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> |
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> The gawk source distribution comes with a number of such extensions in the |
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> (doh) extensions/ directory. filefuncs.c is such one extension, which |
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> demonstrate how to add stat() and chdir() capabilities to awk. |
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> The file is compiled into a .so file, which is then referenced from within |
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> gawk to make the extended commands available. |
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> |
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> A vanilla build of gawk does not have any dynamic extension. |
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> |
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> |
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> Now, the Gentoo devs at some point in the past (very early) took that file |
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> (filefuncs.c) and extended it to implement new commands like "symlink", |
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> "unlink", "mkdir", "rmdir" and "stat", so those are callable from within |
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> awk, effectively extending the language. (you can see the Gentoo copyright |
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> in the file, look |
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> into /usr/portage/sys-apps/gawk/files/filefuncs/filefuncs.c) |
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> |
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> There are a number of Gentoo system scripts that use those awk extensions |
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> (look into /lib/rcscripts and /lib/rcscripts/awk), which means that |
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> compiling the expanded filefuncs.c (not the vanilla one) is mandatory on a |
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> Gentoo system, because there are awk scripts that rely on the extended |
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> functionaltiy provided by it. Hence Gentoo maintains the filefuncs.c file |
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> independently, and the gawk ebuild, besides building gawk itself, also takes |
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> care of building filefuncs.c containing the extensions. |
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> |
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> |
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Thank you very much. That is the best explanation a read to this. It |
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should be deliverd with the sources. |
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|
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Still the procedure is unusual. They could apply a patch to |
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extensions/ filefuncs.c and exclude it for vanilla. |
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|
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I have a second issue. When compiling gawk on Cygwin, where is no |
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windows kernel, the Gentoo version of filefuncs breaks. I have to |
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disable it in the ebuild to get gawk compiled. |
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|
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filefuncs.o:filefuncs.c:(.text+0x1e): undefined reference to `_make_builtin' |
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[... lots of this ... ] |
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filefuncs.o:filefuncs.c:(.text+0x10f1): undefined reference to `_update_ERRNO' |
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collect2: ld returned 1 exit status |
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make: *** [filefuncs.so.0.0.1] Error 1 |
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|
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You say it is mandatory on a Gentoo system, because there are awk |
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scripts that rely on. Do this functions break because of the missing |
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kernel? What would be the workaround? |
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|
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Thanks |
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|
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Al |
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