#1962: Glibc fails to build using dash
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Reporter: [EMAIL PROTECTED] | Owner: [EMAIL PROTECTED]
Type: defect | Status: assigned
Priority: normal | Milestone: 6.3
Component: Book | Version: SVN
Severity: normal | Resolution:
Keywords: |
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Changes (by [EMAIL PROTECTED]):
* owner: [email protected] => [EMAIL PROTECTED]
* status: new => assigned
Comment:
Dash advertises itself as a POSIX compatible shell at
http://gondor.apana.org.au/~herbert/dash/. POSIX states:
The following operands shall be supported:
string
A string to be written to standard output. If the first operand is -n,
or if any of the operands contain a backslash ( '\' ) character, the
results are implementation-defined.
Backslash escape sequences, such as '\n' are an XSI extension. Assuming
Dash is POSIX-only and therefore doesn't implement any XSI extensions, any
escape sequences can be treated however Dash sees fit.
Note that under "Application Usage", POSIX says:
It is not possible to use echo portably across all POSIX systems unless
both -n (as the first argument) and escape sequences are omitted.
Patching Glibc to fix these issues is trivial in this case:
{{{
echo "\"Available extensions:\\n\"";
}}}
becomes
{{{
echo '"Available extensions:';
echo '"'
}}}
Note that POSIX also recommends:
New applications are encouraged to use printf instead of echo.
In which case, this becomes:
{{{
printf "%s\n" '"Available extensions:\n"'
}}}
All of this is purely for information only though, as I'm sure there are
many other cases of non-POSIX syntax in Glibc's sources and they won't
entertain such patches anyway.
We'll just go with option number 1 and pass "SHELL=/bin/bash" through to
Glibc's make processes. If any other packages show similar issues, the
same workaround can be applied to them too, making it nice and consistent.
--
Ticket URL: <http://wiki.linuxfromscratch.org/lfs/ticket/1962#comment:3>
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