unifyfs %oneapi: add CFLAGS=-Wno-unused-function to build environment (#32107)

share/spack/gitlab/cloud_pipelines/stacks/e4s-oneapi/spack.yaml

@@ -177,6 +177,7 @@ spack:
   - turbine
   - umap
   - umpire
+  - unifyfs
   - upcxx
   - veloc
   - vtk-m ~openmp # can't build +openmp w/ %oneapi: https://github.com/spack/spack/issues/31830
@@ -210,7 +211,6 @@ spack:
   #- py-warpx@22.05 ^warpx dims=2                     # adios2
   #- py-warpx@22.05 ^warpx dims=3                     # adios2
   #- py-warpx@22.05 ^warpx dims=rz                    # adios2
-  #- unifyfs@0.9.2                                    # unifyfs
   #- variorum@0.4.1                                   # variorum
 
   # CPU BUILD FAILURES - NOTES
@@ -229,7 +229,6 @@ spack:
   # ruby: limits.c:415:34: error: invalid suffix 'D' on floating constant
   # rust: /usr/bin/ld: /opt/intel/oneapi/compiler/2022.1.0/linux/bin-llvm/../compiler/lib/intel64_lin/libimf.a(libm_feature_flag.o): in function `__libm_feature_flag_init': libm_feature_flag.c:(.text+0x25): undefined reference to `__intel_cpu_feature_indicator_x'
   # scr: scr_globals.h:81:10: fatal error: 'spath_mpi.h' file not found: #include "spath_mpi.h"
-  # unifyfs: client/src/unifyfs.c:1502:7: error: unused function 'next_page_align' [-Werror,-Wunused-function]
   # variorum: ld: Intel/CMakeFiles/variorum_intel.dir/msr_core.c.o:(.bss+0x0): multiple definition of `g_platform'; CMakeFiles/variorum.dir/config_architecture.c.o:(.bss+0x0): first defined here
   # vtk-m: clang++: error: clang frontend command failed with exit code 139 (use -v to see invocation)
 

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

@@ -84,6 +84,8 @@ def setup_build_environment(self, env):
         # See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98266
         if "%gcc@11" in self.spec:
             env.append_flags("CFLAGS", "-Wno-array-bounds")
+        if self.spec.satisfies("%oneapi"):
+            env.append_flags("CFLAGS", "-Wno-unused-function")
 
     def configure_args(self):
         spec = self.spec