obtained gcc-4.6.4.tar.bz2 from upstream website;upstream

verified gcc-4.6.4.tar.bz2.sig;
imported gcc-4.6.4 source tree from verified upstream tarball.

downloading a git-generated archive based on the 'upstream' tag
should provide you with a source tree that is binary identical
to the one extracted from the above tarball.

if you have obtained the source via the command 'git clone',
however, do note that line-endings of files in your working
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1 files changed, 80 insertions, 0 deletions

diff --git a/gcc/testsuite/g++.dg/other/pr20366.C b/gcc/testsuite/g++.dg/other/pr20366.C
new file mode 100644
index 000000000..36a689ebf
--- /dev/null
+++ b/gcc/testsuite/g++.dg/other/pr20366.C
@@ -0,0 +1,80 @@
+// Test fix for PR20366
+// 
+// { dg-do compile  { target *-*-aix* } }
+// { dg-options "-D_LARGE_FILES" }
+//
+// cstdio includes stdio.h and undefs most of the functions declared
+// therein, unfortunately this means that #define fopen fopen64 goes
+// away. This tests the fix, and ensures that with -D_LARGE_FILES
+// fopen et. al. are indeed aliased to the large file equivalents.
+//
+// There are many other #define foo foo64 in the AIX headers, but
+// these all work out fine as they are not undefined in libstdc++.
+// This list is probably incomplete:
+//
+// Symbol          Return type     Large file declaration.
+// 
+// aio.h                      (different for different AIX versions)
+// =====
+// aio_read        int        aio_read64(int, struct aiocb64 *);
+// aio_write       int        aio_write64(int, struct aiocb64 *);
+// lio_listio      int        lio_listio64(int, struct liocb64 *[], int, void *);
+// aio_cancel      int        aio_cancel64(int, struct aiocb64 *);
+// aio_suspend     int        aio_suspend64(int, struct aiocb64 *[]);
+// 
+// stdio.h
+// =======
+// fgetpos         int        fgetpos64(FILE *, fpos64_t *);
+// fopen           FILE      *fopen64(const char *, const char *);
+// freopen         FILE      *freopen64(const char *, const char *, FILE *);
+// fseeko          int        fseeko64(FILE *, off64_t, int);
+// fsetpos         int        fsetpos64(FILE *, const fpos64_t *);
+// ftello          off64_t    ftello64(FILE *);
+// 
+// unistd.h
+// ========
+// fclear          off64_t    fclear64(int, off64_t);
+// fsync_range     int        fsync_range64(int, int, off64_t, off64_t);
+// ftruncate       int        ftruncate64(int, off64_t);
+// truncate        int        truncate64(const char *, off64_t);
+// lseek           off64_t    lseek64(int, off64_t, int);
+// pread           ssize_t    pread64(int, void *, size_t, off64_t);
+// pwrite          ssize_t    pwrite64(int, const void *, size_t, off64_t);
+// 
+// fcntl.h
+// =======
+// open            int        open64(const char *, int, ...);
+// creat           int        creat64(const char *, mode_t);
+// 
+// sys/stat.h
+// ==========
+// stat            int        stat64(const char *, struct stat64 *);
+// fstat           int        fstat64(int, struct stat64 *);
+// lstat           int        lstat64(const char *, struct stat64 *);
+// 
+// stdlib.h
+// ========
+// mkstemp         int        mkstemp64(char *);
+// 
+// ftw.h
+// =====
+// ftw             int        ftw64(const char *, int (*)(const char *,const struct stat64 *, int), int);
+// nftw            int        nftw64(const char *, int (*)(const char *, const struct stat64 *, int, struct FTW*), int, int);
+//
+// It seems unlikely that any of these will be used (and #undef'ed) by
+// libstdc++ in the future, if they are then this test and its
+// associated patch to fixincludes will have to be revisited.
+
+#include <cstdio>
+
+extern "C" {
+int        fgetpos(FILE *, fpos64_t *);
+FILE      *fopen(const char *, const char *);
+FILE      *freopen(const char *, const char *, FILE *);
+int        fseeko(FILE *, off64_t, int);
+int        fsetpos(FILE *, const fpos64_t *);
+off64_t    ftello(FILE *);
+}
+int main() { 
+  return 0;
+}