libitm fixes for musl support

On behalf of Szabolcs.Nagy@arm.com

2015-04-22  Gregor Richards  <gregor.richards@uwaterloo.ca>

       * config/arm/hwcap.cc: Use fcntl.h instead of sys/fcntl.h.
       * config/linux/x86/tls.h: Only use __GLIBC_PREREQ if defined.

From-SVN: r222325

libitm/ChangeLog

+2015-04-22  Gregor Richards  <gregor.richards@uwaterloo.ca>
+
+	* config/arm/hwcap.cc: Use fcntl.h instead of sys/fcntl.h.
+	* config/linux/x86/tls.h: Only use __GLIBC_PREREQ if defined.
+
 2015-01-15  H.J. Lu  <hongjiu.lu@intel.com>
 
 	PR libitm/64360

libitm/config/arm/hwcap.cc

@@ -40,7 +40,7 @@ int GTM_hwcap HIDDEN = 0
 
 #ifdef __linux__
 #include <unistd.h>
-#include <sys/fcntl.h>
+#include <fcntl.h>
 #include <elf.h>
 
 static void __attribute__((constructor))

libitm/config/linux/x86/tls.h

@@ -25,16 +25,19 @@
 #ifndef LIBITM_X86_TLS_H
 #define LIBITM_X86_TLS_H 1
 
-#if defined(__GLIBC_PREREQ) && __GLIBC_PREREQ(2, 10)
+#if defined(__GLIBC_PREREQ)
+#if __GLIBC_PREREQ(2, 10)
 /* Use slots in the TCB head rather than __thread lookups.
    GLIBC has reserved words 10 through 13 for TM.  */
 #define HAVE_ARCH_GTM_THREAD 1
 #define HAVE_ARCH_GTM_THREAD_DISP 1
 #endif
+#endif
 
 #include "config/generic/tls.h"
 
-#if defined(__GLIBC_PREREQ) && __GLIBC_PREREQ(2, 10)
+#if defined(__GLIBC_PREREQ)
+#if __GLIBC_PREREQ(2, 10)
 namespace GTM HIDDEN {
 
 #ifdef __x86_64__
@@ -101,5 +104,6 @@ static inline void set_abi_disp(struct abi_dispatch *x)
 
 } // namespace GTM
 #endif /* >= GLIBC 2.10 */
+#endif
 
 #endif // LIBITM_X86_TLS_H