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Add --with-cpu= on 32-bit SPARC

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... if building for GLIBC 2.31+.

Signed-off-by: Alexey Neyman <stilor@att.net>
This commit is contained in:
Alexey Neyman 2020-03-03 16:37:31 -08:00
parent 2ae68d9150
commit 8606251585
2 changed files with 32 additions and 17 deletions
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8
config/libc/glibc.in
View File

@ -35,11 +35,13 @@ config GLIBC_DEP_BINUTILS
select BINUTILS_REQUIRE_2_25_or_later if GLIBC_2_26_or_later
select BINUTILS_REQUIRE_older_than_2_30 if GLIBC_older_than_2_26 && ARCH_ARM && ARCH_64
# Glibc 2.26 requires GCC4.9 or newer
# Glibc 2.29 requires GCC5+ or, for ppc64le, GCC6.2+. We only support the latest
# release on GCC6 branch, so just assume it is newer than 6.2
# Glibc 2.30 uncondtionally requires GCC 6.2+
config GLIBC_DEP_GCC
def_bool y
select GCC_REQUIRE_4_9_or_later if GLIBC_2_26_or_later
select GCC_REQUIRE_5_or_later if GLIBC_2_29_or_later
select GCC_REQUIRE_6_or_later if GLIBC_2_29_or_later && ARCH_POWERPC && ARCH_64 && ARCH_LE
select GCC_REQUIRE_6_or_later if GLIBC_2_30_or_later
@ -64,9 +66,11 @@ config GLIBC_DEP_MAKE_4_0
select MAKE_REQUIRE_4_0_or_later
select MAKE_GNUMAKE_SYMLINK # Override old host make in .build/tools/bin
config GLIBC_DEP_GCC
# Glibc 2.31 removed support for pre-v8 SPARC in 32-bit mode (64-bit mode always
# required UltraSPARC)
config GLIBC_SPARC_ALLOW_V7
def_bool y
select GCC_REQUIRE_4_9_or_later if GLIBC_2_26_or_later
depends on GLIBC_2_30_or_older
config THREADS
default "nptl"

41
scripts/build/arch/sparc.sh
View File

@ -3,21 +3,32 @@ CT_DoArchTupleValues() {
# That's the only thing to override
CT_TARGET_ARCH="sparc${target_bits_64}${CT_ARCH_SUFFIX}"
# By default, sparc64-*-linux is configured with -mcpu=v9. However,
# according to https://sourceware.org/ml/libc-alpha/2005-12/msg00027.html,
# "There is no Linux sparc64 port that runs on non-UltraSPARC-I+ ISA CPUs."
# There is a patch that would change the default to -mcpu=ultrasparc for
# sparc64-*-linux configuration: https://patchwork.ozlabs.org/patch/409424/
# but that patch has not been integrated (yet). One concern raised about
# this patch was that -mcpu=ultrasparc can suboptimally schedule instructions
# for newer SPARC CPUs. So, override to -mcpu=ultrasparc and warn the user.
if [ "${CT_KERNEL}" = "linux" -a "${CT_ARCH_64}" = "y" -a -z "${CT_ARCH_CPU}" ]; then
CT_DoLog WARN "Setting CPU to UltraSPARC-I for sparc64-linux. Set CT_ARCH_CPU if a different CPU is desired."
CT_ARCH_WITH_CPU="--with-cpu=ultrasparc"
if [ -n "${CT_ARCH_SUPPORTS_WITH_32_64}" -a -n "${CT_MULTILIB}" ]; then
CT_ARCH_WITH_CPU_32="--with-cpu-32=ultrasparc"
CT_ARCH_WITH_CPU_64="--with-cpu-64=ultrasparc"
fi
if [ "${CT_KERNEL}" = "linux" -a -z "${CT_ARCH_CPU}" ]; then
if [ "${CT_ARCH_64}" = "y" ]; then
# By default, sparc64-*-linux is configured with -mcpu=v9. However,
# according to https://sourceware.org/ml/libc-alpha/2005-12/msg00027.html,
# "There is no Linux sparc64 port that runs on non-UltraSPARC-I+ ISA CPUs."
# There is a patch that would change the default to -mcpu=ultrasparc for
# sparc64-*-linux configuration: https://patchwork.ozlabs.org/patch/409424/
# but that patch has not been integrated (yet). One concern raised about
# this patch was that -mcpu=ultrasparc can suboptimally schedule instructions
# for newer SPARC CPUs. So, override to -mcpu=ultrasparc and warn the user.
CT_DoLog WARN "Setting CPU to UltraSPARC-I for sparc64-linux. Set CT_ARCH_CPU if a different CPU is desired."
CT_ARCH_WITH_CPU="--with-cpu=ultrasparc"
if [ -n "${CT_ARCH_SUPPORTS_WITH_32_64}" -a -n "${CT_MULTILIB}" ]; then
CT_ARCH_WITH_CPU_32="--with-cpu-32=ultrasparc"
CT_ARCH_WITH_CPU_64="--with-cpu-64=ultrasparc"
fi
else
# Similarly, sparc-*-linux defaults to v7. GLIBC 2.31 started to reject
# pre-v8 configurations with 2.31, and default v8 fails a subsequent test for
# using atomics (which are presumably, only available on some v8 CPUs).
# Therefore, default to v9.
if [ -z "${CT_GLIBC_SPARC_ALLOW_V7}" ]; then
CT_DoLog WARN "Setting CPU to V9 for sparc-linux. Set CT_ARCH_CPU if a different CPU is desired."
CT_ARCH_WITH_CPU="--with-cpu=v9"
fi
fi
fi
}