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Diffstat (limited to 'devel/bmake/files/mk/warnings.mk')
| -rw-r--r-- | devel/bmake/files/mk/warnings.mk | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/devel/bmake/files/mk/warnings.mk b/devel/bmake/files/mk/warnings.mk new file mode 100644 index 00000000000..680bfcb8797 --- /dev/null +++ b/devel/bmake/files/mk/warnings.mk @@ -0,0 +1,139 @@ +# RCSid: +# $Id: warnings.mk,v 1.1.1.1 2020/05/24 05:35:53 nia Exp $ +# +# @(#) Copyright (c) 2002, Simon J. Gerraty +# +# This file is provided in the hope that it will +# be of use. There is absolutely NO WARRANTY. +# Permission to copy, redistribute or otherwise +# use this file is hereby granted provided that +# the above copyright notice and this notice are +# left intact. +# +# Please send copies of changes and bug-fixes to: +# sjg@crufty.net +# + +.ifndef _w_cflags +# make sure we get the behavior we expect +.MAKE.SAVE_DOLLARS = no + +# Any number of warnings sets can be added. +.-include <warnings-sets.mk> + +# Modest defaults - put more elaborate sets in warnings-sets.mk +# -Wunused etc are here so you can set +# W_unused=-Wno-unused etc. +MIN_WARNINGS?= -Wall \ + -Wformat \ + -Wimplicit \ + -Wunused \ + -Wuninitialized + +LOW_WARNINGS?= ${MIN_WARNINGS} -W -Wstrict-prototypes -Wmissing-prototypes + +MEDIUM_WARNINGS?= ${LOW_WARNINGS} -Werror + +HIGH_WARNINGS?= ${MEDIUM_WARNINGS} \ + -Wcast-align \ + -Wcast-qual \ + -Wparentheses \ + -Wpointer-arith \ + -Wmissing-declarations \ + -Wreturn-type \ + -Wswitch \ + -Wwrite-strings + +EXTRA_WARNINGS?= ${HIGH_WARNINGS} -Wextra + +# The two step default makes it easier to test build with different defaults. +DEFAULT_WARNINGS_SET?= MIN +WARNINGS_SET?= ${DEFAULT_WARNINGS_SET} + +# There is always someone who wants more... +.if !empty(WARNINGS_XTRAS) +${WARNINGS_SET}_WARNINGS += ${WARNINGS_XTRAS} +.endif + +# If you add sets, besure to list them (you don't have to touch this list). +ALL_WARNINGS_SETS+= MIN LOW MEDIUM HIGH EXTRA + +.if !empty(WARNINGS_SET) +.for ws in ${WARNINGS_SET} +.if empty(${ws}_WARNINGS) +.if ${MAKE_VERSION:[1]:C/.*-//} >= 20050530 +.BEGIN: _empty_warnings +_empty_warnings: .PHONY +.else +.BEGIN: +.endif + @echo "ERROR: Invalid: WARNINGS_SET=${ws}" + @echo "ERROR: Try one of: ${ALL_WARNINGS_SETS:O:u}"; exit 1 + +.endif +.endfor +.endif + +# Without -O or if we've set -O0 somewhere - to make debugging more effective, +# we need to turn off -Wuninitialized as otherwise we get a warning that +# -Werror turns into an error. To be safe, set W_uninitialized blank. +_w_cflags= ${CFLAGS} ${CFLAGS_LAST} ${CPPFLAGS} +.if ${_w_cflags:M-O*} == "" || ${_w_cflags:M-O0} != "" +W_uninitialized= +.endif + + +# .for loops have the [dis]advantage of being evaluated when read, +# so adding to WARNINGS_SET[_${MACHINE_ARCH}] after this file is +# read has no effect. +# Replacing the above .for loops with the WARNINGS+= below solves that +# but tiggers a double free bug in bmake-20040118 and earlier. +# Don't try and read this too fast! +# +# The first :@ "loop" handles multiple sets in WARNINGS_SET +# +# In the second :@ "loop", the ::?= noise sets W_foo?=-Wfoo etc +# which makes it easy to turn off override individual flags +# (see W_uninitialized above). +# +# The last bit expands to ${W_foo_${.TARGET:T}:U${W_foo}} +# which is the bit we ultimately want. It allows W_* to be set on a +# per target basis. +# +# NOTE: that we force the target extension to be .o +# + +# define this once, we use it a couple of times below (hence the doubled $$). +M_warnings_list = @s@$${$$s_WARNINGS}@:O:u:@w@$${$${w:C/-(.)/\1_/}::?=$$w} $${$${w:C/-(.)/\1_/}_${MACHINE_ARCH}_${.TARGET:T:R}.o:U$${$${w:C/-(.)/\1_/}_${.TARGET:T:R}.o:U$${$${w:C/-(.)/\1_/}_${MACHINE_ARCH}:U$${$${w:C/-(.)/\1_/}}}}}@ + +# first a list of warnings from the chosen set +_warnings = ${WARNINGS_SET_${MACHINE_ARCH}:U${WARNINGS_SET}:${M_warnings_list}} +# now a list of all -Wno-* overrides not just those defined by WARNINGS_SET +# since things like -Wall imply lots of others. +# this should be a super-set of the -Wno-* in _warnings, but +# just in case... +_no_warnings = ${_warnings:M-Wno-*} ${ALL_WARNINGS_SETS:${M_warnings_list}:M-Wno-*} +# -Wno-* must follow any others +WARNINGS += ${_warnings:N-Wno-*} ${_no_warnings:O:u} + +.ifndef NO_CFLAGS_WARNINGS +# Just ${WARNINGS} should do, but this is more flexible? +CFLAGS+= ${WARNINGS_${.TARGET:T:R}.o:U${WARNINGS}} +.endif + +# it is rather silly that g++ blows up on some warning flags +NO_CXX_WARNINGS+= \ + implicit \ + missing-declarations \ + missing-prototypes \ + nested-externs \ + shadow \ + strict-prototypes + +.for s in ${SRCS:M*.c*:N*.c:N*h} +.for w in ${NO_CXX_WARNINGS} +W_$w_${s:T:R}.o= +.endfor +.endfor + +.endif # _w_cflags |