toolchain: add support for glibc

The support for eglibc 2.17 was added to the internal toolchain
backend for 2013.08. This commit now adds glibc 2.18 support to the
internal toolchain backend.

Since the building procedure is very similar to the one of eglibc, we
have renamed the 'eglibc' package to 'glibc', and made it capable of
handling either glibc or eglibc.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

1 files changed, 113 insertions, 0 deletions

diff --git a/package/glibc/glibc.mk b/package/glibc/glibc.mk
new file mode 100644
index 0000000000..4dd2e63204
--- /dev/null
+++ b/package/glibc/glibc.mk
@@ -0,0 +1,113 @@
+################################################################################
+#
+# glibc/eglibc
+#
+################################################################################
+
+ifeq ($(BR2_TOOLCHAIN_BUILDROOT_EGLIBC),y)
+GLIBC_VERSION = 2.17-svnr22064
+GLIBC_SITE = http://downloads.yoctoproject.org/releases/eglibc/
+GLIBC_SOURCE = eglibc-$(GLIBC_VERSION).tar.bz2
+GLIBC_SRC_SUBDIR = libc
+else
+GLIBC_VERSION = 2.18
+GLIBC_SITE = $(BR2_GNU_MIRROR)/libc
+GLIBC_SOURCE = glibc-$(GLIBC_VERSION).tar.xz
+GLIBC_SRC_SUBDIR = .
+endif
+
+GLIBC_LICENSE = GPLv2+ (programs), LGPLv2.1+, BSD-3c, MIT (library)
+GLIBC_LICENSE_FILES = $(addprefix $(GLIBC_SRC_SUBDIR)/,COPYING COPYING.LIB LICENSES)
+
+# Before (e)glibc is configured, we must have the first stage
+# cross-compiler and the kernel headers
+GLIBC_DEPENDENCIES = host-gcc-initial linux-headers
+
+# eglibc also needs host-gawk
+ifeq ($(BR2_TOOLCHAIN_BUILDROOT_EGLIBC),y)
+GLIBC_DEPENDENCIES += host-gawk
+endif
+
+# Before (e)glibc is built, we must have the second stage
+# cross-compiler, for some gcc versions
+glibc-build: $(if $(BR2_TOOLCHAIN_NEEDS_THREE_STAGE_BUILD),host-gcc-intermediate)
+
+GLIBC_SUBDIR = build
+
+GLIBC_INSTALL_STAGING = YES
+
+GLIBC_INSTALL_STAGING_OPT = install_root=$(STAGING_DIR) install
+
+# Thumb build is broken, build in ARM mode
+ifeq ($(BR2_ARM_INSTRUCTIONS_THUMB),y)
+GLIBC_EXTRA_CFLAGS += -marm
+endif
+
+# Even though we use the autotools-package infrastructure, we have to
+# override the default configure commands for several reasons:
+#
+#  1. We have to build out-of-tree, but we can't use the same
+#     'symbolic link to configure' used with the gcc packages.
+#
+#  2. We have to execute the configure script with bash and not sh.
+#
+# Note that as mentionned in
+# http://patches.openembedded.org/patch/38849/, eglibc/glibc must be
+# built with -O2, so we pass our own CFLAGS and CXXFLAGS below.
+define GLIBC_CONFIGURE_CMDS
+	mkdir -p $(@D)/build
+	# Do the configuration
+	(cd $(@D)/build; \
+		$(TARGET_CONFIGURE_OPTS) \
+		CFLAGS="-O2 $(GLIBC_EXTRA_CFLAGS)" CPPFLAGS="" \
+		CXXFLAGS="-O2 $(GLIBC_EXTRA_CFLAGS)" \
+		$(SHELL) $(@D)/$(GLIBC_SRC_SUBDIR)/configure \
+		ac_cv_path_BASH_SHELL=/bin/bash \
+		libc_cv_forced_unwind=yes \
+		--target=$(GNU_TARGET_NAME) \
+		--host=$(GNU_TARGET_NAME) \
+		--build=$(GNU_HOST_NAME) \
+		--prefix=/usr \
+		--enable-shared \
+		$(if $(BR2_SOFT_FLOAT),--without-fp,--with-fp) \
+		--with-pkgversion="Buildroot" \
+		--without-cvs \
+		--disable-profile \
+		--without-gd \
+		--enable-obsolete-rpc \
+		--with-headers=$(STAGING_DIR)/usr/include)
+	# Install headers and start files
+	$(TARGET_MAKE_ENV) $(MAKE) -C $(@D)/build \
+		install_root=$(STAGING_DIR) \
+		install-bootstrap-headers=yes \
+		install-headers
+	$(TARGET_MAKE_ENV) $(MAKE) -C $(@D)/build csu/subdir_lib
+	cp $(@D)/build/csu/crt1.o $(STAGING_DIR)/usr/lib/
+	cp $(@D)/build/csu/crti.o $(STAGING_DIR)/usr/lib/
+	cp $(@D)/build/csu/crtn.o $(STAGING_DIR)/usr/lib/
+	$(TARGET_CROSS)gcc -nostdlib \
+		-nostartfiles -shared -x c /dev/null -o $(STAGING_DIR)/usr/lib/libc.so
+endef
+
+
+#
+# We also override the install to target commands since we only want
+# to install the libraries, and nothing more.
+#
+
+GLIBC_LIBS_LIB = \
+	ld*.so libc.so libcrypt.so libdl.so libgcc_s.so libm.so	   \
+	libnsl.so libpthread.so libresolv.so librt.so libutil.so   \
+	libnss_files.so libnss_dns.so
+
+ifeq ($(BR2_PACKAGE_GDB_SERVER),y)
+GLIBC_LIBS_LIB += libthread_db.so
+endif
+
+define GLIBC_INSTALL_TARGET_CMDS
+	for libs in $(GLIBC_LIBS_LIB); do \
+		$(call copy_toolchain_lib_root,$(STAGING_DIR)/,,lib,$$libs,/lib) ; \
+	done
+endef
+
+$(eval $(autotools-package))