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toolchain: add option for toolchains affected by GCC PR libstdc++/64735

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exception_ptr, nested_exception, and future from libstdc++ are not
available for architectures not supporting always lock-free atomic ints
before GCC 7.

Bug report:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64735

Fix available starting from GCC 7 (not yet released):
https://gcc.gnu.org/viewcvs/gcc?view=revision&revision=244051

Signed-off-by: Jörg Krause <joerg.krause@embedded.rocks>
[Thomas:
 - directly define the value where BR2_TOOLCHAIN_HAS_GCC_BUG_64735
   rather than having additional patches touching affected architectures
   Config.in files
 - add a better comment above the Config.in option.]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
This commit is contained in:
Jörg Krause 2017-02-09 18:47:54 +01:00 committed by Thomas Petazzoni
parent e3a4c386e4
commit accba02a47
1 changed files with 12 additions and 0 deletions
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12
toolchain/toolchain-common.in
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@ -7,6 +7,18 @@ source "package/gdb/Config.in.host"
comment "Toolchain Generic Options"
# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64735
# exception_ptr, nested_exception, and future from libstdc++ are not
# available for architectures not supporting always lock-free atomic
# ints before GCC 7
config BR2_TOOLCHAIN_HAS_GCC_BUG_64735
bool
default y
depends on !BR2_nios2
depends on !BR2_ARM_CPU_ARMV4
depends on !BR2_ARM_CPU_ARMV5
depends on !BR2_sparc_v8
# https://sourceware.org/bugzilla/show_bug.cgi?id=19405
config BR2_TOOLCHAIN_HAS_BINUTILS_BUG_19405
bool