Bug in gcc 2.1: volatile function produces warning in C++ code

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1 total messages Started by Niclas Wiberg Thu, 16 Apr 1992 15:44

#435

Author: Niclas Wiberg
Date: Thu, 16 Apr 1992 15:44

67 lines
2713 bytes

Hi, and thank you for a good compiler.

I think I have found a bug in gcc 2.1 which only shows up for C++ programs.
We have sun4 with SunOS 4.1.1B and gcc 2.1.

The following file produces a warning when compiled as a C++ program,
with filename "bad.cc", but not when compiled as a C program, with
filename "good.c":

------------------- bad.cc  &  good.c -----------------------
void volatile abort();

void volatile quit() {
  abort();
}
-------------------------------------------------------------

gcc -c good.c       # does not complain

gcc -c bad.cc       # complains:
bad.cc: In function `void  quit ()':
bad.cc:5: warning: `volatile' function does return



----------------- Compilation with -v -----------------------


gcc -v -c good.c

Reading specs from /usr/local/gnu/lib/gcc-lib/sun4os4/2.1/specs
gcc version 2.1
 /usr/local/gnu/lib/gcc-lib/sun4os4/2.1/cpp -lang-c -v -undef -D__GNUC__=2   \\
-Dsparc -Dsun -Dunix -D__sparc__ -D__sun__ -D__unix__ -D__sparc -D__sun      \\
-D__unix good.c /usr/tmp/cca00679.i
GNU CPP version 2.1 (sparc)
 /usr/local/gnu/lib/gcc-lib/sun4os4/2.1/cc1 /usr/tmp/cca00679.i -quiet       \\
-dumpbase good.c -version -o /usr/tmp/cca00679.s
GNU C version 2.1 (sparc) compiled by GNU C version 2.1.
 /usr/local/gnu/lib/gcc-lib/sun4os4/2.1/as -o good.o /usr/tmp/cca00679.s



gcc -v -c bad.cc

Reading specs from /usr/local/gnu/lib/gcc-lib/sun4os4/2.1/specs
gcc version 2.1
 /usr/local/gnu/lib/gcc-lib/sun4os4/2.1/cpp -lang-c++ -v -undef -D__GNUC__=2 \\
-D__GNUG__=2 -D__cplusplus -Dsparc -Dsun -Dunix -D__sparc__ -D__sun__        \\
-D__unix__ -D__sparc -D__sun -D__unix bad.cc /usr/tmp/cca00683.i
GNU CPP version 2.1 (sparc)
 /usr/local/gnu/lib/gcc-lib/sun4os4/2.1/cc1plus /usr/tmp/cca00683.i -quiet   \\
-dumpbase bad.cc -version -o /usr/tmp/cca00683.s
GNU C++ version 2.1 (sparc) compiled by GNU C version 2.1.
bad.cc: In function `void  quit ()':
bad.cc:5: warning: `volatile' function does return
 /usr/local/gnu/lib/gcc-lib/sun4os4/2.1/as -o bad.o /usr/tmp/cca00683.s



Hope you can use this,

----------------------------------------------------------------------
Niclas Wiberg                         nicwi@isy.liu.se
Dept. of EE    Linkoping University   Sweden

Hope you can use this

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