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Following the logic of the binutils change upstream (the addition of the
new unlink_if_ordinary() function), we update collect2 so that it will
only unlink files if they are 'ordinary' (in other words, a regular file
or a symlink).
This allows us to do fun things like `gcc test.c -o /dev/null` and not
have to worry about the toolchain doing unlink(/dev/null) on us (cause
that sucks huge wang). For example, this is common on a parisc/mips
machine:
# gcc test.c -o /dev/null
/usr/hppa2.0-unknown-linux-gnu/bin/ld: final link failed: Nonrepresentable section on output
collect2: ld returned 1 exit status
# ls /dev/null
ls: /dev/null: No such file or directory
http://bugs.gentoo.org/79836
this has been fixed in upstream gcc via different means
--- gcc/gcc/collect2.c
+++ gcc/gcc/collect2.c
@@ -34,6 +34,12 @@
#if ! defined( SIGCHLD ) && defined( SIGCLD )
# define SIGCHLD SIGCLD
#endif
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#if HAVE_SYS_STAT_H
+#include <sys/stat.h>
+#endif
#ifdef vfork /* Autoconf may define this to fork for us. */
# define VFORK_STRING "fork"
@@ -1574,14 +1603,24 @@
do_wait (prog);
}
-/* Unlink a file unless we are debugging. */
-
+/* Unlink a file unless we are debugging or file is not normal. */
+#ifndef S_ISLNK
+#ifdef S_IFLNK
+#define S_ISLNK(m) (((m) & S_IFMT) == S_IFLNK)
+#else
+#define S_ISLNK(m) 0
+#define lstat stat
+#endif
+#endif
static void
maybe_unlink (const char *file)
{
- if (!debug)
- unlink (file);
- else
+ if (!debug) {
+ struct stat st;
+ if (lstat (file, &st) == 0
+ && (S_ISREG (st.st_mode) || S_ISLNK (st.st_mode)))
+ unlink (file);
+ } else
notice ("[Leaving %s]\n", file);
}
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