build: Include ida.h from the locations at which it is looked for.

* m4/acinclude.m4 (OCTAVE_CHECK_SUNDIALS_SUNREALTYPE,
OCTAVE_CHECK_SUNDIALS_SIZEOF_REALTYPE, OCTAVE_CHECK_SUNDIALS_SUNLINSOL_KLU):
The configure script checks for the SUNDIALS IDA header at "ida.h" and
"ida/ida.h". Include that header at the found location in other configure tests.
* etc/NEWS.10.md: Add note about change.

See also: https://octave.discourse.group/t/6971

Author: mmuetzel

etc/NEWS.10.md

@@ -41,6 +41,8 @@ Summary of bugs fixed for version 10.3.0 (tbd):
 
 - Add tests for shadowed functions in core Octave (bug #46849).
 - Fix building Java on solaris2 platforms (bug #67442).
+- Include `ida.h` in configure tests from the locations at which it is looked
+  for.
 
 ### Documentation
 

m4/acinclude.m4

@@ -2496,6 +2496,8 @@ AC_DEFUN([OCTAVE_CHECK_SUNDIALS_SUNREALTYPE], [
     [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
         #if defined (HAVE_IDA_IDA_H)
         #  include <ida/ida.h>
+        #elif defined (HAVE_IDA_H)
+        #  include <ida.h>
         #endif
         ]], [[
         sunrealtype test;
@@ -2522,6 +2524,8 @@ AC_DEFUN([OCTAVE_CHECK_SUNDIALS_SIZEOF_REALTYPE], [
     [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
         #if defined (HAVE_IDA_IDA_H)
         #  include <ida/ida.h>
+        #elif defined (HAVE_IDA_H)
+        #  include <ida.h>
         #endif
         #include <assert.h>
         ]], [[
@@ -2590,7 +2594,9 @@ AC_DEFUN([OCTAVE_CHECK_SUNDIALS_SUNLINSOL_KLU], [
       [octave_cv_sundials_sunlinsol_klu],
       [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
          #if defined (HAVE_IDA_IDA_H)
-         #include <ida/ida.h>
+         #  include <ida/ida.h>
+         #elif defined (HAVE_IDA_H)
+         #  include <ida.h>
          #endif
          #if defined (HAVE_KLU_H)
          #include <klu.h>
@@ -2634,7 +2640,9 @@ AC_DEFUN([OCTAVE_CHECK_SUNDIALS_SUNLINSOL_KLU], [
         [octave_cv_sundials_sunlinsol_klu],
         [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
            #if defined (HAVE_IDA_IDA_H)
-           #include <ida/ida.h>
+           #  include <ida/ida.h>
+           #elif defined (HAVE_IDA_H)
+           #  include <ida.h>
            #endif
            #if defined (HAVE_KLU_H)
            #include <klu.h>