Merge pull request #2032 from Flamefire/clean_build_dir

let CMakeMake remove 'easybuild_obj' build directory if it already exists

easybuild/easyblocks/generic/cmakemake.py

@@ -39,7 +39,7 @@
 from easybuild.framework.easyconfig import CUSTOM
 from easybuild.tools.build_log import print_warning
 from easybuild.tools.config import build_option
-from easybuild.tools.filetools import change_dir, mkdir, which
+from easybuild.tools.filetools import change_dir, mkdir, which, remove_dir
 from easybuild.tools.environment import setvar
 from easybuild.tools.modules import get_software_root
 from easybuild.tools.run import run_cmd
@@ -120,6 +120,12 @@ def configure_step(self, srcdir=None, builddir=None):
 
         if builddir is None and self.cfg.get('separate_build_dir', True):
             builddir = os.path.join(self.builddir, 'easybuild_obj')
+            # For separate_build_dir we want a clean folder. So remove if it exists
+            # This can happen when multiple iterations are done (e.g. shared, static, ...)
+            if os.path.exists(builddir):
+                self.log.warning('Build directory %s already exists (from previous iterations?). Removing...',
+                                 builddir)
+                remove_dir(builddir)
 
         if builddir:
             mkdir(builddir, parents=True)