ax_c_declare_block
==================

Synopsis
********

     AX_C_DECLARE_BLOCK

Description
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The macro will compile a test program to see whether the compiler does allow new variable declarations in the middle of a C statement block, i.e. after some non-declaration line. New compilers will allow that which makes the behave a bit more like C++ - the gcc did support it for quite a time already.

#define DECLARE_BLOCK_NEEDED says they need to be at the beginning of of a statement block. Additionlly two defines DECLARE_BLOCK { and DECLARE_END } are being set. That makes it possible to do the following in your source code (which this macro is really made up for):

      #define ___ DECLARE_BLOCK
      #define ____ DECLARE_END

      int f() {
       char buffer[1024];
       fgets(buffer, 1024, stdin);
       ___ int i; int ii = strlen(buffer);
       for (i=0; i < ii; i++) {
          fputc(buffer[i], stdout);
       }____;
      }

Source Code
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Download the latest version of ax_c_declare_block.m4 (http://git.savannah.gnu.org/gitweb/?p=autoconf-archive.git;a=blob_plain;f=m4/ax_c_declare_block.m4) or browse the macro's revision history (http://git.savannah.gnu.org/gitweb/?p=autoconf-archive.git;a=history;f=m4/ax_c_declare_block.m4).

License
*******

Copyright © 2008 Guido U. Draheim guidod@gmx.de

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version.

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