use icecc for cross-compiling

Multiple things are needed to make this possible:
 - the wrapper dir must be first in $PATH to ensure that any available
   wrapper is used.
 - when gcc-first and gcc are done building, then a new icecc environment
   must be created.
 - use icerun to limit parallelization when xgcc/xg++ is used to build the
   internal libraries

Signed-off-by: Michael Olbrich <m.olbrich@pengutronix.de>

3 files changed, 70 insertions, 0 deletions

diff --git a/scripts/icecc-create-env-wrapper b/scripts/icecc-create-env-wrapper
new file mode 100755
index 0000000..31581c9
--- /dev/null
+++ b/scripts/icecc-create-env-wrapper
@@ -0,0 +1,23 @@
+#!/bin/bash
+
+if grep -q -- --compression "${PTXDIST_ICECC_CREATE_ENV_REAL}"; then
+	args=( --compression none )
+fi
+
+"${PTXDIST_ICECC_CREATE_ENV_REAL}" "${@}" "${args[@]}" || exit
+
+ptxd_get_path *.tar*
+env="${ptxd_reply}"
+mkdir tmp
+cd tmp
+tar xf "../${env}"
+
+find -type f | xargs strip
+
+tar -ch --numeric-owner -zvf "../${env//.*}.tar.gz" *
+
+cd ..
+rm -rf tmp
+if [ "${env}" != "${env//.*}.tar.gz" ]; then
+	rm "${env}"
+fi
diff --git a/scripts/lib/ptxd_make_compiler.sh b/scripts/lib/ptxd_make_compiler.sh
new file mode 100644
index 0000000..baf6f9a
--- /dev/null
+++ b/scripts/lib/ptxd_make_compiler.sh
@@ -0,0 +1,28 @@
+#!/bin/bash
+#
+# Copyright (C) 2020 by Michael Olbrich <m.olbrich@pengutronix.de>
+#
+# For further information about the PTXdist project and license conditions
+# see the README file.
+#
+
+#
+# helper to allow late wrapper / icecc setup
+#
+ptxd_make_setup_target_compiler() {
+    local wrapper_dir sysroot_host
+    local toolchain compiler_prefix
+
+    sysroot_host="$(ptxd_get_ptxconf PTXCONF_SYSROOT_HOST)"
+    wrapper_dir="${sysroot_host}/lib/wrapper"
+
+    toolchain="${1}"
+    compiler_prefix="$(ptxd_get_ptxconf PTXCONF_COMPILER_PREFIX)"
+
+    ptxd_lib_setup_target_wrapper &&
+    PTXDIST_ICECC_CREATE_ENV_REAL="${PTXDIST_ICECC_CREATE_ENV}" \
+    PTXDIST_ICECC_CREATE_ENV="${PTXDIST_WORKSPACE}/scripts/icecc-create-env-wrapper" \
+    ptxd_lib_setup_target_icecc
+}
+export -f ptxd_make_setup_target_compiler
+
diff --git a/scripts/lib/ptxd_make_env_init.sh b/scripts/lib/ptxd_make_env_init.sh
new file mode 100644
index 0000000..39b1642
--- /dev/null
+++ b/scripts/lib/ptxd_make_env_init.sh
@@ -0,0 +1,19 @@
+#!/bin/bash
+#
+# Copyright (C) 2020 by Michael Olbrich <m.olbrich@pengutronix.de>
+#
+# For further information about the PTXdist project and license conditions
+# see the README file.
+#
+
+#
+# The search paths added with these variables are needed in a BSP because
+# there are two sysroots: The one from the toolchain and the BSP. This is
+# not the case when building a toolchain, so they are not necessary here.
+#
+ptxd_init_cross_env_toolchain() {
+    unset PTXDIST_CROSS_CPPFLAGS
+    unset PTXDIST_CROSS_LDFLAGS
+}
+
+ptxd_init_cross_env_toolchain