From a27d2c19355a15569dfcdd5da741b57acf1a106a Mon Sep 17 00:00:00 2001
From: "Gabriel F. T. Gomes" <gftg@linux.vnet.ibm.com>
Date: Mon, 5 Jun 2017 16:18:54 -0300
Subject: powerpc64le: Require at least POWER8 for powerpc64le

Support for powerpc64le requires POWER8 or newer processors.  Builds for
older processors are not tested.  Require at least POWER8 to avoid
unintentional builds.

	* sysdeps/powerpc/powerpc64le/configure.ac: Check for POWER8.
	* sysdeps/powerpc/powerpc64le/configure: Update.
---
 ChangeLog                                |  5 +++++
 sysdeps/powerpc/powerpc64le/configure    | 30 ++++++++++++++++++++++++++++++
 sysdeps/powerpc/powerpc64le/configure.ac | 16 ++++++++++++++++
 3 files changed, 51 insertions(+)

diff --git a/ChangeLog b/ChangeLog
index e0968afc8b..2cfe569757 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2017-06-26  Gabriel F. T. Gomes  <gftg@linux.vnet.ibm.com>
+
+	* sysdeps/powerpc/powerpc64le/configure.ac: Check for POWER8.
+	* sysdeps/powerpc/powerpc64le/configure: Update.
+
 2017-06-26  Gabriel F. T. Gomes  <gftg@linux.vnet.ibm.com>
 	    Tulio Magno Quites Machado Filho  <tuliom@linux.vnet.ibm.com>
 
diff --git a/sysdeps/powerpc/powerpc64le/configure b/sysdeps/powerpc/powerpc64le/configure
index 78208d2eda..66bb5dcc1a 100644
--- a/sysdeps/powerpc/powerpc64le/configure
+++ b/sysdeps/powerpc/powerpc64le/configure
@@ -42,4 +42,34 @@ if test "$libc_cv_compiler_powerpc64le_binary128_ok" != "yes"; then :
   critic_missing="$critic_missing binary128 floating point type (GCC >= 6.2) is required on powerpc64le."
 fi
 
+OLD_CFLAGS="$CFLAGS"
+CFLAGS="$CFLAGS $libc_cv_cc_submachine"
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if the target machine is at least POWER8" >&5
+$as_echo_n "checking if the target machine is at least POWER8... " >&6; }
+if ${libc_cv_target_power8_ok+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#ifndef _ARCH_PWR8
+#error invalid target architecture
+#endif
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  libc_cv_target_power8_ok=yes
+else
+  libc_cv_target_power8_ok=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_target_power8_ok" >&5
+$as_echo "$libc_cv_target_power8_ok" >&6; }
+if test "$libc_cv_target_power8_ok" != "yes"; then :
+  critic_missing="$critic_missing POWER8 or newer is required on powerpc64le."
+fi
+CFLAGS="$OLD_CFLAGS"
+
 test -n "$critic_missing" && as_fn_error $? "*** $critic_missing" "$LINENO" 5
diff --git a/sysdeps/powerpc/powerpc64le/configure.ac b/sysdeps/powerpc/powerpc64le/configure.ac
index e88e224ae1..20a49d89e8 100644
--- a/sysdeps/powerpc/powerpc64le/configure.ac
+++ b/sysdeps/powerpc/powerpc64le/configure.ac
@@ -29,4 +29,20 @@ CFLAGS="$save_CFLAGS"])
 AS_IF([test "$libc_cv_compiler_powerpc64le_binary128_ok" != "yes"],
       [critic_missing="$critic_missing binary128 floating point type (GCC >= 6.2) is required on powerpc64le."])
 
+dnl Require at least POWER8 on powerpc64le
+OLD_CFLAGS="$CFLAGS"
+CFLAGS="$CFLAGS $libc_cv_cc_submachine"
+AC_CACHE_CHECK([if the target machine is at least POWER8],
+	       libc_cv_target_power8_ok, [
+AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
+#ifndef _ARCH_PWR8
+#error invalid target architecture
+#endif
+]])],
+	       [libc_cv_target_power8_ok=yes],
+	       [libc_cv_target_power8_ok=no])])
+AS_IF([test "$libc_cv_target_power8_ok" != "yes"],
+      [critic_missing="$critic_missing POWER8 or newer is required on powerpc64le."])
+CFLAGS="$OLD_CFLAGS"
+
 test -n "$critic_missing" && AC_MSG_ERROR([*** $critic_missing])
-- 
cgit 1.4.1