Merge branch 'cosmetics' into 'master'

Print information about the libraries used in the greeting message

I had nothing better to do whilst sitting at the back of the room during the DEX workshop...

See merge request !72

configure.ac

@@ -60,6 +60,7 @@ AC_ARG_ENABLE([mpi],
 good_mpi="yes"
 if test "$enable_mpi" = "yes"; then
     AX_MPI([CC="$MPICC" AC_DEFINE(HAVE_MPI, 1, [Define if you have the MPI library.]) ])
+    MPI_LIBRARY="Unknown MPI"
 
     # Various MPI implementations require additional libraries when also using
     # threads. Use mpirun (on PATH) as that seems to be only command with
@@ -83,14 +84,17 @@ if test "$enable_mpi" = "yes"; then
        case "$version" in
          *Intel*MPI*)
             MPI_THREAD_LIBS="-mt_mpi"
+            MPI_LIBRARY="Intel MPI"
             AC_MSG_RESULT([Intel MPI])
          ;;
          *Platform*)
             MPI_THREAD_LIBS="-lmtmpi"
+            MPI_LIBRARY="PLATFORM MPI"
             AC_MSG_RESULT([PLATFORM MPI])
          ;;
          *"Open MPI"*)
             MPI_THREAD_LIBS=""
+            MPI_LIBRARY="Open MPI"
             AC_MSG_RESULT([Open MPI])
             #  OpenMPI should be 1.8.6 or later, if not complain.
             #  Version is last word on first line of -version output.
@@ -109,6 +113,7 @@ if test "$enable_mpi" = "yes"; then
        esac
        AC_SUBST([MPI_THREAD_LIBS])
     fi
+    AC_DEFINE_UNQUOTED([SWIFT_MPI_LIBRARY], ["$MPI_LIBRARY"], [The MPI library name, if known.])
 fi
 AM_CONDITIONAL([HAVEMPI],[test $enable_mpi = "yes"])
 

src/version.c

@@ -18,6 +18,21 @@
  *
  ******************************************************************************/
 
+/* Config parameters. */
+#include "../config.h"
+
+/* MPI headers. */
+#ifdef WITH_MPI
+#include <mpi.h>
+#ifdef HAVE_METIS
+#include <metis.h>
+#endif
+#endif
+
+#ifdef HAVE_HDF5
+#include <hdf5.h>
+#endif
+
 /* Some standard headers. */
 #include <stdio.h>
 #include <string.h>
@@ -28,8 +43,10 @@
 /**
  * @brief Return the source code git revision
  *
- * @details The SHA of the code checked out when the library was last built.
+ * The SHA of the code checked out when the library was last built.
  * Will include -dirty if they are local modifications.
+ *
+ * @result the git version.
  */
 const char *git_revision(void) {
   static char buf[256];
@@ -48,7 +65,9 @@ const char *git_revision(void) {
 /**
  * @brief Return the source code git branch
  *
- * @details The name of the current branch when the code was last built.
+ * The name of the current branch when the code was last built.
+ *
+ * @result git branch
  */
 const char *git_branch(void) {
   static char buf[256];
@@ -66,6 +85,8 @@ const char *git_branch(void) {
 
 /**
  * @brief The version of SWIFT
+ *
+ * @result the package version
  */
 const char *package_version(void) {
   static const char *version = PACKAGE_VERSION;
@@ -74,6 +95,8 @@ const char *package_version(void) {
 
 /**
  * @brief A description of the package version and code status.
+ *
+ * @result description of the package version
  */
 const char *package_description(void) {
   static char buf[256];
@@ -86,6 +109,11 @@ const char *package_description(void) {
   return buf;
 }
 
+/**
+ * @brief return the name of the compiler used to build SWIFT.
+ *
+ * @result description of the compiler.
+ */
 const char *compiler_name(void) {
   static char compiler[256] = {0};
 #if defined(__INTEL_COMPILER)
@@ -101,6 +129,11 @@ const char *compiler_name(void) {
   return compiler;
 }
 
+/**
+ * @brief return compiler version used to build SWIFT.
+ *
+ * @result description of the compiler.
+ */
 const char *compiler_version(void) {
   static char version[256] = {0};
 #if defined(__INTEL_COMPILER)
@@ -122,6 +155,87 @@ const char *compiler_version(void) {
   return version;
 }
 
+
+/**
+ * @brief return the MPI version, runtime if possible otherwise that used when
+ *        built.
+ *
+ * @result description of the MPI version.
+ */
+const char *mpi_version(void) {
+  static char version[80] = {0};
+
+#ifdef WITH_MPI
+  int std_version, std_subversion;
+
+  /* Check that the library implements the version string routine */
+#ifdef MPI_MAX_LIBRARY_VERSION_STRING
+  static char lib_version[MPI_MAX_LIBRARY_VERSION_STRING] = {0};
+  int len;
+  MPI_Get_library_version(lib_version, &len);
+
+  /* Find first \n and truncate string to this length, can get many lines from
+   * some MPIs (MPICH). */
+  char *ptr = strchr(lib_version, '\n');
+  if (ptr != NULL) *ptr = '\0';
+
+  /* Also arbitrarily truncate to keep down to one line, Open MPI,
+   * check for last comma and keep to ~60 chars max. */
+  strcpy(lib_version+60, "...");
+  ptr = strrchr(lib_version, ',');
+  if (ptr != NULL) *ptr = '\0';
+
+#else
+  /* Use autoconf guessed value. */
+  static char lib_version[60] = {0};
+  snprintf(lib_version, 60, "%s", SWIFT_MPI_LIBRARY);
+#endif
+
+  /* Numeric version. */
+  MPI_Get_version(&std_version, &std_subversion);
+  snprintf(version, 80, "%s (MPI std v%i.%i)", lib_version,
+           std_version, std_subversion);
+#else
+  sprintf(version, "Code was not compiled with MPI support");
+#endif
+  return version;
+}
+
+/**
+ * @brief return the HDF5 version in use at runtime.
+ *
+ * @result description of the current HDF5 version.
+ */
+const char *hdf5_version(void) {
+
+  static char version[256] = {0};
+#ifdef HAVE_HDF5
+  unsigned int majnum, minnum, relnum;
+  H5get_libversion(&majnum, &minnum, &relnum);
+  sprintf(version, "%i.%i.%i", majnum, minnum, relnum);
+#else
+  sprintf(version, "Unknown version");
+#endif
+  return version;
+}
+
+/**
+ * @brief return the METIS version used when SWIFT was built.
+ *
+ * @result description of the METIS version.
+ */
+const char *metis_version(void) {
+
+  static char version[256] = {0};
+#if defined(WITH_MPI) && defined(HAVE_METIS)
+  sprintf(version, "%i.%i.%i", METIS_VER_MAJOR, METIS_VER_MINOR,
+          METIS_VER_SUBMINOR);
+#else
+  sprintf(version, "Unknown version");
+#endif
+  return version;
+}
+
 /**
  * @brief Prints a greeting message to the standard output containing code
  * version and revision number
@@ -138,6 +252,16 @@ void greetings(void) {
 
   printf(" Version : %s\n", package_version());
   printf(" Revision: %s, Branch: %s\n", git_revision(), git_branch());
-  printf(" Webpage : www.swiftsim.com\n");
-  printf(" Compiler: %s, Version: %s\n\n", compiler_name(), compiler_version());
+  printf(" Webpage : www.swiftsim.com\n\n");
+  printf(" Compiler: %s, Version: %s\n", compiler_name(), compiler_version());
+#ifdef HAVE_HDF5
+  printf(" HDF5 library version: %s\n", hdf5_version());
+#endif
+#ifdef WITH_MPI
+  printf(" MPI library: %s\n", mpi_version());
+#ifdef HAVE_METIS
+  printf(" METIS library version: %s\n", metis_version());
+#endif
+#endif
+  printf("\n");
 }

src/version.h.in

@@ -35,6 +35,9 @@ const char* git_revision(void);
 const char* git_branch(void);
 const char* compiler_name(void);
 const char* compiler_version(void);
+const char* mpi_version(void);
+const char *hdf5_version(void);
+const char *metis_version(void);
 void greetings(void);
 
 #endif /* SWIFT_VERSION_H */