Make under win7 breaks

[Michael Stahl]

On 19.02.2015 11:27, Juergen Funk Mailinglist wrote:
> 
> checking whether D:/dev/cygwin/opt/lo/bin/make sets $(MAKE)...
> ./configure: eval: line 1853: unexpected EOF while looking for matching `"'
> ./configure: eval: line 1854: syntax error: unexpected end of file
> 
> D:/src/lo/lo-core/external/jpeg-turbo/ExternalProject_jpeg-turbo.mk:26:
> recipe for target
> 'D:/src/lo/lo-core/workdir/ExternalProject/jpeg-turbo/configure' failed
> 
> make[1]: ***
> [D:/src/lo/lo-core/workdir/ExternalProject/jpeg-turbo/configure] Error 1
> 

after finally installing visual studio 2013 on the weekend i've had the
same problem, and it turns out that the AC_PROG_MAKE_SET check looks
different in jpeg-turbo than every other bundled external because
jpeg-turbo is using very old autoconf version and (according to the
changelog) the check was rewritten in autoconf 2.61a; master commit
9c6ce47eaf1a891edf7c200145de400fd1cf2871 should work around the issue.