[2.24] powerpc: Prevent building POWER8 code without support in assembler
Commit Message
Confirm if the assembler supports the submachine specified at --with-cpu
or required by --enable-multi-arch preventing errors at build time.
The minimum Binutils version supported (v2.22) doesn't support POWER8
which is used on --enable-multi-arch.
2016-07-20 Tulio Magno Quites Machado Filho <tuliom@linux.vnet.ibm.com>
* sysdeps/powerpc/configure: Auto-generate.
* sysdeps/powerpc/configure.ac: Check if the assembler supports
the submachine.
---
sysdeps/powerpc/configure | 52 ++++++++++++++++++++++++++++++++++++++++++++
sysdeps/powerpc/configure.ac | 43 ++++++++++++++++++++++++++++++++++++
2 files changed, 95 insertions(+)
create mode 100644 sysdeps/powerpc/configure
create mode 100644 sysdeps/powerpc/configure.ac
new file mode 100644
@@ -0,0 +1,52 @@
+# This file is generated from configure.ac by Autoconf. DO NOT EDIT!
+ # Local configure fragment for sysdeps/powerpc.
+
+# The minimum Binutils version required by glibc may not support all the
+# processors supported by glibc, e.g. Binutils 2.22 supports POWER7 at most.
+libc_cv_ppc_cpu_min=
+libc_cv_ppc_cpu_msg=
+
+if test x"$multi_arch" != xno ; then
+ libc_cv_ppc_cpu_min=power8
+ libc_cv_ppc_cpu_msg=", required by --enable-multi-arch"
+fi
+
+if test -n "$submachine"; then
+ case "$submachine" in
+ # List of the submachines not supported by the minimum required Binutils.
+ power8|power9)
+ libc_cv_ppc_cpu_min=$submachine
+ libc_cv_ppc_cpu_msg=
+ ;;
+ esac
+fi
+
+if test -n "$libc_cv_ppc_cpu_min"; then
+ { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $libc_cv_ppc_cpu_min support in assembler" >&5
+$as_echo_n "checking for $libc_cv_ppc_cpu_min support in assembler... " >&6; }
+if ${libc_cv_ppc_machine+:} false; then :
+ $as_echo_n "(cached) " >&6
+else
+ cat > conftest.s <<EOF
+ .machine "$libc_cv_ppc_cpu_min"
+ blr
+EOF
+if { ac_try='${CC-cc} -c $CFLAGS conftest.s 1>&5'
+ { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
+ (eval $ac_try) 2>&5
+ ac_status=$?
+ $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+ test $ac_status = 0; }; }; then
+ libc_cv_ppc_machine=yes
+else
+ libc_cv_ppc_machine=no
+fi
+rm -f conftest*
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_ppc_machine" >&5
+$as_echo "$libc_cv_ppc_machine" >&6; }
+ if test $libc_cv_ppc_machine != yes; then
+ as_fn_error $? "The assembler does not support $libc_cv_ppc_cpu_min\
+$libc_cv_ppc_cpu_msg." "$LINENO" 5
+ fi
+fi
new file mode 100644
@@ -0,0 +1,43 @@
+GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory.
+# Local configure fragment for sysdeps/powerpc.
+
+# The minimum Binutils version required by glibc may not support all the
+# processors supported by glibc, e.g. Binutils 2.22 supports POWER7 at most.
+libc_cv_ppc_cpu_min=
+libc_cv_ppc_cpu_msg=
+
+if test x"$multi_arch" != xno ; then
+ dnl Multiarch build requires POWER8 support.
+ libc_cv_ppc_cpu_min=power8
+ libc_cv_ppc_cpu_msg=", required by --enable-multi-arch"
+fi
+
+if test -n "$submachine"; then
+ case "$submachine" in
+ # List of the submachines not supported by the minimum required Binutils.
+ power8|power9)
+ libc_cv_ppc_cpu_min=$submachine
+ libc_cv_ppc_cpu_msg=
+ ;;
+ esac
+fi
+
+if test -n "$libc_cv_ppc_cpu_min"; then
+ dnl Check if asm supports the minimum cpu.
+ AC_CACHE_CHECK([for $libc_cv_ppc_cpu_min support in assembler],
+ libc_cv_ppc_machine, [dnl
+cat > conftest.s <<EOF
+ .machine "$libc_cv_ppc_cpu_min"
+ blr
+EOF
+if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
+ libc_cv_ppc_machine=yes
+else
+ libc_cv_ppc_machine=no
+fi
+rm -f conftest*])
+ if test $libc_cv_ppc_machine != yes; then
+ AC_MSG_ERROR([The assembler does not support $libc_cv_ppc_cpu_min\
+$libc_cv_ppc_cpu_msg.])
+ fi
+fi