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-rw-r--r--toolchain/external-toolchain/ext-tool.mk207
1 files changed, 158 insertions, 49 deletions
diff --git a/toolchain/external-toolchain/ext-tool.mk b/toolchain/external-toolchain/ext-tool.mk
index b904775f4..d441a9252 100644
--- a/toolchain/external-toolchain/ext-tool.mk
+++ b/toolchain/external-toolchain/ext-tool.mk
@@ -1,24 +1,52 @@
#
-# copy_toolchain_lib_root
+# This file implements the support for external toolchains, i.e
+# toolchains that have not been produced by Buildroot itself and that
+# are already available on the system on which Buildroot runs.
#
-# $1: source
-# $2: destination
-# $3: strip (y|n) default is to strip
+# The basic principle is the following
+#
+# 1. Perform some checks on the conformity between the toolchain
+# configuration described in the Buildroot menuconfig system, and the
+# real configuration of the external toolchain. This is for example
+# important to make sure that the Buildroot configuration system
+# knows whether the toolchain supports RPC, IPv6, locales, large
+# files, etc. Unfortunately, these things cannot be detected
+# automatically, since the value of these options (such as
+# BR2_INET_RPC) are needed at configuration time because these
+# options are used as dependencies for other options. And at
+# configuration time, we are not able to retrieve the external
+# toolchain configuration.
+#
+# 2. Copy the libraries needed at runtime to the target directory,
+# $(TARGET_DIR). Obviously, things such as the C library, the dynamic
+# loader and a few other utility libraries are needed if dynamic
+# applications are to be executed on the target system.
+#
+# 3. Copy the libraries and headers to the staging directory. This
+# will allow all further calls to gcc to be made using --sysroot
+# $(STAGING_DIR), which greatly simplifies the compilation of the
+# packages when using external toolchains. So in the end, only the
+# cross-compiler binaries remains external, all libraries and headers
+# are imported into the Buildroot tree.
+
+#
+# Copy a toolchain library and its symbolic links from the sysroot
+# directory to the target directory. Also optionaly strips the
+# library.
+#
+# $1: sysroot directory
+# $2: library name
+# $3: destination directory
+# $4: strip (y|n), default is to strip
#
copy_toolchain_lib_root = \
- LIB="$(strip $1)"; \
- DST="$(strip $2)"; \
- STRIP="$(strip $3)"; \
- \
- LIB_DIR=`$(TARGET_CC) -print-file-name=$${LIB} | sed -e "s,$${LIB}\$$,,"`; \
- \
- if test -z "$${LIB_DIR}"; then \
- echo "copy_toolchain_lib_root: lib=$${LIB} not found"; \
- exit -1; \
- fi; \
+ SYSROOT_DIR="$(strip $1)"; \
+ LIB="$(strip $2)"; \
+ DST="$(strip $3)"; \
+ STRIP="$(strip $4)"; \
\
- LIB="$(strip $1)"; \
- for FILE in `find $${LIB_DIR} -maxdepth 1 -type l -name "$${LIB}*"`; do \
+ LIB_DIR="$${SYSROOT_DIR}/lib" ; \
+ for FILE in `find $${LIB_DIR} -maxdepth 1 -name "$${LIB}.*"`; do \
LIB=`basename $${FILE}`; \
while test \! -z "$${LIB}"; do \
rm -fr $(TARGET_DIR)$${DST}/$${LIB}; \
@@ -43,44 +71,62 @@ copy_toolchain_lib_root = \
\
echo -n
+#
+# Copy the full external toolchain sysroot directory to the staging
+# dir
+#
+# $1: sysroot directory
+#
copy_toolchain_sysroot = \
- SYSROOT_DIR=`$(TARGET_CC) -v 2>&1 | grep ^Configured | tr " " "\n" | grep -- "--with-sysroot" | cut -f2 -d=`; \
- if [ -n "$${SYSROOT_DIR}" ]; then cp -a $${SYSROOT_DIR}/* $(STAGING_DIR)/ ; \
- find $(STAGING_DIR) -type d | xargs chmod 755; fi
+ SYSROOT_DIR="$(strip $1)"; \
+ cp -a $${SYSROOT_DIR}/* $(STAGING_DIR)/ ; \
+ find $(STAGING_DIR) -type d | xargs chmod 755
-ifeq ($(BR2_TOOLCHAIN_EXTERNAL_UCLIBC),y)
-EXTERNAL_LIBC=libc.so.0
-EXTERNAL_LIBS=ld-uClibc.so.0 libcrypt.so.0 libdl.so.0 libgcc_s.so libm.so.0 libnsl.so.0 libpthread.so.0 libresolv.so.0 librt.so.0 libutil.so.0
-else
-EXTERNAL_LIBC=libc.so.6
-EXTERNAL_LIBS=ld-linux.so.3 libcrypt.so.1 libdl.so.2 libgcc_s.so.1 libm.so.6 libnsl.so.1 libpthread.so.0 libresolv.so.2 librt.so.1 libutil.so.1 libnss_files.so.2
-endif
-
-check_clibrary = \
- if ! test -f `$(TARGET_CC) -print-file-name=$(EXTERNAL_LIBC)` ; then \
- echo "Incorrect selection of the C library"; \
- exit -1; \
- fi
-
-# 1: Buildroot option name
-# 2: message
+#
+# Check the availability of a particular glibc feature. We assume that
+# all Buildroot toolchain options are supported by glibc, so we just
+# check that they are enabled.
+#
+# $1: Buildroot option name
+# $2: feature description
+#
check_glibc_feature = \
if [ x$($(1)) != x"y" ] ; then \
echo "$(2) available in C library, please enable $(1)" ; \
exit 1 ; \
fi
+#
+# Check the correctness of a glibc external toolchain configuration.
+# 1. Check that the C library selected in Buildroot matches the one
+# of the external toolchain
+# 2. Check that all the C library-related features are enabled in the
+# config, since glibc always supports all of them
+#
+# $1: sysroot directory
+#
check_glibc = \
+ SYSROOT_DIR="$(strip $1)"; \
+ if ! test -f $${SYSROOT_DIR}/lib/ld-linux.so.* ; then \
+ echo "Incorrect selection of the C library"; \
+ exit -1; \
+ fi; \
$(call check_glibc_feature,BR2_LARGEFILE,Large file support) ;\
$(call check_glibc_feature,BR2_INET_IPV6,IPv6 support) ;\
$(call check_glibc_feature,BR2_INET_RPC,RPC support) ;\
$(call check_glibc_feature,BR2_ENABLE_LOCALE,Locale support) ;\
$(call check_glibc_feature,BR2_USE_WCHAR,Wide char support)
-# 1: uClibc macro name
-# 2: Buildroot option name
-# 3: uClibc config file
-# 4: message
+#
+# Check the conformity of Buildroot configuration with regard to the
+# uClibc configuration of the external toolchain, for a particular
+# feature.
+#
+# $1: uClibc macro name
+# $2: Buildroot option name
+# $3: uClibc config file
+# $4: feature description
+#
check_uclibc_feature = \
IS_IN_LIBC=`grep -q "\#define $(1) 1" $(3) && echo y` ; \
if [ x$($(2)) != x"y" -a x$${IS_IN_LIBC} == x"y" ] ; then \
@@ -92,8 +138,22 @@ check_uclibc_feature = \
exit 1 ; \
fi
+#
+# Check the correctness of a uclibc external toolchain configuration
+# 1. Check that the C library selected in Buildroot matches the one
+# of the external toolchain
+# 2. Check that the features enabled in the Buildroot configuration
+# match the features available in the uClibc of the external
+# toolchain
+#
+# $1: sysroot directory
+#
check_uclibc = \
- SYSROOT_DIR=`$(TARGET_CC) -v 2>&1 | grep ^Configured | tr " " "\n" | grep -- "--with-sysroot" | cut -f2 -d=`; \
+ SYSROOT_DIR="$(strip $1)"; \
+ if ! test -f $${SYSROOT_DIR}/lib/ld-uClibc.so.* ; then \
+ echo "Incorrect selection of the C library"; \
+ exit -1; \
+ fi; \
UCLIBC_CONFIG_FILE=$${SYSROOT_DIR}/usr/include/bits/uClibc_config.h ; \
$(call check_uclibc_feature,__UCLIBC_HAS_LFS__,BR2_LARGEFILE,$${UCLIBC_CONFIG_FILE},Large file support) ;\
$(call check_uclibc_feature,__UCLIBC_HAS_IPV6__,BR2_INET_IPV6,$${UCLIBC_CONFIG_FILE},IPv6 support) ;\
@@ -101,21 +161,70 @@ check_uclibc = \
$(call check_uclibc_feature,__UCLIBC_HAS_LOCALE__,BR2_ENABLE_LOCALE,$${UCLIBC_CONFIG_FILE},Locale support) ;\
$(call check_uclibc_feature,__UCLIBC_HAS_WCHAR__,BR2_USE_WCHAR,$${UCLIBC_CONFIG_FILE},Wide char support) ;\
-uclibc: dependencies $(TARGET_DIR)/lib/$(EXTERNAL_LIBC)
+#
+# Check that the Buildroot configuration of the ABI matches the
+# configuration of the external toolchain.
+#
+check_arm_abi = \
+ EXT_TOOLCHAIN_TARGET=$(shell LANG=C $(TARGET_CC) -v 2>&1 | grep ^Target | cut -f2 -d ' ') ; \
+ if echo $${EXT_TOOLCHAIN_TARGET} | grep -q 'eabi$$' ; then \
+ EXT_TOOLCHAIN_ABI="eabi" ; \
+ else \
+ EXT_TOOLCHAIN_ABI="oabi" ; \
+ fi ; \
+ if [ x$(BR2_ARM_OABI) == x"y" -a $${EXT_TOOLCHAIN_ABI} == "eabi" ] ; then \
+ echo "Incorrect ABI setting" ; \
+ exit 1 ; \
+ fi ; \
+ if [ x$(BR2_ARM_EABI) == x"y" -a $${EXT_TOOLCHAIN_ABI} == "oabi" ] ; then \
+ echo "Incorrect ABI setting" ; \
+ exit 1 ; \
+ fi ; \
+
+#
+# Check that the cross-compiler given in the configuration exists
+#
+check_cross_compiler_exists = \
+ if ! test -x $(TARGET_CC) ; then \
+ echo "Cannot find cross-compiler $(TARGET_CC)" ; \
+ exit 1 ; \
+ fi ; \
+
+uclibc: dependencies $(STAMP_DIR)/ext-toolchain-installed
-$(TARGET_DIR)/lib/$(EXTERNAL_LIBC):
+EXTERNAL_LIBS=libc.so libcrypt.so libdl.so libgcc_s.so libm.so libnsl.so libpthread.so libresolv.so librt.so libutil.so
+ifeq ($(BR2_TOOLCHAIN_EXTERNAL_UCLIBC),y)
+EXTERNAL_LIBS+=ld-uClibc.so
+else
+EXTERNAL_LIBS+=ld-linux.so libnss_files.so
+endif
+
+ifeq ($(BR2_INSTALL_LIBSTDCPP),y)
+EXTERNAL_LIBS+=libstdc++.so
+endif
+
+SYSROOT_DIR=$(shell LANG=C $(TARGET_CC) -v 2>&1 | grep ^Configured | tr " " "\n" | grep -- "--with-sysroot" | cut -f2 -d=)
+
+$(STAMP_DIR)/ext-toolchain-installed:
@echo "Checking external toolchain settings"
- @$(call check_clibrary)
+ $(Q)$(call check_cross_compiler_exists)
+ifeq ($(strip $(SYSROOT_DIR)),)
+ @echo "External toolchain doesn't support --sysroot. Cannot use."
+ exit 1
+endif
+ifeq ($(BR2_arm),y)
+ $(Q)$(call check_arm_abi)
+endif
ifeq ($(BR2_TOOLCHAIN_EXTERNAL_UCLIBC),y)
- @$(call check_uclibc)
+ $(Q)$(call check_uclibc,$(SYSROOT_DIR))
else
- @$(call check_glibc)
+ $(Q)$(call check_glibc,$(SYSROOT_DIR))
endif
mkdir -p $(TARGET_DIR)/lib
@echo "Copy external toolchain libraries to target..."
- @$(call copy_toolchain_lib_root, $(EXTERNAL_LIBC), /lib, $(BR2_TOOLCHAIN_EXTERNAL_STRIP))
- @for libs in $(EXTERNAL_LIBS); do \
- $(call copy_toolchain_lib_root, $$libs, /lib, $(BR2_TOOLCHAIN_EXTERNAL_STRIP)); \
+ $(Q)for libs in $(EXTERNAL_LIBS); do \
+ $(call copy_toolchain_lib_root,$(SYSROOT_DIR),$$libs,/lib,$(BR2_TOOLCHAIN_EXTERNAL_STRIP)); \
done
@echo "Copy external toolchain sysroot to staging..."
- @$(call copy_toolchain_sysroot)
+ $(Q)$(call copy_toolchain_sysroot,$(SYSROOT_DIR))
+ @touch $@