mpiserial: rework installation (#40762)

var/spack/repos/builtin/packages/mpi-serial/install.patch

@@ -1,34 +0,0 @@
---- old/Makefile
-+++ new/Makefile
-@@ -76,6 +76,9 @@
-
- .PHONY: clean tests install
-
-+includedir = $(PREFIX)/include
-+libdir = $(PREFIX)/lib
-+
- clean:
- 	/bin/rm -f *.o ctest ftest $(LIB) mpi.mod config.log config.status
- 	cd tests ; $(MAKE) clean
-@@ -83,7 +86,7 @@
- tests:
- 	cd tests; make
-
--install: lib
-+install: $(LIB)
- 	$(MKINSTALLDIRS) $(libdir) $(includedir)
- 	$(INSTALL) lib$(MODULE).a -m 644 $(libdir)
- 	$(INSTALL) mpi.h -m 644 $(includedir)
---- old/Makefile.conf.in
-+++ new/Makefile.conf.in
-@@ -10,7 +10,8 @@
- LIBS            = @LIBS@
- CRULE           = .c.o
- F90RULE         = .F90.o
--
-+MKINSTALLDIRS   = mkdir
- SHELL		= /bin/sh
--
-+INSTALL         = install
- MODULE		= mpi-serial
-+PREFIX          = @prefix@

var/spack/repos/builtin/packages/mpi-serial/package.py

@@ -3,6 +3,8 @@
 #
 # SPDX-License-Identifier: (Apache-2.0 OR MIT)
 
+import os
+
 from spack.package import *
 
 
@@ -31,8 +33,6 @@ class MpiSerial(AutotoolsPackage):
         description="Specify the size of Fortran double precision variables",
     )
 
-    patch("install.patch")
-
     provides("mpi")
 
     def flag_handler(self, name, flags):
@@ -41,8 +41,7 @@ def flag_handler(self, name, flags):
 
         if name == "cflags":
             config_flags.append(self.compiler.cc_pic_flag)
-
+            if spec.satisfies("%oneapi"):
-            if spec.compiler.name in ["oneapi"]:
                 # OneAPI fails due to these standards checks
                 config_flags.append("-Wno-error=implicit-int")
                 config_flags.append("-Wno-error=implicit-function-declaration")
@@ -62,3 +61,14 @@ def configure_args(self):
             args.extend(["--enable-fort-double={0}".format(doublesize)])
 
         return args
+
+    def install(self, spec, prefix):
+        mkdir(prefix.lib)
+        mkdir(prefix.include)
+        install("libmpi-serial.a", prefix.lib)
+        install("mpi.h", prefix.include)
+        install("mpif.h", prefix.include)
+        if os.path.isfile("mpi.mod"):
+            install("mpi.mod", prefix.include)
+        if os.path.isfile("MPI.mod"):
+            install("MPI.mod", prefix.include)