Merge branch 'master' into janitorial

config/cc/gcc.in

@@ -160,6 +160,7 @@ config CC_GCC_5
     select CC_GCC_HAS_LNK_HASH_STYLE
     select CC_GCC_HAS_LIBQUADMATH
     select CC_GCC_HAS_LIBSANITIZER
+    select CC_GCC_HAS_LIBMPX
     select CC_SUPPORT_GOLANG
 
 config CC_GCC_5_or_later
@@ -178,6 +179,7 @@ config CC_GCC_6
     select CC_GCC_HAS_LNK_HASH_STYLE
     select CC_GCC_HAS_LIBQUADMATH
     select CC_GCC_HAS_LIBSANITIZER
+    select CC_GCC_HAS_LIBMPX
     select CC_SUPPORT_GOLANG
 
 config CC_GCC_6_or_later
@@ -276,6 +278,9 @@ config CC_GCC_HAS_LIBQUADMATH
 config CC_GCC_HAS_LIBSANITIZER
     bool
 
+config CC_GCC_HAS_LIBMPX
+    bool
+
 if ! CC_GCC_CUSTOM
 
 config CC_GCC_VERSION

config/cc/gcc.in.2

@@ -182,6 +182,16 @@ config CC_GCC_LIBSANITIZER
 
       The default is 'N'. Say 'Y' if you need it, and report success/failure.
 
+config CC_GCC_LIBMPX
+    bool
+    default y
+    prompt "Compile libmpx"
+    depends on CC_GCC_HAS_LIBMPX
+    depends on ARCH_x86
+    depends on !LIBC_musl # MUSL does not define libc types that GCC requires
+    help
+      Enable GCC support for Intel Memory Protection Extensions (MPX).
+
 #-----------------------------------------------------------------------------
 
 comment "Misc. obscure options."

scripts/build/cc/100-gcc.sh

@@ -436,6 +436,7 @@ do_gcc_core_backend() {
 
     extra_config+=(--disable-libgomp)
     extra_config+=(--disable-libmudflap)
+    extra_config+=(--disable-libmpx)
 
     if [ "${CT_CC_GCC_LIBSSP}" = "y" ]; then
         extra_config+=(--enable-libssp)
@@ -769,6 +770,23 @@ do_gcc_for_build() {
     CT_EndStep
 }
 
+gcc_movelibs() {
+    local multi_flags multi_dir multi_os_dir multi_root multi_index multi_count
+    local gcc_dir
+
+    for arg in "$@"; do
+        eval "${arg// /\\ }"
+    done
+
+    # Move only files, directories are for other multilibs
+    gcc_dir="${CT_PREFIX_DIR}/${CT_TARGET}/lib/${multi_os_dir}"
+    ls "${gcc_dir}" | while read f; do
+        if [ -f "${gcc_dir}/${f}" ]; then
+            CT_DoExecLog ALL mv "${gcc_dir}/${f}" "${multi_root}/lib/${multi_os_dir}/${f}"
+        fi
+    done
+}
+
 #------------------------------------------------------------------------------
 # Build final gcc to run on host
 do_gcc_for_host() {
@@ -800,10 +818,18 @@ do_gcc_for_host() {
 
     CT_DoStep INFO "Installing final gcc compiler"
     CT_mkdir_pushd "${CT_BUILD_DIR}/build-cc-gcc-final"
-
     "${final_backend}" "${final_opts[@]}"
-
     CT_Popd
+
+    # GCC installs stuff (including libgcc) into its own /lib dir,
+    # outside of sysroot, breaking linking with -static-libgcc.
+    # Fix up by moving the libraries into the sysroot.
+    if [ "${CT_USE_SYSROOT}" = "y" ]; then
+        CT_mkdir_pushd "${CT_BUILD_DIR}/build-cc-gcc-final-movelibs"
+        CT_IterateMultilibs gcc_movelibs movelibs
+        CT_Popd
+    fi
+
     CT_EndStep
 }
 
@@ -904,6 +930,14 @@ do_gcc_backend() {
         fi
     fi
 
+    if [ "${CT_CC_GCC_HAS_LIBMPX}" = "y" ]; then
+        if [ "${CT_CC_GCC_LIBMPX}" = "y" ]; then
+            extra_config+=(--enable-libmpx)
+        else
+            extra_config+=(--disable-libmpx)
+        fi
+    fi
+
     final_LDFLAGS+=("${ldflags}")
 
     # *** WARNING ! ***