Specifying which shell to use
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Specifying which shell to use
by Dan Smithers-3
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Is there a way of specifying the shell to ues when running the configure
scripts? I see that the default configure begins #! /bin/sh that specifies to use sh. On my Ubuntu system, this is a link to /bin/dash. If I edit configure by hand to start #! /bin/bash it works. If I leave it pointing to dash it fails to execute the code generated by the intel compiler (icpc). thanks dan _______________________________________________ Autoconf mailing list Autoconf@... http://lists.gnu.org/mailman/listinfo/autoconf |
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Re: Specifying which shell to use
by Warren Young
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Dan Smithers wrote:
> If I edit configure by hand to start > > #! /bin/bash > > it works. You shouldn't be writing configure tests that depend on Bash. The whole point of autoconf is that it lets you test for features on a system whose capabilities you do not yet fully understand. One of those capabilities is exactly how functional the Bourne-style shell is. On some systems, you won't find Bash *at all*, and on others, you will find something that's crippled even by SysVR3 standards. Your tests should cope with all of this, using only as much shell functionality as is available on *all* of the systems you want to port to. _______________________________________________ Autoconf mailing list Autoconf@... http://lists.gnu.org/mailman/listinfo/autoconf |
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Re: Specifying which shell to use
by Bob Friesenhahn
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On Thu, 8 Oct 2009, Warren Young wrote:
> > You shouldn't be writing configure tests that depend on Bash. As a side note, I read some recent Debian news which says that the default shell for Debian GNU Linux will be switched to 'dash'. It seems that they were not happy with the execution performance of the World's Slowest Shell (TM). Bob -- Bob Friesenhahn bfriesen@..., http://www.simplesystems.org/users/bfriesen/ GraphicsMagick Maintainer, http://www.GraphicsMagick.org/ _______________________________________________ Autoconf mailing list Autoconf@... http://lists.gnu.org/mailman/listinfo/autoconf |
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Re: Specifying which shell to use
by Ralf Wildenhues
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Hello Dan,
* Dan Smithers wrote on Thu, Oct 08, 2009 at 05:22:56PM CEST: > Is there a way of specifying the shell to ues when running the configure > scripts? At configure run time? Read `info Autoconf --index CONFIG_SHELL'. > I see that the default configure begins > > #! /bin/sh > > that specifies to use sh. > > On my Ubuntu system, this is a link to /bin/dash. Which shouldn't be a big problem. configure has machinery to either cope with shells, or try to find a better one and use that. > If I edit configure by hand to start > > #! /bin/bash > > it works. If I leave it pointing to dash it fails to execute the code > generated by the intel compiler (icpc). Can you please be more specific here? Show a small configure.ac script that fails, and how it fails, copy and pasting the commands and error messages? Things should work just fine with icpc. Or is it that some of the code that you wrote yourself, not coming from Autoconf, doesn't cope with dash? In that case, the first recommendation is the one you heard from the others: write portable code. If absolutely impossible, there also exists a (currently internal only) API to specify tests that the shell in use must pass in order to be eligible. We could make a public API to _AS_DETECT_REQUIRED, if it's deemed safe enough to use. Thanks, Ralf _______________________________________________ Autoconf mailing list Autoconf@... http://lists.gnu.org/mailman/listinfo/autoconf |
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Re: Specifying which shell to use
by Ralf Wildenhues
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Hello Dan,
please don't top-post, thank you. * Dan Smithers wrote on Mon, Oct 12, 2009 at 03:32:01PM CEST: > When I use CC=gcc and CXX=g++ the configure works and produces a working > Makefile. > > If I set CC=icc and CXX=icpc then the configure fails as shown below. > On my Ubuntu system /bin/sh is a link to /bin/dash > > If I change the first line to > #! /bin/bash > then the build works using either gcc or icc. How old is this system? Which version is the (d)ash on this system? > If I run configure on a Redhat 7.3 machine then it works correctly (but > /bin/sh is a link to /bin/bash). Redhat 7.3 is quite old, which makes me suspicious of the above. > The problem comes before I get to my code in the autotools bit. The problem looks like a segfault in either dash, or the program generated by your compiler. Cheers, Ralf _______________________________________________ Autoconf mailing list Autoconf@... http://lists.gnu.org/mailman/listinfo/autoconf |
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