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nixpkgs/pkgs/stdenv/darwin/darwin-secure-format.patch
Dan Peebles 0419452113 Fix Darwin stdenv to work on 10.13
The main changes are in libSystem, which lost the coretls component in 10.13
and some hardening changes that quietly crash any program that uses %n in
a non-constant format string, so we've needed to patch a lot of programs that
use gnulib.
2017-07-11 21:56:38 -04:00

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Diff

With format string strictness, High Sierra also enforces that %n isn't used
in dynamic format strings, but we should just disable its use on darwin in
general.
--- a/lib/vasnprintf.c 2017-06-22 15:19:15.000000000 -0700
+++ b/lib/vasnprintf.c 2017-06-22 15:20:20.000000000 -0700
@@ -4869,7 +4869,7 @@ VASNPRINTF (DCHAR_T *resultbuf, size_t *
#endif
*fbp = dp->conversion;
#if USE_SNPRINTF
-# if !(((__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 3)) && !defined __UCLIBC__) || ((defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__))
+# if !defined(__APPLE__) && !(((__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 3)) && !defined __UCLIBC__) || ((defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__))
fbp[1] = '%';
fbp[2] = 'n';
fbp[3] = '\0';