gnu: llvm-3.7, llvm-3.8: Fix build with gcc.

* gnu/packages/patches/clang-runtime-3.7-fix-build-with-python3.patch,
gnu/packages/patches/llvm-3.x.1-fix-build-with-gcc.patch: New files.
* gnu/packages/llvm.scm (clang-runtime-3.7, llvm-3.7, llvm-3.8): Use patches.
* gnu/local.mk: Register patches.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

gnu/local.mk

@@ -955,6 +955,7 @@ dist_patch_DATA =						\
   %D%/packages/patches/clang-runtime-esan-build-fixes.patch	\
   %D%/packages/patches/clang-runtime-9-libsanitizer-mode-field.patch	\
   %D%/packages/patches/clang-runtime-3.5-libsanitizer-mode-field.patch	\
+  %D%/packages/patches/clang-runtime-3.7-fix-build-with-python3.patch	\
   %D%/packages/patches/clang-runtime-3.9-libsanitizer-mode-field.patch	\
   %D%/packages/patches/clang-runtime-3.8-libsanitizer-mode-field.patch	\
   %D%/packages/patches/classpath-aarch64-support.patch		\
@@ -1452,6 +1453,7 @@ dist_patch_DATA =						\
   %D%/packages/patches/llhttp-bootstrap-CVE-2020-8287.patch	\
   %D%/packages/patches/llvm-3.5-fix-clang-build-with-gcc5.patch	\
   %D%/packages/patches/llvm-3.6-fix-build-with-gcc-10.patch	\
+  %D%/packages/patches/llvm-3.x.1-fix-build-with-gcc.patch	\
   %D%/packages/patches/llvm-8-fix-build-with-gcc-10.patch	\
   %D%/packages/patches/llvm-9-fix-bitcast-miscompilation.patch	\
   %D%/packages/patches/llvm-9-fix-lpad-miscompilation.patch	\

gnu/packages/llvm.scm

@@ -1036,7 +1036,8 @@ of programming tools as well as libraries with equivalent functionality.")
       (uri (llvm-uri "llvm" version))
       (sha256
        (base32
-        "1ybmnid4pw2hxn12ax5qa5kl1ldfns0njg8533y3mzslvd5cx0kf"))))))
+        "1ybmnid4pw2hxn12ax5qa5kl1ldfns0njg8533y3mzslvd5cx0kf"))
+      (patches (search-patches "llvm-3.x.1-fix-build-with-gcc.patch"))))))
 
 (define-public clang-runtime-3.8
   (clang-runtime-from-llvm
@@ -1060,7 +1061,8 @@ of programming tools as well as libraries with equivalent functionality.")
        (uri (llvm-uri "llvm" version))
        (sha256
         (base32
-         "1masakdp9g2dan1yrazg7md5am2vacbkb3nahb3dchpc1knr8xxy"))))))
+         "1masakdp9g2dan1yrazg7md5am2vacbkb3nahb3dchpc1knr8xxy"))
+      (patches (search-patches "llvm-3.x.1-fix-build-with-gcc.patch"))))))
 
 (define-public clang-runtime-3.7
   (clang-runtime-from-llvm
@@ -1068,7 +1070,8 @@ of programming tools as well as libraries with equivalent functionality.")
    "10c1mz2q4bdq9bqfgr3dirc6hz1h3sq8573srd5q5lr7m7j6jiwx"
    '("clang-runtime-asan-build-fixes.patch"
      "clang-runtime-3.8-libsanitizer-mode-field.patch"
-     "clang-3.5-libsanitizer-ustat-fix.patch")))
+     "clang-3.5-libsanitizer-ustat-fix.patch"
+     "clang-runtime-3.7-fix-build-with-python3.patch")))
 
 (define-public clang-3.7
   (clang-from-llvm llvm-3.7 clang-runtime-3.7

gnu/packages/patches/clang-runtime-3.7-fix-build-with-python3.patch

@@ -0,0 +1,16 @@
+Patch based on changes from
+https://github.com/llvm/llvm-project/commit/c1fde4fa943fd03a3d40bc5d32b9e0045fd29208
+
+diff --git a/lib/sanitizer_common/scripts/gen_dynamic_list.py b/lib/sanitizer_common/scripts/gen_dynamic_list.py
+index 5ea2ca1..d7bc287 100755
+--- a/lib/sanitizer_common/scripts/gen_dynamic_list.py
++++ b/lib/sanitizer_common/scripts/gen_dynamic_list.py
+@@ -100,7 +100,7 @@ def main(argv):
+     print('global:')
+   result.sort()
+   for f in result:
+-    print('  ' + f.encode('utf-8') + ';')
++    print(u'  %s;' % f)
+   if args.version_list:
+     print('local:')
+     print('  *;')

gnu/packages/patches/llvm-3.x.1-fix-build-with-gcc.patch

@@ -0,0 +1,15 @@
+Patch from https://github.com/digego/extempore/issues/318
+
+diff --git a/include/llvm/IR/ValueMap.h.orig b/include/llvm/IR/ValueMap.h
+index ad518ac..d928f6a 100644
+--- a/include/llvm/IR/ValueMap.h
++++ b/include/llvm/IR/ValueMap.h
+@@ -99,7 +99,7 @@
+   explicit ValueMap(const ExtraData &Data, unsigned NumInitBuckets = 64)
+       : Map(NumInitBuckets), Data(Data) {}
+ 
+-  bool hasMD() const { return MDMap; }
++  bool hasMD() const { return static_cast<bool>(MDMap); }
+   MDMapT &MD() {
+     if (!MDMap)
+       MDMap.reset(new MDMapT);