Make the unit tests ignore FPEs if we can't activate them on this platform. Do...

Make the unit tests ignore FPEs if we can't activate them on this platform. Do not run the dump and logger tests if the file allocation POSIX functions don't exist.

tests/test125cells.c

@@ -469,8 +469,10 @@ int main(int argc, char *argv[]) {
   unsigned long long cpufreq = 0;
   clocks_set_cpufreq(cpufreq);
 
-  /* Choke on FP-exceptions */
+/* Choke on FP-exceptions */
+#ifdef HAVE_FE_ENABLE_EXCEPT
   feenableexcept(FE_DIVBYZERO | FE_INVALID | FE_OVERFLOW);
+#endif
 
   /* Get some randomness going */
   srand(0);

tests/test27cells.c

@@ -316,8 +316,10 @@ int main(int argc, char *argv[]) {
   unsigned long long cpufreq = 0;
   clocks_set_cpufreq(cpufreq);
 
-  /* Choke on FP-exceptions */
+/* Choke on FP-exceptions */
+#ifdef HAVE_FE_ENABLE_EXCEPT
   feenableexcept(FE_DIVBYZERO | FE_INVALID | FE_OVERFLOW);
+#endif
 
   /* Get some randomness going */
   srand(0);

tests/testActivePair.c

@@ -393,8 +393,10 @@ int main(int argc, char *argv[]) {
   unsigned long long cpufreq = 0;
   clocks_set_cpufreq(cpufreq);
 
-  /* Choke on FP-exceptions */
+/* Choke on FP-exceptions */
+#ifdef HAVE_FE_ENABLE_EXCEPT
   feenableexcept(FE_DIVBYZERO | FE_INVALID | FE_OVERFLOW);
+#endif
 
   /* Generate a RNG seed from time. */
   unsigned int seed = time(NULL);

tests/testDump.c

@@ -20,6 +20,8 @@
 /* Config parameters. */
 #include "../config.h"
 
+#ifdef HAVE_POSIX_FALLOCATE /* Are we on a sensible platform? */
+
 /* Some standard headers. */
 #include <errno.h>
 #include <fcntl.h>
@@ -85,3 +87,9 @@ int main(int argc, char *argv[]) {
   /* Return a happy number. */
   return 0;
 }
+
+#else
+
+int main() { return 0; }
+
+#endif /* HAVE_POSIX_FALLOCATE */

tests/testLogger.c

@@ -20,6 +20,8 @@
 /* Config parameters. */
 #include "../config.h"
 
+#ifdef HAVE_POSIX_FALLOCATE /* Are we on a sensible platform? */
+
 /* Some standard headers. */
 #include <stdio.h>
 #include <stdlib.h>
@@ -245,3 +247,9 @@ int main(int argc, char *argv[]) {
   printf("PASS\n");
   return 0;
 }
+
+#else
+
+int main() { return 0; }
+
+#endif /* HAVE_POSIX_FALLOCATE */

tests/testPeriodicBC.c

@@ -391,8 +391,10 @@ int main(int argc, char *argv[]) {
   unsigned long long cpufreq = 0;
   clocks_set_cpufreq(cpufreq);
 
-  /* Choke on FP-exceptions */
+/* Choke on FP-exceptions */
+#ifdef HAVE_FE_ENABLE_EXCEPT
   feenableexcept(FE_DIVBYZERO | FE_INVALID | FE_OVERFLOW);
+#endif
 
   /* Get some randomness going */
   srand(0);

tests/testSymmetry.c

@@ -28,8 +28,10 @@
 
 int main(int argc, char *argv[]) {
 
-  /* Choke if need be */
+/* Choke on FPEs */
+#ifdef HAVE_FE_ENABLE_EXCEPT
   feenableexcept(FE_DIVBYZERO | FE_INVALID | FE_OVERFLOW);
+#endif
 
 #if defined(SHADOWFAX_SPH)
   /* Initialize the Voronoi simulation box */