Package/flang: Updated to use own version of llvm (#8766)

Flang now uses its own version of llvm and clang (called flang-driver). This is
handled by adding flang-specific versions of the LLVM package and updates flang
to depend on those versions.

var/spack/repos/builtin/packages/flang/package.py

@@ -31,30 +31,21 @@ class Flang(CMakePackage):
     """Flang is a Fortran compiler targeting LLVM."""
 
     homepage = "https://github.com/flang-compiler/flang"
-    url      = "https://github.com/flang-compiler/flang/archive/flang_20180319.tar.gz"
+
+    url      = "https://github.com/flang-compiler/flang/archive/flang_20180612.tar.gz"
     git      = "https://github.com/flang-compiler/flang.git"
 
     version('develop', branch='master')
-    version('20180319', 'e659bad83b791f90af2c5cd672864669')
+    version('20180612', '62284e26214eaaff261a922c67f6878c')
 
-    depends_on(
-            "llvm+clang@4.0.1,5.0.0,6.0.0",
-        patches=[
-            patch('https://github.com/llvm-mirror/clang/pull/33.diff',
-                      sha256='e46d7ab305e5e95c51f4656d9b52058143cd85d859b312b3c80e93a02d54b4a5',
-                      when='@4.0.1', level=1, working_dir='tools/clang'),
-            patch('https://github.com/llvm-mirror/clang/pull/35.diff',
-                      sha256='7f39555783993f78b75c380ca5ef167c1d8b88cc75c6542f6c94e0b6acfb7c5d',
-                      when='@5.0.0', level=1, working_dir='tools/clang'),
-            patch('https://github.com/llvm-mirror/llvm/pull/56.diff',
-                      sha256='2ee155aa1017766cdae3a860050d82ed48961a2f88bcef760d4922ff25ce381e',
-                      when='@6.0.0', level=1),
-            patch('https://github.com/llvm-mirror/clang/pull/40.diff',
-                      sha256='5021f2ea54e957eb1c712f9e9a87b3dc33616ebd2e84735b6735f788fd2c45e9',
-                      when='@6.0.0', level=1, working_dir='tools/clang')
-        ]
-    )
-    depends_on("pgmath@develop", when="@develop")
+    depends_on('llvm@flang-develop', when='@develop')
+    depends_on('llvm@flang-20180612', when='@20180612 target=x86_64')
+
+    # LLVM version specific to OpenPOWER.
+    depends_on('llvm@flang-ppc64le-20180612', when='@20180612 target=ppc64le')
+
+    depends_on('pgmath@develop', when='@develop')
+    depends_on('pgmath@20180612', when='@20180612')
 
     def cmake_args(self):
         options = [
@@ -81,23 +72,14 @@ def post_install(self):
         flang = os.path.join(self.spec.prefix.bin, 'flang')
         with open(flang, 'w') as out:
             out.write('#!/bin/bash\n')
-            if '@develop' in self.spec:
-                out.write(
-                    '{0} -I{1} -L{2} -L{3} {4}{5} {6}{7} -B{8} "$@"\n'.format(
-                        self.spec['llvm'].prefix.bin.flang,
-                        self.prefix.include, self.prefix.lib,
-                        self.spec['pgmath'].prefix.lib,
-                        self.compiler.fc_rpath_arg, self.prefix.lib,
-                        self.compiler.fc_rpath_arg,
-                        self.spec['pgmath'].prefix.lib,
-                        self.spec.prefix.bin))
-            else:
-                out.write(
-                    '{0} -I{1} -L{2} {3}{4} -B{5} "$@"\n'.format(
-                        self.spec['llvm'].prefix.bin.flang,
-                        self.prefix.include, self.prefix.lib,
-                        self.compiler.fc_rpath_arg, self.prefix.lib,
-                        self.spec.prefix.bin))
+            out.write(
+                '{0} -I{1} -L{2} -L{3} {4}{5} {6}{7} -B{8} "$@"\n'.format(
+                    self.spec['llvm'].prefix.bin.flang,
+                    self.prefix.include, self.prefix.lib,
+                    self.spec['pgmath'].prefix.lib,
+                    self.compiler.fc_rpath_arg, self.prefix.lib,
+                    self.compiler.fc_rpath_arg,
+                    self.spec['pgmath'].prefix.lib, self.spec.prefix.bin))
             out.close()
         chmod = which('chmod')
         chmod('+x', flang)

var/spack/repos/builtin/packages/llvm/package.py

@@ -100,6 +100,8 @@ class Llvm(CMakePackage):
 
     base_url = 'http://llvm.org/releases/%%(version)s/%(pkg)s-%%(version)s.src.tar.xz'
     llvm_url = base_url % {'pkg': 'llvm'}
+    # Flang uses its own fork of llvm.
+    flang_llvm_url = 'https://github.com/flang-compiler/llvm.git'
 
     resources = {
         'compiler-rt': {
@@ -402,6 +404,47 @@ class Llvm(CMakePackage):
         },
     ]
 
+    # Flang uses its own fork of clang (renamed flang-driver).
+    flang_resources = {
+        'flang-driver': {
+            'git': 'https://github.com/flang-compiler/flang-driver.git',
+            'destination': 'tools',
+            'placement': 'clang'
+        },
+        'openmp': {
+            'git': 'https://github.com/llvm-mirror/openmp.git',
+            'destination': 'projects',
+            'placement': 'openmp'
+        }
+    }
+
+    flang_releases = [
+        {
+            'version': 'develop',
+            'branch': 'release_60',
+            'resources': {
+                'flang-driver': 'release_60',
+                'openmp': 'release_60',
+            }
+        },
+        {
+            'version': '20180612',
+            'commit': 'f26a3ece4ccd68a52f5aa970ec42837ee0743296',
+            'resources': {
+                'flang-driver': 'e079fa68cb35a53c88c41a1939f90b94d539e984',
+                'openmp': 'd5aa29cb3bcf51289d326b4e565613db8aff65ef'
+            }
+        },
+        {
+            'version': 'ppc64le-20180612',
+            'commit': '4158932a46eb2f06a166f22a4a52ae48c7d2949e',
+            'resources': {
+                'flang-driver': '50c1828a134d5a0f1553b355bf0946db48b0aa6d',
+                'openmp': '29b515e1e6d26b5b0d32d47d28dcdb4b8a11470d'
+            }
+        }
+    ]
+
     for release in releases:
         if release['version'] == 'trunk':
             version(release['version'], svn=release['repo'])
@@ -425,6 +468,31 @@ class Llvm(CMakePackage):
                                          resources[name].get('variant', "")),
                          placement=resources[name].get('placement', None))
 
+    for release in flang_releases:
+        if release['version'] == 'develop':
+            version('flang-' + release['version'], git=flang_llvm_url, branch=release['branch'])
+
+            for name, branch in release['resources'].items():
+                flang_resource = flang_resources[name]
+                resource(name=name,
+                         git=flang_resource['git'],
+                         branch=branch,
+                         destination=flang_resource['destination'],
+                         placement=flang_resource['placement'],
+                         when='@flang-' + release['version'])
+
+        else:
+            version('flang-' + release['version'], git=flang_llvm_url, commit=release['commit'])
+
+            for name, commit in release['resources'].items():
+                flang_resource = flang_resources[name]
+                resource(name=name,
+                         git=flang_resource['git'],
+                         commit=commit,
+                         destination=flang_resource['destination'],
+                         placement=flang_resource['placement'],
+                         when='@flang-' + release['version'])
+
     conflicts('+clang_extra', when='~clang')
     conflicts('+lldb',        when='~clang')
 

var/spack/repos/builtin/packages/pgmath/package.py

@@ -30,9 +30,11 @@ class Pgmath(CMakePackage):
     """Flang's math library"""
 
     homepage = "https://github.com/flang-compiler/flang"
+    url      = "https://github.com/flang-compiler/flang/archive/flang_20180612.tar.gz"
     git      = "https://github.com/flang-compiler/flang.git"
 
     version('develop', branch='master')
+    version('20180612', '62284e26214eaaff261a922c67f6878c')
 
     conflicts("%gcc@:7.1.9999")