Emit .note.GNU-stack for hard-float linux targets.

libgcc/ChangeLog:

2020-01-23  Dragan Mladjenovic  <dmladjenovic@wavecomp.com>

	* config/mips/gnustack.h: Check for TARGET_LIBC_GNUSTACK also.

gcc/ChangeLog:

2020-01-23  Dragan Mladjenovic  <dmladjenovic@wavecomp.com>

	* config.in: Regenerated.
	* config/mips/linux.h (NEED_INDICATE_EXEC_STACK): Define to 1
	for TARGET_LIBC_GNUSTACK.
	* configure: Regenerated.
	* configure.ac: Define TARGET_LIBC_GNUSTACK if glibc version is
	found to be 2.31 or greater.

gcc/ChangeLog

 2020-01-23  Dragan Mladjenovic  <dmladjenovic@wavecomp.com>
 
+	* config.in: Regenerated.
+	* config/mips/linux.h (NEED_INDICATE_EXEC_STACK): Define to 1
+	for TARGET_LIBC_GNUSTACK.
+	* configure: Regenerated.
+	* configure.ac: Define TARGET_LIBC_GNUSTACK if glibc version is
+	found to be 2.31 or greater.
+
+2020-01-23  Dragan Mladjenovic  <dmladjenovic@wavecomp.com>
+
 	* config/mips/linux.h (NEED_INDICATE_EXEC_STACK): Define to
 	TARGET_SOFT_FLOAT.
 	* config/mips/mips.c (TARGET_ASM_FILE_END): Define to ...

gcc/config/mips/linux.h

@@ -53,4 +53,8 @@ along with GCC; see the file COPYING3.  If not see
 
 #undef NEED_INDICATE_EXEC_STACK
 
+#ifdef TARGET_LIBC_GNUSTACK
+#define NEED_INDICATE_EXEC_STACK 1
+#else
 #define NEED_INDICATE_EXEC_STACK TARGET_SOFT_FLOAT
+#endif

gcc/configure.ac

@@ -6247,6 +6247,18 @@ if test x$gcc_cv_libc_provides_hwcap_in_tcb = xyes; then
 	    [Define if your target C Library provides the AT_HWCAP value in the TCB])
 fi
 
+# Check if the target LIBC handles PT_GNU_STACK.
+gcc_cv_libc_gnustack=unknown
+case "$target" in
+  mips*-*-linux*)
+    GCC_GLIBC_VERSION_GTE_IFELSE([2], [31], [gcc_cv_libc_gnustack=yes], )
+    ;;
+esac
+if test x$gcc_cv_libc_gnustack = xyes; then
+  AC_DEFINE(TARGET_LIBC_GNUSTACK, 1,
+            [Define if your target C Library properly handles PT_GNU_STACK])
+fi
+
 AC_MSG_CHECKING(dl_iterate_phdr in target C library)
 gcc_cv_target_dl_iterate_phdr=unknown
 case "$target" in

libgcc/ChangeLog

 2020-01-23  Dragan Mladjenovic  <dmladjenovic@wavecomp.com>
 
+	* config/mips/gnustack.h: Check for TARGET_LIBC_GNUSTACK also.
+
+2020-01-23  Dragan Mladjenovic  <dmladjenovic@wavecomp.com>
+
 	* config/mips/gnustack.h: New file.
 	* config/mips/crti.S: Include gnustack.h.
 	* config/mips/crtn.S: Likewise.

libgcc/config/mips/gnustack.h

 #include "config.h"
 #if defined(__ELF__) && defined(__linux__)
-#if defined (__mips_soft_float)
+#if defined (TARGET_LIBC_GNUSTACK) || defined (__mips_soft_float)
 	.section .note.GNU-stack,"",%progbits
 	.previous
 #endif