diff --git a/.gitignore b/.gitignore
index 7d871ac..3441262 100644
--- a/.gitignore
+++ b/.gitignore
@@ -134,3 +134,11 @@
 /rust-1.26.0-x86_64-unknown-linux-gnu.tar.xz
 /rustc-1.27.1-src.tar.xz
 /rustc-1.27.2-src.tar.xz
+/rustc-1.28.0-src.tar.xz
+/rust-1.27.2-aarch64-unknown-linux-gnu.tar.xz
+/rust-1.27.2-armv7-unknown-linux-gnueabihf.tar.xz
+/rust-1.27.2-i686-unknown-linux-gnu.tar.xz
+/rust-1.27.2-powerpc64le-unknown-linux-gnu.tar.xz
+/rust-1.27.2-powerpc64-unknown-linux-gnu.tar.xz
+/rust-1.27.2-s390x-unknown-linux-gnu.tar.xz
+/rust-1.27.2-x86_64-unknown-linux-gnu.tar.xz
diff --git a/rust-52760-test_loading_atoi.patch b/rust-52760-test_loading_atoi.patch
new file mode 100644
index 0000000..77ddf13
--- /dev/null
+++ b/rust-52760-test_loading_atoi.patch
@@ -0,0 +1,62 @@
+From efa11da26a882aaf57f7eae747e48d128c474bf3 Mon Sep 17 00:00:00 2001
+From: Josh Stone <jistone@redhat.com>
+Date: Thu, 26 Jul 2018 17:20:02 -0700
+Subject: [PATCH] rustc_metadata: test loading atoi instead of cos
+
+Some platforms don't actually have `libm` already linked in the test
+infrastructure, and then `dynamic_lib::tests::test_loading_cosine` would
+fail to find the "cos" symbol.  Every platform running this test should
+have `libc` and "atoi" though, so try to use that symbol instead.
+
+Fixes #45410.
+---
+ src/librustc_metadata/dynamic_lib.rs | 25 ++++++++++++-------------
+ 1 file changed, 12 insertions(+), 13 deletions(-)
+
+diff --git a/src/librustc_metadata/dynamic_lib.rs b/src/librustc_metadata/dynamic_lib.rs
+index d7da0d00012e..182a071277ec 100644
+--- a/src/librustc_metadata/dynamic_lib.rs
++++ b/src/librustc_metadata/dynamic_lib.rs
+@@ -90,30 +90,29 @@ mod tests {
+     use std::mem;
+ 
+     #[test]
+-    fn test_loading_cosine() {
++    fn test_loading_atoi() {
+         if cfg!(windows) {
+             return
+         }
+ 
+-        // The math library does not need to be loaded since it is already
+-        // statically linked in
+-        let libm = match DynamicLibrary::open(None) {
++        // The C library does not need to be loaded since it is already linked in
++        let lib = match DynamicLibrary::open(None) {
+             Err(error) => panic!("Could not load self as module: {}", error),
+-            Ok(libm) => libm
++            Ok(lib) => lib
+         };
+ 
+-        let cosine: extern fn(libc::c_double) -> libc::c_double = unsafe {
+-            match libm.symbol("cos") {
+-                Err(error) => panic!("Could not load function cos: {}", error),
+-                Ok(cosine) => mem::transmute::<*mut u8, _>(cosine)
++        let atoi: extern fn(*const libc::c_char) -> libc::c_int = unsafe {
++            match lib.symbol("atoi") {
++                Err(error) => panic!("Could not load function atoi: {}", error),
++                Ok(atoi) => mem::transmute::<*mut u8, _>(atoi)
+             }
+         };
+ 
+-        let argument = 0.0;
+-        let expected_result = 1.0;
+-        let result = cosine(argument);
++        let argument = CString::new("1383428980").unwrap();
++        let expected_result = 0x52757374;
++        let result = atoi(argument.as_ptr());
+         if result != expected_result {
+-            panic!("cos({}) != {} but equaled {} instead", argument,
++            panic!("atoi({:?}) != {} but equaled {} instead", argument,
+                    expected_result, result)
+         }
+     }
diff --git a/rust-52876-const-endianess.patch b/rust-52876-const-endianess.patch
new file mode 100644
index 0000000..1e844e8
--- /dev/null
+++ b/rust-52876-const-endianess.patch
@@ -0,0 +1,26 @@
+From 1ea2765918d1212a07e1359537470c477d82a681 Mon Sep 17 00:00:00 2001
+From: Josh Stone <jistone@redhat.com>
+Date: Mon, 30 Jul 2018 13:08:56 -0700
+Subject: [PATCH] run-pass/const-endianness: negate before to_le()
+
+`const LE_I128` needs parentheses to negate the value *before* calling
+`to_le()`, otherwise it doesn't match the operations performed in the
+black-boxed part of the test.  This only makes a tangible difference on
+big-endian targets.
+---
+ src/test/run-pass/const-endianess.rs | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/src/test/run-pass/const-endianess.rs b/src/test/run-pass/const-endianess.rs
+index fa34b49210a6..95c738d3ec49 100644
+--- a/src/test/run-pass/const-endianess.rs
++++ b/src/test/run-pass/const-endianess.rs
+@@ -25,7 +25,7 @@ fn main() {
+     #[cfg(not(target_arch = "asmjs"))]
+     {
+         const BE_U128: u128 = 999999u128.to_be();
+-        const LE_I128: i128 = -999999i128.to_le();
++        const LE_I128: i128 = (-999999i128).to_le();
+         assert_eq!(BE_U128, b(999999u128).to_be());
+         assert_eq!(LE_I128, b(-999999i128).to_le());
+     }
diff --git a/rust.spec b/rust.spec
index 7008c60..e537606 100644
--- a/rust.spec
+++ b/rust.spec
@@ -9,10 +9,10 @@
 # e.g. 1.10.0 wants rustc: 1.9.0-2016-05-24
 # or nightly wants some beta-YYYY-MM-DD
 # Note that cargo matches the program version here, not its crate version.
-%global bootstrap_rust 1.27.0
+%global bootstrap_rust 1.27.2
 %global bootstrap_cargo 1.27.0
 %global bootstrap_channel %{bootstrap_rust}
-%global bootstrap_date 2018-06-21
+%global bootstrap_date 2018-07-20
 
 # Only the specified arches will use bootstrap binaries.
 #global bootstrap_arches %%{rust_arches}
@@ -56,7 +56,7 @@
 
 Name:           rust
 Version:        %{rustc_version}
-Release:        0.1.beta.14%{?dist}
+Release:        3%{?dist}
 Summary:        The Rust Programming Language
 License:        (ASL 2.0 or MIT) and (BSD and MIT)
 # ^ written as: (rust itself) and (bundled libraries)
@@ -70,6 +70,12 @@ ExclusiveArch:  %{rust_arches}
 %endif
 Source0:        https://static.rust-lang.org/dist/%{rustc_package}.tar.xz
 
+# https://github.com/rust-lang/rust/pull/52760
+Patch1:         rust-52760-test_loading_atoi.patch
+
+# https://github.com/rust-lang/rust/pull/52876
+Patch2:         rust-52876-const-endianess.patch
+
 # Get the Rust triple for any arch.
 %{lua: function rust_triple(arch)
   local abi = "gnu"
@@ -148,6 +154,9 @@ BuildRequires:  cmake >= 2.8.11
 %if 0%{?epel}
 %global llvm llvm5.0
 %endif
+%if 0%{?fedora} >= 29
+%global llvm llvm6.0
+%endif
 %if %defined llvm
 %global llvm_root %{_libdir}/%{llvm}
 %else
@@ -168,7 +177,7 @@ BuildRequires:  procps-ng
 BuildRequires:  gdb
 
 # TODO: work on unbundling these!
-Provides:       bundled(libbacktrace) = 6.1.0
+Provides:       bundled(libbacktrace) = 8.1.0
 Provides:       bundled(miniz) = 1.16~beta+r1
 
 # Virtual provides for folks who attempt "dnf install rustc"
@@ -187,8 +196,8 @@ Requires:       /usr/bin/cc
 %global _privatelibs lib(.*-[[:xdigit:]]*|rustc.*)[.]so.*
 %global __provides_exclude ^(%{_privatelibs})$
 %global __requires_exclude ^(%{_privatelibs})$
-%global __provides_exclude_from ^%{_docdir}/.*$
-%global __requires_exclude_from ^%{_docdir}/.*$
+%global __provides_exclude_from ^(%{_docdir}|%{rustlibdir}/src)/.*$
+%global __requires_exclude_from ^(%{_docdir}|%{rustlibdir}/src)/.*$
 
 # While we don't want to encourage dynamic linking to Rust shared libraries, as
 # there's no stable ABI, we still need the unallocated metadata (.rustc) to
@@ -368,6 +377,9 @@ test -f '%{local_rust_root}/bin/rustc'
 
 %setup -q -n %{rustc_package}
 
+%patch1 -p1
+%patch2 -p1
+
 %if "%{python}" == "python3"
 sed -i.try-py3 -e '/try python2.7/i try python3 "$@"' ./configure
 %endif
@@ -446,6 +458,7 @@ export LIBGIT2_SYS_USE_PKG_CONFIG=1
   %{enable_debuginfo} \
   --enable-extended \
   --enable-vendor \
+  --enable-verbose-tests \
   --release-channel=%{channel}
 
 %{python} ./x.py build
@@ -484,6 +497,9 @@ find %{buildroot}%{_libdir} -maxdepth 1 -type f -name '*.so' \
 # Remove installer artifacts (manifests, uninstall scripts, etc.)
 find %{buildroot}%{rustlibdir} -maxdepth 1 -type f -exec rm -v '{}' '+'
 
+# Remove backup files from %%configure munging
+find %{buildroot}%{rustlibdir} -type f -name '*.orig' -exec rm -v '{}' '+'
+
 # FIXME: __os_install_post will strip the rlibs
 # -- should we find a way to preserve debuginfo?
 
@@ -637,8 +653,14 @@ rm -f %{buildroot}%{rustlibdir}/etc/lldb_*.py*
 
 
 %changelog
-* Thu Jul 26 2018 Josh Stone <jistone@redhat.com> - 1.28.0-0.1.beta.14
-- beta test
+* Mon Aug 13 2018 Josh Stone <jistone@redhat.com> - 1.28.0-3
+- Use llvm6.0 instead of llvm-7 for now
+
+* Tue Aug 07 2018 Josh Stone <jistone@redhat.com> - 1.28.0-2
+- Rebuild for LLVM ppc64/s390x fixes
+
+* Thu Aug 02 2018 Josh Stone <jistone@redhat.com> - 1.28.0-1
+- Update to 1.28.0.
 
 * Tue Jul 24 2018 Josh Stone <jistone@redhat.com> - 1.27.2-4
 - Update to 1.27.2.
diff --git a/sources b/sources
index a832ad6..d8ca02f 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (rustc-1.27.2-src.tar.xz) = 3a54d5d04512a454bb6ccc1e05e513ba36051555c4acfb3b99e072cd3a113f66533c5d39410eb3ababd6e79fb2f16b0e569a45597e82ec2158b585e8aec60407
+SHA512 (rustc-1.28.0-src.tar.xz) = a4885cd42a1006738cca2f0d8c0d5e4fd4014fc4629cbf691935bd36ffb896c553717022e67532359b5f1bd8e5050fc38b9dffed7c45cc76f7089ec134dfb980
diff --git a/sources-bootstrap b/sources-bootstrap
index 8336a9d..7540dd1 100644
--- a/sources-bootstrap
+++ b/sources-bootstrap
@@ -1,8 +1,8 @@
-SHA512 (rustc-1.27.2-src.tar.xz) = 3a54d5d04512a454bb6ccc1e05e513ba36051555c4acfb3b99e072cd3a113f66533c5d39410eb3ababd6e79fb2f16b0e569a45597e82ec2158b585e8aec60407
-SHA512 (rust-1.26.0-aarch64-unknown-linux-gnu.tar.xz) = 731e1db2e39d412997cee3d8d51a9d45a84e7092f1c66524f311f4967f7638964581a8c71a5937a7f80a8e0bae153298a6a806e56e525015ab7caf7b040b14b7
-SHA512 (rust-1.26.0-armv7-unknown-linux-gnueabihf.tar.xz) = 5766dbba6f4faae3e8dfd1d98ea948e3835d5b1c28b8daf6c734afd7f27301aa857147eb28762462f77c9da539aae2a81319f194154245abd5cdae7067f24d6c
-SHA512 (rust-1.26.0-i686-unknown-linux-gnu.tar.xz) = 1257f9edefc49ee1742c3acd666d15f077c4d999a82dfe0d574df5c41981c3f716adf86b23d96cf9a6757508aea92abcbe06ad9e3bec2cb4ac19512d60ebba31
-SHA512 (rust-1.26.0-powerpc64le-unknown-linux-gnu.tar.xz) = 9b856967cb94e3d930877d9b28bd9ae2e223a15a15231315f02bfd9c47ad488461b1a55458a6e3f1c9c9a8367c0c3af5ff1dc19d29f3b3debe9baaf2e1b64701
-SHA512 (rust-1.26.0-powerpc64-unknown-linux-gnu.tar.xz) = 62e8acd65b9e56e3d3cc46c5d9984b9c80ef83d7204c3f87dbce9a1229ef19db39ed14154fda4416c1656103f82e106b19ba709943d94d408e11283470a94908
-SHA512 (rust-1.26.0-s390x-unknown-linux-gnu.tar.xz) = f78b8be5c7a2c1c07527959c4c57cfb0fc43ef79fa313eb8c1afd1fc024753fac17f0001f930b651035c1e704ee391d822ddf588a242dc75cc476b3f20dea682
-SHA512 (rust-1.26.0-x86_64-unknown-linux-gnu.tar.xz) = 457503fea324251a92f25d0d45f1e2ac7d342a6a8f52d1abe93a579c7ae9b7f453a707d353e82614b37790747e8551f9762188ee25ff883495598cbf17b3f97e
+SHA512 (rustc-1.28.0-src.tar.xz) = a4885cd42a1006738cca2f0d8c0d5e4fd4014fc4629cbf691935bd36ffb896c553717022e67532359b5f1bd8e5050fc38b9dffed7c45cc76f7089ec134dfb980
+SHA512 (rust-1.27.2-aarch64-unknown-linux-gnu.tar.xz) = 84022350f1e8fc34a353a09848333424a557ddea3b9445a1a5fc9d2f2abced942154e80888ab4091174d6d83c6766f583ef240ab2e2233de5d536633d2765040
+SHA512 (rust-1.27.2-armv7-unknown-linux-gnueabihf.tar.xz) = afa6469ebc851b1c4f3911434504c52d6fb0e2f9779048fa6217cce65cbf8fdd9f3ba990dc8f0e99371040b32ee304e88bfbf27604385c6d3216e0ca44f200a1
+SHA512 (rust-1.27.2-i686-unknown-linux-gnu.tar.xz) = e17960120bdd18a527c0783ce8ca8d76cdc9b436f36a73a82fd2ea709b253f33feeb88310fab7a86305bad403eb5dad7ea43d0e5bc5ad1e3847f29e85040303a
+SHA512 (rust-1.27.2-powerpc64le-unknown-linux-gnu.tar.xz) = 4993430b97f348620338524dbd5f64c6b662cfca51ce1616902e48e08babc0287f6b0db73e13b0ce478a60c98b17f3878c35a33823692fa0e37e265797bb661f
+SHA512 (rust-1.27.2-powerpc64-unknown-linux-gnu.tar.xz) = 21d90f1e71f99e2bf11ba795e76eb428e88d6ac2cb0197f7111e3a4923fa2896b9f41bd54cac5c43329a3d03484d5441e3b8aad599164c69a0c99e08a7ecac15
+SHA512 (rust-1.27.2-s390x-unknown-linux-gnu.tar.xz) = f6ee1e3c41c2602064377262fe74b39b0908a3fb8995c71a7b02ea8c8f0fe6909ffc7ee953e6b0865793d3a8e577096c85d9d9ce51388bb52d7fdc11fcb9db46
+SHA512 (rust-1.27.2-x86_64-unknown-linux-gnu.tar.xz) = 14861392dad81d2c040d0deb64d5dd34652d5cc2875e404609a0f13c8fb6bdc38f9bc7b1e309829365a00c42b610f2b7a73cffa232ecfdf0618b5508a8667198