mirror of
https://github.com/crosstool-ng/crosstool-ng.git
synced 2024-12-20 21:33:08 +00:00
f22be3a625
This reverts commit0841e2f820from 2011, which disabled plugin support in binutils for static toolchains, citing build system problems. This problem seems to be resolved. This also reverts part of45512b003dfrom 2017, which disabled LTO in gcc for static toolchains, citing problems on Arch Linux with loading the LTO plugin from a static binary. Signed-off-by: Chris Copeland <chris@chrisnc.net>
520 lines
17 KiB
Plaintext
520 lines
17 KiB
Plaintext
# GCC options
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## select CC_SUPPORT_CXX
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## select CC_SUPPORT_FORTRAN
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## select CC_SUPPORT_JAVA if !GCC_7_or_later && OBSOLETE
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## select CC_SUPPORT_ADA
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## select CC_SUPPORT_D
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## select CC_SUPPORT_JIT
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## select CC_SUPPORT_OBJC
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## select CC_SUPPORT_OBJCXX
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## select CC_SUPPORT_GOLANG
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# ISL 0.15 is the oldest release present in CTNG.
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# GCC7 requires ISL 0.15+
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# GCC6 requires ISL 0.14+ (it says 0.14-0.16, but accepts newer ISL as well)
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# GCC5 requires ISL 0.12+ (again, it says 0.12-0.16, but also accepts newer ISL up to 0.18;
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# fails to compile with 0.19+)
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## select ISL_REQUIRE_0_18_or_older if ISL_NEEDED && GCC_5_or_later && !GCC_6_or_later
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# GCC4.9 requires ISL 0.10..0.15
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## select ISL_REQUIRE_0_15_or_older if ISL_NEEDED && GCC_4_9_or_later && !GCC_5_or_later
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## help gcc is the full-blown GNU compiler. This is what most people will choose.
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## help
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## help gcc supports many languages, a powerful code parser, optimised binary
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## help output, and lots of other features.
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# Only enable gcc's support for plugins if binutils has it as well
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# They are useful only when doing LTO, but it does no harm enabling
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# them even without LTO.
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config CC_GCC_ENABLE_PLUGINS
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def_bool y
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depends on BINUTILS_PLUGINS
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# If binutils installs gold, enable support for gold in gcc
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config CC_GCC_GOLD
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def_bool y
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depends on BINUTILS_GOLD_INSTALLED
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config CC_GCC_HAS_LIBMPX
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def_bool y
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depends on GCC_5_or_later
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config CC_LANG_JAVA_USE_ECJ
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def_bool y
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depends on CC_LANG_JAVA
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config CC_GCC_ENABLE_CXX_FLAGS
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string "Flags to pass to --enable-cxx-flags"
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default ""
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help
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Enter here the value of the gcc's ./configure option --enable-cxx-flags.
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Leave empty if you don't know better.
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Note: just pass in the option _value_, that is only the part that goes
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after the '=' sign.
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config CC_GCC_EXTRA_LIBSTDCXX
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bool "Re-enable libstdcxx"
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default n
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depends on LIBC_AVR_LIBC
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select CC_CORE_PASS_2_NEEDED
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help
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libstdcxx is normally disabled on avr systems due to size limitations.
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Set this option to re-enable libstdcxx support.
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config CC_GCC_CORE_EXTRA_CONFIG_ARRAY
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string "Core gcc extra config"
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default ""
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depends on CC_CORE_NEEDED
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help
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Extra flags to pass onto ./configure when configuring the core gcc.
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The core gcc is a stripped down, C-only compiler needed to build
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the C library. Kinda bootstrap gcc, if you wish.
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You can enter multiple arguments here, and arguments can contain spaces
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if they are properly quoted (or escaped, but prefer quotes). Eg.:
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--with-foo="1st arg with 4 spaces" --with-bar=2nd-arg-without-space
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config CC_GCC_EXTRA_CONFIG_ARRAY
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string "gcc extra config"
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default ""
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help
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Extra flags to pass onto ./configure when configuring gcc.
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You can enter multiple arguments here, and arguments can contain spaces
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if they are properly quoted (or escaped, but prefer quotes). Eg.:
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--with-foo="1st arg with 4 spaces" --with-bar=2nd-arg-without-space
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config CC_GCC_MULTILIB_LIST
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string "List of multilib variants"
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depends on MULTILIB
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depends on ! (ARCH_RISCV && BARE_METAL)
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default "m2,m2e,m4,m4-single,m4-single-only,m2a,m2a-single" if GCC_11_or_later && ARCH_SH
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default "aprofile,rmprofile" if ARCH_ARM && ARCH_32
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help
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Architecture-specific option of expanding or restricting the list of
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the multilib variants to be built. Refer to GCC installation manual
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for the format of this option for a particular architecture.
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Leave empty to use the default list for this architecture.
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config CC_GCC_MULTILIB_GENERATOR
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string "Generator of RISC-V multilib variants"
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depends on MULTILIB
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depends on (ARCH_RISCV && BARE_METAL)
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default ""
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help
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Multilib generator for RISC-V architecture.
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For more information please refer to gcc manual
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If unsure, leave empty.
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config STATIC_TOOLCHAIN
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bool
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select CC_GCC_STATIC_LIBSTDCXX
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config CC_GCC_STATIC_LIBSTDCXX
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bool "Link libstdc++ statically into the gcc binary"
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default y
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depends on CONFIGURE_has_static_link || CANADIAN || CROSS_NATIVE
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select WANTS_STATIC_LINK if CROSS || NATIVE
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select WANTS_STATIC_LINK_CXX if CROSS || NATIVE
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help
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Newer gcc versions require some c++ libraries. So statically
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linking libstdc++ increases the likeliness that the gcc binary will
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run on machines other than the one which it was built on, without
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having to worry about distributing the matching version of libstdc++
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along with it.
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config CC_GCC_SYSTEM_ZLIB
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bool "Use system zlib"
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help
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Do not use bundled zlib, and use the zlib already available for
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the host (eg. the system library).
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If zlib is built as a companion library, selecting this option
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will use it.
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If you want to build a static toolchain, you will need to also
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install the static version of zlib for your host.
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If unsure, say 'n'.
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config CC_GCC_CONFIG_TLS
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tristate
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prompt "Configure TLS (Thread Local Storage)"
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default m
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help
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Specify that the target supports TLS (Thread Local Storage). Usually
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configure can correctly determine if TLS is supported. In cases where
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it guesses incorrectly, TLS can be explicitly enabled or disabled.
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This can happen if the assembler supports TLS but the C library does
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not, or if the assumptions made by the configure test are incorrect.
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Option | TLS use | Associated ./configure switch
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---------+--------------------+--------------------------------
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Y | forcibly used | --enable-tls
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M | auto | (none, ./configure decides)
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N | forcibly not used | --disable-tls
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If unsure, say 'M'.
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#-----------------------------------------------------------------------------
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# Optimisation features
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comment "Optimisation features"
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# Defined in config/cc/gcc.in
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# For graphite: gcc needs cloog and isl
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# In >= gcc-5.x, cloog is no longer needed, but isl is.
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config CC_GCC_USE_GRAPHITE
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bool "Enable GRAPHITE loop optimisations"
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default y
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select CLOOG_NEEDED if !GCC_5_or_later
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select ISL_NEEDED
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help
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Enable the GRAPHITE loop optimsations.
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On some systems (eg. Cygwin), CLooG and ISL (required to enable
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GRAPHITE) may not build properly (yet), so you'll have to say 'N'
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here (or help debug the issues)
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TODO: Is this still true on Cygwin?
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# The way LTO works is a bit twisted.
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# See: http://gcc.gnu.org/wiki/LinkTimeOptimization#Requirements
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# Basically:
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# - if binutils has plugins: LTO is handled by ld/gold by loading
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# the plugin when linking
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# - if binutils does not have plugins: LTO is handled by collect2
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# In any case, LTO support does not depend on plugins, but takes
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# advantage of it
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config CC_GCC_USE_LTO
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bool "Enable LTO"
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default y
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select ZLIB_NEEDED
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help
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Enable the Link Time Optimisations.
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config CC_GCC_LTO_ZSTD
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tristate
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prompt "Support LTO compression with zstd"
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default m
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depends on CC_GCC_USE_LTO
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depends on GCC_10_or_later
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select ZSTD_NEEDED
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help
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Support zstd compression for LTO object files. This will require
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libzstd to be installed when using the toolchain
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Option | ZSTD use | Associated ./configure switch
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---------+--------------------+--------------------------------
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Y | forcibly used | --with-zstd
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M | auto | (none, ./configure decides)
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N | forcibly not used | --without-zstd
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If unsure, say 'M'
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#-----------------------------------------------------------------------------
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comment "Settings for libraries running on target"
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config CC_GCC_ENABLE_DEFAULT_PIE
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bool
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prompt "Enable Position Independent Executable as default"
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default n
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depends on GCC_6_or_later && ! WINDOWS && ! ARCH_MIPS && ! ARCH_AVR && ! ARCH_PRU
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depends on !(ARCH_RISCV && BARE_METAL)
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help
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Pass --enable-default-pie to crossgcc's configure.
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This will let crossgcc compile executable as Position Independent
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Executable by default.
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config CC_GCC_ENABLE_TARGET_OPTSPACE
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bool
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prompt "Optimize gcc libs for size"
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default y
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help
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Pass --enable-target-optspace to crossgcc's configure.
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This will compile crossgcc's libs with -Os.
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config CC_GCC_LIBMUDFLAP
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bool
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prompt "Compile libmudflap"
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help
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libmudflap is a pointer-use checking tool, which can detect
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various mis-usages of pointers in C and (to some extents) C++.
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You should say 'N' here, as libmduflap generates instrumented
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code (thus it is a bit bigger and a bit slower) and requires
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re-compilation and re-link, while it exists better run-time
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alternatives (eg. DUMA, dmalloc...) that need neither re-
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compilation nor re-link.
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config CC_GCC_LIBGOMP
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bool
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prompt "Compile libgomp"
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depends on !THREADS_NONE
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help
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libgomp is "the GNU implementation of the OpenMP Application Programming
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Interface (API) for multi-platform shared-memory parallel programming in
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C/C++ and Fortran". See:
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http://gcc.gnu.org/onlinedocs/libgomp/
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GNU OpenMP support requires threading.
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The default is 'N'. Say 'Y' if you need it, and report success/failure.
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config CC_GCC_LIBSSP
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tristate
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prompt "Compile libssp"
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help
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libssp is the run-time Stack-Smashing Protection library.
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Option | SSP implementation | libssp built | Associated ./configure switch
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---------+---------------------+--------------+-------------------------------
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Y | libssp (forced) | yes | --enable-libssp
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M | libc (if available) | yes | (none, ./configure decides)
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N | libc (forced) | no | --disable-libssp
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The default is 'N'. Say 'Y' or 'M' if you need it, and report success/failure.
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config CC_GCC_LIBQUADMATH
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bool
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prompt "Compile libquadmath"
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help
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libquadmath is a library which provides quad-precision mathematical
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functions on targets supporting the __float128 datatype. See:
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http://gcc.gnu.org/onlinedocs/libquadmath/
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The default is 'N'. Say 'Y' if you need it, and report success/failure.
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config CC_GCC_LIBSANITIZER
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tristate
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prompt "Compile libsanitizer"
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depends on THREADS_NATIVE
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depends on !LIBC_UCLIBC_NG && !LIBC_MUSL # Currently lacks required headers (like netrom.h)
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depends on ARCH_SUPPORTS_LIBSANITIZER
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help
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libsanitizer is a library which provides run-time sanitising of either
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or both of:
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- memory access patterns (out-of-bonds, use-after-free)
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- racy data accesses (in multi-threaded programs)
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Option | libsanitizer | Associated ./configure switch
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---------+--------------------+--------------------------------
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Y | forcibly used | --enable-libsanitizer
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M | auto | (none, ./configure decides)
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N | forcibly not used | --disable-libsanitizer
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The default is 'N'. Say 'Y' or 'M' if you need it, and report success/failure.
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config CC_GCC_LIBMPX
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bool
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default y
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prompt "Compile libmpx"
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depends on CC_GCC_HAS_LIBMPX
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depends on ARCH_X86
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# MUSL does not define libc types that GCC requires. Mingw lacks certain headers.
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depends on !LIBC_MUSL && !LIBC_MINGW_W64
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help
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Enable GCC support for Intel Memory Protection Extensions (MPX).
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config CC_GCC_LIBSTDCXX_VERBOSE
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tristate
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default n if BARE_METAL
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default m if !BARE_METAL
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prompt "Verbose libstdc++"
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depends on CC_LANG_CXX
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help
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Write descriptive error messages on certain events.
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Those messages cause the library to depend on the demangler and
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standard I/O facilities, which will pull in alot of dependencies
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on static builds.
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On embedded systems this is often not wanted, and the std io
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facilities might not work at all.
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#-----------------------------------------------------------------------------
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comment "Misc. obscure options."
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config CC_CXA_ATEXIT
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bool
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prompt "Use __cxa_atexit"
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default y
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depends on ! BARE_METAL || LIBC_PROVIDES_CXA_ATEXIT
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help
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If you get the missing symbol "__cxa_atexit" when building C++ programs,
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you might want to try disabling this option.
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config CC_GCC_TM_CLONE_REGISTRY
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tristate
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prompt "Use TM clone registry"
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depends on GCC_10_or_later
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default m
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help
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Enable GCC transactional memory clone registry in libgcc.
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Option | tm-clone-registry | Associated ./configure switch
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---------+--------------------+--------------------------------
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Y | forcibly used | --enable-tm-clone-registry
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M | auto | (none, ./configure decides)
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N | forcibly not used | --disable-tm-clone-registry
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config CC_GCC_DISABLE_PCH
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bool
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prompt "Do not build PCH"
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help
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Say 'y' here to not use Pre-Compiled Headers in the resulting toolchain.
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at the expense of speed when compiling C++ code.
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For some configurations (most notably canadian?), PCH are broken, and
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need to be disabled. Please see:
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40974
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config CC_GCC_SJLJ_EXCEPTIONS
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tristate
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prompt "Use sjlj for exceptions"
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depends on ! BARE_METAL
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default m
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help
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'sjlj' is short for setjmp/longjmp.
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On some architectures, stack unwinding during exception handling
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works perfectly well without using sjlj, while on some others,
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use of sjlj is required for proper stack unwinding.
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Option | sjlj use | Associated ./configure switch
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---------+--------------------+--------------------------------
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Y | forcibly used | --enable-sjlj-exceptions
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M | auto | (none, ./configure decides)
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N | forcibly not used | --disable-sjlj-exceptions
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It should be safe to say 'M' or 'N'.
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It can happen that ./configure is wrong in some cases. Known
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case is for ARM big endian, where you should say 'N'.
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config CC_GCC_LDBL_128
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tristate
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prompt "Enable 128-bit long doubles"
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default m
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help
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Saying 'Y' will force gcc to use 128-bit wide long doubles
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Saying 'N' will force gcc to use 64-bit wide long doubles
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Saying 'M' will let gcc choose (default is 128-bit for
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glibc >= 2.4, 64-bit otherwise)
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If in doubt, keep the default, ie. 'M'.
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config CC_GCC_BUILD_ID
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bool
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prompt "Enable build-id"
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help
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Tells GCC to pass --build-id option to the linker for all final
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links (links performed without the -r or --relocatable option),
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if the linker supports it. If you say 'y' here, but your linker
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does not support --build-id option, a warning is issued and this
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option is ignored.
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The default is off.
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choice CC_GCC_LNK_HASH_STYLE_CHOICE
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bool
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prompt "linker hash style"
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config CC_GCC_LNK_HASH_STYLE_DEFAULT
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bool
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prompt "Default"
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help
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Do not specify any value, and use the default value (sysv).
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config CC_GCC_LNK_HASH_STYLE_SYSV
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bool
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prompt "sysv"
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help
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Force use of the SYSV hash style.
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config CC_GCC_LNK_HASH_STYLE_GNU
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bool
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prompt "gnu"
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help
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Force use of the GNU hash style.
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config CC_GCC_LNK_HASH_STYLE_BOTH
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bool
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prompt "both"
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help
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Force use of both hash styles.
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endchoice # CC_GCC_LNK_HASH_STYLE_CHOICE
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config CC_GCC_LNK_HASH_STYLE
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string
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default "" if CC_GCC_LNK_HASH_STYLE_DEFAULT
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default "sysv" if CC_GCC_LNK_HASH_STYLE_SYSV
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default "gnu" if CC_GCC_LNK_HASH_STYLE_GNU
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default "both" if CC_GCC_LNK_HASH_STYLE_BOTH
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choice CC_GCC_DEC_FLOATS_CHOICE
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bool "Decimal floats"
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default CC_GCC_DEC_FLOATS_AUTO
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help
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Choose what type of decimal floats to support.
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Note that using decimal floats requires a C library that provides
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support for fenv (namely, the fenv.h header). This is the case
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for (e)glibc, and uClibc on x86/32. For other C libraries, or
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uClibc on other archs, this might not be the case, so you should
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disable support for decimal floats.
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The default is to let ./configure decide.
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config CC_GCC_DEC_FLOATS_AUTO
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bool "auto"
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help
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Let ./configure decide. If you say 'y' here, gcc will default to:
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- 'bid' for x86 (32- and 64-bit)
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- 'dpd' for powerpc
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- 'no' for the other architectures
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config CC_GCC_DEC_FLOATS_BID
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bool "bid"
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help
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Use the 'binary integer decimal' format for decimal floats.
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config CC_GCC_DEC_FLOATS_DPD
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bool "dpd"
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help
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Use the 'densely packed decimal' for decimal floats.
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config CC_GCC_DEC_FLOATS_NO
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bool "no"
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help
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Do not support decimal floats. The default.
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endchoice # CC_GCC_DEC_FLOATS_CHOICE
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config CC_GCC_DEC_FLOATS
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string
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default "" if CC_GCC_DEC_FLOATS_AUTO
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default "bid" if CC_GCC_DEC_FLOATS_BID
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default "dpd" if CC_GCC_DEC_FLOATS_DPD
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default "no" if CC_GCC_DEC_FLOATS_NO
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#-----------------------------------------------------------------------------
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config CC_GCC_HAS_ARCH_OPTIONS
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bool
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comment "archictecture-specific options"
|
|
depends on CC_GCC_HAS_ARCH_OPTIONS
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if ARCH_MIPS
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source "config/cc/gcc.in.mips"
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endif # ARCH_MIPS
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