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Revert "toolchain/toolchain-buildroot: enable uclibc for riscv64"

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This reverts commit bd9810e176. Indeed,
while uClibc-ng has support for RISC-V 64-bit, this support lacks the
__riscv_flush_icache() function call, which is used by some GCC
builtins used for example in libffi.

Due to this missing __riscv_flush_icache(), anything that links
against libffi fails to build:

/home/test/autobuild/run/instance-0/output-1/host/bin/riscv64-buildroot-linux-uclibc-gcc  -o gobject/gobject-query gobject/gobject-query.p/gobject-query.c.o -Wl,--as-needed -Wl,--no-undefined -Wl,-O1 -Wl,--start-group glib/libglib-2.0.so.0.6400.4 gobject/libgobject-2.0.so.0.6400.4 -Wl,--end-group -pthread '-Wl,-rpath,$ORIGIN/../glib:$ORIGIN/' -Wl,-rpath-link,/home/test/autobuild/run/instance-0/output-1/build/libglib2-2.64.4/build/glib -Wl,-rpath-link,/home/test/autobuild/run/instance-0/output-1/build/libglib2-2.64.4/build/gobject
/home/test/autobuild/run/instance-0/output-1/host/lib/gcc/riscv64-buildroot-linux-uclibc/9.3.0/../../../../riscv64-buildroot-linux-uclibc/bin/ld: /home/test/autobuild/run/instance-0/output-1/host/riscv64-buildroot-linux-uclibc/sysroot/usr/lib64/libffi.so.7: undefined reference to `__riscv_flush_icache'
collect2: error: ld returned 1 exit status

Note that this commit means that
support/config-fragments/autobuild/br-riscv64-full-internal.config
will be back to using glibc as the C library, but that is OK, until
uClibc-ng is fixed to implemented __riscv_flush_icache().

This uClibc-ng issue has been reported upstream at
https://mailman.uclibc-ng.org/pipermail/devel/2020-August/002022.html.

Fixes:

  http://autobuild.buildroot.net/results/ec1185ad1fd8863a3990143a0af2ace987761a27/

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
This commit is contained in:
Thomas Petazzoni 2020-08-15 16:10:38 +02:00 committed by Yann E. MORIN
parent 63bc5799bd
commit e7d631c0df
2 changed files with 6 additions and 8 deletions
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1
package/uclibc/Config.in
View File

@ -101,7 +101,6 @@ config BR2_UCLIBC_TARGET_ARCH
default "mips" if BR2_mips || BR2_mipsel || BR2_mips64 || BR2_mips64el
default "or1k" if BR2_or1k
default "powerpc" if BR2_powerpc
default "riscv64" if BR2_RISCV_64
default "sh" if BR2_sh
default "sparc" if BR2_sparc
default "xtensa" if BR2_xtensa

13
toolchain/toolchain-buildroot/Config.in
View File

@ -27,13 +27,12 @@ choice
config BR2_TOOLCHAIN_BUILDROOT_UCLIBC
bool "uClibc-ng"
depends on BR2_aarch64 || BR2_aarch64_be || BR2_arcle || BR2_arceb || \
BR2_arm || BR2_armeb || \
BR2_i386 || BR2_m68k || BR2_microblaze || \
BR2_mips || BR2_mipsel || BR2_mips64 || BR2_mips64el || \
BR2_or1k || BR2_powerpc || BR2_RISCV_64 || \
BR2_sh2a || BR2_sh4 || BR2_sh4eb || BR2_sparc || \
BR2_xtensa || BR2_x86_64
depends on BR2_aarch64 || BR2_aarch64_be || BR2_arcle || BR2_arceb || \
BR2_arm || BR2_armeb || \
BR2_i386 || BR2_m68k || BR2_microblaze || \
BR2_mips || BR2_mipsel || BR2_mips64 || BR2_mips64el || \
BR2_or1k || BR2_powerpc || BR2_sh2a || BR2_sh4 || \
BR2_sh4eb || BR2_sparc || BR2_xtensa || BR2_x86_64
select BR2_TOOLCHAIN_USES_UCLIBC
help
This option selects uClibc-ng as the C library for the