1# $NetBSD: deptgt-posix.mk,v 1.4 2022/05/07 21:24:52 rillig Exp $ 2# 3# Tests for the special target '.POSIX', which enables POSIX mode. 4# 5# As of 2022-04-18, when parsing the dependency line '.POSIX', the variable 6# '%POSIX' is defined and <posix.mk> is included, if it exists. Other than 7# that, POSIX support is still incomplete, the exact set of supported features 8# needs to be cross-checked with the POSIX specification. 9# 10# At the point of '.POSIX:', <sys.mk> has been loaded already, unless the 11# option '-r' was given. This means that an implementation of <posix.mk> must 12# work both with and without the system rules from <sys.mk> being in effect. 13# 14# Implementation note: this test needs to run isolated from the usual tests 15# directory to prevent unit-tests/posix.mk from interfering with the posix.mk 16# from the system directory that this test uses; since at least 1997, the 17# directive '.include <file>' has been looking in the current directory first 18# before searching the file in the system search path, as described in 19# https://gnats.netbsd.org/15163. 20# 21# See also: 22# https://pubs.opengroup.org/onlinepubs/9699919799/utilities/make.html 23 24TESTTMP= ${TMPDIR:U/tmp}/make.test.deptgt-posix 25SYSDIR= ${TESTTMP}/sysdir 26MAIN_MK= ${TESTTMP}/main.mk 27INCLUDED_MK= ${TESTTMP}/included.mk 28 29all: .PHONY 30.SILENT: 31 32set-up-sysdir: .USEBEFORE 33 mkdir -p ${SYSDIR} 34 printf '%s\n' > ${SYSDIR}/sys.mk \ 35 'CC=sys-cc' \ 36 'SEEN_SYS_MK=yes' 37 printf '%s\n' > ${SYSDIR}/posix.mk \ 38 'CC=posix-cc' 39 40check-is-posix: .USE 41 printf '%s\n' >> ${MAIN_MK} \ 42 '.if $${CC} != "posix-cc"' \ 43 '. error' \ 44 '.endif' \ 45 '.if $${%POSIX} != "1003.2"' \ 46 '. error' \ 47 '.endif' \ 48 'all: .PHONY' 49 50check-not-posix: .USE 51 printf '%s\n' >> ${MAIN_MK} \ 52 '.if $${CC} != "sys-cc"' \ 53 '. error' \ 54 '.endif' \ 55 '.if defined(%POSIX)' \ 56 '. error' \ 57 '.endif' \ 58 'all: .PHONY' 59 60check-not-seen-sys-mk: .USE 61 printf '%s\n' >> ${MAIN_MK} \ 62 '.if defined(SEEN_SYS_MK)' \ 63 '. error' \ 64 '.endif' 65 66run: .USE 67 (cd "${TESTTMP}" && MAKEFLAGS=${MAKEFLAGS.${.TARGET}:Q} ${MAKE} \ 68 -m "${SYSDIR}" -f ${MAIN_MK:T}) 69 rm -rf ${TESTTMP} 70 71# If the main makefile has a '.for' loop as its first non-comment line, a 72# strict reading of POSIX 2018 makes the makefile non-conforming. 73all: after-for 74after-for: .PHONY set-up-sysdir check-not-posix run 75 printf '%s\n' > ${MAIN_MK} \ 76 '# comment' \ 77 '' \ 78 '.for i in once' \ 79 '.POSIX:' \ 80 '.endfor' 81 82# If the main makefile has an '.if' conditional as its first non-comment line, 83# a strict reading of POSIX 2018 makes the makefile non-conforming. 84all: after-if 85after-if: .PHONY set-up-sysdir check-not-posix run 86 printf '%s\n' > ${MAIN_MK} \ 87 '# comment' \ 88 '' \ 89 '.if 1' \ 90 '.POSIX:' \ 91 '.endif' 92 93# If the main makefile first includes another makefile and that included 94# makefile tries to switch to POSIX mode, that's too late. 95all: in-included-file 96in-included-file: .PHONY set-up-sysdir check-not-posix run 97 printf 'include included.mk\n' > ${MAIN_MK} 98 printf '.POSIX:\n' > ${INCLUDED_MK} 99 100# If the main makefile switches to POSIX mode in its very first line, before 101# and comment lines or empty lines, that works. 102all: in-first-line 103in-first-line: .PHONY set-up-sysdir check-is-posix run 104 printf '%s\n' > ${MAIN_MK} \ 105 '.POSIX:' 106 107# The only allowed lines before switching to POSIX mode are comment lines. 108# POSIX defines comment lines as "blank lines, empty lines, and lines with 109# <number-sign> ('#') as the first character". 110all: after-comment-lines 111after-comment-lines: .PHONY set-up-sysdir check-is-posix run 112 printf '%s\n' > ${MAIN_MK} \ 113 '# comment' \ 114 '' \ 115 '.POSIX:' 116 117# Running make with the option '-r' skips the builtin rules from <sys.mk>. 118# In that mode, '.POSIX:' just loads <posix.mk>, which works as well. 119MAKEFLAGS.no-builtins= -r 120all: no-builtins 121no-builtins: .PHONY set-up-sysdir check-is-posix check-not-seen-sys-mk run 122 printf '%s\n' > ${MAIN_MK} \ 123 '.POSIX:' 124