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STR #2919
| Application: | FLTK Library |
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| Status: | 1 - Closed w/Resolution |
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| Priority: | 1 - Request for Enhancement, e.g. asking for a feature |
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| Scope: | 3 - Applies to all machines and operating systems |
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| Subsystem: | Build Files |
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| Summary: | The build system fails to build against needed libraries |
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| Version: | 1.3-feature |
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| Created By: | RedDwarf |
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| Assigned To: | AlbrechtS |
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| Fix Version: | 1.3.4 |
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| Update Notification: | |
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Trouble Report Files:
Trouble Report Comments:
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| #1 | RedDwarf
05:00 Jan 17, 2013 |
| The attached patch makes the linker create all the DT_NEEDED entries that each library requires.
It additionally adds to DSOCOMMAND:
* "-Wl,--as-needed" so no unneeded DT_NEEDED entries are created
* "-Wl,--no-undefined" so an error is reported if a new library is ever needed and you forgot to link against it
Notice that the \$(LDLIBS) in DSOCOMMAND has no effect since. From GNU ld man page: "The linker will search an archive only once, at the location where it is specified on the command line. If the archive defines a symbol which was undefined in some object which appeared before the archive on the command line, the linker will include the appropriate file(s) from the archive. *****However, an undefined symbol in an object appearing later on the command line will not cause the linker to search the archive again *****."
Apparently the last part is not always enforced. But it is when using -Wl,--as-needed (and users can use it even if it's not there by default). | |
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| #2 | cand
07:27 Aug 21, 2014 |
| I've applied the Makefile parts. The linker commands cannot just be unconditionally added, as neither is widely supported by older GNU ld or linkers from other vendors. | |
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| #3 | AlbrechtS
07:39 Aug 08, 2016 |
| Fixed in Subversion repository.
There are four parts in this request (thanks for the patch, BTW.):
(1) Makefile: done by Lauri (cand).
(2) Linker flag "-Wl,--no-undefined": added with compatibility test some time ago.
(3) Linker flag "-Wl,--as-needed": will not be added. Please file another STR if you believe that this should still be added.
(4) configure: same changes as in configure.in, because configure is a generated file. No need to change.
So everything except (3) is done now. Please file another STR if you believe that this should still be added.
Closing this STR now. | |
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