[patch] to libstdc++-v3: fix for the Bourne shell

[Gabriel Dos Reis]

msokolov@ivan.Harhan.ORG (Michael Sokolov) writes:

| (Resend, the first one got to gcc-patches but not to libstdc++ due to a
|  mistyped To: address. It's hard to remember that the library is libstdc++-v3,
|  but the list is libstdc++. :-)
| 
| Hi there,
| 
| There is a Bourne shell portability bug in libstdc++-v3's configure
| (acinclude.m4 actually). The GLIBCPP_CHECK_GNU_MAKE macro uses ${MAKE:-make}.
| This is not supported by the Bourne shell and prevents libstdc++-v3 from
| building on UNIX. The patch below changes it to the standard Bourne shell
| ${MAKE-make}.


This is OK.  
(I can't check it in because I'm not at location where I can do check-ins)

-- Gaby
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