/usr/src/gcc-4.9/debian/patches/gcc-as-needed.diff is in gcc-4.9-source 4.9.3-13ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 | # 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
@@ -27,6 +27,7 @@
#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
@@ -58,7 +58,7 @@ do { \
#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
@@ -86,7 +86,7 @@ extern const char *host_detect_local_cpu
#define GLIBC_DYNAMIC_LINKER "/lib/ld-linux.so.2"
#undef LINK_SPEC
-#define LINK_SPEC "-m elf32_sparc --hash-style=gnu %{shared:-shared} \
+#define LINK_SPEC "-m elf32_sparc --hash-style=gnu --as-needed %{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
@@ -65,7 +65,7 @@ along with GCC; see the file COPYING3.
#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
@@ -417,11 +417,11 @@ extern int dot_symbols;
" -m elf64ppc")
#endif
-#define LINK_OS_LINUX_SPEC32 LINK_OS_LINUX_EMUL32 " --hash-style=gnu %{!shared: %{!static: \
+#define LINK_OS_LINUX_SPEC32 LINK_OS_LINUX_EMUL32 " --hash-style=gnu --as-needed %{!shared: %{!static: \
%{rdynamic:-export-dynamic} \
-dynamic-linker " GNU_USER_DYNAMIC_LINKER32 "}}"
-#define LINK_OS_LINUX_SPEC64 LINK_OS_LINUX_EMUL64 " --hash-style=gnu %{!shared: %{!static: \
+#define LINK_OS_LINUX_SPEC64 LINK_OS_LINUX_EMUL64 " --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
@@ -773,7 +773,7 @@ ENDIAN_SELECT(" -mbig", " -mlittle", DEF
#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
@@ -57,6 +57,7 @@ see the files COPYING3 and COPYING.RUNTI
%{" 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
@@ -74,7 +74,7 @@ along with GCC; see the file COPYING3.
{ "link_emulation", GNU_USER_LINK_EMULATION },\
{ "dynamic_linker", GNU_USER_DYNAMIC_LINKER }
-#define GNU_USER_TARGET_LINK_SPEC "-m %(link_emulation) --hash-style=gnu %{shared:-shared} \
+#define GNU_USER_TARGET_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
@@ -37,7 +37,7 @@ along with GCC; see the file COPYING3.
#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
@@ -73,6 +73,7 @@
-dynamic-linker " GNU_USER_DYNAMIC_LINKER "} \
-X \
--hash-style=gnu \
+ --as-needed \
%{mbig-endian:-EB} %{mlittle-endian:-EL}" \
SUBTARGET_EXTRA_LINK_SPEC
Index: b/src/gcc/config/mips/gnu-user.h
===================================================================
--- a/src/gcc/config/mips/gnu-user.h
+++ b/src/gcc/config/mips/gnu-user.h
@@ -56,6 +56,7 @@ along with GCC; see the file COPYING3.
#undef GNU_USER_TARGET_LINK_SPEC
#define GNU_USER_TARGET_LINK_SPEC \
"%(endian_spec) \
+ -as-needed \
%{shared:-shared} \
%{!shared: \
%{!static: \
Index: b/src/gcc/config/mips/gnu-user64.h
===================================================================
--- a/src/gcc/config/mips/gnu-user64.h
+++ b/src/gcc/config/mips/gnu-user64.h
@@ -34,6 +34,7 @@ along with GCC; see the file COPYING3.
#define GNU_USER_TARGET_LINK_SPEC "\
%{G*} %{EB} %{EL} %{mips1} %{mips2} %{mips3} %{mips4} \
%{shared} \
+ -as-needed \
%(endian_spec) \
%{!shared: \
%{!static: \
Index: b/src/libjava/Makefile.am
===================================================================
--- a/src/libjava/Makefile.am
+++ b/src/libjava/Makefile.am
@@ -628,7 +628,7 @@ libgcj_bc.la: $(libgcj_bc_la_OBJECTS) $(
rm .libs/libgcj_bc.so; \
mv .libs/libgcj_bc.so.1.0.0 .libs/libgcj_bc.so; \
$(libgcj_bc_dummy_LINK) -xc /dev/null -Wl,-soname,libgcj_bc.so.1 \
- -o .libs/libgcj_bc.so.1.0.0 -lgcj || exit; \
+ -o .libs/libgcj_bc.so.1.0.0 -Wl,--no-as-needed -lgcj || exit; \
rm .libs/libgcj_bc.so.1; \
$(LN_S) libgcj_bc.so.1.0.0 .libs/libgcj_bc.so.1
Index: b/src/libjava/Makefile.in
===================================================================
--- a/src/libjava/Makefile.in
+++ b/src/libjava/Makefile.in
@@ -10600,7 +10600,7 @@ libgcj_bc.la: $(libgcj_bc_la_OBJECTS) $(
rm .libs/libgcj_bc.so; \
mv .libs/libgcj_bc.so.1.0.0 .libs/libgcj_bc.so; \
$(libgcj_bc_dummy_LINK) -xc /dev/null -Wl,-soname,libgcj_bc.so.1 \
- -o .libs/libgcj_bc.so.1.0.0 -lgcj || exit; \
+ -o .libs/libgcj_bc.so.1.0.0 -Wl,--no-as-needed -lgcj || exit; \
rm .libs/libgcj_bc.so.1; \
$(LN_S) libgcj_bc.so.1.0.0 .libs/libgcj_bc.so.1
|