Also distribute necessary C header files

Pavel noted that some header files were missing from the distribution.
Also, I moved the private generated header files to src/ in order to
more clearly separate them.

Makefile.am

@@ -358,7 +358,9 @@ nobase_elpa_include_HEADERS = \
   elpa/elpa_legacy.h
 
 nobase_nodist_elpa_include_HEADERS = \
-  elpa/elpa_constants.h
+  elpa/elpa_constants.h \
+  elpa/elpa_generated.h \
+  elpa/elpa_generated_legacy.h
 
 dist_man_MANS = \
   man/elpa2_print_kernels.1 \

generated_headers.am

@@ -35,14 +35,14 @@ test/shared/generated.h: $(wildcard $(top_srcdir)/test/shared/*.*90) | test/shar
 	@rm -f $@
 	$(call extract_interface,!c>)
 
-generated_headers += elpa/elpa_generated_fortran_interfaces.h
-elpa/elpa_generated_fortran_interfaces.h: $(wildcard $(top_srcdir)/src/elpa2/kernels/*.*c $(top_srcdir)/src/elpa2/kernels/*.s $(top_srcdir)/src/*.[ch]) | elpa
+generated_headers += src/elpa_generated_fortran_interfaces.h
+src/elpa_generated_fortran_interfaces.h: $(wildcard $(top_srcdir)/src/elpa2/kernels/*.*c $(top_srcdir)/src/elpa2/kernels/*.s $(top_srcdir)/src/*.[ch]) | src
 	@rm -f $@
 	$(call extract_interface,!f>)
 	$(call extract_interface,#!f>)
 
-generated_headers += elpa/elpa_generated_public_fortran_interfaces.h
-elpa/elpa_generated_public_fortran_interfaces.h: $(wildcard $(top_srcdir)/src/*.[ch]) | elpa
+generated_headers += src/elpa_generated_public_fortran_interfaces.h
+src/elpa_generated_public_fortran_interfaces.h: $(wildcard $(top_srcdir)/src/*.[ch]) | src
 	@rm -f $@
 	$(call extract_interface,!pf>)
 

src/elpa_api.F90

@@ -54,7 +54,7 @@ module elpa_api
   use, intrinsic :: iso_c_binding
   implicit none
 
-#include "elpa/elpa_generated_public_fortran_interfaces.h"
+#include "src/elpa_generated_public_fortran_interfaces.h"
 
   integer, private, parameter :: earliest_api_version = EARLIEST_API_VERSION !< Definition of the earliest API version supported
                                                                              !< with the current release

src/elpa_generated_fortran_interfaces.F90

@@ -52,6 +52,6 @@ module elpa_generated_fortran_interfaces
   use iso_c_binding
   implicit none
 
-#include "elpa/elpa_generated_fortran_interfaces.h"
+#include "src/elpa_generated_fortran_interfaces.h"
 
 end module