toolchain: remove multilib

Supporting multilib is much more than just passing --enable-multilib
to gcc. You have to actually build the C library several times (once
for each multilib variant you want to support in your toolchain), and
to pass MULTILIB_OPTIONS/MULTILIB_EXCEPTIONS values to gcc to let it
know the set of multilib variants you're interested in.

Since we'll probably never support multilib toolchains in Buildroot,
just get rid of this BR2_ENABLE_MULTILIB option.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

4 files changed, 1 insertions, 17 deletions

diff --git a/toolchain/Makefile.in b/toolchain/Makefile.in
index d1af87747..371509f4e 100644
--- a/toolchain/Makefile.in
+++ b/toolchain/Makefile.in
@@ -4,12 +4,6 @@ else
 THREADS:=--enable-threads
 endif
 
-ifeq ($(BR2_ENABLE_MULTILIB),y)
-MULTILIB:=--enable-multilib
-else
-MULTILIB:=--disable-multilib
-endif
-
 BR2_CONFIGURE_DEVEL_SYSROOT=--with-sysroot=$(TOOLCHAIN_DIR)/uClibc_dev/
 BR2_CONFIGURE_STAGING_SYSROOT=--with-sysroot=$(STAGING_DIR)
 BR2_CONFIGURE_BUILD_TOOLS=--with-build-time-tools=$(STAGING_DIR)/usr/$(REAL_GNU_TARGET_NAME)/bin
diff --git a/toolchain/binutils/binutils.mk b/toolchain/binutils/binutils.mk
index 93dbbb007..e44707c57 100644
--- a/toolchain/binutils/binutils.mk
+++ b/toolchain/binutils/binutils.mk
@@ -74,7 +74,6 @@ $(BINUTILS_DIR1)/.configured: $(BINUTILS_DIR)/.patched
 		$(BR2_CONFIGURE_DEVEL_SYSROOT) \
 		$(BR2_CONFIGURE_STAGING_SYSROOT) \
 		$(DISABLE_NLS) \
-		$(MULTILIB) \
 		--disable-werror \
 		$(SOFT_FLOAT_CONFIG_OPTION) \
 		$(EXTRA_BINUTILS_CONFIG_OPTIONS) \
@@ -128,7 +127,6 @@ $(BINUTILS_DIR2)/.configured: $(BINUTILS_DIR)/.patched
 		--mandir=/usr/share/man \
 		--infodir=/usr/share/info \
 		$(DISABLE_NLS) \
-		$(MULTILIB) \
 		$(BINUTILS_TARGET_CONFIG_OPTIONS) \
 		--disable-werror \
 		$(SOFT_FLOAT_CONFIG_OPTION) \
diff --git a/toolchain/gcc/gcc-uclibc-4.x.mk b/toolchain/gcc/gcc-uclibc-4.x.mk
index d9269bd23..b87270f8f 100644
--- a/toolchain/gcc/gcc-uclibc-4.x.mk
+++ b/toolchain/gcc/gcc-uclibc-4.x.mk
@@ -167,7 +167,7 @@ ifeq ("$(strip $(ARCH))","armeb")
 endif
 endif
 ifeq ($(ARCH)-$(BR2_GCC_SHARED_LIBGCC),powerpc-y)
-ifneq ($(BR2_SOFT_FLOAT)$(BR2_ENABLE_MULTILIB),)
+ifneq ($(BR2_SOFT_FLOAT),)
 	toolchain/patch-kernel.sh $(GCC_DIR) toolchain/gcc/$(GCC_VERSION) powerpc-link-with-math-lib.patch.conditional
 endif
 endif
@@ -206,7 +206,6 @@ $(GCC_BUILD_DIR1)/.configured: $(GCC_DIR)/.patched
 		$(GCC_WITH_HOST_MPFR) \
 		$(DISABLE_NLS) \
 		$(THREADS) \
-		$(MULTILIB) \
 		$(GCC_DECIMAL_FLOAT) \
 		$(SOFT_FLOAT_CONFIG_OPTION) \
 		$(GCC_WITH_ABI) $(GCC_WITH_ARCH) $(GCC_WITH_TUNE) \
@@ -286,7 +285,6 @@ $(GCC_BUILD_DIR2)/.configured: $(GCC_SRC_DIR)/.patched $(GCC_STAGING_PREREQ)
 		$(GCC_WITH_HOST_MPFR) \
 		$(DISABLE_NLS) \
 		$(THREADS) \
-		$(MULTILIB) \
 		$(GCC_DECIMAL_FLOAT) \
 		$(SOFT_FLOAT_CONFIG_OPTION) \
 		$(GCC_WITH_ABI) $(GCC_WITH_ARCH) $(GCC_WITH_TUNE) \
@@ -419,7 +417,6 @@ $(GCC_BUILD_DIR3)/.configured: $(GCC_BUILD_DIR3)/.prepared
 		$(GCC_WITH_TARGET_MPFR) \
 		$(DISABLE_NLS) \
 		$(THREADS) \
-		$(MULTILIB) \
 		$(GCC_DECIMAL_FLOAT) \
 		$(SOFT_FLOAT_CONFIG_OPTION) \
 		$(GCC_WITH_ABI) $(GCC_WITH_ARCH) $(GCC_WITH_TUNE) \
diff --git a/toolchain/toolchain-buildroot/Config.in.2 b/toolchain/toolchain-buildroot/Config.in.2
index 512a60844..2a17796fa 100644
--- a/toolchain/toolchain-buildroot/Config.in.2
+++ b/toolchain/toolchain-buildroot/Config.in.2
@@ -5,11 +5,6 @@ source "toolchain/elf2flt/Config.in"
 source "toolchain/mklibs/Config.in"
 source "toolchain/sstrip/Config.in"
 
-config BR2_ENABLE_MULTILIB
-	bool "Enable multilib support?"
-	help
-	    Build libraries to support different ABIs.
-
 config BR2_VFP_FLOAT
 	bool "Use ARM Vector Floating Point unit"
 	depends on !BR2_SOFT_FLOAT