(conan-io#3959) Boost/1.72.0/mpi

* Enables Boost MPI when requested (boost:without_mpi=False)

The boost:without_mpi default value is switched to True (disabling Boost MPI support)

* Adds Boost:MPI configuration check when enabled

The mpi.jam file is patched to enable the error

* Applies patch to all version

recipes/boost/all/conandata.yml

@@ -58,6 +58,8 @@ patches:
       base_path: "source_subfolder"
     - patch_file: "patches/boost_locale_fail_on_missing_backend.patch"
       base_path: "source_subfolder"
+    - patch_file: "patches/boost_mpi_check.patch"
+      base_path: "source_subfolder"
   1.70.0:
     - patch_file: "patches/0001-beast-fix-moved-from-executor.patch"
       base_path: "source_subfolder"
@@ -73,6 +75,8 @@ patches:
       base_path: "source_subfolder"
     - patch_file: "patches/boost_locale_fail_on_missing_backend.patch"
       base_path: "source_subfolder"
+    - patch_file: "patches/boost_mpi_check.patch"
+      base_path: "source_subfolder"
   1.71.0:
     - patch_file: "patches/bcp_namespace_issues_1_71.patch"
       base_path: "source_subfolder"
@@ -86,6 +90,8 @@ patches:
       base_path: "source_subfolder"
     - patch_file: "patches/boost_locale_fail_on_missing_backend.patch"
       base_path: "source_subfolder"
+    - patch_file: "patches/boost_mpi_check.patch"
+      base_path: "source_subfolder"
   1.72.0:
     - patch_file: "patches/bcp_namespace_issues_1_72.patch"
       base_path: "source_subfolder"
@@ -103,27 +109,37 @@ patches:
       base_path: "source_subfolder"
     - patch_file: "patches/boost_locale_fail_on_missing_backend.patch"
       base_path: "source_subfolder"
+    - patch_file: "patches/boost_mpi_check.patch"
+      base_path: "source_subfolder"
   1.73.0:
     - patch_file: "patches/boost_build_qcc_fix_debug_build_parameter.patch"
       base_path: "source_subfolder"
     - patch_file: "patches/python_base_prefix.patch"
       base_path: "source_subfolder"
     - patch_file: "patches/boost_locale_fail_on_missing_backend.patch"
       base_path: "source_subfolder"
+    - patch_file: "patches/boost_mpi_check.patch"
+      base_path: "source_subfolder"
   1.74.0:
     - patch_file: "patches/boost_build_qcc_fix_debug_build_parameter_since_1_74.patch"
       base_path: "source_subfolder"
     - patch_file: "patches/python_base_prefix_since_1_74.patch"
       base_path: "source_subfolder"
     - patch_file: "patches/boost_locale_fail_on_missing_backend.patch"
       base_path: "source_subfolder"
+    - patch_file: "patches/boost_mpi_check.patch"
+      base_path: "source_subfolder"
   1.75.0:
     - patch_file: "patches/boost_build_qcc_fix_debug_build_parameter_since_1_74.patch"
       base_path: "source_subfolder"
     - patch_file: "patches/python_base_prefix_since_1_74.patch"
       base_path: "source_subfolder"
     - patch_file: "patches/boost_locale_fail_on_missing_backend.patch"
       base_path: "source_subfolder"
+    - patch_file: "patches/boost_mpi_check.patch"
+      base_path: "source_subfolder"
   1.76.0:
     - patch_file: "patches/boost_locale_fail_on_missing_backend.patch"
       base_path: "source_subfolder"
+    - patch_file: "patches/boost_mpi_check.patch"
+      base_path: "source_subfolder"

recipes/boost/all/conanfile.py

@@ -1143,6 +1143,10 @@ def create_library_config(deps_name, name):
                         includes=self._python_includes,
                         libraries=self._python_libraries)
 
+        if not self.options.without_mpi:
+            # https://www.boost.org/doc/libs/1_72_0/doc/html/mpi/getting_started.html
+            contents += '\nusing mpi ;'
+
         # Specify here the toolset with the binary if present if don't empty parameter :
         contents += '\nusing "%s" : %s : ' % (self._toolset, self._toolset_version)
 

recipes/boost/all/patches/boost_mpi_check.patch

@@ -0,0 +1,24 @@
+diff -ru a/tools/build/src/tools/mpi.jam b/tools/build/src/tools/mpi.jam
+--- a/tools/build/src/tools/mpi.jam	2019-12-10 01:20:16.000000000 +0100
++++ b/tools/build/src/tools/mpi.jam	2020-09-02 13:17:22.942349254 +0200
+@@ -66,6 +66,8 @@
+ import type ;
+ import path ;
+
++import errors ;
++
+ # Make this module a project
+ project.initialize $(__name__) ;
+ project mpi ;
+@@ -539,6 +541,11 @@
+     # Set up the "mpi" alias
+     alias mpi : : : : $(options) ;
+   }
++
++  if ! $(.configured)
++  {
++	 errors.user-error "MPI not configured" ;
++  }     
+ }
+
+ # States whether MPI has bee configured