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{{Infobox_Tool |
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|name=GNU Archiver |
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|website=http://www.gnu.org/software/binutils/ |
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}} |
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GNU '''ar''' is a utility that archives a series of files and is part of the [[binutils]] package. It is used to take a group of files, and combine them all into one. This allows one to then compress, send, or most importantly and commonly, link the files into a program. |
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You have many object files and your linking line for a program in your OS grows longer and longer? GNU AR helps. |
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== Usage == |
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It creates archives of object files alongside with a table of the symbols, which each object file (==member) sports. |
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The tool itself is about as simple as its purpose. To archive a series of object files: |
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Then, to link against them: |
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<syntaxhighlight lang="bash">cc example.c archive.a -o example.bin</syntaxhighlight> |
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| ⚫ | '''Important''': If you link other object files besides the library ''archive.a'', take care that the ''archive.a'' is right behind these object files (or have it be the very last file in the list of files to link) - so the linker can resolve the one or other occurrence of a symbol which is covered by some member of the ''archive.a'' library. |
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You link your program's object file against =crt0.o= and the =archive.a= file. |
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== See Also == |
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| ⚫ | Important: If you link other object files besides the library |
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=== Articles === |
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See also the [GNU 'ar' online manual | http://www.gnu.org/software/binutils/manual/html_chapter/binutils_1.html]. |
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* [[binutils]] |
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* [[LD|ld]] |
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=== External Links === |
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* [https://sourceware.org/binutils/docs/binutils/ar.html#ar GNU 'ar' online manual]. |
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[[Category:Binutils]] |
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Latest revision as of 04:34, 9 June 2024
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|
GNU Archiver | |
| [[Image:{{{image}}}|300px|]] | |
| Website: | http://www.gnu.org/software/binutils/ |
GNU ar is a utility that archives a series of files and is part of the binutils package. It is used to take a group of files, and combine them all into one. This allows one to then compress, send, or most importantly and commonly, link the files into a program.
Usage
The tool itself is about as simple as its purpose. To archive a series of object files:
ar -rcs archive.a obj_fil1.o obj_fil2.o obj_fil3.o obj_fil4.o ... obj_filN.o
Then, to link against them:
cc example.c archive.a -o example.bin
Important: If you link other object files besides the library archive.a, take care that the archive.a is right behind these object files (or have it be the very last file in the list of files to link) - so the linker can resolve the one or other occurrence of a symbol which is covered by some member of the archive.a library.