Merge pull request #15495 from Micket/20220512165837_new_pr_OpenFOAMv…

…2112

disable use of -ftree-vectorize for OpenFOAM v2112 with foss/2021b

easybuild/easyconfigs/o/OpenFOAM/OpenFOAM-v2112-foss-2021b.eb

@@ -8,7 +8,10 @@ description = """OpenFOAM is a free, open source CFD software package.
  to solid dynamics and electromagnetics."""
 
 toolchain = {'name': 'foss', 'version': '2021b'}
-toolchainopts = {'cstd': 'c++11'}
+# Users have found that vectorizion caused OpenFOAM to produce some very incorrect results.
+# Disabling vectorize was confirmed to fix the the known issues.
+# With no test suite, sticking to known working toolchain options until proven otherwise.
+toolchainopts = {'cstd': 'c++11', 'vectorize': False}
 
 source_urls = ['https://sourceforge.net/projects/openfoam/files/%(version)s/']
 sources = [SOURCE_TGZ]