1 files changed, 103 insertions, 0 deletions
diff --git a/scripts/build/libc/musl.sh b/scripts/build/libc/musl.sh
new file mode 100644
index 00000000..7172cf28
--- /dev/null
+++ b/scripts/build/libc/musl.sh
@@ -0,0 +1,103 @@
+# This file adds functions to build the musl C library
+# Copyright 2013 Timo TerÃ¤s
+# Licensed under the GPL v2. See COPYING in the root of this package
+
+do_libc_get() {
+    local libc_src
+
+    libc_src="http://www.musl-libc.org/releases"
+
+    if [ "${CT_LIBC_MUSL_CUSTOM}" = "y" ]; then
+        CT_GetCustom "musl" "${CT_LIBC_VERSION}"      \
+                     "${CT_LIBC_MUSL_CUSTOM_LOCATION}"
+    else # ! custom location
+        CT_GetFile "musl-${CT_LIBC_VERSION}" "${libc_src}"
+    fi # ! custom location
+}
+
+do_libc_extract() {
+    # If using custom directory location, nothing to do.
+    if [ "${CT_LIBC_MUSL_CUSTOM}" = "y" ]; then
+        # Abort if the custom directory is not found.
+        if ! [ -d "${CT_SRC_DIR}/musl-${CT_LIBC_VERSION}" ]; then
+            CT_Abort "Directory not found: ${CT_SRC_DIR}/musl-${CT_LIBC_VERSION}"
+        fi
+
+        return 0
+    fi
+
+    CT_Extract "musl-${CT_LIBC_VERSION}"
+    CT_Patch "musl" "${CT_LIBC_VERSION}"
+}
+
+do_libc_check_config() {
+    :
+}
+
+do_libc_configure() {
+    CT_DoLog EXTRA "Configuring C library"
+    local -a extra_cflags
+
+    # From buildroot:
+    # gcc constant folding bug with weak aliases workaround
+    # See http://www.openwall.com/lists/musl/2014/05/15/1
+    if [ "${CT_CC_GCC_4_9_or_later}" = "y" ]; then
+        extra_cflags+=("-fno-toplevel-reorder")
+    fi
+
+    # NOTE: musl handles the build/host/target a little bit differently
+    # then one would expect:
+    #   build   : not used
+    #   host    : the machine building musl
+    #   target  : the machine musl runs on
+    CT_DoExecLog CFG                \
+    CFLAGS="${extra_cflags[@]}"     \
+    CROSS_COMPILE="${CT_TARGET}-"   \
+    ./configure                     \
+        --host="${CT_TARGET}"       \
+        --target="${CT_TARGET}"     \
+        --prefix="/usr"             \
+        --disable-gcc-wrapper
+}
+
+do_libc_start_files() {
+    CT_DoStep INFO "Installing C library headers"
+
+    # Simply copy files until musl has the ability to build out-of-tree
+    CT_DoLog EXTRA "Copying sources to build directory"
+    CT_DoExecLog ALL cp -av "${CT_SRC_DIR}/musl-${CT_LIBC_VERSION}" \
+                            "${CT_BUILD_DIR}/build-libc-headers"
+    cd "${CT_BUILD_DIR}/build-libc-headers"
+
+    do_libc_configure
+
+    CT_DoLog EXTRA "Installing headers"
+    CT_DoExecLog ALL make DESTDIR="${CT_SYSROOT_DIR}" install-headers
+
+    CT_DoExecLog ALL make DESTDIR="${CT_SYSROOT_DIR}" \
+        crt/crt1.o crt/crti.o crt/crtn.o
+    CT_DoExecLog ALL cp -av crt/crt*.o "${CT_SYSROOT_DIR}/usr/lib"
+    CT_DoExecLog ALL ${CT_TARGET}-gcc -nostdlib \
+        -nostartfiles -shared -x c /dev/null -o "${CT_SYSROOT_DIR}/usr/lib/libc.so"
+    CT_EndStep
+}
+
+do_libc() {
+    CT_DoStep INFO "Installing C library"
+
+    # Simply copy files until musl has the ability to build out-of-tree
+    CT_DoLog EXTRA "Copying sources to build directory"
+    CT_DoExecLog ALL cp -av "${CT_SRC_DIR}/musl-${CT_LIBC_VERSION}" \
+                            "${CT_BUILD_DIR}/build-libc"
+    cd "${CT_BUILD_DIR}/build-libc"
+
+    do_libc_configure
+
+    CT_DoLog EXTRA "Building C library"
+    CT_DoExecLog ALL make ${JOBSFLAGS}
+
+    CT_DoLog EXTRA "Installing C library"
+    CT_DoExecLog ALL make DESTDIR="${CT_SYSROOT_DIR}" install
+
+    CT_EndStep
+}