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- Newsgroups: gnu.gcc.bug
- Path: sparky!uunet!cis.ohio-state.edu!la.tce.COM!pierre
- From: pierre@la.tce.COM (Pierre Willard)
- Subject: #define multi-lined strings
- Message-ID: <9209031906.AA17893@_la.tce.com>
- Sender: gnulists@ai.mit.edu
- Reply-To: pierre@la.tce.com
- Organization: GNUs Not Usenet
- Distribution: gnu
- Date: Thu, 3 Sep 1992 19:06:08 GMT
- Approved: bug-gcc@prep.ai.mit.edu
- Lines: 91
-
- There is a bug in the preprocessor of gcc 2.1 and
- gcc-1.40.
-
- It is possible to write a #define which will generate several C lines
- in the preprocessed file. This makes bad line numbers. This happens
- when using a multi-lined string in a #define.
-
- I guess the fix is for cpp to translate a mutli-lined string in a
- #define into a one line string (ie use '\n').
-
- In the example below, cpp should output :
-
- "just\na little\nmulti-lined\nstring"; foo(x)
-
- The following demonstrates the problem.
-
- psi:/usr2/pierre:cat pw.c
-
- #define FOOO x = "just
- a little
- multi-lined
- string"; foo(x)
-
- void
- foo(char *x)
- {
-
- }
-
- main()
- {
- char *x;
-
- FOOO;
- }
- psi:/usr2/pierre:gcc -E pw.c
- # 1 "pw.c"
-
-
-
-
-
-
- void
- foo(char *x)
- {
-
- }
-
- main()
- {
- char *x;
-
- x = "just
- a little
- multi-lined
- string"; foo(x) ;
- # 18 "pw.c"
- }
- psi:/usr2/pierre:gcc -v -g -O -o pw pw.c
- Reading specs from /usr/local/lib/gcc-lib/sun4/2.1/specs
- gcc version 2.1
- /usr/local/lib/gcc-lib/sun4/2.1/cpp -lang-c -v -undef -D__GNUC__=2 -Dsparc -Dsun -Dunix -D__sparc__ -D__sun__ -D__unix__ -D__sparc -D__sun -D__unix -D__OPTIMIZE__ -g pw.c /usr/tmp/cca24573.i
- GNU CPP version 2.1 (sparc)
- /usr/local/lib/gcc-lib/sun4/2.1/cc1 /usr/tmp/cca24573.i -quiet -dumpbase pw.c -g -O -version -o /usr/tmp/cca24573.s
- GNU C version 2.1 (sparc) compiled by GNU C version 2.1.
- as -o pw.o /usr/tmp/cca24573.s
- /usr/local/lib/gcc-lib/sun4/2.1/ld -e start -dc -dp -o pw /lib/crt0.o -L/usr/local/lib/gcc-lib/sun4/2.1/ -L/usr/local/lib/ pw.o -lgcc -lc -lg -lgcc
- psi:/usr2/pierre:gdb pw
- GDB is free software and you are welcome to distribute copies of it
- under certain conditions; type "show copying" to see the conditions.
- There is absolutely no warranty for GDB; type "show warranty" for details.
- GDB 4.5, Copyright 1992 Free Software Foundation, Inc...
- (gdb) b main
- Breakpoint 1 at 0x22cc: file pw.c, line 17.
- (gdb) run
- Starting program: /usr2/pierre/pw
-
- Breakpoint 1, main () at pw.c:17
- 17 FOOO;
- (gdb) n
- Line number 20 out of range; pw.c has 18 lines.
- (gdb) quit
- The program is running. Quit anyway? (y or n) y
- psi:/usr2/pierre:
-
- Let me know your comments.
- Regards
- Pierre Willard
-
-
-