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Re: javacomp: conftest.java is deleted before compiling

From: Eric Blake
Subject: Re: javacomp: conftest.java is deleted before compiling
Date: Fri, 20 Sep 2013 06:43:36 -0600
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On 09/20/2013 01:22 AM, Daiki Ueno wrote:
> Hi,
> Regarding the bug report for gettext:
> https://lists.gnu.org/archive/html/bug-gettext/2013-09/msg00010.html
> javacomp.c has the following code to check if javac can compile some
> Java programs.  First, it writes out some code snippet to a temporary
> file and then call javac command on the written file.  Like this:
>  write_temp_file (tmpdir, conftest_file_name,
>                   get_goodcode_snippet (source_version));

> As fopen_temp uses "D" mode on Windows, which implies the file will be
> deleted on close (fwriteerror_temp here).  Thus, after calling
> write_temp_file, the file will be deleted immediately.  Maybe we should
> use plain fopen/fwriteerror here?

That's not the first time I've encountered a problem with mingw's
temporary files being deleted on close.  See this m4 commit:


So yes, it sounds like we need to avoid temporary files if we want them
to persist past the close.  Are you up to writing a patch along those lines?

Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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