From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thomas De Schampheleire Date: Fri, 12 Feb 2016 20:20:25 +0100 Subject: [Buildroot] [PATCH 4/5] toolchain-external: align library locations in target and staging dir In-Reply-To: <1455304826-10557-1-git-send-email-patrickdepinguin@gmail.com> References: <1455304826-10557-1-git-send-email-patrickdepinguin@gmail.com> Message-ID: <1455304826-10557-5-git-send-email-patrickdepinguin@gmail.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: buildroot@busybox.net From: Thomas De Schampheleire The toolchain-external logic is roughly: - populate the staging dir by rsyncing the entire ${ARCH_LIB_DIR} and usr/${ARCH_LIB_DIR} from sysroot. - populate the target dir by explictly copying some libraries from sysroot into target/lib and some other libraries in target/usr/lib, the split being hardcoded into buildroot regardless of the location in the sysroot. This means that a library libfoo could be located in: staging/lib/libfoo.so target/usr/lib/libfoo.so When debugging an application that links against this library, gdb will fruitlessly search for 'usr/lib/libfoo.so' in staging, and then suggest to use 'set solib-search-path' which is a hack, really. To solve the problem, we need to make sure that libraries from the toolchain are installed in the same relative location in staging and target. Achieve this by: - replacing the convoluted search for libraries using for+find in sysroot with a simple find in staging. - determining DESTDIR for each library individually based on the location in staging. - treating LIB_EXTERNAL_LIBS and USR_LIB_EXTERNAL_LIBS equivalently These changes also allow for the removal of most arguments to copy_toolchain_lib_root in the method itself and their callers. Test procedure: - set configuration for a given toolchain - make clean toolchain - find output/target | sort > /tmp/out-before - apply patch - make clean toolchain - find output/target | sort > /tmp/out-after - diff -u /tmp/out-before /tmp/out-after The only changes should be some libraries moving from lib to usr/lib or vice versa. Notable examples being libstdc++ and libatomic. Signed-off-by: Thomas De Schampheleire --- package/glibc/glibc.mk | 2 +- toolchain/helpers.mk | 57 ++-------------------- toolchain/toolchain-external/toolchain-external.mk | 39 ++++----------- 3 files changed, 15 insertions(+), 83 deletions(-) Test notes: I have executed the mentioned test procedure for all external toolchains listed on http://autobuild.buildroot.org/toolchains/configs/, for the x86 ARMv7a Thumb2 EABIhf Linaro toolchain, and for an internal glibc toolchain. An x86_64 qemu image was booted, both with internal and external toolchain. diff --git a/package/glibc/glibc.mk b/package/glibc/glibc.mk index e60575f..bcec47f 100644 --- a/package/glibc/glibc.mk +++ b/package/glibc/glibc.mk @@ -117,7 +117,7 @@ endif define GLIBC_INSTALL_TARGET_CMDS for libs in $(GLIBC_LIBS_LIB); do \ - $(call copy_toolchain_lib_root,$(STAGING_DIR)/,,lib,$$libs,/lib) ; \ + $(call copy_toolchain_lib_root,$$libs) ; \ done endef diff --git a/toolchain/helpers.mk b/toolchain/helpers.mk index ee878e8..d5dc16f 100644 --- a/toolchain/helpers.mk +++ b/toolchain/helpers.mk @@ -6,62 +6,15 @@ # toolchain logic, and the glibc package, so care must be taken when # changing this function. # -# Most toolchains (CodeSourcery ones) have their libraries either in -# /lib or /usr/lib relative to their ARCH_SYSROOT_DIR, so we search -# libraries in: -# -# $${ARCH_LIB_DIR} -# usr/$${ARCH_LIB_DIR} -# -# Buildroot toolchains, however, have basic libraries in /lib, and -# libstdc++/libgcc_s in /usr//lib(64), so we also need to -# search libraries in: -# -# usr/$(TOOLCHAIN_EXTERNAL_PREFIX)/$${ARCH_LIB_DIR} -# -# Linaro toolchains have most libraries in lib//, so we -# need to search libraries in: -# -# $${ARCH_LIB_DIR}/$(TOOLCHAIN_EXTERNAL_PREFIX) -# -# And recent Linaro toolchains have the GCC support libraries -# (libstdc++, libgcc_s, etc.) into a separate directory, outside of -# the sysroot, that we called the "SUPPORT_LIB_DIR", into which we -# need to search as well. -# -# Thanks to ARCH_LIB_DIR we also take into account toolchains that -# have the libraries in lib64 and usr/lib64. -# -# Please be very careful to check the major toolchain sources: -# Buildroot, Crosstool-NG, CodeSourcery and Linaro before doing any -# modification on the below logic. -# -# $1: arch specific sysroot directory -# $2: support libraries directory (can be empty) -# $3: library directory ('lib' or 'lib64') from which libraries must be copied -# $4: library name -# $5: destination directory of the libary, relative to $(TARGET_DIR) +# $1: library name # copy_toolchain_lib_root = \ - ARCH_SYSROOT_DIR="$(strip $1)"; \ - SUPPORT_LIB_DIR="$(strip $2)" ; \ - ARCH_LIB_DIR="$(strip $3)" ; \ - LIB="$(strip $4)"; \ - DESTDIR="$(strip $5)" ; \ + LIB="$(strip $1)"; \ \ - for dir in \ - $${ARCH_SYSROOT_DIR}/$${ARCH_LIB_DIR}/$(TOOLCHAIN_EXTERNAL_PREFIX) \ - $${ARCH_SYSROOT_DIR}/usr/$(TOOLCHAIN_EXTERNAL_PREFIX)/$${ARCH_LIB_DIR} \ - $${ARCH_SYSROOT_DIR}/$${ARCH_LIB_DIR} \ - $${ARCH_SYSROOT_DIR}/usr/$${ARCH_LIB_DIR} \ - $${SUPPORT_LIB_DIR} ; do \ - LIBPATHS=`find $${dir} -maxdepth 1 -name "$${LIB}" 2>/dev/null` ; \ - if test -n "$${LIBPATHS}" ; then \ - break ; \ - fi \ - done ; \ - mkdir -p $(TARGET_DIR)/$${DESTDIR}; \ + LIBPATHS=`find $(STAGING_DIR) -follow -name "$${LIB}" 2>/dev/null` ; \ for LIBPATH in $${LIBPATHS} ; do \ + DESTDIR=`echo $${LIBPATH} | sed "s,^$(STAGING_DIR)/,," | xargs dirname` ; \ + mkdir -p $(TARGET_DIR)/$${DESTDIR}; \ while true ; do \ LIBNAME=`basename $${LIBPATH}`; \ LIBDIR=`dirname $${LIBPATH}` ; \ diff --git a/toolchain/toolchain-external/toolchain-external.mk b/toolchain/toolchain-external/toolchain-external.mk index d5445e5..a333c32 100644 --- a/toolchain/toolchain-external/toolchain-external.mk +++ b/toolchain/toolchain-external/toolchain-external.mk @@ -585,24 +585,16 @@ endef # our sysroot, and the directory will also be # considered when searching libraries for copy # to the target filesystem. +# +# Please be very careful to check the major toolchain sources: +# Buildroot, Crosstool-NG, CodeSourcery and Linaro +# before doing any modification on the below logic. define TOOLCHAIN_EXTERNAL_INSTALL_TARGET_LIBS - $(Q)ARCH_SYSROOT_DIR="$(call toolchain_find_sysroot,$(TOOLCHAIN_EXTERNAL_CC) $(TOOLCHAIN_EXTERNAL_CFLAGS))" ; \ - ARCH_LIB_DIR="$(call toolchain_find_libdir,$(TOOLCHAIN_EXTERNAL_CC) $(TOOLCHAIN_EXTERNAL_CFLAGS))" ; \ - SUPPORT_LIB_DIR="" ; \ - if test `find $${ARCH_SYSROOT_DIR} -name 'libstdc++.a' | wc -l` -eq 0 ; then \ - LIBSTDCPP_A_LOCATION=$$(LANG=C $(TOOLCHAIN_EXTERNAL_CC) $(TOOLCHAIN_EXTERNAL_CFLAGS) -print-file-name=libstdc++.a) ; \ - if [ -e "$${LIBSTDCPP_A_LOCATION}" ]; then \ - SUPPORT_LIB_DIR=`readlink -f $${LIBSTDCPP_A_LOCATION} | sed -r -e 's:libstdc\+\+\.a::'` ; \ - fi ; \ - fi ; \ - if test -z "$(BR2_STATIC_LIBS)" ; then \ + $(Q)if test -z "$(BR2_STATIC_LIBS)" ; then \ $(call MESSAGE,"Copying external toolchain libraries to target...") ; \ - for libs in $(LIB_EXTERNAL_LIBS); do \ - $(call copy_toolchain_lib_root,$${ARCH_SYSROOT_DIR},$${SUPPORT_LIB_DIR},$${ARCH_LIB_DIR},$$libs,/lib); \ - done ; \ - for libs in $(USR_LIB_EXTERNAL_LIBS); do \ - $(call copy_toolchain_lib_root,$${ARCH_SYSROOT_DIR},$${SUPPORT_LIB_DIR},$${ARCH_LIB_DIR},$$libs,/usr/lib); \ + for libs in $(LIB_EXTERNAL_LIBS) $(USR_LIB_EXTERNAL_LIBS); do \ + $(call copy_toolchain_lib_root,$$libs); \ done ; \ fi endef @@ -671,21 +663,8 @@ define TOOLCHAIN_EXTERNAL_INSTALL_SYSROOT_LIBS_BFIN_FDPIC endef define TOOLCHAIN_EXTERNAL_INSTALL_BFIN_FDPIC $(Q)$(call MESSAGE,"Install external toolchain FDPIC libraries to target...") ; \ - FDPIC_EXTERNAL_CC=$(dir $(TOOLCHAIN_EXTERNAL_CC))/../../bfin-linux-uclibc/bin/bfin-linux-uclibc-gcc ; \ - FDPIC_SYSROOT_DIR="$(call toolchain_find_sysroot,$${FDPIC_EXTERNAL_CC} $(TOOLCHAIN_EXTERNAL_CFLAGS))" ; \ - FDPIC_LIB_DIR="$(call toolchain_find_libdir,$${FDPIC_EXTERNAL_CC} $(TOOLCHAIN_EXTERNAL_CFLAGS))" ; \ - FDPIC_SUPPORT_LIB_DIR="" ; \ - if test `find $${FDPIC_SYSROOT_DIR} -name 'libstdc++.a' | wc -l` -eq 0 ; then \ - FDPIC_LIBSTDCPP_A_LOCATION=$$(LANG=C $${FDPIC_EXTERNAL_CC} $(TOOLCHAIN_EXTERNAL_CFLAGS) -print-file-name=libstdc++.a) ; \ - if [ -e "$${FDPIC_LIBSTDCPP_A_LOCATION}" ]; then \ - FDPIC_SUPPORT_LIB_DIR=`readlink -f $${FDPIC_LIBSTDCPP_A_LOCATION} | sed -r -e 's:libstdc\+\+\.a::'` ; \ - fi ; \ - fi ; \ - for libs in $(LIB_EXTERNAL_LIBS); do \ - $(call copy_toolchain_lib_root,$${FDPIC_SYSROOT_DIR},$${FDPIC_SUPPORT_LIB_DIR},$${FDPIC_LIB_DIR},$$libs,/lib); \ - done ; \ - for libs in $(USR_LIB_EXTERNAL_LIBS); do \ - $(call copy_toolchain_lib_root,$${FDPIC_SYSROOT_DIR},$${FDPIC_SUPPORT_LIB_DIR},$${FDPIC_LIB_DIR},$$libs,/usr/lib); \ + for libs in $(LIB_EXTERNAL_LIBS) $(USR_LIB_EXTERNAL_LIBS); do \ + $(call copy_toolchain_lib_root,$$libs); \ done endef endif -- 2.4.10