View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0001520 | Issue 8 drafts | Shell and Utilities | public | 2021-09-07 09:44 | 2024-06-11 09:12 |
| Reporter | joerg | Assigned To | |||
| Priority | normal | Severity | Comment | Type | Enhancement Request |
| Status | Closed | Resolution | Accepted As Marked | ||
| Product Version | Draft 2.1 | ||||
| Name | Jörg Schilling | ||||
| Organization | |||||
| User Reference | |||||
| Section | make | ||||
| Page Number | 2947-2948 | ||||
| Line Number | 98896-98920 | ||||
| Final Accepted Text | 0001520:0005556 | ||||
| Summary | 0001520: make should support the $^ internal macro | ||||
| Description | The $^ internal macro is supported by major make implementations since many years but it is not mentioned in the POSIX standard. SunPro Make, smake and gmake support $^ with the same meaning since at least 25 years. BSD make supports the same meaning under a different name ($>). BSD make therefore would just need to add an alias for an existing feature which seems to be a minor effort. A possible reason for the missing $^ in POSIX may be that the SunPro Make implementation supports that internal macro since a long time but did not document it for unknown reason, causing the impression this may be a gmake only extension. | ||||
| Desired Action | On page 2947 after line 98895 add: The $^ macro shall evaluate to the list of prerequisites for the current target. It shall be evaluated for both target and inference rules. If the list of prerequisites of the target contains .WAIT pseudo targets, the .WAIT pseudo targets shall not be part of the list expanded from $^. On page 2948 after line 98919 add: $^ member.s2 | ||||
| Tags | issue8 | ||||
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I am sorry, I just see that I was mistaken with the occurence of the .WAIT pseudo target in the list created by $^. It seems that I did not remember my previous test results correctly and the SunPro Make documentation is still incomplete even though I enhance it on a regular base. SunPro Make includes .WAIT in that $^ list. BSD make replaces the first .WAIT by .WAIT_1, the second .WAIT by .WAIT_2, ... and includes that in the $> list. It may thus need a discussion whether we make the exclusion of .WAIT from the $^ list optional. For the SunPro Make case, it would be sufficient to use this: $(^:.WAIT=) instead of jist $^. For this reason, it would make sense to replace: If the list of prerequisites of the target contains .WAIT pseudo targets, the .WAIT pseudo targets shall not be part of the list expanded from $^. by: If the list of prerequisites of the target contains .WAIT pseudo targets, it is unspecified whether .WAIT pseudo targets appear in the list expanded from $^, it is recommended to use $(^:.WAIT=). ... if BSD make would implement $^ in a way that does not modify the .WAIT entries. |
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On page 2946 line 98856 change:shall maintain five internal macrosto: shall maintain a set of internal macros On page 2947 line 98883 change: The five internal macros are:to: The internal macros are: On page 2947 after line 98895 add: $^The $^ macro shall evaluate to the list of prerequisites for the current target. It shall be evaluated for both target and inference rules. If the list of prerequisites of the target contain any .WAIT special targets, the results of expanding $^ are unspecified. On page 2948 after line 98919 add: $^ member.s2 |
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I find it odd that we say "the results of expanding $^ are unspecified" if .WAIT appears. Why should the entire expansion be unspecified? Wouldn't it be more accurate to say something like, the appearance of the .WAIT macros in the results are unspecified? |
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Re 0001520:0005557 Joerg pointed out in 0001520:0005495 that (in $>) BSD make replaces the first .WAIT by .WAIT_1, the second .WAIT by .WAIT_2, and so on. We decided to allow that behaviour so that BSD make can just make $^ an alias for $>. |
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2021-09-07 09:44 | joerg | New Issue | |
| 2021-09-07 09:44 | joerg | Name | => Jörg Schilling |
| 2021-09-07 09:44 | joerg | Section | => make |
| 2021-09-07 09:44 | joerg | Page Number | => 2947-2948 |
| 2021-09-07 09:44 | joerg | Line Number | => 98896-98920 |
| 2021-09-07 09:57 | geoffclare | Description Updated | |
| 2021-09-07 10:39 | joerg | Note Added: 0005495 | |
| 2021-09-07 11:23 | joerg | Note Edited: 0005495 | |
| 2021-09-07 11:36 | joerg | Note Edited: 0005495 | |
| 2021-09-07 11:36 | joerg | Note Edited: 0005495 | |
| 2021-12-16 16:57 | eblake | Relationship added | related to 0001437 |
| 2021-12-16 17:28 | geoffclare | Note Added: 0005556 | |
| 2021-12-16 17:29 | geoffclare | Final Accepted Text | => 0001520:0005556 |
| 2021-12-16 17:29 | geoffclare | Status | New => Resolved |
| 2021-12-16 17:29 | geoffclare | Resolution | Open => Accepted As Marked |
| 2021-12-16 17:29 | geoffclare | Tag Attached: issue8 | |
| 2021-12-16 17:35 | psmith | Note Added: 0005557 | |
| 2021-12-17 12:21 | geoffclare | Note Added: 0005559 | |
| 2022-01-13 10:25 | geoffclare | Status | Resolved => Applied |
| 2022-09-08 15:20 | geoffclare | Relationship added | related to 0000514 |
| 2024-06-11 09:12 | agadmin | Status | Applied => Closed |
