libmonitor: update version and add variant to configure (#8834)

* libmonitor: update to version 2018.07.18 and add variant to configure
for hpctoolkit.

* Specify the @2013.02.18 version in cbtf-argonavis and cbtf-krell,
since this is no longer the default version.  These are the only
other packages that use libmonitor.

var/spack/repos/builtin/packages/cbtf-argonavis/package.py

@@ -94,7 +94,7 @@ class CbtfArgonavis(CMakePackage):
     depends_on("cbtf@1.9.1.0:9999+runtime", when='@1.9.1.0:9999+runtime')
 
     # For libmonitor
-    depends_on("libmonitor+krellpatch")
+    depends_on("libmonitor@2013.02.18+krellpatch")
 
     # For PAPI
     depends_on("papi", when='@develop')

var/spack/repos/builtin/packages/cbtf-krell/package.py

@@ -120,7 +120,7 @@ class CbtfKrell(CMakePackage):
     depends_on("cbtf@1.9.1.0:9999+runtime", when='@1.9.1.0:9999+runtime')
 
     # for services and collectors
-    depends_on("libmonitor+krellpatch")
+    depends_on("libmonitor@2013.02.18+krellpatch")
 
     depends_on("libunwind", when='@develop')
     depends_on("libunwind@1.1", when='@1.9.1.0:9999')

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

@@ -26,16 +26,71 @@
 
 
 class Libmonitor(AutotoolsPackage):
-    """Libmonitor is a library for process and thread control."""
+    """Libmonitor is a library providing callback functions for the
+    begin and end of processes and threads.  It provides a layer on
+    which to build process monitoring tools and profilers."""
 
     homepage = "https://github.com/HPCToolkit/libmonitor"
     git      = "https://github.com/HPCToolkit/libmonitor.git"
 
-    version('20130218', commit='4f2311e')
+    version('master', branch='master')
+    version('2018.07.18', commit='d28cc1d3c08c02013a68a022a57a6ac73db88166',
+            preferred=True)
+    version('2013.02.18', commit='4f2311e413fd90583263d6f20453bbe552ccfef3')
 
+    # Configure for Rice HPCToolkit.
+    variant('hpctoolkit', default=False,
+            description='Configure for HPCToolkit')
+
+    variant('bgq', default=False,
+            description='Configure for Blue Gene/Q')
+
+    # Configure for Krell and OpenSpeedshop.
     variant('krellpatch', default=False,
-            description="build with openspeedshop based patch.")
+            description="Build with openspeedshop based patch.")
 
-    patch('libmonitorkrell-0000.patch', when='@20130218+krellpatch')
+    patch('libmonitorkrell-0000.patch', when='@2013.02.18+krellpatch')
-    patch('libmonitorkrell-0001.patch', when='@20130218+krellpatch')
+    patch('libmonitorkrell-0001.patch', when='@2013.02.18+krellpatch')
-    patch('libmonitorkrell-0002.patch', when='@20130218+krellpatch')
+    patch('libmonitorkrell-0002.patch', when='@2013.02.18+krellpatch')
+
+    signals = 'SIGBUS, SIGSEGV, SIGPROF, 36, 37, 38'
+
+    # Set default cflags (-g -O2) and move to the configure line.
+    def flag_handler(self, name, flags):
+        if name != 'cflags':
+            return (flags, None, None)
+
+        if '-g' not in flags:
+            flags.append('-g')
+        for flag in flags:
+            if flag.startswith('-O'):
+                break
+        else:
+            flags.append('-O2')
+
+        return (None, None, flags)
+
+    def configure_args(self):
+        args = []
+
+        if '+hpctoolkit' in self.spec:
+            args.append('--enable-client-signals=%s' % self.signals)
+
+        # TODO: Spack has trouble finding cross-compilers; the +bgq variant
+        # manually specifies the appropriate compiler to build for BGQ (by
+        # setting that here, Spack's choice of CC is overridden).
+        # If the user manually defines an entry in compilers.yaml, the bgq
+        # variant should not be required if the user specifies the bgq
+        # architecture for the libmonitor package. See #8860
+        # TODO: users want to build this for the backend and dependents for the
+        # frontend. Spack ought to make that easy by finding the appropriate
+        # compiler for each if the root and libmonitor are designated to build
+        # on the frontend and backend, respectively. As of now though, there
+        # is an issue with compiler concretization such that spack will attempt
+        # to assign the compiler chosen for libmonitor to the root (unless the
+        # user specifies the compiler for each in addition to the arch).
+        # See #8859
+        if '+bgq' in self.spec:
+            args.append('CC=powerpc64-bgq-linux-gcc')
+
+        return args