gnu: clang-runtime: Fix build issues against glibc 2.26.

* gnu/packages/patches/clang-runtime-asan-build-fixes.patch,
gnu/packages/patches/clang-runtime-esan-build-fixes.patch: New files.
* gnu/local.mk (dist_patch_DATA): Add them.
* gnu/packages/llvm.scm (clang-runtime-from-llvm): Add 'patches'
parameter and honor it.
(clang-runtime): Pass patch list.
(clang-runtime-3.9.1, clang-runtime-3.7, clang-runtime-3.6)
(clang-runtime-3.5): Likewise.

gnu/local.mk

@@ -576,6 +576,8 @@ dist_patch_DATA =						\
   %D%/packages/patches/chmlib-inttypes.patch			\
   %D%/packages/patches/clang-libc-search-path.patch		\
   %D%/packages/patches/clang-3.8-libc-search-path.patch		\
+  %D%/packages/patches/clang-runtime-asan-build-fixes.patch	\
+  %D%/packages/patches/clang-runtime-esan-build-fixes.patch	\
   %D%/packages/patches/clementine-use-openssl.patch		\
   %D%/packages/patches/clisp-remove-failing-test.patch		\
   %D%/packages/patches/clucene-pkgconfig.patch			\

gnu/packages/llvm.scm

@@ -1,7 +1,7 @@
 ;;; GNU Guix --- Functional package management for GNU
 ;;; Copyright © 2014, 2016 Eric Bavier <bavier@member.fsf.org>
 ;;; Copyright © 2015 Mark H Weaver <mhw@netris.org>
-;;; Copyright © 2015, 2017 Ludovic Courtès <ludo@gnu.org>
+;;; Copyright © 2015, 2017, 2018 Ludovic Courtès <ludo@gnu.org>
 ;;; Copyright © 2016 Dennis Mungai <dmngaie@gmail.com>
 ;;; Copyright © 2016 Ricardo Wurmus <rekado@elephly.net>
 ;;; Copyright © 2017 Roel Janssen <roel@gnu.org>
@@ -98,7 +98,8 @@ of programming tools as well as libraries with equivalent functionality.")
                    "-DLLVM_REQUIRES_RTTI=1")
                  ,flags))))))
 
-(define (clang-runtime-from-llvm llvm hash)
+(define* (clang-runtime-from-llvm llvm hash
+                                  #:optional (patches '()))
   (package
     (name "clang-runtime")
     (version (package-version llvm))
@@ -107,7 +108,8 @@ of programming tools as well as libraries with equivalent functionality.")
        (method url-fetch)
        (uri (string-append "http://llvm.org/releases/"
                            version "/compiler-rt-" version ".src.tar.xz"))
-       (sha256 (base32 hash))))
+       (sha256 (base32 hash))
+       (patches (map search-patch patches))))
     (build-system cmake-build-system)
     (native-inputs (package-native-inputs llvm))
     (inputs
@@ -212,7 +214,8 @@ code analysis tools.")
 (define-public clang-runtime
   (clang-runtime-from-llvm
    llvm
-   "0p0y85c7izndbpg2l816z7z7558axq11d5pwkm4h11sdw7d13w0d"))
+   "0p0y85c7izndbpg2l816z7z7558axq11d5pwkm4h11sdw7d13w0d"
+   '("clang-runtime-asan-build-fixes.patch")))
 
 (define-public clang
   (clang-from-llvm llvm clang-runtime
@@ -235,7 +238,9 @@ code analysis tools.")
 (define-public clang-runtime-3.9.1
   (clang-runtime-from-llvm
    llvm-3.9.1
-   "16gc2gdmp5c800qvydrdhsp0bzb97s8wrakl6i8a4lgslnqnf2fk"))
+   "16gc2gdmp5c800qvydrdhsp0bzb97s8wrakl6i8a4lgslnqnf2fk"
+   '("clang-runtime-asan-build-fixes.patch"
+     "clang-runtime-esan-build-fixes.patch")))
 
 (define-public clang-3.9.1
   (clang-from-llvm llvm-3.9.1 clang-runtime-3.9.1
@@ -257,7 +262,8 @@ code analysis tools.")
 (define-public clang-runtime-3.7
   (clang-runtime-from-llvm
    llvm-3.7
-   "10c1mz2q4bdq9bqfgr3dirc6hz1h3sq8573srd5q5lr7m7j6jiwx"))
+   "10c1mz2q4bdq9bqfgr3dirc6hz1h3sq8573srd5q5lr7m7j6jiwx"
+   '("clang-runtime-asan-build-fixes.patch")))
 
 (define-public clang-3.7
   (clang-from-llvm llvm-3.7 clang-runtime-3.7
@@ -278,7 +284,8 @@ code analysis tools.")
 (define-public clang-runtime-3.6
   (clang-runtime-from-llvm
    llvm-3.6
-   "11qx8d3pbfqjaj2x207pvlvzihbs1z2xbw4crpz7aid6h1yz6bqg"))
+   "11qx8d3pbfqjaj2x207pvlvzihbs1z2xbw4crpz7aid6h1yz6bqg"
+   '("clang-runtime-asan-build-fixes.patch")))
 
 (define-public clang-3.6
   (clang-from-llvm llvm-3.6 clang-runtime-3.6
@@ -301,7 +308,8 @@ code analysis tools.")
 (define-public clang-runtime-3.5
   (clang-runtime-from-llvm
    llvm-3.5
-   "1hsdnzzdr5kglz6fnv3lcsjs222zjsy14y8ax9dy6zqysanplbal"))
+   "1hsdnzzdr5kglz6fnv3lcsjs222zjsy14y8ax9dy6zqysanplbal"
+   '("clang-runtime-asan-build-fixes.patch")))
 
 (define-public clang-3.5
   (clang-from-llvm llvm-3.5 clang-runtime-3.5

gnu/packages/patches/clang-runtime-asan-build-fixes.patch

@@ -0,0 +1,92 @@
+This patch works around build issues in libsanitizer.  Note that we carry the
+same patches for GCC since it includes the same libsanitizer.
+
+Work around this build error on glibc 2.26:
+
+  /tmp/guix-build-clang-runtime-3.5.2.drv-0/compiler-rt-3.5.2.src/lib/asan/asan_linux.cc: In function 'bool __asan::AsanInterceptsSignal(int)':
+  /tmp/guix-build-clang-runtime-3.5.2.drv-0/compiler-rt-3.5.2.src/lib/asan/asan_linux.cc:224:20: error: 'SIGSEGV' was not declared in this scope
+
+diff --git a/libsanitizer/asan/asan_linux.cc b/libsanitizer/asan/asan_linux.cc
+index c504168..59087b9 100644
+--- a/lib/asan/asan_linux.cc
++++ b/lib/asan/asan_linux.cc
+@@ -29,6 +29,7 @@
+ #include <dlfcn.h>
+ #include <fcntl.h>
+ #include <pthread.h>
++#include <signal.h>
+ #include <stdio.h>
+ #include <unistd.h>
+ #include <unwind.h>
+
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+Now, work around this other error:
+
+  /tmp/guix-build-clang-runtime-3.5.2.drv-0/compiler-rt-3.5.2.src/lib/sanitizer_common/sanitizer_stoptheworld_linux_libcdep.cc: In function 'int __sanitizer::TracerThread(void*)':
+  /tmp/guix-build-clang-runtime-3.5.2.drv-0/compiler-rt-3.5.2.src/lib/sanitizer_common/sanitizer_stoptheworld_linux_libcdep.cc:239:22: error: aggregate 'sigaltstack handler_stack' has incomplete type and cannot be defined
+
+
+diff --git a/lib/sanitizer_common/sanitizer_linux.cc b/lib/sanitizer_common/sanitizer_linux.cc
+index 2cefa20..223d9c6 100644
+--- a/lib/sanitizer_common/sanitizer_linux.cc
++++ b/lib/sanitizer_common/sanitizer_linux.cc
+@@ -546,8 +546,7 @@ uptr internal_prctl(int option, uptr arg2, uptr arg3, uptr arg4, uptr arg5) {
+ }
+ #endif
+ 
+-uptr internal_sigaltstack(const struct sigaltstack *ss,
+-                         struct sigaltstack *oss) {
++uptr internal_sigaltstack(const void *ss, void *oss) {
+   return internal_syscall(SYSCALL(sigaltstack), (uptr)ss, (uptr)oss);
+ }
+ 
+diff --git a/lib/sanitizer_common/sanitizer_linux.h b/lib/sanitizer_common/sanitizer_linux.h
+index 4497702..1594058 100644
+--- a/lib/sanitizer_common/sanitizer_linux.h
++++ b/lib/sanitizer_common/sanitizer_linux.h
+@@ -19,7 +19,6 @@
+ #include "sanitizer_platform_limits_posix.h"
+ 
+ struct link_map;  // Opaque type returned by dlopen().
+-struct sigaltstack;
+ 
+ namespace __sanitizer {
+ // Dirent structure for getdents(). Note that this structure is different from
+@@ -28,8 +27,7 @@ struct linux_dirent;
+ 
+ // Syscall wrappers.
+ uptr internal_getdents(fd_t fd, struct linux_dirent *dirp, unsigned int count);
+-uptr internal_sigaltstack(const struct sigaltstack* ss,
+-                          struct sigaltstack* oss);
++uptr internal_sigaltstack(const void* ss, void* oss);
+ uptr internal_sigprocmask(int how, __sanitizer_sigset_t *set,
+     __sanitizer_sigset_t *oldset);
+ void internal_sigfillset(__sanitizer_sigset_t *set);
+diff --git a/lib/sanitizer_common/sanitizer_stoptheworld_linux_libcdep.cc b/lib/sanitizer_common/sanitizer_stoptheworld_linux_libcdep.cc
+index c919e4f..014162af 100644
+--- a/lib/sanitizer_common/sanitizer_stoptheworld_linux_libcdep.cc
++++ b/lib/sanitizer_common/sanitizer_stoptheworld_linux_libcdep.cc
+@@ -267,7 +267,7 @@ static int TracerThread(void* argument) {
+ 
+   // Alternate stack for signal handling.
+   InternalScopedBuffer<char> handler_stack_memory(kHandlerStackSize);
+-  struct sigaltstack handler_stack;
++  stack_t handler_stack;
+   internal_memset(&handler_stack, 0, sizeof(handler_stack));
+   handler_stack.ss_sp = handler_stack_memory.data();
+   handler_stack.ss_size = kHandlerStackSize;
+diff --git a/lib/tsan/tsan_platform_linux.cc b/lib/tsan/tsan_platform_linux.cc
+index 09cec5f..908f4fe 100644
+--- a/lib/tsan/rtl/tsan_platform_linux.cc
++++ b/lib/tsan/rtl/tsan_platform_linux.cc
+@@ -291,7 +291,7 @@ bool IsGlobalVar(uptr addr) {
+ int ExtractResolvFDs(void *state, int *fds, int nfd) {
+ #if SANITIZER_LINUX
+   int cnt = 0;
+-  __res_state *statp = (__res_state*)state;
++  struct __res_state *statp = (struct __res_state*)state;
+   for (int i = 0; i < MAXNS && cnt < nfd; i++) {
+     if (statp->_u._ext.nsaddrs[i] && statp->_u._ext.nssocks[i] != -1)
+       fds[cnt++] = statp->_u._ext.nssocks[i];
+-- 
+2.9.3

gnu/packages/patches/clang-runtime-esan-build-fixes.patch

@@ -0,0 +1,19 @@
+Fix esan compilation against glibc 2.26:
+
+  /tmp/guix-build-clang-runtime-3.9.1.drv-0/compiler-rt-3.9.1.src/lib/esan/esan_sideline_linux.cpp: In static member function ‘static int __esan::SidelineThread::runSideline(void*)’:
+  /tmp/guix-build-clang-runtime-3.9.1.drv-0/compiler-rt-3.9.1.src/lib/esan/esan_sideline_linux.cpp:73:22: error: aggregate ‘__esan::SidelineThread::runSideline(void*)::sigaltstack SigAltStack’ has incomplete type and cannot be defined
+
+Patch from <https://github.com/google/sanitizers/issues/822>.
+
+index d04f5909d..bc272dfe4 100644
+--- a/lib/esan/esan_sideline_linux.cpp
++++ b/lib/esan/esan_sideline_linux.cpp
+@@ -70,7 +70,7 @@ int SidelineThread::runSideline(void *Arg) {
+ 
+   // Set up a signal handler on an alternate stack for safety.
+   InternalScopedBuffer<char> StackMap(SigAltStackSize);
+-  struct sigaltstack SigAltStack;
++  stack_t SigAltStack;
+   SigAltStack.ss_sp = StackMap.data();
+   SigAltStack.ss_size = SigAltStackSize;
+   SigAltStack.ss_flags = 0;