X-Git-Url: https://git.xonotic.org/?p=xonotic%2Fgmqcc.git;a=blobdiff_plain;f=doc%2Fgmqcc.1;h=60257dc444b9645fe100f213d000f2ca3412437e;hp=59afdb99dd85abc5bce9239c2697ecbe2e968cf0;hb=69b55ccc03b56af1f6c05eb45866ab198307487f;hpb=c34f5d20ed8f1b83e7eadd3dab0956ede4398f3a

diff --git a/doc/gmqcc.1 b/doc/gmqcc.1
index 59afdb9..60257dc 100644
--- a/doc/gmqcc.1
+++ b/doc/gmqcc.1
@@ -24,10 +24,6 @@ there are also traditional long-options available.
 .Bl -tag -width Ds
 .It Fl h , Fl -help
 Show a usage message and exit.
-.It Fl "debug"
-Turn on some compiler debugging mechanisms.
-.It Fl memchk
-Turn on compiler mem-check. (Shows allocations and checks for leaks.)
 .It Fl o , Fl -output= Ns Ar filename
 Specify the output filename. Defaults to progs.dat. This will overwrite
 the output file listed in a
@@ -46,7 +42,7 @@ Minimal optimization level
 Disable optimization entirely
 .El
 .Pp
-.It Fl O Ns Ar name Fl Ono- Ns Ar name
+.It Fl O Ns Ar name , Fl Ono- Ns Ar name
 Enable or disable a specific optimization. Note that these options
 must be used after setting the optimization level, otherwise they'll
 be overwritten.
@@ -57,6 +53,8 @@ activated at.
 Be less verbose. In particular removes the messages about which files
 are being processed, and which compilation mode is being used, and
 some others. Warnings and errors will of course still be displayed.
+.It Fl D Ns Ar macroname , Fl D Ns Ar macroname Ns = Ns Ar value
+Predefine a macro, optionally with a optional value.
 .It Fl E
 Run only the preprocessor as if
 .Fl f Ns Cm ftepp
@@ -93,6 +91,12 @@ Use an ini file to read all the
 and
 .Fl f
 flag from. See the
+.It Fl "debug"
+Turn on some compiler debugging mechanisms.
+.It Fl memchk
+Turn on compiler mem-check. (Shows allocations and checks for leaks.)
+.It Fl -memdumpcols Ns Ar columns
+Changes the number of columns to use for the debug memory dump, defaults to 16.
 .Sx CONFIG
 section about the file format.
 .It Fl redirout= Ns Ar file
@@ -347,15 +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
@@ -480,6 +497,15 @@ void vafunc(string...count) {
 Most Quake VMs, including the one from FTEQW or up till recently
 Darkplaces, do not cope well with vector instructions with overlapping
 input and output. This option will avoid producing such code.
+.It Fl f Ns Cm expressions-for-builtins
+Usually builtin-numbers are just immediate constants. With this flag
+expressions can be used, as long as they are compile-time constant.
+.Pp
+Example:
+.Bd -literal -offset indent
+void printA() = #1; // the usual way
+void printB() = #2-1; // with a constant expression
+.Ed
 .El
 .Sh OPTIMIZATIONS
 .Bl -tag -width Ds