From 1a915c7bf71fbcef0b7eeadba5e224a5886ea429 Mon Sep 17 00:00:00 2001 From: Wolfgang Bumiller Date: Wed, 24 Apr 2013 17:42:48 +0200 Subject: [PATCH] manpage: document and explain __FUNC__ and __NULL__ --- doc/gmqcc.1 | 19 ++++++++++++++++--- 1 file changed, 16 insertions(+), 3 deletions(-) diff --git a/doc/gmqcc.1 b/doc/gmqcc.1 index da79a5b..56728d1 100644 --- a/doc/gmqcc.1 +++ b/doc/gmqcc.1 @@ -351,15 +351,28 @@ __RANDOM__ __RANDOM_LAST__ __DATE__ __TIME__ +__FUNC__ .Ed .Pp +Note that +.Li __FUNC__ +is not actually a preprocessor macro, but is recognized by the parser +even with the preprocessor disabled. +.Pp Note that fteqcc also defines .Li __NULL__ -which is not implemented yet. +which becomes the first global. Assigning it to a vector does not +yield the same result as in gmqcc where +.Li __NULL__ +is defined to +.Li nil (See .Fl f Ns Cm untyped-nil -about gmqcc's alternative to -.Li __NULL__ Ns ). +), which will cause the vector to be zero in all components. With fteqcc +only the first component will be 0, while the other two will become +the first to of the global return value. This behavior is odd and +relying on it should be discouraged, and thus is not supported by +gmqcc. .It Fl f Ns Cm relaxed-switch Allow switch cases to use non constant variables. .It Fl f Ns Cm short-logic -- 2.39.2