124 lines
3.9 KiB
Makefile
124 lines
3.9 KiB
Makefile
# $NetBSD: deptgt-posix.mk,v 1.4 2022/05/07 21:24:52 rillig Exp $
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#
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# Tests for the special target '.POSIX', which enables POSIX mode.
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#
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# As of 2022-04-18, when parsing the dependency line '.POSIX', the variable
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# '%POSIX' is defined and <posix.mk> is included, if it exists. Other than
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# that, POSIX support is still incomplete, the exact set of supported features
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# needs to be cross-checked with the POSIX specification.
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#
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# At the point of '.POSIX:', <sys.mk> has been loaded already, unless the
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# option '-r' was given. This means that an implementation of <posix.mk> must
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# work both with and without the system rules from <sys.mk> being in effect.
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#
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# Implementation note: this test needs to run isolated from the usual tests
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# directory to prevent unit-tests/posix.mk from interfering with the posix.mk
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# from the system directory that this test uses; since at least 1997, the
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# directive '.include <file>' has been looking in the current directory first
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# before searching the file in the system search path, as described in
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# https://gnats.netbsd.org/15163.
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#
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# See also:
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# https://pubs.opengroup.org/onlinepubs/9699919799/utilities/make.html
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TESTTMP= ${TMPDIR:U/tmp}/make.test.deptgt-posix
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SYSDIR= ${TESTTMP}/sysdir
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MAIN_MK= ${TESTTMP}/main.mk
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INCLUDED_MK= ${TESTTMP}/included.mk
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all: .PHONY
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.SILENT:
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set-up-sysdir: .USEBEFORE
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mkdir -p ${SYSDIR}
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printf '%s\n' > ${SYSDIR}/sys.mk \
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'CC=sys-cc' \
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'SEEN_SYS_MK=yes'
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printf '%s\n' > ${SYSDIR}/posix.mk \
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'CC=posix-cc'
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check-is-posix: .USE
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printf '%s\n' >> ${MAIN_MK} \
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'.if $${CC} != "posix-cc"' \
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'. error' \
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'.endif' \
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'.if $${%POSIX} != "1003.2"' \
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'. error' \
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'.endif' \
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'all: .PHONY'
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check-not-posix: .USE
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printf '%s\n' >> ${MAIN_MK} \
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'.if $${CC} != "sys-cc"' \
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'. error' \
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'.endif' \
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'.if defined(%POSIX)' \
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'. error' \
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'.endif' \
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'all: .PHONY'
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check-not-seen-sys-mk: .USE
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printf '%s\n' >> ${MAIN_MK} \
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'.if defined(SEEN_SYS_MK)' \
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'. error' \
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'.endif'
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run: .USE
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(cd "${TESTTMP}" && MAKEFLAGS=${MAKEFLAGS.${.TARGET}:Q} ${MAKE} \
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-m "${SYSDIR}" -f ${MAIN_MK:T})
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rm -rf ${TESTTMP}
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# If the main makefile has a '.for' loop as its first non-comment line, a
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# strict reading of POSIX 2018 makes the makefile non-conforming.
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all: after-for
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after-for: .PHONY set-up-sysdir check-not-posix run
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printf '%s\n' > ${MAIN_MK} \
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'# comment' \
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'' \
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'.for i in once' \
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'.POSIX:' \
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'.endfor'
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# If the main makefile has an '.if' conditional as its first non-comment line,
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# a strict reading of POSIX 2018 makes the makefile non-conforming.
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all: after-if
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after-if: .PHONY set-up-sysdir check-not-posix run
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printf '%s\n' > ${MAIN_MK} \
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'# comment' \
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'' \
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'.if 1' \
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'.POSIX:' \
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'.endif'
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# If the main makefile first includes another makefile and that included
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# makefile tries to switch to POSIX mode, that's too late.
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all: in-included-file
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in-included-file: .PHONY set-up-sysdir check-not-posix run
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printf 'include included.mk\n' > ${MAIN_MK}
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printf '.POSIX:\n' > ${INCLUDED_MK}
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# If the main makefile switches to POSIX mode in its very first line, before
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# and comment lines or empty lines, that works.
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all: in-first-line
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in-first-line: .PHONY set-up-sysdir check-is-posix run
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printf '%s\n' > ${MAIN_MK} \
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'.POSIX:'
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# The only allowed lines before switching to POSIX mode are comment lines.
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# POSIX defines comment lines as "blank lines, empty lines, and lines with
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# <number-sign> ('#') as the first character".
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all: after-comment-lines
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after-comment-lines: .PHONY set-up-sysdir check-is-posix run
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printf '%s\n' > ${MAIN_MK} \
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'# comment' \
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'' \
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'.POSIX:'
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# Running make with the option '-r' skips the builtin rules from <sys.mk>.
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# In that mode, '.POSIX:' just loads <posix.mk>, which works as well.
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MAKEFLAGS.no-builtins= -r
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all: no-builtins
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no-builtins: .PHONY set-up-sysdir check-is-posix check-not-seen-sys-mk run
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printf '%s\n' > ${MAIN_MK} \
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'.POSIX:'
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