I ran into an incompatibility between <dejagnu.h> and GCC 5 (or, at
least, current trunk of gcc), in which the inline functions in dejagnu.h
can't be seen at link time:
$ cat ../../test-dg-api.c
#include <dejagnu.h>
int
main (int argc, char **argv)
{
pass ("got here");
return 0;
}
With gcc r216247 onwards:
$ ./xgcc -B. \
../../test-dg-api.c -o test-dg-api
/tmp/ccc7PdfM.o: In function `main':
test-dg-api.c:(.text+0x21): undefined reference to `pass'
collect2: error: ld returned 1 exit status
and the generated asm doesn't contain an implementation of "pass".
I filed it as https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63613
It turns out to be because gcc 5 is changing the default mode for C from
-std=gnu89 to -std=gnu11.
Quoting a comment in the bug report:
> That means dejagnu.h assumes the GNU inline semantics, but
> doesn't use __gnu_inline__ attribute. So, either compile with
> -fgnu89-inline, or get dejagnu.h fixed.
Indeed, adding "-fgnu89-inline" to the gcc invocation fixes the issue:
$ ./xgcc -B. \
-fgnu89-inline \
../../test-dg-api.c -o test-dg-api
$ ./test-dg-api
PASSED: got here
Hope this is helpful
Dave
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