I've been using VRPC RISC OS 4.39 and GCCSDK GCC 4.1.1 pre-release 2.
Standard ouput is getting lost after a system call, if file redirection is
used. For example, in the following, "abc" works as expected, but "abc >
out" loses the second printf output:
*type c.abc
#include <stdio.h>
#include <stdlib.h>
int main(void) {
printf("1\n");
if (system("gcc --version")!=0) printf("system error\n");
printf("2\n");
return 0;
}
*
*gcc -o abc abc.c
*
*abc
1
gcc (GCC) 4.1.1 (GCCSDK GCC 4.1.1 pre-release 2)
Copyright (C) 2006 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
2
*
*abc > out
*type out
1
gcc (GCC) 4.1.1 (GCCSDK GCC 4.1.1 pre-release 2)
Copyright (C) 2006 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
The same thing happens with release 1. With pre-release 1 it seems to work.
I get:
*abc
1
gcc (GCC) 4.1.1 (GCCSDK GCC 4.1.1 Prerelease 1)
Copyright (C) 2006 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
2
*
*abc > out
gcc (GCC) 4.1.1 (GCCSDK GCC 4.1.1 Prerelease 1)
Copyright (C) 2006 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*type out
1
2
*
I'm not sure where the output from system() is supposed to go (or even if it
is clearly defined), but the second printf has not been lost.
Regards
Duncan Moore
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