Re: [Emacs-diffs] master 100e339: Update from gnulib

[Ken Brown <kbrown@cornell.edu>]

On 2/1/2018 12:21 PM, Paul Eggert wrote:
> +# if defined __CYGWIN__
> +/* The 'environ' variable is defined in a DLL. Therefore its declaration needs
> +   the '__declspec(dllimport)' attribute, but the system's <unistd.h> lacks it.
> +   This leads to a link error on 64-bit Cygwin when the option
> +   -Wl,--disable-auto-import is in use.  */
> +_GL_EXTERN_C __declspec(dllimport) char **environ;
> +# endif

This breaks the build on 32-bit Cygwin.  The build fails as follows:

   CCLD     make-docfile.exe
/tmp/ccZciFa6.o: In function `main':
/home/kbrown/src/emacs/i686/lib-src/../../master/lib-src/emacsclient.c:1740: 
undefined reference to `_imp__environ'
collect2: error: ld returned 1 exit status

Bruno is aware of the issue; I first noticed it while building clisp and 
reported it there.  But I thought I should report it here too in case 
others bump into it.

Ken