Reset file name and line number in preprocessor

Question

We are using Sun Studio 12u1 on Solaris x86 10u9.
For one of our large projects our make file copies many C++ source files into one large allsource.cpp file. This results in significantly faster compilation and better inter-procedural optimizations.
Unfortunately, when the compiler generates warning or error messages they refer to allsource.cpp. Also when it comes time to debug, dbx is looking for debugging information for the original source file instead of looking for allsource.o.
On Windows (MSVC), we use the #line directive to reset the line number and filename so that the error messages point to the correct line and number, and so that the debugger knows that the debugging information for myfile.cpp is actually in allsource.o.
Does the Sun compiler have anything similar to the #line directive?

Answer 1

To reset the preprocessor to the start of a new file:
#1 "filename"
where filename is the name or complete path name of the file.
To change the line number within the current file:
#N
or
#line N
where N is an integer
Example:
% cat z.cc
struct S { X x; };
#1 "/foo/bar.h"
Int I;
#500
Float F;
#line 1000
Double D;
88% CC -c z.cc
"z.cc", line 1: Error: Type name expected instead of "X".
"/foo/bar.h", line 1: Error: Int is not defined.
"/foo/bar.h", line 500: Error: Float is not defined.
"/foo/bar.h", line 1000: Error: Double is not defined.
4 Error(s) detected.BTW, you might get a similar improvement in compile time by using precompiled headers.
The -xipo option provide inter-procedural optimization across compilation units. Refer to the C++ Users Guide for details.
We seem to have a bug in the Forum software. My original source code and the compiler output have double quotes ("...") but they show as single quotes in the code brackets.
Edited by: clamage45 on Apr 13, 2010 1:13 PM