[PATCH 10/23] [AARCH64] Detect ILP32 in configure scripts.

[Yury Norov <ynorov@caviumnetworks.com>]

From: Andrew Pinski <apinski@cavium.com>

This adds detecting of ILP32 to the configure scripts.
Adding to preconfigure detection of ilp32 in preconfigure and then writing out the default-abi in configure.

* sysdeps/aarch64/preconfigure: Detect ILP32 and set aarch64_config_abi
to ilp32 for ilp32 and lp64 for lp64.  Set machine to either
aarch64/ilp32 or aarch64/lp64 depending on the ABI that is selected.
* sysdeps/aarch64/configure.ac: Define HAVE_AARCH64_ILP32 if this is ILP32.
Set the default-abi to either ilp32, lp64, ilp32_be or lp64_be depending
on the ABI.
* sysdeps/aarch64/configure: Regenerate.
* sysdeps/unix/sysv/linux/aarch64/configure.ac: Set arch_minimum_kernel
to 3.19.0 for ILP32.
Set LIBC_SLIBDIR_RTLDDIR to libilp32/lib for ilp32.
* sysdeps/unix/sysv/linux/aarch64/configure: Regenerate.

Signed-off-by: Yury Norov <ynorov@caviumnetworks.com>
---
 sysdeps/aarch64/configure                    | 15 +++++++++++----
 sysdeps/aarch64/configure.ac                 | 11 +++++++++--
 sysdeps/aarch64/preconfigure                 | 11 ++++++++++-
 sysdeps/unix/sysv/linux/aarch64/configure    | 22 +++++++++++++++++++---
 sysdeps/unix/sysv/linux/aarch64/configure.ac |  9 +++++++--
 5 files changed, 56 insertions(+), 12 deletions(-)
 mode change 100644 => 100755 sysdeps/aarch64/configure
 mode change 100644 => 100755 sysdeps/unix/sysv/linux/aarch64/configure

diff --git a/sysdeps/aarch64/configure b/sysdeps/aarch64/configure
old mode 100644
new mode 100755
index 5bd355a..7dd56e8
--- a/sysdeps/aarch64/configure
+++ b/sysdeps/aarch64/configure
@@ -163,12 +163,19 @@ rm -f conftest*
 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_aarch64_be" >&5
 $as_echo "$libc_cv_aarch64_be" >&6; }
+
+if test $aarch64_config_abi = ilp32; then
+  $as_echo "#define HAVE_AARCH64_ILP32 1" >>confdefs.h
+
+fi
+
 if test $libc_cv_aarch64_be = yes; then
   $as_echo "#define HAVE_AARCH64_BE 1" >>confdefs.h
 
-  config_vars="$config_vars
-default-abi = lp64_be"
+  libc_aarch64_be=_be
 else
-  config_vars="$config_vars
-default-abi = lp64"
+  libc_aarch64_be=
 fi
+
+config_vars="$config_vars
+default-abi = ${aarch64_config_abi}${libc_aarch64_be}"
diff --git a/sysdeps/aarch64/configure.ac b/sysdeps/aarch64/configure.ac
index 7851dd4..9069325 100644
--- a/sysdeps/aarch64/configure.ac
+++ b/sysdeps/aarch64/configure.ac
@@ -14,9 +14,16 @@ AC_CACHE_CHECK([for big endian],
                       yes
                      #endif
   ], libc_cv_aarch64_be=yes, libc_cv_aarch64_be=no)])
+
+if test $aarch64_config_abi = ilp32; then
+  AC_DEFINE(HAVE_AARCH64_ILP32)
+fi
+
 if test $libc_cv_aarch64_be = yes; then
   AC_DEFINE(HAVE_AARCH64_BE)
-  LIBC_CONFIG_VAR([default-abi], [lp64_be])
+  libc_aarch64_be=_be
 else
-  LIBC_CONFIG_VAR([default-abi], [lp64])
+  libc_aarch64_be=
 fi
+
+LIBC_CONFIG_VAR([default-abi], [${aarch64_config_abi}${libc_aarch64_be}])
diff --git a/sysdeps/aarch64/preconfigure b/sysdeps/aarch64/preconfigure
index d9bd1f8..4bcd8e3 100644
--- a/sysdeps/aarch64/preconfigure
+++ b/sysdeps/aarch64/preconfigure
@@ -1,6 +1,15 @@
 case "$machine" in
 aarch64*)
 	base_machine=aarch64
-	machine=aarch64
+	case "$CC $CFLAGS $CPPFLAGS " in
+		*" -mabi=ilp32 "*) aarch64_config_abi=ilp32 ;;
+		*" -mabi=lp64 "*) aarch64_config_abi=lp64 ;;
+		*) aarch64_config_abi=default ;;
+	esac
+	case $aarch64_config_abi in
+		default) machine=aarch64/lp64 aarch64_config_abi=lp64 ;;
+		ilp32) machine=aarch64/ilp32 ;;
+		lp64) machine=aarch64/lp64 ;;
+	esac
 	;;
 esac
diff --git a/sysdeps/unix/sysv/linux/aarch64/configure b/sysdeps/unix/sysv/linux/aarch64/configure
old mode 100644
new mode 100755
index f48472c..c6fca86
--- a/sysdeps/unix/sysv/linux/aarch64/configure
+++ b/sysdeps/unix/sysv/linux/aarch64/configure
@@ -1,9 +1,23 @@
 # This file is generated from configure.ac by Autoconf.  DO NOT EDIT!
  # Local configure fragment for sysdeps/unix/sysv/linux/aarch64.
 
-arch_minimum_kernel=3.7.0
-
-test -n "$libc_cv_slibdir" ||
+if test $aarch64_config_abi = ilp32; then
+  arch_minimum_kernel=3.19.0
+  test -n "$libc_cv_slibdir" ||
+case "$prefix" in
+/usr | /usr/)
+  libc_cv_slibdir=/libilp32
+  libc_cv_rtlddir=/lib
+  if test "$libdir" = '${exec_prefix}/lib'; then
+    libdir='${exec_prefix}/libilp32';
+    # Locale data can be shared between 32-bit and 64-bit libraries.
+    libc_cv_complocaledir='${exec_prefix}/lib/locale'
+  fi
+  ;;
+esac
+else
+  arch_minimum_kernel=3.7.0
+  test -n "$libc_cv_slibdir" ||
 case "$prefix" in
 /usr | /usr/)
   libc_cv_slibdir=/lib64
@@ -15,3 +29,5 @@ case "$prefix" in
   fi
   ;;
 esac
+fi
+
diff --git a/sysdeps/unix/sysv/linux/aarch64/configure.ac b/sysdeps/unix/sysv/linux/aarch64/configure.ac
index 211fa9c..b37a7eb 100644
--- a/sysdeps/unix/sysv/linux/aarch64/configure.ac
+++ b/sysdeps/unix/sysv/linux/aarch64/configure.ac
@@ -1,6 +1,11 @@
 GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory.
 # Local configure fragment for sysdeps/unix/sysv/linux/aarch64.
 
-arch_minimum_kernel=3.7.0
+if test $aarch64_config_abi = ilp32; then
+  arch_minimum_kernel=10.0.0
+  LIBC_SLIBDIR_RTLDDIR([libilp32], [lib])
+else
+  arch_minimum_kernel=3.7.0
+  LIBC_SLIBDIR_RTLDDIR([lib64], [lib])
+fi
 
-LIBC_SLIBDIR_RTLDDIR([lib64], [lib])
-- 
2.7.4