re PR libstdc++/11953 (_REENTRANT defined when compiling non-threaded code.)

	PR libstdc++/11953
	* gthr-posix.h (_REENTRANT): Only define if __osf__ is defined.

	* config/ia64/linux.h (CPP_SPEC): Define.
	* config/s390/linux.h (CPP_SPEC): Define.

From-SVN: r119788

gcc/ChangeLog

+2006-12-12  Jakub Jelinek  <jakub@redhat.com>
+
+	PR libstdc++/11953
+	* gthr-posix.h (_REENTRANT): Only define if __osf__ is defined.
+
+	* config/ia64/linux.h (CPP_SPEC): Define.
+	* config/s390/linux.h (CPP_SPEC): Define.
+
 2006-12-12  Jim Wilson  <wilson@specifix.com>
 	    Jakub Jelinek  <jakub@redhat.com>
 

gcc/config/ia64/linux.h

@@ -48,6 +48,7 @@ do {						\
       %{!dynamic-linker:-dynamic-linker " LINUX_DYNAMIC_LINKER "}} \
       %{static:-static}}"
 
+#define CPP_SPEC "%{posix:-D_POSIX_SOURCE} %{pthread:-D_REENTRANT}"
 
 #define JMP_BUF_SIZE  76
 

gcc/config/s390/linux.h

@@ -88,6 +88,7 @@ Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
           %{m31:-dynamic-linker " LINUX_DYNAMIC_LINKER32 "} \
           %{m64:-dynamic-linker " LINUX_DYNAMIC_LINKER64 "}}}}"
 
+#define CPP_SPEC "%{posix:-D_POSIX_SOURCE} %{pthread:-D_REENTRANT}"
 
 #define TARGET_ASM_FILE_END file_end_indicate_exec_stack
 

gcc/gthr-posix.h

@@ -36,7 +36,7 @@ Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
 #define __GTHREADS 1
 
 /* Some implementations of <pthread.h> require this to be defined.  */
-#ifndef _REENTRANT
+#if !defined(_REENTRANT) && defined(__osf__)
 #define _REENTRANT 1
 #endif