compilers: add openmp_flag() method

lib/spack/spack/compilers/clang.py

@@ -47,6 +47,14 @@ class Clang(Compiler):
                    'f77' : 'f77',
                    'fc'  : 'f90' }
 
+    @property
+    def openmp_flag(self):
+        ver = '%s' % self.version
+        if ver.endswith('-apple'):
+            tty.die("Clang from Apple does not support Openmp yet.")
+        else:
+            return "-fopenmp"
+
     @property
     def cxx11_flag(self):
         if ver.endswith('-apple'):

lib/spack/spack/compilers/gcc.py

@@ -49,6 +49,10 @@ class Gcc(Compiler):
                   'f77' : 'gcc/gfortran',
                   'fc'  : 'gcc/gfortran' }
 
+    @property
+    def openmp_flag(self):
+        return "-fopenmp"
+
     @property
     def cxx11_flag(self):
         if self.version < ver('4.3'):

lib/spack/spack/compilers/intel.py

@@ -43,6 +43,10 @@ class Intel(Compiler):
                    'f77' : 'intel/ifort',
                    'fc'  : 'intel/ifort' }
 
+    @property
+    def openmp_flag(self):
+        return "-openmp"
+
     @property
     def cxx11_flag(self):
         if self.version < ver('11.1'):
@@ -68,5 +72,3 @@ def default_version(cls, comp):
         """
         return get_compiler_version(
             comp, '--version', r'\((?:IFORT|ICC)\) ([^ ]+)')
-
-

lib/spack/spack/compilers/nag.py

@@ -20,6 +20,10 @@ class Nag(Compiler):
                    'f77' : 'nag/nagfor',
                    'fc'  : 'nag/nagfor' }
 
+    @property
+    def openmp_flag(self):
+        return "-openmp"
+
     @property
     def cxx11_flag(self):
         tty.die("cxx11_flag() is not implemented for nag. Consider creating a pull-request.")

lib/spack/spack/compilers/pgi.py

@@ -43,6 +43,10 @@ class Pgi(Compiler):
                    'f77' : 'pgi/pgfortran',
                    'fc'  : 'pgi/pgfortran' }
 
+    @property
+    def openmp_flag(self):
+        return "-mp"
+
     @property
     def cxx11_flag(self):
         tty.die("cxx11_flag() is not implemented for pgi. Consider creating a pull-request.")

lib/spack/spack/compilers/xl.py

@@ -44,6 +44,10 @@ class Xl(Compiler):
                    'f77' : 'xl/xlf',
                    'fc'  : 'xl/xlf90' }
 
+    @property
+    def openmp_flag(self):
+        return "-qsmp=omp"
+
     @property
     def cxx11_flag(self):
         if self.version < ver('13.1'):