eglibc: enable support in the Buildroot toolchain backend
Using the newly introduced 'eglibc' package, this commit enables the option of building a toolchain using the eglibc C library in the Buildroot toolchain backend. In details, this commit: * Creates a choice to select uClibc or eglibc in the Buildroot toolchain backend (in toolchain/toolchain-buildroot/Config.in), and removes the fact that the Buildroot toolchain backend forcefully enables uClibc (toolchain/Config.in). * Creates a BUILDROOT_LIBC variables, which points to the package implementing the C library (i.e either 'uclibc' or 'eglibc'). * Modifies the gcc-final and gcc-intermediate makefiles to use the BUILDROOT_LIBC variable instead of hardcoding the use of uclibc. * Ensures that TLS support is always enabled when building eglibc. [Peter: fix commit text to refer to BUILDROOT_LIBC] Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
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@ -114,9 +114,9 @@ config BR2_GCC_SHARED_LIBGCC
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Build/install a shared libgcc library
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config BR2_GCC_ENABLE_TLS
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bool "Enable compiler tls support"
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bool "Enable compiler tls support" if BR2_TOOLCHAIN_BUILDROOT_UCLIBC
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default y
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depends on BR2_PTHREADS_NATIVE
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depends on BR2_PTHREADS_NATIVE || BR2_TOOLCHAIN_BUILDROOT_EGLIBC
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help
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Enable the compiler to generate code for accessing
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thread local storage variables
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@ -10,7 +10,7 @@ GCC_FINAL_SOURCE = $(GCC_SOURCE)
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HOST_GCC_FINAL_DEPENDENCIES = \
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$(HOST_GCC_COMMON_DEPENDENCIES) \
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uclibc
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$(BUILDROOT_LIBC)
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HOST_GCC_FINAL_EXTRACT_CMDS = $(HOST_GCC_EXTRACT_CMDS)
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@ -10,7 +10,7 @@ GCC_INTERMEDIATE_SOURCE = $(GCC_SOURCE)
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HOST_GCC_INTERMEDIATE_DEPENDENCIES = \
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$(HOST_GCC_COMMON_DEPENDENCIES) \
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uclibc-configure
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$(BUILDROOT_LIBC)-configure
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HOST_GCC_INTERMEDIATE_EXTRACT_CMDS = $(HOST_GCC_EXTRACT_CMDS)
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@ -1,3 +1,5 @@
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if BR2_TOOLCHAIN_BUILDROOT_UCLIBC
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comment "uClibc Options"
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choice
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@ -241,3 +243,5 @@ config BR2_UCLIBC_X86_TYPE
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default PENTIUMIII if BR2_x86_pentium3
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default PENTIUM4 if BR2_x86_pentium4 || BR2_x86_pentium_m || \
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BR2_x86_nocona || BR2_x86_core2
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endif # BR2_TOOLCHAIN_BUILDROOT_UCLIBC
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@ -27,7 +27,6 @@ config BR2_TOOLCHAIN_BUILDROOT
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bool "Buildroot toolchain"
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depends on !BR2_microblaze && !BR2_aarch64
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select BR2_TOOLCHAIN_HAS_SHADOW_PASSWORDS
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select BR2_TOOLCHAIN_USES_UCLIBC
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config BR2_TOOLCHAIN_EXTERNAL
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bool "External toolchain"
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@ -2,4 +2,8 @@
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# build of binutils, uClibc, kernel headers and all the intermediate
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# gcc steps.
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include toolchain/helpers.mk
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BUILDROOT_LIBC = $(call qstrip,$(BR2_TOOLCHAIN_BUILDROOT_LIBC))
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toolchain-buildroot: host-gcc-final
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@ -2,7 +2,47 @@
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if BR2_TOOLCHAIN_BUILDROOT
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source "package/linux-headers/Config.in.host"
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choice
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prompt "C library"
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config BR2_TOOLCHAIN_BUILDROOT_UCLIBC
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bool "uClibc"
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select BR2_TOOLCHAIN_USES_UCLIBC
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help
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This option selects uClibc as the C library for the
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cross-compilation toolchain.
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http://uclibc.org
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config BR2_TOOLCHAIN_BUILDROOT_EGLIBC
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bool "eglibc (experimental)"
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depends on BR2_arm || BR2_armeb || BR2_aarch64 || \
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BR2_i386 || BR2_mips || BR2_mipsel || \
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BR2_mips64 || BR2_mips64el || BR2_powerpc || \
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BR2_sh || BR2_sh64 || BR2_sparc || \
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BR2_x86_64
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select BR2_TOOLCHAIN_USES_GLIBC
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# our eglibc.mk enables RPC support
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select BR2_TOOLCHAIN_HAS_NATIVE_RPC
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help
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This option selects eglibc as the C library for the
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cross-compilation toolchain.
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The eglibc support in the Buildroot toolchain backend is
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very recent, and therefore marked experimental.
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http://eglibc.org
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endchoice
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config BR2_TOOLCHAIN_BUILDROOT_LIBC
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string
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default "uclibc" if BR2_TOOLCHAIN_BUILDROOT_UCLIBC
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default "eglibc" if BR2_TOOLCHAIN_BUILDROOT_EGLIBC
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source "package/uclibc/Config.in"
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source "package/binutils/Config.in.host"
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source "package/gcc/Config.in.host"
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endif
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