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bash: loadable builtins
- From: "Yaakov (Cygwin/X)" <yselkowitz at users dot sourceforge dot net>
- To: cygwin at cygwin dot com
- Date: Tue, 07 Aug 2012 02:37:50 -0500
- Subject: bash: loadable builtins
Eric,
As there was a question on this in IRC tonight, it is possible to make
bash loadable builtins work on Cygwin.
1) In src_compile(), add
LOCAL_LDFLAGS='-Wl,--export-all,--out-implib,lib$(@:.exe=.dll.a)' to the
final cygmake command.
2) In src_install(), add the following immediately after cyginstall:
dolib libbash.dll.a
cd ${S}
includeinto bash
doinclude [^y]*.h builtins/*.h include/*.h lib/{glob,tilde}/*.h
${B}/[^y]*.h
3) Builtins are compiled with `gcc -shared -I/usr/include/bash -o
foo.dll foo.c -lbash'
4) The builtin can then be loaded with enable -f foo.dll foo etc.
The only caveat is that this will only work with bash.exe, not sh.exe,
but as the latter should only be used with portable code, IMO that's a
reasonable restriction.
HTH,
Yaakov
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