Date: Mon, 21 Jun 2010 00:44:25 GMT From: Garrett Cooper <gcooper@FreeBSD.org> To: freebsd-gnats-submit@FreeBSD.org Subject: bin/148024: Some built-in AT&T/POSIX compat make variables are broken Message-ID: <201006210044.o5L0iPXK000857@www.freebsd.org> Resent-Message-ID: <201006210050.o5L0o1pu031120@freefall.freebsd.org>
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>Number: 148024 >Category: bin >Synopsis: Some built-in AT&T/POSIX compat make variables are broken >Confidential: no >Severity: serious >Priority: medium >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Mon Jun 21 00:50:01 UTC 2010 >Closed-Date: >Last-Modified: >Originator: Garrett Cooper >Release: 9-CURRENT >Organization: Cisco Systems, Inc. >Environment: FreeBSD bayonetta.local 9.0-CURRENT FreeBSD 9.0-CURRENT #0 r206173M: Mon Apr 26 22:45:06 PDT 2010 root@bayonetta.local:/usr/obj/usr/src/sys/BAYONETTA.ata amd64 >Description: I'm trying to convert some GNU makefiles over to a POSIX compliant form, and it appears that our copy of make is broken in that respect. Example: $ cat ~/Makefile.prereq bar: foo: bar @echo target: $@ prereq: $< $ make -f ~/Makefile.prereq foo target: foo prereq: The above invocation should have printed out: target: foo prereq: bar Furthermore, even though FreeBSD's version of pmake claims to drop this support as per the manpage for backwards compatibility with AT&T... .ALLSRC The list of all sources for this target; also known as `>'. .ARCHIVE The name of the archive file; also known as `!'. .IMPSRC The name/path of the source from which the target is to be transformed (the ``implied'' source); also known as `<'. .MEMBER The name of the archive member; also known as `%'. .OODATE The list of sources for this target that were deemed out-of- date; also known as `?'. .PREFIX The file prefix of the file, containing only the file portion, no suffix or preceding directory components; also known as `*'. .TARGET The name of the target; also known as `@'. and POSIX specifies that these variables should exist, they don't function in our version of make: The five internal macros are: $@ The $@ shall evaluate to the full target name of the current target, or the archive filename part of a library archive target. It shall be evaluated for both target and inference rules. For example, in the .c.a inference rule, $@ represents the out-of-date .a file to be built. Similarly, in a makefile target rule to build lib.a from file.c, $@ represents the out-of-date lib.a. $% The $% macro shall be evaluated only when the current target is an archive library member of the form libname( member .o). In these cases, $@ shall evaluate to libname and $% shall evaluate to member .o. The $% macro shall be evaluated for both target and inference rules. For example, in a makefile target rule to build lib.a( file.o), $% represents file.o, as opposed to $@, which represents lib.a. $? The $? macro shall evaluate to the list of prerequisites that are newer than the current target. It shall be evaluated for both target and inference rules. For example, in a makefile target rule to build prog from file1.o, file2.o, and file3.o, and where prog is not out-of-date with respect to file1.o, but is out-of-date with respect to file2.o and file3.o, $? represents file2.o and file3.o. $< In an inference rule, the $< macro shall evaluate to the filename whose existence allowed the inference rule to be chosen for the target. In the .DEFAULT rule, the $< macro shall evaluate to the current target name. The meaning of the $< macro shall be otherwise unspecified. For example, in the .c.a inference rule, $< represents the prerequisite .c file. $* The $* macro shall evaluate to the current target name with its suffix deleted. It shall be evaluated at least for inference rules. For example, in the .c.a inference rule, $*.o represents the out-of-date .o file that corresponds to the prerequisite .c file See http://www.opengroup.org/onlinepubs/009695399/utilities/make.html for more details. >How-To-Repeat: See above testcase. >Fix: Looking at fixing this. >Release-Note: >Audit-Trail: >Unformatted:
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