From 0d3e9f35690a885eae4b5c69df4943ae6cc81c75 Mon Sep 17 00:00:00 2001 From: Steven Bosscher Date: Thu, 10 Feb 2005 13:14:02 +0000 Subject: [PATCH] re PR preprocessor/19309 (Wrong documentation of predefined __GNUC__ with cpp invocation) PR documentation/19309 * doc/cpp.texi: The __GNUC__ and related predefined macros are also defined for the "standalone" cpp. Some non-GCC compilers may also define __GNUC__. From-SVN: r94805 --- gcc/ChangeLog | 7 +++++++ gcc/doc/cpp.texi | 8 ++++---- 2 files changed, 11 insertions(+), 4 deletions(-) diff --git a/gcc/ChangeLog b/gcc/ChangeLog index dfef24b7a887..e2c251a5a5d9 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,10 @@ +2005-02-10 Steven Bosscher + + PR documentation/19309 + * doc/cpp.texi: The __GNUC__ and related predefined macros + are also defined for the "standalone" cpp. + Some non-GCC compilers may also define __GNUC__. + 2005-02-10 Jakub Jelinek PR c/19342 diff --git a/gcc/doc/cpp.texi b/gcc/doc/cpp.texi index 40b310bec83d..ea38218b8c14 100644 --- a/gcc/doc/cpp.texi +++ b/gcc/doc/cpp.texi @@ -1927,16 +1927,16 @@ These macros are defined by all GNU compilers that use the C preprocessor: C, C++, and Objective-C@. Their values are the major version, minor version, and patch level of the compiler, as integer constants. For example, GCC 3.2.1 will define @code{__GNUC__} to 3, -@code{__GNUC_MINOR__} to 2, and @code{__GNUC_PATCHLEVEL__} to 1. They -are defined only when the entire compiler is in use; if you invoke the -preprocessor directly, they are not defined. +@code{__GNUC_MINOR__} to 2, and @code{__GNUC_PATCHLEVEL__} to 1. These +macros are also defined if you invoke the preprocessor directly. @code{__GNUC_PATCHLEVEL__} is new to GCC 3.0; it is also present in the widely-used development snapshots leading up to 3.0 (which identify themselves as GCC 2.96 or 2.97, depending on which snapshot you have). If all you need to know is whether or not your program is being compiled -by GCC, you can simply test @code{__GNUC__}. If you need to write code +by GCC, or a non-GCC compiler that claims to accept the GNU C dialects, +you can simply test @code{__GNUC__}. If you need to write code which depends on a specific version, you must be more careful. Each time the minor version is increased, the patch level is reset to zero; each time the major version is increased (which happens rarely), the