eglibc: new package

This commit adds a target 'eglibc' package. For now, there is no way
to build this package, the next commit will add the integration of
eglibc into the Buildroot toolchain backend.

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

package/eglibc/eglibc.mk

@@ -0,0 +1,94 @@
+################################################################################
+#
+# eglibc
+#
+################################################################################
+
+EGLIBC_VERSION = 2.17-svnr22064
+EGLIBC_SITE = http://downloads.yoctoproject.org/releases/eglibc/
+EGLIBC_SOURCE = eglibc-$(EGLIBC_VERSION).tar.bz2
+
+# Before eglibc is configured, we must have the first stage
+# cross-compiler and the kernel headers
+EGLIBC_DEPENDENCIES = host-gcc-initial linux-headers host-gawk
+
+# Before eglibc is built, we must have the second stage cross-compiler
+eglibc-build: host-gcc-intermediate
+
+EGLIBC_SUBDIR = build
+
+EGLIBC_INSTALL_STAGING = YES
+
++EGLIBC_INSTALL_STAGING_OPT = install_root=$(STAGING_DIR) install
+
+# 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.
+#
+define EGLIBC_CONFIGURE_CMDS
+	mkdir -p $(@D)/build
+	# Do the configuration
+	(cd $(@D)/build; \
+		$(TARGET_CONFIGURE_OPTS) \
+		CFLAGS="-O2" CPPFLAGS="" CXXFLAGS="-O2" \
+		$(SHELL) $(@D)/libc/configure \
+		ac_cv_path_BASH_SHELL=/bin/bash \
+		libc_cv_forced_unwind=yes \
+		--target=$(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 $(REALLY_NOSTDLIB) \
+		-nostartfiles -shared -x c /dev/null -o $(STAGING_DIR)/usr/lib/libc.so
+endef
+
+
+#
+# We also override the install to target commands since we only want
+# to install the libraries, and nothing more.
+#
+
+EGLIBC_LIBS_LIB = \
+	ld*.so libc.so libcrypt.so libdl.so libgcc_s.so libm.so	   \
+	libnsl.so libpthread.so libresolv.so librt.so libutil.so   \
+	libnss_files.so libnss_dns.so
+
+ifeq ($(BR2_PACKAGE_GDB_SERVER),y)
+EGLIBC_LIBS_LIB += libthread_db.so
+endif
+
+ifeq ($(BR2_INSTALL_LIBSTDCPP),y)
+EGLIBC_LIBS_USR_LIB += libstdc++.so
+endif
+
+define EGLIBC_INSTALL_TARGET_CMDS
+	for libs in $(EGLIBC_LIBS_LIB); do \
+		$(call copy_toolchain_lib_root,$(STAGING_DIR)/,,lib,$$libs,/lib) ; \
+	done
+	for libs in $(EGLIBC_LIBS_USR_LIB); do \
+		$(call copy_toolchain_lib_root,$(STAGING_DIR)/,,lib,$$libs,/usr/lib) ; \
+	done
+endef
+
+$(eval $(autotools-package))