[Bug ld/5652] New: genscripts.sh fails with BASH_LINENO

[vincent dot riviere at freesbee dot fr]

When compiling the binutils on some systems, the ld link fails. The reason is 
that the generated emulation C file is empty.
By looking at the make output, we can see
.../genscripts.sh: line 403: ${BASH_LINENO[0]} + 1: bad substitution
However, no error is detected, and the build process of ld continues until the 
final link, which fails.

This happens when $(SHELL) is actually bash compiled with the --enable-minimal-
config option. In that case, the variable BASH is set, but the array 
BASH_LINENO is not supported.

The problem is at the bottom of ld/genscripts.sh
If it is supported by the shell, line number information is inserted into the 
generated emulation source, by using BASH_LINENO. However the detection method 
is wrong. It assumes that if the BASH variable is set, the BASH_LINENO array 
will be available, which is not always true.

-- 
           Summary: genscripts.sh fails with BASH_LINENO
           Product: binutils
           Version: 2.19 (HEAD)
            Status: NEW
          Severity: normal
          Priority: P2
         Component: ld
        AssignedTo: unassigned at sources dot redhat dot com
        ReportedBy: vincent dot riviere at freesbee dot fr
                CC: bug-binutils at gnu dot org


http://sourceware.org/bugzilla/show_bug.cgi?id=5652

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