1 files changed, 74 insertions, 0 deletions
diff --git a/scripts/build/arch/sparc.sh b/scripts/build/arch/sparc.sh
index e3e74913..74f6f785 100644
--- a/scripts/build/arch/sparc.sh
+++ b/scripts/build/arch/sparc.sh
@@ -2,4 +2,78 @@
 CT_DoArchTupleValues() {
     # That's the only thing to override
     CT_TARGET_ARCH="sparc${target_bits_64}${CT_ARCH_SUFFIX}"
+
+    # By default, sparc64-*-linux is configured with -mcpu=v9. However,
+    # according to https://sourceware.org/ml/libc-alpha/2005-12/msg00027.html,
+    # "There is no Linux sparc64 port that runs on non-UltraSPARC-I+ ISA CPUs."
+    # There is a patch that would change the default to -mcpu=ultrasparc for
+    # sparc64-*-linux configuration: https://patchwork.ozlabs.org/patch/409424/
+    # but that patch has not been integrated (yet). One concern raised about
+    # this patch was that -mcpu=ultrasparc can suboptimally schedule instructions
+    # for newer SPARC CPUs. So, override to -mcpu=ultrasparc and warn the user.
+    if [ "${CT_KERNEL}" = "linux" -a "${CT_ARCH_64}" = "y" -a -z "${CT_ARCH_CPU}" ]; then
+        CT_DoLog WARN "Setting CPU to UltraSPARC-I for sparc64-linux. Set CT_ARCH_CPU if a different CPU is desired."
+        CT_ARCH_WITH_CPU="--with-cpu=ultrasparc"
+    fi
+}
+
+#------------------------------------------------------------------------------
+# Get multilib architecture-specific target
+# Usage: CT_DoArchMultilibTarget "target variable" "multilib flags"
+CT_DoArchMultilibTarget ()
+{
+    local target_var="${1}"; shift
+    local -a multi_flags=( "$@" )
+    local target_
+
+    local m32=false
+    local m64=false
+
+    for m in "${multi_flags[@]}"; do
+        case "$m" in
+            -m32)     m32=true ;;
+            -m64)     m64=true ;;
+        esac
+    done
+
+    eval target_=\"\${${target_var}}\"
+
+    # Fix up bitness
+    case "${target_}" in
+        sparc-*)      $m64 && target_=${target_/#sparc-/sparc64-} ;;
+        sparc64-*)    $m32 && target_=${target_/#sparc64-/sparc-} ;;
+    esac
+
+    # Set the target variable
+    eval ${target_var}=\"${target_}\"
+}
+
+# Special tuple adjustment for glibc.
+CT_DoArchGlibcAdjustTuple() {
+    local target_var="${1}"
+    local target_
+
+    eval target_=\"\${${target_var}}\"
+
+    case "${target_}" in
+        # SPARC quirk: glibc 2.23 and newer dropped support for SPARCv8 and
+        # earlier (corresponding pthread barrier code is missing). Until this
+        # support is reintroduced, configure as sparcv9.
+        sparc-*)
+            if [ "${CT_LIBC_GLIBC_2_23_or_later}" = y ]; then
+                CT_DoLog WARN "GLIBC 2.23 only supports SPARCv9"
+                target_=${target_/#sparc-/sparcv9-}
+            fi
+            ;;
+    esac
+
+    # Set the target variable
+    eval ${target_var}=\"${target_}\"
+}
+
+CT_DoArchUClibcConfig() {
+    local cfg="${1}"
+
+    CT_DoArchUClibcSelectArch "${cfg}" "${CT_ARCH}"
+    # FIXME: select CONFIG_SPARC_V7/V8/V9/V9B according to the CPU selector
 }