diff --git a/.gitignore b/.gitignore
index cb8e018ccf1fba81cfa723b918cfe3363480d415..370a5446623f18c408be77d6dadd67909e1cc999 100644
--- a/.gitignore
+++ b/.gitignore
@@ -11,6 +11,8 @@ config.sub
ltmain.sh
libtool
+src/version.h
+swift*.tar.gz
doc/doxyfile.stamp
doc/html/
doc/latex/
diff --git a/configure.ac b/configure.ac
index 3ea6fb7bde8e7ae75af71cd8e4d6864f8492bd20..0745d1f84b18f7a68db26196c0ece32ebbe3538f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -238,6 +238,10 @@ AC_LINK_IFELSE([AC_LANG_PROGRAM(
[AC_DEFINE(HAVE__RTC,1,[Define if you have the UNICOS _rtc() intrinsic.])],[rtc_ok=no])
AC_MSG_RESULT($rtc_ok)
+# Check for git, needed for revision stamps.
+AC_PATH_PROG([GIT_CMD], [git])
+AC_SUBST([GIT_CMD])
+
# Make the documentation.
DX_INIT_DOXYGEN(libswift,doc/Doxyfile,doc/)
@@ -253,6 +257,7 @@ AC_MSG_RESULT([
MPI enabled: $enable_mpi
HDF5 enabled: $with_hdf5
OpenMP enabled: $enable_openmp
+ Metis enabled: $with_metis
])
# Generate output.
diff --git a/examples/cycle.h b/examples/cycle.h
deleted file mode 100644
index e357a017c79a6e9befb73e2b988bd23918b66f37..0000000000000000000000000000000000000000
--- a/examples/cycle.h
+++ /dev/null
@@ -1,528 +0,0 @@
-/*
- * Copyright (c) 2003, 2007-8 Matteo Frigo
- * Copyright (c) 2003, 2007-8 Massachusetts Institute of Technology
- *
- * Permission is hereby granted, free of charge, to any person obtaining
- * a copy of this software and associated documentation files (the
- * "Software"), to deal in the Software without restriction, including
- * without limitation the rights to use, copy, modify, merge, publish,
- * distribute, sublicense, and/or sell copies of the Software, and to
- * permit persons to whom the Software is furnished to do so, subject to
- * the following conditions:
- *
- * The above copyright notice and this permission notice shall be
- * included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
- * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
- * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
- * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- *
- */
-
-
-/* machine-dependent cycle counters code. Needs to be inlined. */
-
-/***************************************************************************/
-/* To use the cycle counters in your code, simply #include "cycle.h" (this
- file), and then use the functions/macros:
-
- ticks getticks(void);
-
- ticks is an opaque typedef defined below, representing the current time.
- You extract the elapsed time between two calls to gettick() via:
-
- double elapsed(ticks t1, ticks t0);
-
- which returns a double-precision variable in arbitrary units. You
- are not expected to convert this into human units like seconds; it
- is intended only for *comparisons* of time intervals.
-
- (In order to use some of the OS-dependent timer routines like
- Solaris' gethrtime, you need to paste the autoconf snippet below
- into your configure.ac file and #include "config.h" before cycle.h,
- or define the relevant macros manually if you are not using autoconf.)
-*/
-
-/***************************************************************************/
-/* This file uses macros like HAVE_GETHRTIME that are assumed to be
- defined according to whether the corresponding function/type/header
- is available on your system. The necessary macros are most
- conveniently defined if you are using GNU autoconf, via the tests:
-
- dnl ---------------------------------------------------------------------
-
- AC_C_INLINE
- AC_HEADER_TIME
- AC_CHECK_HEADERS([sys/time.h c_asm.h intrinsics.h mach/mach_time.h])
-
- AC_CHECK_TYPE([hrtime_t],[AC_DEFINE(HAVE_HRTIME_T, 1, [Define to 1 if hrtime_t is defined in <sys/time.h>])],,[#if HAVE_SYS_TIME_H
-#include <sys/time.h>
-#endif])
-
- AC_CHECK_FUNCS([gethrtime read_real_time time_base_to_time clock_gettime mach_absolute_time])
-
- dnl Cray UNICOS _rtc() (real-time clock) intrinsic
- AC_MSG_CHECKING([for _rtc intrinsic])
- rtc_ok=yes
- AC_TRY_LINK([#ifdef HAVE_INTRINSICS_H
-#include <intrinsics.h>
-#endif], [_rtc()], [AC_DEFINE(HAVE__RTC,1,[Define if you have the UNICOS _rtc() intrinsic.])], [rtc_ok=no])
- AC_MSG_RESULT($rtc_ok)
-
- dnl ---------------------------------------------------------------------
-*/
-
-/***************************************************************************/
-
-#if TIME_WITH_SYS_TIME
-# include <sys/time.h>
-# include <time.h>
-#else
-# if HAVE_SYS_TIME_H
-# include <sys/time.h>
-# else
-# include <time.h>
-# endif
-#endif
-
-#define INLINE_ELAPSED(INL) static INL double elapsed(ticks t1, ticks t0) \
-{ \
- return (double)t1 - (double)t0; \
-}
-
-/*----------------------------------------------------------------*/
-/* Solaris */
-#if defined(HAVE_GETHRTIME) && defined(HAVE_HRTIME_T) && !defined(HAVE_TICK_COUNTER)
-typedef hrtime_t ticks;
-
-#define getticks gethrtime
-
-INLINE_ELAPSED(inline)
-
-#define HAVE_TICK_COUNTER
-#endif
-
-/*----------------------------------------------------------------*/
-/* AIX v. 4+ routines to read the real-time clock or time-base register */
-#if defined(HAVE_READ_REAL_TIME) && defined(HAVE_TIME_BASE_TO_TIME) && !defined(HAVE_TICK_COUNTER)
-typedef timebasestruct_t ticks;
-
-static __inline ticks getticks(void)
-{
- ticks t;
- read_real_time(&t, TIMEBASE_SZ);
- return t;
-}
-
-static __inline double elapsed(ticks t1, ticks t0) /* time in nanoseconds */
-{
- time_base_to_time(&t1, TIMEBASE_SZ);
- time_base_to_time(&t0, TIMEBASE_SZ);
- return (((double)t1.tb_high - (double)t0.tb_high) * 1.0e9 +
- ((double)t1.tb_low - (double)t0.tb_low));
-}
-
-#define HAVE_TICK_COUNTER
-#endif
-
-/*----------------------------------------------------------------*/
-/*
- * PowerPC ``cycle'' counter using the time base register.
- */
-#if ((((defined(__GNUC__) && (defined(__powerpc__) || defined(__ppc__))) || (defined(__MWERKS__) && defined(macintosh)))) || (defined(__IBM_GCC_ASM) && (defined(__powerpc__) || defined(__ppc__)))) && !defined(HAVE_TICK_COUNTER)
-typedef unsigned long long ticks;
-
-static __inline__ ticks getticks(void)
-{
- unsigned int tbl, tbu0, tbu1;
-
- do {
- __asm__ __volatile__ ("mftbu %0" : "=r"(tbu0));
- __asm__ __volatile__ ("mftb %0" : "=r"(tbl));
- __asm__ __volatile__ ("mftbu %0" : "=r"(tbu1));
- } while (tbu0 != tbu1);
-
- return (((unsigned long long)tbu0) << 32) | tbl;
-}
-
-INLINE_ELAPSED(__inline__)
-
-#define HAVE_TICK_COUNTER
-#endif
-
-/* MacOS/Mach (Darwin) time-base register interface (unlike UpTime,
- from Carbon, requires no additional libraries to be linked). */
-#if defined(HAVE_MACH_ABSOLUTE_TIME) && defined(HAVE_MACH_MACH_TIME_H) && !defined(HAVE_TICK_COUNTER)
-#include <mach/mach_time.h>
-typedef uint64_t ticks;
-#define getticks mach_absolute_time
-INLINE_ELAPSED(__inline__)
-#define HAVE_TICK_COUNTER
-#endif
-
-/*----------------------------------------------------------------*/
-/*
- * Pentium cycle counter
- */
-#if (defined(__GNUC__) || defined(__ICC)) && defined(__i386__) && !defined(HAVE_TICK_COUNTER)
-typedef unsigned long long ticks;
-
-#ifndef INLINE
-# if __GNUC__ && !__GNUC_STDC_INLINE__
-# define INLINE extern inline
-# else
-# define INLINE inline
-# endif
-#endif
-INLINE ticks getticks(void)
-{
- ticks ret;
-
- __asm__ __volatile__("rdtsc": "=A" (ret));
- /* no input, nothing else clobbered */
- return ret;
-}
-
-INLINE_ELAPSED(__inline__)
-
-#define HAVE_TICK_COUNTER
-#define TIME_MIN 5000.0 /* unreliable pentium IV cycle counter */
-#endif
-
-/* Visual C++ -- thanks to Morten Nissov for his help with this */
-#if _MSC_VER >= 1200 && _M_IX86 >= 500 && !defined(HAVE_TICK_COUNTER)
-#include <windows.h>
-typedef LARGE_INTEGER ticks;
-#define RDTSC __asm __emit 0fh __asm __emit 031h /* hack for VC++ 5.0 */
-
-static __inline ticks getticks(void)
-{
- ticks retval;
-
- __asm {
- RDTSC
- mov retval.HighPart, edx
- mov retval.LowPart, eax
- }
- return retval;
-}
-
-static __inline double elapsed(ticks t1, ticks t0)
-{
- return (double)t1.QuadPart - (double)t0.QuadPart;
-}
-
-#define HAVE_TICK_COUNTER
-#define TIME_MIN 5000.0 /* unreliable pentium IV cycle counter */
-#endif
-
-/*----------------------------------------------------------------*/
-/*
- * X86-64 cycle counter
- */
-#if (defined(__GNUC__) || defined(__ICC) || defined(__SUNPRO_C)) && defined(__x86_64__) && !defined(HAVE_TICK_COUNTER)
-typedef unsigned long long ticks;
-
-#ifndef INLINE
-# if __GNUC__ && !__GNUC_STDC_INLINE__
-# define INLINE extern inline
-# else
-# define INLINE inline
-# endif
-#endif
-INLINE ticks getticks(void)
-{
- unsigned a, d;
- asm volatile("rdtsc" : "=a" (a), "=d" (d));
- return ((ticks)a) | (((ticks)d) << 32);
-}
-
-INLINE_ELAPSED(__inline__)
-
-#define HAVE_TICK_COUNTER
-#endif
-
-/* PGI compiler, courtesy Cristiano Calonaci, Andrea Tarsi, & Roberto Gori.
- NOTE: this code will fail to link unless you use the -Masmkeyword compiler
- option (grrr). */
-#if defined(__PGI) && defined(__x86_64__) && !defined(HAVE_TICK_COUNTER)
-typedef unsigned long long ticks;
-static ticks getticks(void)
-{
- asm(" rdtsc; shl $0x20,%rdx; mov %eax,%eax; or %rdx,%rax; ");
-}
-INLINE_ELAPSED(__inline__)
-#define HAVE_TICK_COUNTER
-#endif
-
-/* Visual C++, courtesy of Dirk Michaelis */
-#if _MSC_VER >= 1400 && (defined(_M_AMD64) || defined(_M_X64)) && !defined(HAVE_TICK_COUNTER)
-
-#include <intrin.h>
-#pragma intrinsic(__rdtsc)
-typedef unsigned __int64 ticks;
-#define getticks __rdtsc
-INLINE_ELAPSED(__inline)
-
-#define HAVE_TICK_COUNTER
-#endif
-
-/*----------------------------------------------------------------*/
-/*
- * IA64 cycle counter
- */
-
-/* intel's icc/ecc compiler */
-#if (defined(__EDG_VERSION) || defined(__ECC)) && defined(__ia64__) && !defined(HAVE_TICK_COUNTER)
-typedef unsigned long ticks;
-#include <ia64intrin.h>
-
-static __inline__ ticks getticks(void)
-{
- return __getReg(_IA64_REG_AR_ITC);
-}
-
-INLINE_ELAPSED(__inline__)
-
-#define HAVE_TICK_COUNTER
-#endif
-
-/* gcc */
-#if defined(__GNUC__) && defined(__ia64__) && !defined(HAVE_TICK_COUNTER)
-typedef unsigned long ticks;
-
-static __inline__ ticks getticks(void)
-{
- ticks ret;
-
- __asm__ __volatile__ ("mov %0=ar.itc" : "=r"(ret));
- return ret;
-}
-
-INLINE_ELAPSED(__inline__)
-
-#define HAVE_TICK_COUNTER
-#endif
-
-/* HP/UX IA64 compiler, courtesy Teresa L. Johnson: */
-#if defined(__hpux) && defined(__ia64) && !defined(HAVE_TICK_COUNTER)
-#include <machine/sys/inline.h>
-typedef unsigned long ticks;
-
-static inline ticks getticks(void)
-{
- ticks ret;
-
- ret = _Asm_mov_from_ar (_AREG_ITC);
- return ret;
-}
-
-INLINE_ELAPSED(inline)
-
-#define HAVE_TICK_COUNTER
-#endif
-
-/* Microsoft Visual C++ */
-#if defined(_MSC_VER) && defined(_M_IA64) && !defined(HAVE_TICK_COUNTER)
-typedef unsigned __int64 ticks;
-
-# ifdef __cplusplus
-extern "C"
-# endif
-ticks __getReg(int whichReg);
-#pragma intrinsic(__getReg)
-
-static __inline ticks getticks(void)
-{
- volatile ticks temp;
- temp = __getReg(3116);
- return temp;
-}
-
-INLINE_ELAPSED(inline)
-
-#define HAVE_TICK_COUNTER
-#endif
-
-/*----------------------------------------------------------------*/
-/*
- * PA-RISC cycle counter
- */
-#if defined(__hppa__) || defined(__hppa) && !defined(HAVE_TICK_COUNTER)
-typedef unsigned long ticks;
-
-# ifdef __GNUC__
-static __inline__ ticks getticks(void)
-{
- ticks ret;
-
- __asm__ __volatile__("mfctl 16, %0": "=r" (ret));
- /* no input, nothing else clobbered */
- return ret;
-}
-# else
-# include <machine/inline.h>
-static inline unsigned long getticks(void)
-{
- register ticks ret;
- _MFCTL(16, ret);
- return ret;
-}
-# endif
-
-INLINE_ELAPSED(inline)
-
-#define HAVE_TICK_COUNTER
-#endif
-
-/*----------------------------------------------------------------*/
-/* S390, courtesy of James Treacy */
-#if defined(__GNUC__) && defined(__s390__) && !defined(HAVE_TICK_COUNTER)
-typedef unsigned long long ticks;
-
-static __inline__ ticks getticks(void)
-{
- ticks cycles;
- __asm__("stck 0(%0)" : : "a" (&(cycles)) : "memory", "cc");
- return cycles;
-}
-
-INLINE_ELAPSED(__inline__)
-
-#define HAVE_TICK_COUNTER
-#endif
-/*----------------------------------------------------------------*/
-#if defined(__GNUC__) && defined(__alpha__) && !defined(HAVE_TICK_COUNTER)
-/*
- * The 32-bit cycle counter on alpha overflows pretty quickly,
- * unfortunately. A 1GHz machine overflows in 4 seconds.
- */
-typedef unsigned int ticks;
-
-static __inline__ ticks getticks(void)
-{
- unsigned long cc;
- __asm__ __volatile__ ("rpcc %0" : "=r"(cc));
- return (cc & 0xFFFFFFFF);
-}
-
-INLINE_ELAPSED(__inline__)
-
-#define HAVE_TICK_COUNTER
-#endif
-
-/*----------------------------------------------------------------*/
-#if defined(__GNUC__) && defined(__sparc_v9__) && !defined(HAVE_TICK_COUNTER)
-typedef unsigned long ticks;
-
-static __inline__ ticks getticks(void)
-{
- ticks ret;
- __asm__ __volatile__("rd %%tick, %0" : "=r" (ret));
- return ret;
-}
-
-INLINE_ELAPSED(__inline__)
-
-#define HAVE_TICK_COUNTER
-#endif
-
-/*----------------------------------------------------------------*/
-#if (defined(__DECC) || defined(__DECCXX)) && defined(__alpha) && defined(HAVE_C_ASM_H) && !defined(HAVE_TICK_COUNTER)
-# include <c_asm.h>
-typedef unsigned int ticks;
-
-static __inline ticks getticks(void)
-{
- unsigned long cc;
- cc = asm("rpcc %v0");
- return (cc & 0xFFFFFFFF);
-}
-
-INLINE_ELAPSED(__inline)
-
-#define HAVE_TICK_COUNTER
-#endif
-/*----------------------------------------------------------------*/
-/* SGI/Irix */
-#if defined(HAVE_CLOCK_GETTIME) && defined(CLOCK_SGI_CYCLE) && !defined(HAVE_TICK_COUNTER)
-typedef struct timespec ticks;
-
-static inline ticks getticks(void)
-{
- struct timespec t;
- clock_gettime(CLOCK_SGI_CYCLE, &t);
- return t;
-}
-
-static inline double elapsed(ticks t1, ticks t0)
-{
- return ((double)t1.tv_sec - (double)t0.tv_sec) * 1.0E9 +
- ((double)t1.tv_nsec - (double)t0.tv_nsec);
-}
-#define HAVE_TICK_COUNTER
-#endif
-
-/*----------------------------------------------------------------*/
-/* Cray UNICOS _rtc() intrinsic function */
-#if defined(HAVE__RTC) && !defined(HAVE_TICK_COUNTER)
-#ifdef HAVE_INTRINSICS_H
-# include <intrinsics.h>
-#endif
-
-typedef long long ticks;
-
-#define getticks _rtc
-
-INLINE_ELAPSED(inline)
-
-#define HAVE_TICK_COUNTER
-#endif
-
-/*----------------------------------------------------------------*/
-/* MIPS ZBus */
-#if HAVE_MIPS_ZBUS_TIMER
-#if defined(__mips__) && !defined(HAVE_TICK_COUNTER)
-#include <sys/mman.h>
-#include <unistd.h>
-#include <fcntl.h>
-
-typedef uint64_t ticks;
-
-static inline ticks getticks(void)
-{
- static uint64_t* addr = 0;
-
- if (addr == 0)
- {
- uint32_t rq_addr = 0x10030000;
- int fd;
- int pgsize;
-
- pgsize = getpagesize();
- fd = open ("/dev/mem", O_RDONLY | O_SYNC, 0);
- if (fd < 0) {
- perror("open");
- return NULL;
- }
- addr = mmap(0, pgsize, PROT_READ, MAP_SHARED, fd, rq_addr);
- close(fd);
- if (addr == (uint64_t *)-1) {
- perror("mmap");
- return NULL;
- }
- }
-
- return *addr;
-}
-
-INLINE_ELAPSED(inline)
-
-#define HAVE_TICK_COUNTER
-#endif
-#endif /* HAVE_MIPS_ZBUS_TIMER */
-
diff --git a/examples/test.c b/examples/test.c
index 6a71fd0b29468d50d38dd965a4b90dccbd7770e8..427b761680bde8c96d23f576cbde792fb13519b2 100644
--- a/examples/test.c
+++ b/examples/test.c
@@ -571,7 +571,9 @@ int main ( int argc , char *argv[] ) {
message( "MPI is up and running with %i nodes." , nr_nodes );
fflush(stdout);
#endif
-
+
+ /* Greeting message */
+ message( "This is %s\n", package_description() );
/* Init the space. */
bzero( &s , sizeof(struct space) );
diff --git a/src/Makefile.am b/src/Makefile.am
index 8c6b3c335108ba6437c33deef0a5da899ab75dc8..f9aa25995a20d4aacebf74aa24cd7a9dfc4d2418 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -22,6 +22,9 @@ AM_CFLAGS = -DTIMER -DCOUNTER -DCPU_TPS=2.30e9
# Assign a "safe" version number
AM_LDFLAGS = $(LAPACK_LIBS) $(BLAS_LIBS) $(HDF5_LDFLAGS) -version-info 0:0:0 # -fsanitize=address
+# The git command, if available.
+GIT_CMD = @GIT_CMD@
+
# Build the libswiftsim library
lib_LTLIBRARIES = libswiftsim.la
# Build a MPI-enabled version too?
@@ -37,7 +40,7 @@ include_HEADERS = space.h runner.h queue.h task.h lock.h cell.h part.h const.h \
# Common source files
AM_SOURCES = space.c runner.c queue.c task.c cell.c engine.c \
serial_io.c timers.c debug.c scheduler.c proxy.c parallel_io.c \
- units.c common_io.c multipole.c
+ units.c common_io.c multipole.c version.c
# Include files for distribution, not installation.
noinst_HEADERS = atomic.h cycle.h error.h inline.h kernel.h vector.h \
@@ -52,3 +55,18 @@ libswiftsim_mpi_la_SOURCES = $(AM_SOURCES)
libswiftsim_mpi_la_CFLAGS = $(AM_CFLAGS) -DWITH_MPI
libswiftsim_mpi_la_SHORTNAME = mpi
+
+# Versioning. If any sources change then update the version.h file with
+# the current git revision and package version.
+version.h: version.h.in $(AM_SOURCES) $(include_HEADERS) $(noinst_HEADERS)
+ if test "X$(GIT_CMD)" != "X"; then \
+ GIT_REVISION=`git describe --abbrev=8 --always --tags --dirty`; \
+ sed -e "s,@PACKAGE_VERSION\@,$(PACKAGE_VERSION)," \
+ -e "s,@GIT_REVISION\@,$${GIT_REVISION}," version.h.in > version.h; \
+ fi
+
+# Make sure version.h is built first.
+BUILT_SOURCES = version.h
+
+# And distribute the built files.
+EXTRA_DIST = version.h version.h.in
diff --git a/src/swift.h b/src/swift.h
index 07b4ccf13211d511e1498b0385f8722e21629f5b..098092b29006e89a32ffada43284d9047132dbe0 100644
--- a/src/swift.h
+++ b/src/swift.h
@@ -41,7 +41,7 @@
#include "serial_io.h"
#include "parallel_io.h"
#include "debug.h"
-
+#include "version.h"
#ifdef LEGACY_GADGET2_SPH
#include "runner_iact_legacy.h"
diff --git a/src/version.c b/src/version.c
new file mode 100644
index 0000000000000000000000000000000000000000..705018b8726605e214cb02468f3baee628d8cf54
--- /dev/null
+++ b/src/version.c
@@ -0,0 +1,58 @@
+/*******************************************************************************
+ * This file is part of SWIFT.
+ * Copyright (C) 2012 Matthieu Schaller (matthieu.schaller@durham.ac.uk).
+ * Copyright (C) 2015 Peter W. Draper (p.w.draper@durham.ac.uk).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published
+ * by the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ ******************************************************************************/
+
+#include <stdio.h>
+#include "version.h"
+
+/**
+ * @brief Return the source code git revision
+ *
+ * @details The SHA of the code checked out when the library was last built.
+ * Will include -dirty if they are local modifications.
+ */
+const char *git_revision( void )
+{
+ static const char *revision = GIT_REVISION;
+ return revision;
+}
+
+/**
+ * @brief The version of SWIFT
+ */
+const char *package_version( void )
+{
+ static const char *version = PACKAGE_VERSION;
+ return version;
+}
+
+/**
+ * @brief A description of the package version and code status.
+ */
+const char *package_description( void )
+{
+ static char buf[256];
+ static int initialised = 0;
+ if ( ! initialised ) {
+ sprintf( buf, "SWIFT version: %s, at revision: %s",
+ PACKAGE_VERSION, GIT_REVISION );
+ initialised = 1;
+ }
+ return buf;
+}
diff --git a/src/version.h.in b/src/version.h.in
new file mode 100644
index 0000000000000000000000000000000000000000..e7b95a4ebf84efac35f1f65d514d98694583f10d
--- /dev/null
+++ b/src/version.h.in
@@ -0,0 +1,35 @@
+/*******************************************************************************
+ * This file is part of SWIFT.
+ * Copyright (c) 2012 Matthieu Schaller (matthieu.schaller@durham.ac.uk).
+ * Copyright (c) 2015 Peter W. Draper (p.w.draper@durham.ac.uk).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published
+ * by the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ ******************************************************************************/
+#ifndef SWIFT_VERSION_H
+#define SWIFT_VERSION_H
+
+/**
+ * @file version.h.in
+ * @brief Package version and git revision sha.
+ */
+
+#define PACKAGE_VERSION "@PACKAGE_VERSION@"
+#define GIT_REVISION "@GIT_REVISION@"
+
+const char* package_description( void );
+const char* package_version(void);
+const char* git_revision(void);
+
+#endif /* SWIFT_VERSION_H */