Use #if HAVE_* instead of #ifdef HAVE_*

tests/checkasm/checkasm.c

@@ -45,12 +45,12 @@
 #endif
 #else
 #include <time.h>
-#ifdef HAVE_UNISTD_H
+#if HAVE_UNISTD_H
 #include <unistd.h>
 #endif
-#ifdef HAVE_PTHREAD_SETAFFINITY_NP
+#if HAVE_PTHREAD_SETAFFINITY_NP
 #include <pthread.h>
-#ifdef HAVE_PTHREAD_NP_H
+#if HAVE_PTHREAD_NP_H
 #include <pthread_np.h>
 #endif
 #endif
@@ -736,7 +736,7 @@ int main(int argc, char *argv[]) {
             } else {
                 fprintf(stderr, "checkasm: running on cpu %lu\n", affinity);
             }
-#elif defined(HAVE_PTHREAD_SETAFFINITY_NP) && defined(CPU_SET)
+#elif HAVE_PTHREAD_SETAFFINITY_NP && defined(CPU_SET)
             cpu_set_t set;
             CPU_ZERO(&set);
             CPU_SET(affinity, &set);

tests/checkasm/checkasm.h

@@ -254,7 +254,7 @@ void checkasm_simd_warmup(void);
  * handled orthogonally from integer parameters passed in GPR registers. */
 #define IGNORED_FP_ARGS 8
 #endif
-#ifdef HAVE_C11_GENERIC
+#if HAVE_C11_GENERIC
 #define clobber_type(arg) _Generic((void (*)(void*, arg))NULL,\
      void (*)(void*, int32_t ): clobber_mask |= 1 << mpos++,\
      void (*)(void*, uint32_t): clobber_mask |= 1 << mpos++,\

tests/seek_stress.c

@@ -60,7 +60,7 @@ static unsigned get_seed(void) {
 static unsigned get_seed(void) {
 #ifdef __APPLE__
     return (unsigned) mach_absolute_time();
-#elif defined(HAVE_CLOCK_GETTIME)
+#elif HAVE_CLOCK_GETTIME
     struct timespec ts;
     clock_gettime(CLOCK_MONOTONIC, &ts);
     return (unsigned) (1000000000ULL * ts.tv_sec + ts.tv_nsec);