gosamcontrib: add libs variants (#26030)

var/spack/repos/builtin/packages/gosam-contrib/package.py

@@ -17,6 +17,26 @@ class GosamContrib(AutotoolsPackage):
     version('2.0', sha256='c05beceea74324eb51c1049773095e2cb0c09c8c909093ee913d8b0da659048d')
     version('1.0', sha256='a29d4232d9190710246abc2ed97fdcd8790ce83580f56a360f3456b0377c40ec')
 
+    variant('libs', default='shared,static', values=('shared', 'static'),
+            multi=True, description='Build shared libs, static libs or both')
+    variant('pic', default=False, description='Build position-independent code')
+
+    def flag_handler(self, name, flags):
+        if name in ['cflags', 'cxxflags', 'cppflags']:
+            if '+pic' in self.spec:
+                flags.append(self.compiler.cc_pic_flag)
+
+        if name == 'fflags':
+            if 'gfortran' in self.compiler.fc:
+                flags.append('-std=legacy')
+
+            if '+pic' in self.spec:
+                flags.append(self.compiler.fc_pic_flag)
+
+        return (None, flags, None)
+
     def configure_args(self):
-        args = ["FFLAGS=-std=legacy"]
+        args = []
+        args += self.enable_or_disable('libs')
+
         return args