From: Thomas De Schampheleire <patrickdepinguin@gmail.com>
To: buildroot@busybox.net
Subject: [Buildroot] [PATCHv2 1/1] system: update lib64/32 symlink creation for mips64n32 and gcc >= 5.1.0
Date: Mon, 23 Dec 2019 15:47:55 +0100 [thread overview]
Message-ID: <20191223144756.28247-1-patrickdepinguin@gmail.com> (raw)
From: Thomas De Schampheleire <thomas.de_schampheleire@nokia.com>
In gcc 5.1.0, a change was introduced which causes internal search paths
inside the sysroot to be relative to 'lib64' rather than 'lib'. See [1] [2]
and [3].
For example for dtc:
LD convert-dtsv0
/opt/buildroot/output/host/opt/ext-toolchain/bin/../lib/gcc/mips64-octeon-linux-gnu/7.3.0/../../../../mips64-octeon-linux-gnu/bin/ld: cannot find crt1.o: No such file or directory
/opt/buildroot/output/host/opt/ext-toolchain/bin/../lib/gcc/mips64-octeon-linux-gnu/7.3.0/../../../../mips64-octeon-linux-gnu/bin/ld: cannot find crti.o: No such file or directory
collect2: error: ld returned 1 exit status
make[1]: *** [Makefile:236: convert-dtsv0] Error 1
make[1]: *** Waiting for unfinished jobs....
make[1]: Leaving directory '/opt/buildroot/output/build/dtc-1.4.7'
make: *** [package/pkg-generic.mk:241: /opt/buildroot/output/build/dtc-1.4.7/.stamp_built] Error 2
In this case, crt1.o was searched for in following locations:
16073 access("/opt/buildroot/output/host/opt/ext-toolchain/bin/../lib/gcc/mips64-octeon-linux-gnu/7.3.0/n32/octeon3/crt1.o", R_OK) = -1 ENOENT (No such file or directory)
16073 access("/opt/buildroot/output/host/opt/ext-toolchain/bin/../lib/gcc/n32/octeon3/crt1.o", R_OK) = -1 ENOENT (No such file or directory)
16073 access("/opt/buildroot/output/host/opt/ext-toolchain/bin/../lib/gcc/mips64-octeon-linux-gnu/7.3.0/../../../../mips64-octeon-linux-gnu/lib/mips64-octeon-linux-gnu/7.3.0/n32/octeon3/crt1.o", R_OK) = -1 ENOENT (No such file or directory)
16073 access("/opt/buildroot/output/host/opt/ext-toolchain/bin/../lib/gcc/mips64-octeon-linux-gnu/7.3.0/../../../../mips64-octeon-linux-gnu/lib/../lib32-fp/crt1.o", R_OK) = -1 ENOENT (No such file or directory)
16073 access("/opt/buildroot/output/host/mips64-buildroot-linux-gnu/sysroot/lib64/mips64-octeon-linux-gnu/7.3.0/n32/octeon3/crt1.o", R_OK) = -1 ENOENT (No such file or directory)
16073 access("/opt/buildroot/output/host/mips64-buildroot-linux-gnu/sysroot/lib64/../lib32-fp/crt1.o", R_OK) = -1 ENOENT (No such file or directory)
16073 access("/opt/buildroot/output/host/mips64-buildroot-linux-gnu/sysroot/usr/lib64/mips64-octeon-linux-gnu/7.3.0/n32/octeon3/crt1.o", R_OK) = -1 ENOENT (No such file or directory)
16073 access("/opt/buildroot/output/host/mips64-buildroot-linux-gnu/sysroot/usr/lib64/../lib32-fp/crt1.o", R_OK) = -1 ENOENT (No such file or directory)
16073 access("/opt/buildroot/output/host/opt/ext-toolchain/bin/../lib/gcc/mips64-octeon-linux-gnu/7.3.0/crt1.o", R_OK) = -1 ENOENT (No such file or directory)
16073 access("/opt/buildroot/output/host/opt/ext-toolchain/bin/../lib/gcc/crt1.o", R_OK) = -1 ENOENT (No such file or directory)
16073 access("/opt/buildroot/output/host/opt/ext-toolchain/bin/../lib/gcc/mips64-octeon-linux-gnu/7.3.0/../../../../mips64-octeon-linux-gnu/lib/mips64-octeon-linux-gnu/7.3.0/crt1.o", R_OK) = -1 ENOENT (No such file or directory)
16073 access("/opt/buildroot/output/host/opt/ext-toolchain/bin/../lib/gcc/mips64-octeon-linux-gnu/7.3.0/../../../../mips64-octeon-linux-gnu/lib/crt1.o", R_OK) = -1 ENOENT (No such file or directory)
16073 access("/opt/buildroot/output/host/mips64-buildroot-linux-gnu/sysroot/lib64/mips64-octeon-linux-gnu/7.3.0/crt1.o", R_OK) = -1 ENOENT (No such file or directory)
16073 access("/opt/buildroot/output/host/mips64-buildroot-linux-gnu/sysroot/lib64/crt1.o", R_OK) = -1 ENOENT (No such file or directory)
16073 access("/opt/buildroot/output/host/mips64-buildroot-linux-gnu/sysroot/usr/lib64/mips64-octeon-linux-gnu/7.3.0/crt1.o", R_OK) = -1 ENOENT (No such file or directory)
16073 access("/opt/buildroot/output/host/mips64-buildroot-linux-gnu/sysroot/usr/lib64/crt1.o", R_OK) = -1 ENOENT (No such file or directory)
As can be seen above, all attempted paths contain 'lib64' as base,
instead of 'lib' or 'lib32', e.g.
.../sysroot/lib64/../lib32-fp/crt1.o
.../sysroot/lib64/crt1.o
This problem was detected on a gcc 7.x toolchain provided by Marvell as part
of their Octeon SDK. For this toolchain, here are the values of the paths
as detected by the Buildroot toolchain logic, for two different Octeon
processors:
- octeon2 (soft-float) (-mabi=n32 -march=octeon2):
SYSROOT_DIR=/opt/buildroot/output/host/opt/ext-toolchain/mips64-octeon-linux-gnu/sys-root/;
ARCH_SYSROOT_DIR=/opt/buildroot/output/host/opt/ext-toolchain/mips64-octeon-linux-gnu/sys-root/;
ARCH_SUBDIR=;
ARCH_LIB_DIR=lib32/octeon2;
SUPPORT_LIB_DIR=/opt/buildroot/output/host/opt/ext-toolchain/mips64-octeon-linux-gnu/lib32/octeon2/
- octeon3 (hard-float) (-mabi=n32 -march=octeon3):
SYSROOT_DIR=/opt/buildroot/output/host/opt/ext-toolchain/mips64-octeon-linux-gnu/sys-root/;
ARCH_SYSROOT_DIR=/opt/buildroot/output/host/opt/ext-toolchain/mips64-octeon-linux-gnu/sys-root/;
ARCH_SUBDIR=;
ARCH_LIB_DIR=lib32-fp;
SUPPORT_LIB_DIR=/opt/buildroot/output/host/opt/ext-toolchain/mips64-octeon-linux-gnu/lib32-fp/
For both cases (MIPS64n32) Buildroot created a symlink 'lib32->lib', from
SYSTEM_LIB_SYMLINK in system/system.mk. Additionally, the function
create_lib_symlinks in
toolchain/toolchain-external/pkg-toolchain-external.mk will use ARCH_LIB_DIR
and create an additional link $(ARCH_LIB_DIR)->lib.
For the Octeon3 case this thus results in the following symlinks (where the
'lib32' one is normally not needed):
lib32 -> lib/
lib32-fp -> lib/
Since the toolchain is searching based on a 'lib64' component, it will fail
to find its internal paths.
To solve the problem, we need to create an additional symlink 'lib64':
lib64 -> lib/
[1] https://github.com/gcc-mirror/gcc/commit/257ccd463a4f25495b252a3bdf989d057c54678d
[2] https://gcc.gnu.org/ml/gcc-patches/2014-10/msg03377.html
[3] https://gcc.gnu.org/ml/gcc-patches/2014-11/msg00539.html
Signed-off-by: Thomas De Schampheleire <thomas.de_schampheleire@nokia.com>
---
system/system.mk | 13 +++++++++++--
1 file changed, 11 insertions(+), 2 deletions(-)
v2:
- Extend commit msg with more details (ThomasP)
diff --git a/system/system.mk b/system/system.mk
index 8db87cb129..8fe2c138b0 100644
--- a/system/system.mk
+++ b/system/system.mk
@@ -56,9 +56,18 @@ define SYSTEM_RSYNC
endef
# Make a symlink lib32->lib or lib64->lib as appropriate.
-# MIPS64/n32 requires lib32 even though it's a 64-bit arch.
+# MIPS64/n32 requires lib32 even though it's a 64-bit arch. However, since gcc
+# 5.1.0 internal compiler paths in sysroot are relative to lib64, so we must
+# create both.
# $(1): base dir (either staging or target)
-ifeq ($(BR2_ARCH_IS_64)$(BR2_MIPS_NABI32),y)
+ifeq ($(BR2_MIPS_NABI32),y)
+define SYSTEM_LIB_SYMLINK
+ ln -snf lib $(1)/lib64
+ ln -snf lib $(1)/usr/lib64
+ ln -snf lib $(1)/lib32
+ ln -snf lib $(1)/usr/lib32
+endef
+else ifeq ($(BR2_ARCH_IS_64),y)
define SYSTEM_LIB_SYMLINK
ln -snf lib $(1)/lib64
ln -snf lib $(1)/usr/lib64
--
2.24.1
next reply other threads:[~2019-12-23 14:47 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-23 14:47 Thomas De Schampheleire [this message]
2020-02-04 22:12 ` [Buildroot] [PATCHv2 1/1] system: update lib64/32 symlink creation for mips64n32 and gcc >= 5.1.0 Thomas Petazzoni
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20191223144756.28247-1-patrickdepinguin@gmail.com \
--to=patrickdepinguin@gmail.com \
--cc=buildroot@busybox.net \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.