_GDB \
INSTALLWORLDDIR \
KERNARCHDIR KERNCONFDIR KERNOBJDIR KERNSRCDIR \
MACHINE MACHINE_ARCH MAKE MAKECONF MAKEFLAGS \
MAKEOBJDIR MAKEOBJDIRPREFIX MAKEVERBOSE \
MKBFD MKBINUTILS MKCATPAGES \
MKCRYPTO MKCRYPTO_RC5 MKCVS \
MKDEBUG MKDEBUGLIB MKDOC MKDTRACE MKDYNAMICROOT \
MKGCC MKGCCCMDS MKGDB \
MKHESIOD MKHTML MKIEEEFP MKINET6 MKINFO MKIPFILTER \
MKKERBEROS MKLDAP MKLINKLIB MKLINT \
MKMAN MKMANZ MKMDNS MKNLS MKNPF MKOBJ MKOBJDIRS \
MKPAM MKPF MKPIC MKPICINSTALL MKPICLIB MKPOSTFIX MKPROFILE \
MKSHARE MKSKEY MKSOFTFLOAT MKSTATICLIB \
MKUNPRIVED MKUPDATE MKX11 MKYP \
NBUILDJOBS NETBSDSRCDIR \
NOCLEANDIR NODISTRIBDIRS NOINCLUDES \
OBJMACHINE \
RELEASEDIR RELEASEMACHINEDIR TOOLCHAIN_MISSING TOOLDIR \
USE_HESIOD USE_INET6 USE_JEMALLOC USE_KERBEROS USE_LDAP \
USE_PAM USE_SKEY USE_YP \
USETOOLS USR_OBJMACHINE \
X11SRCDIR X11FLAVOUR
PRINT_PARAMS= (cd ${.CURDIR}; ${MAKE} _params) | ${_PARAMS_POSTPROCESS}
_params: .PHONY
.for var in ${RELEASEVARS}
.if defined(${var})
@printf "%20s = '%-s'\n" ${var} ${${var}:C/'/'\\\\''/gW:Q}
.else
@printf "%20s = (undefined)\n" ${var}
.endif
.endfor
# _PARAMS_POSTPROCESS:
#
# The output from the "make _params" can include the following types of
# unwanted lines:
#
# make -j prints "--- params ---";
#
# if MAKEVERBOSE is set to 3 or more then make prints each "printf"
# command in addition to executing it;
#
# if MAKEVERBOSE is set to 4 then the shell prints each command
# (prefixed with "+").
#
# So the resulting output can look like this:
#
# --- params ---
# + echo 'printf "%20s = '\''%-s'\''\n" BSDOBJDIR /usr/obj'
# printf "%20s = '%-s'\n" BSDOBJDIR /usr/obj
# + printf '%20s = '\''%-s'\''\n' BSDOBJDIR /usr/obj
# BSDOBJDIR = '/usr/obj'
# + echo 'printf "%20s = '\''%-s'\''\n" BSDSRCDIR /usr/src'
# printf "%20s = '%-s'\n" BSDSRCDIR /usr/src
# + printf '%20s = '\''%-s'\''\n' BSDSRCDIR /usr/src
# BSDSRCDIR = '/usr/src'
# [...]
#
# where what we want is just this:
#
# BSDOBJDIR = '/usr/obj'
# BSDSRCDIR = '/usr/src'
# [...]
#
# The awk program in ${PARAMS_POSTPROCESS} removes the unwanted noise,
# taking care with variables whose values contain embedded newlines
# (assuming that embedded newlines appear only inside single quotes).
#
_PARAMS_POSTPROCESS= ${TOOL_AWK} '\
BEGIN { single_quote = "'\''"; \
NORMAL = 0; \
SKIP_HEADING = 1; \
SKIP_MULTILINE = 2; \
PRINT_MULTILINE = 3; \
state = SKIP_HEADING; \
} \
function quotes_balanced_p(line) { \
return (line ~ /^([^\\"'\'']|\\.|'\''[^'\'']*'\''|"(\\.|[^\\"])*")*$$/); \
} \
state == SKIP_MULTILINE { \
if (quotes_balanced_p(single_quote $$0)) { \
state = NORMAL; \
} \
next; \
} \
state == PRINT_MULTILINE { \
if (quotes_balanced_p(single_quote $$0)) { \
state = NORMAL; \
} \
print; next; \
} \
state == SKIP_HEADING && $$0 ~ /^--- .* ---$$/ { next; } \
state == SKIP_HEADING && $$0 ~ / ===> / { next; } \
/^(\+ )?(echo ["'\''])?printf.* = / { \
if (quotes_balanced_p($$0)) { \
state = NORMAL; \
} else { \
state = SKIP_MULTILINE; \
} \
next; \
} \
// { \
if (quotes_balanced_p($$0)) { \
state = NORMAL; \
} else { \
state = PRINT_MULTILINE; \
} \
print; next; \
} \
'