Article View: comp.sys.ibm.pc.rt
Article #867Re: cpp problem on RS6000
From: Eng-Shien Wu/16000000
Date: Fri, 31 Aug 1990 23:25
Date: Fri, 31 Aug 1990 23:25
52 lines
2649 bytes
2649 bytes
The Risc System/6000 uses an ANSI-compatible cpp where the following
line is not legal:
/**/ #it thinks this is a macro statement, because they can start anywhere
The solution is to use the cpp in /usr/lpp/X11/Xamples/util/cpp/cpp.
An excerpt from the document "Porting 4.3 BSD Programs to AIX Version 3.1":
---------------------------------------------------------------------------
5.2. /lib/cpp
/lib/cpp is not the Kernighan & Ritchie cpp. In-
stead, it is the same preprocessor as the AIXv3.1
C compiler uses, but externalized, and it uses a
default language level of extended. For example,
/lib/cpp does not have to start preprocessor mac-
ros in the first column (mandated by ANSI C), but
any text after an #endif is ignored (not allowed
by ANSI C). The flags -tp -B/path/ can be used as
compiler arguments to cause /path/cpp to be used
for preprocessing the source file (see below).
For example, to compile a single C source program,
file.c, using /lib/cpp instead of the C compiler's
built-in preprocessor, use:
cc -tp -B/lib/ file.c
See the InfoExplorer documentation in Appendix A.
of the XL C Reference Manual for more information
about language levels.
5.3. Kernighan & Ritchie cpp
Because there are many programs, specifically X11
programs, that rely on the behavior of the K&R C
preprocessor, this has been provided in
/usr/lpp/X11/Xamples/util/cpp/cpp. To get this
used as the C preprocessor, you need to have the
X11 Development LPP installed and invoke it
directly, use the flags -tp
-B/usr/lpp/X11/Xamples/util/cpp/ with the com-
piler, or modify the /etc/xlc.cfg stanza as men-
tioned above.
---------------------------------------------------------------------------
-- Eng-Shien Wu, "My views only"
X Windows, IBM Advanced Workstations Div, Austin, Texas
Internet: eswu@ub.cc.umich.edu VNET: ausvmq(engshien)
Technical Details
Message-ID:
<3344@awdprime.UUCP>Path:
arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!mailrus!cs.utexas.edu!romp!auschs!awdprime!engshien!eswuReferences:
<1990Aug31.184126.26314@caen.engin.umich.edu>Show Full Headers
Complete Article Headers
Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!mailrus!cs.utexas.edu!romp!auschs!awdprime!engshien!eswu From: eswu@engshien.uucp (Eng-Shien Wu/16000000) Newsgroups: comp.sys.ibm.pc.rt Subject: Re: cpp problem on RS6000 Keywords: cpp, RIOS Message-ID: <3344@awdprime.UUCP> Date: 31 Aug 90 23:25:33 GMT References: <1990Aug31.184126.26314@caen.engin.umich.edu> Sender: news@awdprime.UUCP Reply-To: eswu@ub.cc.umich.edu Distribution: usa Organization: IBM AWD, Austin, TX Lines: 52