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base-files: relink uclibc and libgcc libraries to remove leftovers of the statically linked initial libgcc

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saves a few kb and gets rid of unused not exported functions as well
should also improve the reliability of mklibs

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@25800 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
nbd 2011-03-01 05:40:38 +00:00
parent 2892cc195c
commit d082297902
2 changed files with 73 additions and 5 deletions
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64
package/base-files/Makefile
View File

@ -327,8 +327,56 @@ endef
define Build/Compile/Default
endef
LIBGCC_A=$(wildcard $(TOOLCHAIN_DIR)/lib/gcc/*/*/libgcc_pic.a)
LIBGCC_MAP=$(wildcard $(TOOLCHAIN_DIR)/lib/gcc/*/*/libgcc.map)
ifeq ($(CONFIG_EXTERNAL_TOOLCHAIN),)
define Build/Compile/uClibc
$(SCRIPT_DIR)/relink-lib.sh \
"$(TARGET_CROSS)" \
"$(wildcard $(TOOLCHAIN_DIR)/lib/libc_so.a)" \
"$(wildcard $(TOOLCHAIN_DIR)/lib/libc_so.a)" \
"$(patsubst $(TOOLCHAIN_DIR)/lib/%,$(PKG_BUILD_DIR)/%,$(wildcard $(TOOLCHAIN_DIR)/lib/libuClibc-*.so))" \
-Wl,-init,__uClibc_init -Wl,-soname=libc.so.0 \
$(PKG_BUILD_DIR)/libgcc_s.so.*
$(SCRIPT_DIR)/relink-lib.sh \
"$(TARGET_CROSS)" \
"$(wildcard $(TOOLCHAIN_DIR)/lib/libcrypt-*.so)" \
"$(wildcard $(TOOLCHAIN_DIR)/lib/libcrypt_pic.a)" \
"$(patsubst $(TOOLCHAIN_DIR)/lib/%,$(PKG_BUILD_DIR)/%,$(wildcard $(TOOLCHAIN_DIR)/lib/libcrypt-*.so))" \
$(PKG_BUILD_DIR)/libgcc_s.so.* \
-Wl,-soname=libcrypt.so.0
$(SCRIPT_DIR)/relink-lib.sh \
"$(TARGET_CROSS)" \
"$(wildcard $(TOOLCHAIN_DIR)/lib/libm-*.so)" \
"$(wildcard $(TOOLCHAIN_DIR)/lib/libm_pic.a)" \
"$(patsubst $(TOOLCHAIN_DIR)/lib/%,$(PKG_BUILD_DIR)/%,$(wildcard $(TOOLCHAIN_DIR)/lib/libm-*.so))" \
$(PKG_BUILD_DIR)/libgcc_s.so.* \
-Wl,-soname=libm.so.0
$(SCRIPT_DIR)/relink-lib.sh \
"$(TARGET_CROSS)" \
"$(wildcard $(TOOLCHAIN_DIR)/lib/libpthread-*.so)" \
"$(wildcard $(TOOLCHAIN_DIR)/lib/libpthread_so.a)" \
"$(patsubst $(TOOLCHAIN_DIR)/lib/%,$(PKG_BUILD_DIR)/%,$(wildcard $(TOOLCHAIN_DIR)/lib/libpthread-*.so))" \
-Wl,-z,nodelete,-z,initfirst,-init=__pthread_initialize_minimal_internal \
$(PKG_BUILD_DIR)/libgcc_s.so.* \
-Wl,-soname=libpthread.so.0
endef
define Build/Compile/libgcc
$(SCRIPT_DIR)/relink-lib.sh \
"$(TARGET_CROSS)" \
"$(wildcard $(TOOLCHAIN_DIR)/lib/libgcc_s.so.*)" \
"$(LIBGCC_A)" \
"$(patsubst $(TOOLCHAIN_DIR)/lib/%,$(PKG_BUILD_DIR)/%,$(wildcard $(TOOLCHAIN_DIR)/lib/libgcc_s.so.*))" \
-Wl,--version-script=$(LIBGCC_MAP) -Wl,-soname=libgcc_s.so.1
endef
endif
define Build/Compile
$(call Build/Compile/Default)
$(call Build/Compile/libgcc)
$(call Build/Compile/$(LIBC))
endef
define Package/base-files/install
@ -398,7 +446,7 @@ ifeq ($(CONFIG_EXTERNAL_TOOLCHAIN),)
define Package/libgcc/install
$(INSTALL_DIR) $(1)/lib
$(CP) $(TOOLCHAIN_DIR)/lib/libgcc_s.so.* $(1)/lib/
$(CP) $(PKG_BUILD_DIR)/libgcc_s.so.* $(1)/lib/
endef
define Package/libssp/install
@ -450,6 +498,12 @@ ifeq ($(CONFIG_EXTERNAL_TOOLCHAIN),)
$(TOOLCHAIN_DIR)/lib/$$$$file-$(LIBC_SO_VERSION).so \
$(1)/lib/; \
done
$(CP) \
$(PKG_BUILD_DIR)/libuClibc-* \
$(PKG_BUILD_DIR)/libm-* \
$(PKG_BUILD_DIR)/libcrypt-* \
$(1)/lib/
endef
define Package/libc/install
@ -459,9 +513,9 @@ ifeq ($(CONFIG_EXTERNAL_TOOLCHAIN),)
define Package/libc/install_lib
$(CP) $(filter-out %/libdl_pic.a %/libpthread_pic.a %/libresolv_pic.a,$(wildcard $(TOOLCHAIN_DIR)/lib/lib*.a)) $(1)/lib/
$(if $(wildcard $(TOOLCHAIN_DIR)/lib/libc_so.a),$(CP) $(TOOLCHAIN_DIR)/lib/libc_so.a $(1)/lib/libc_pic.a)
$(if $(wildcard $(TOOLCHAIN_DIR)/lib/gcc/*/*/libgcc.map), \
$(CP) $(TOOLCHAIN_DIR)/lib/gcc/*/*/libgcc_pic.a $(1)/lib/libgcc_s_pic.a; \
$(CP) $(TOOLCHAIN_DIR)/lib/gcc/*/*/libgcc.map $(1)/lib/libgcc_s_pic.map \
$(if $(LIBGCC_MAP), \
$(CP) $(LIBGCC_A) $(1)/lib/libgcc_s_pic.a; \
$(CP) $(LIBGCC_MAP) $(1)/lib/libgcc_s_pic.map \
)
endef
@ -469,7 +523,7 @@ ifeq ($(CONFIG_EXTERNAL_TOOLCHAIN),)
$(INSTALL_DIR) $(1)/lib
$(CP) \
$(TOOLCHAIN_DIR)/lib/libpthread.so.* \
$(TOOLCHAIN_DIR)/lib/libpthread-$(LIBC_SO_VERSION).so \
$(PKG_BUILD_DIR)/libpthread-$(LIBC_SO_VERSION).so \
$(1)/lib/
endef

14
scripts/relink-lib.sh Executable file
View File

@ -0,0 +1,14 @@
#!/bin/sh
[ $# -lt 4 -o -z "$1" -o -z "$2" -o -z "$3" -o -z "$4" ] && {
echo "Usage: $0 <cross> <reference> <pic .a> <destination>"
exit 1
}
cross="$1"; shift
ref="$1"; shift
pic="$1"; shift
dest="$1"; shift
SYMBOLS="$(${cross}nm "$ref" | grep -E '........ [TW] ' | awk '$3 {printf "-u%s ", $3}')"
set -x
${cross}gcc -nostdlib -nostartfiles -shared -Wl,--gc-sections -o "$dest" $SYMBOLS "$pic" "$@"