gcc47, gcc48: mudflap does not work

[akimd (Akim Demaille)]

GCC is not properly installed with mudflap support (neither 4.7 nor 4.8).

$ cat foo.c
int
main ()
{
  return 0;
}
$ gcc-mp-4.7 -fmudflap foo.c
cc1: fatal error: mf-runtime.h: No such file or directory
compilation terminated.

[ryandesign (Ryan Carsten Schmidt)]

From what I can tell, mudflap has been around far longer than version 4.7 hasn't it?

[akimd (Akim Demaille)]

Yes. I don't know exactly when it was introduced, but for instance in ​http://gcc.gnu.org/gcc-4.1/changes.html the following sentence shows that it already exists:

Some built-in functions have been fortified to protect them against various buffer overflow (and format string) vulnerabilities. Compared to the mudflap bounds checking feature, the safe builtins have far smaller overhead. This means that programs built using safe builtins should not experience any measurable slowdown.

[cooljeanius (Eric Gallager)]

Mudflap has been removed as of gcc 4.9, as it has been replaced by the sanitizers.

[cooljeanius (Eric Gallager)]

Cc Me!