@@ -114,9 +114,9 @@ config BR2_GCC_SHARED_LIBGCC
Build/install a shared libgcc library
config BR2_GCC_ENABLE_TLS
- bool "Enable compiler tls support"
+ bool "Enable compiler tls support" if BR2_TOOLCHAIN_BUILDROOT_UCLIBC
default y
- depends on BR2_PTHREADS_NATIVE
+ depends on BR2_PTHREADS_NATIVE || BR2_TOOLCHAIN_BUILDROOT_EGLIBC
help
Enable the compiler to generate code for accessing
thread local storage variables
@@ -10,7 +10,7 @@ GCC_FINAL_SOURCE = $(GCC_SOURCE)
HOST_GCC_FINAL_DEPENDENCIES = \
$(HOST_GCC_COMMON_DEPENDENCIES) \
- uclibc
+ $(BUILDROOT_LIBC)
HOST_GCC_FINAL_EXTRACT_CMDS = $(HOST_GCC_EXTRACT_CMDS)
@@ -10,7 +10,7 @@ GCC_INTERMEDIATE_SOURCE = $(GCC_SOURCE)
HOST_GCC_INTERMEDIATE_DEPENDENCIES = \
$(HOST_GCC_COMMON_DEPENDENCIES) \
- uclibc-configure
+ $(BUILDROOT_LIBC)-configure
HOST_GCC_INTERMEDIATE_EXTRACT_CMDS = $(HOST_GCC_EXTRACT_CMDS)
@@ -1,3 +1,5 @@
+if BR2_TOOLCHAIN_BUILDROOT_UCLIBC
+
comment "uClibc Options"
choice
@@ -241,3 +243,5 @@ config BR2_UCLIBC_X86_TYPE
default PENTIUMIII if BR2_x86_pentium3
default PENTIUM4 if BR2_x86_pentium4 || BR2_x86_pentium_m || \
BR2_x86_nocona || BR2_x86_core2
+
+endif # BR2_TOOLCHAIN_BUILDROOT_UCLIBC
@@ -27,7 +27,6 @@ config BR2_TOOLCHAIN_BUILDROOT
bool "Buildroot toolchain"
depends on !BR2_microblaze && !BR2_aarch64
select BR2_TOOLCHAIN_HAS_SHADOW_PASSWORDS
- select BR2_TOOLCHAIN_USES_UCLIBC
config BR2_TOOLCHAIN_EXTERNAL
bool "External toolchain"
@@ -2,4 +2,8 @@
# build of binutils, uClibc, kernel headers and all the intermediate
# gcc steps.
+include toolchain/helpers.mk
+
+BUILDROOT_LIBC = $(call qstrip,$(BR2_TOOLCHAIN_BUILDROOT_LIBC))
+
toolchain-buildroot: host-gcc-final
@@ -2,7 +2,47 @@
if BR2_TOOLCHAIN_BUILDROOT
source "package/linux-headers/Config.in.host"
+
+choice
+ prompt "C library"
+
+config BR2_TOOLCHAIN_BUILDROOT_UCLIBC
+ bool "uClibc"
+ select BR2_TOOLCHAIN_USES_UCLIBC
+ help
+ This option selects uClibc as the C library for the
+ cross-compilation toolchain.
+
+ http://uclibc.org
+
+config BR2_TOOLCHAIN_BUILDROOT_EGLIBC
+ bool "eglibc (experimental)"
+ depends on BR2_arm || BR2_armeb || BR2_aarch64 || \
+ BR2_i386 || BR2_mips || BR2_mipsel || \
+ BR2_mips64 || BR2_mips64el || BR2_powerpc || \
+ BR2_sh || BR2_sh64 || BR2_sparc || \
+ BR2_x86_64
+ select BR2_TOOLCHAIN_USES_GLIBC
+ # our eglibc.mk enables RPC support
+ select BR2_TOOLCHAIN_HAS_NATIVE_RPC
+ help
+ This option selects eglibc as the C library for the
+ cross-compilation toolchain.
+
+ The eglibc support in the Buildroot toolchain backend is
+ very recent, and therefore marked experimental.
+
+ http://eglibc.org
+
+endchoice
+
+config BR2_TOOLCHAIN_BUILDROOT_LIBC
+ string
+ default "uclibc" if BR2_TOOLCHAIN_BUILDROOT_UCLIBC
+ default "eglibc" if BR2_TOOLCHAIN_BUILDROOT_EGLIBC
+
source "package/uclibc/Config.in"
+
source "package/binutils/Config.in.host"
source "package/gcc/Config.in.host"
endif
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_UCLIBC 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_UCLIBC variable instead of hardcoding the use of uclibc. * Ensures that TLS support is always enabled when building eglibc. Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> --- package/gcc/Config.in.host | 4 +-- package/gcc/gcc-final/gcc-final.mk | 2 +- package/gcc/gcc-intermediate/gcc-intermediate.mk | 2 +- package/uclibc/Config.in | 4 +++ toolchain/Config.in | 1 - toolchain/toolchain-buildroot.mk | 4 +++ toolchain/toolchain-buildroot/Config.in | 40 ++++++++++++++++++++++++ 7 files changed, 52 insertions(+), 5 deletions(-)