To: DJGPP AT SUN DOT SOE DOT CLARKSON DOT EDU
Subject: invisible CPP-Warning -> CC1-Error ?
From: pfulmek AT email DOT tuwien DOT ac DOT at (Paul FULMEK)
Reply-To: pfulmek AT email DOT tuwien DOT ac DOT at
Date: Thu, 10 Mar 1994 18:09:57 +0000

I had some problems with a nasty little invisible warning that
resulted in an error.
When I tried to compile a little program the following output was
produced:

gcc -m486 -ansi -pedantic -v -Wall -g -c my.c -o my.o
Reading specs from D:/GNU.111/lib/specs
gcc version 2.5.7
 D:/GNU.111/bin/cpp.exe -lang-c -v -undef -D__GNUC__=2 -D__GNUC_MINOR__=5
   -trigraphs -$ -D__STRICT_ANSI__ -D__unix__ -D__i386__ -D__GO32__
   -D__MSDOS__ -D__unix -D__i386 -D__GO32 -D__MSDOS -g -Wall -pedantic
   my.c D:/TEMP/cc000105
GNU CPP version 2.5.7 (80386, BSD syntax)
#include "..." search starts here:
#include <...> search starts here:
 d:/gnu.111/include
 d:/gnu.111/contrib/libgrx/include
 /usr/local/include
 /usr/local/go32/include
 /usr/local/lib/gcc-lib/go32/2.5.7/include
 /usr/include
End of search list.
 D:/GNU.111/bin/cc1.exe D:/TEMP/cc000105 -fno-builtin -quiet -dumpbase
 my.c -m486 -g -Wall -pedantic -ansi -version -o D:/TEMP/cca00105
GNU C version 2.5.7 (80386, BSD syntax) compiled by GNU C version 2.5.7.
D:/TEMP/cc000105:1: parse error before `file'

GCC.EXE deleted the temporary files so i couldn't find out
why and where the error has occured.
When i invoked CPP.EXE and CC1.EXE (with the commandlines from
above) myself, the output of CPP revealed the following WARNING:

D:/TEMP/ccout:
>In file included from my.c:3:
>const_11.h:47: warning: file does not end in newline

Simply inserting a newline at the end of CONST_11.H solved the problem.

Why does a warning from CPP cause an error-message from CC1?
Why doesn't GCC tell me anything about this warning ( -v -Wall )?
Can I suppress the automatic deletion of the temporary files in the
case of an error? - This would have helped a lot to
localize the source of the error-message.

Paul

--

Technische Universitaet Wien
Institut fuer Werkstoffe der Elektrotechnik
Dipl.-Ing. Paul FULMEK
Tel. (+43 222) 58801/3955
FAX: (+43 222) 50 41 587
Gusshausstrasse 27-29
Austria - 1040 WIEN