# DP: On linux targets pass --as-needed by default to the linker.

Index: b/src/gcc/config/aarch64/aarch64-linux.h
===================================================================
--- a/src/gcc/config/aarch64/aarch64-linux.h
+++ b/src/gcc/config/aarch64/aarch64-linux.h
@@ -33,6 +33,7 @@
 
 #define LINUX_TARGET_LINK_SPEC  "%{h*}		\
    --hash-style=gnu				\
+   --as-needed					\
    %{static:-Bstatic}				\
    %{shared:-shared}				\
    %{symbolic:-Bsymbolic}			\
Index: b/src/gcc/config/ia64/linux.h
===================================================================
--- a/src/gcc/config/ia64/linux.h
+++ b/src/gcc/config/ia64/linux.h
@@ -59,7 +59,7 @@
 #define GLIBC_DYNAMIC_LINKER "/lib/ld-linux-ia64.so.2"
 
 #undef LINK_SPEC
-#define LINK_SPEC " --hash-style=gnu \
+#define LINK_SPEC " --hash-style=gnu --as-needed \
   %{shared:-shared} \
   %{!shared: \
     %{!static: \
Index: b/src/gcc/config/sparc/linux.h
===================================================================
--- a/src/gcc/config/sparc/linux.h
+++ b/src/gcc/config/sparc/linux.h
@@ -87,7 +87,7 @@
 #define GLIBC_DYNAMIC_LINKER "/lib/ld-linux.so.2"
 
 #undef  LINK_SPEC
-#define LINK_SPEC "-m elf32_sparc --hash-style=gnu -Y P,/usr/lib %{shared:-shared} \
+#define LINK_SPEC "-m elf32_sparc --hash-style=gnu --as-needed -Y P,/usr/lib %{shared:-shared} \
   %{!mno-relax:%{!r:-relax}} \
   %{!shared: \
     %{!static: \
Index: b/src/gcc/config/s390/linux.h
===================================================================
--- a/src/gcc/config/s390/linux.h
+++ b/src/gcc/config/s390/linux.h
@@ -66,7 +66,7 @@
 
 #undef  LINK_SPEC
 #define LINK_SPEC \
-  "%{m31:-m elf_s390}%{m64:-m elf64_s390} --hash-style=gnu \
+  "%{m31:-m elf_s390}%{m64:-m elf64_s390} --hash-style=gnu --as-needed \
    %{shared:-shared} \
    %{!shared: \
       %{static:-static} \
Index: b/src/gcc/config/rs6000/linux64.h
===================================================================
--- a/src/gcc/config/rs6000/linux64.h
+++ b/src/gcc/config/rs6000/linux64.h
@@ -375,11 +375,11 @@
   CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER64, UCLIBC_DYNAMIC_LINKER64)
 
 
-#define LINK_OS_LINUX_SPEC32 "-m elf32ppclinux --hash-style=gnu %{!shared: %{!static: \
+#define LINK_OS_LINUX_SPEC32 "-m elf32ppclinux --hash-style=gnu --as-needed %{!shared: %{!static: \
   %{rdynamic:-export-dynamic} \
   -dynamic-linker " GNU_USER_DYNAMIC_LINKER32 "}}"
 
-#define LINK_OS_LINUX_SPEC64 "-m elf64ppc --hash-style=gnu %{!shared: %{!static: \
+#define LINK_OS_LINUX_SPEC64 "-m elf64ppc --hash-style=gnu --as-needed %{!shared: %{!static: \
   %{rdynamic:-export-dynamic} \
   -dynamic-linker " GNU_USER_DYNAMIC_LINKER64 "}}"
 
Index: b/src/gcc/config/rs6000/sysv4.h
===================================================================
--- a/src/gcc/config/rs6000/sysv4.h
+++ b/src/gcc/config/rs6000/sysv4.h
@@ -814,7 +814,7 @@
 #define GNU_USER_DYNAMIC_LINKER \
   CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER, UCLIBC_DYNAMIC_LINKER)
 
-#define LINK_OS_LINUX_SPEC "-m elf32ppclinux --hash-style=gnu %{!shared: %{!static: \
+#define LINK_OS_LINUX_SPEC "-m elf32ppclinux --hash-style=gnu --as-needed %{!shared: %{!static: \
   %{rdynamic:-export-dynamic} \
   -dynamic-linker " GNU_USER_DYNAMIC_LINKER "}}"
 
Index: b/src/gcc/config/i386/gnu-user64.h
===================================================================
--- a/src/gcc/config/i386/gnu-user64.h
+++ b/src/gcc/config/i386/gnu-user64.h
@@ -82,6 +82,7 @@
                    %{" SPEC_32 ":-m " GNU_USER_LINK_EMULATION32 "} \
                    %{" SPEC_X32 ":-m " GNU_USER_LINK_EMULATIONX32 "} \
   --hash-style=gnu \
+  --as-needed \
   %{shared:-shared} \
   %{!shared: \
     %{!static: \
Index: b/src/gcc/config/i386/gnu-user.h
===================================================================
--- a/src/gcc/config/i386/gnu-user.h
+++ b/src/gcc/config/i386/gnu-user.h
@@ -98,7 +98,7 @@
   { "dynamic_linker", GNU_USER_DYNAMIC_LINKER }
 
 #undef	LINK_SPEC
-#define LINK_SPEC "-m %(link_emulation) --hash-style=gnu %{shared:-shared} \
+#define LINK_SPEC "-m %(link_emulation) --hash-style=gnu --as-needed %{shared:-shared} \
   %{!shared: \
     %{!static: \
       %{rdynamic:-export-dynamic} \
Index: b/src/gcc/config/alpha/linux-elf.h
===================================================================
--- a/src/gcc/config/alpha/linux-elf.h
+++ b/src/gcc/config/alpha/linux-elf.h
@@ -38,7 +38,7 @@
 
 #define ELF_DYNAMIC_LINKER	GNU_USER_DYNAMIC_LINKER
 
-#define LINK_SPEC "-m elf64alpha --hash-style=gnu %{G*} %{relax:-relax}	\
+#define LINK_SPEC "-m elf64alpha --hash-style=gnu --as-needed %{G*} %{relax:-relax}	\
   %{O*:-O3} %{!O*:-O1}						\
   %{shared:-shared}						\
   %{!shared:							\
Index: b/src/gcc/config/arm/linux-elf.h
===================================================================
--- a/src/gcc/config/arm/linux-elf.h
+++ b/src/gcc/config/arm/linux-elf.h
@@ -69,6 +69,7 @@
    -dynamic-linker " GNU_USER_DYNAMIC_LINKER " \
    -X \
    --hash-style=gnu \
+   --as-needed \
    %{mbig-endian:-EB} %{mlittle-endian:-EL}" \
    SUBTARGET_EXTRA_LINK_SPEC