Don't require C99 in mpi.h

Author: eschnett

CITATION.cff

@@ -5,6 +5,6 @@ authors:
     given-names: Erik
     orcid: 0000-0002-4518-9017
 title: MPItrampoline
-version: v4.1.1
+version: v4.1.2
 doi: 10.5281/zenodo.6174408
 date-released: 2022-07-11

CMakeLists.txt

@@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 3.12...3.20)
 project(
-  MPItrampoline VERSION 4.1.1
+  MPItrampoline VERSION 4.1.2
   DESCRIPTION "MPI trampoline"
   HOMEPAGE_URL "https://github.com/eschnett/MPItrampoline"
   LANGUAGES NONE

include/mpi.h

@@ -116,7 +116,7 @@ extern int MPITRAMPOLINE_CONST mpiabi_loaded_version_patch;
 #include "mpi_decl_constants_c.h"
 #include "mpi_decl_functions_c.h"
 
-inline int PMPI_Pcontrol(int level, ...) { return MPI_SUCCESS; }
+int PMPI_Pcontrol(int level, ...);
 int MPI_Pcontrol(int level, ...);
 
 #ifdef __cplusplus

src/mpi.c

@@ -41,7 +41,7 @@ int mpiabi_loaded_version_patch = -1;
 #include "mpi_defn_constants_c.h"
 #include "mpi_defn_functions_c.h"
 
-extern inline int PMPI_Pcontrol(int level, ...);
+int PMPI_Pcontrol(int level, ...) { return MPI_SUCCESS; }
 int MPI_Pcontrol(int level, ...) { return MPI_SUCCESS; }
 
 #ifdef ENABLE_FORTRAN