opium : convert to be an autotools package (#18708)

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

@@ -6,7 +6,7 @@
 from spack import *
 
 
-class Opium(Package):
+class Opium(AutotoolsPackage):
     """DFT pseudopotential generation project"""
 
     homepage = "https://opium.sourceforge.net/index.html"
@@ -17,15 +17,19 @@ class Opium(Package):
     depends_on('blas')
     depends_on('lapack')
 
-    def install(self, spec, prefix):
+    def configure_args(self):
+        spec = self.spec
+        options = []
         libs = spec['lapack'].libs + spec['blas'].libs
-        options = ['LDFLAGS=%s' % libs.ld_flags]
+        options.append('LDFLAGS=%s' % libs.ld_flags)
+        return options
 
-        configure(*options)
+    def build(self, spec, prefix):
         with working_dir("src", create=False):
             make("all-subdirs")
             make("opium")
 
+    def install(self, spec, prefix):
         # opium not have a make install :-((
         mkdirp(self.prefix.bin)
         install(join_path(self.stage.source_path, 'opium'),