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path: root/community/gcc6/005_all_default-as-needed.patch
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# DP: On linux targets pass --as-needed by default to the linker, but always
# DP: link the sanitizer libraries with --no-as-needed.

--- a/gcc/gcc.c
+++ b/gcc/gcc.c
@@ -568,8 +568,11 @@ proper position among the other output f
 #ifdef LIBTSAN_EARLY_SPEC
 #define LIBTSAN_SPEC STATIC_LIBTSAN_LIBS
 #elif defined(HAVE_LD_STATIC_DYNAMIC)
-#define LIBTSAN_SPEC "%{static-libtsan:" LD_STATIC_OPTION \
-		     "} -ltsan %{static-libtsan:" LD_DYNAMIC_OPTION "}" \
+#define LIBTSAN_SPEC "%{static-libtsan:" LD_STATIC_OPTION "}" \
+		     " %{!static-libtsan:%{!fuse-ld=gold:--push-state }--no-as-needed}" \
+		     " -ltsan " \
+		     " %{static-libtsan:" LD_DYNAMIC_OPTION "}" \
+		     " %{!static-libtsan:%{fuse-ld=gold:--as-needed;:--pop-state}}" \
 		     STATIC_LIBTSAN_LIBS
 #else
 #define LIBTSAN_SPEC "-ltsan" STATIC_LIBTSAN_LIBS
--- a/gcc/config/gnu-user.h
+++ b/gcc/config/gnu-user.h
@@ -124,13 +124,13 @@
 #define LIBASAN_EARLY_SPEC "%{!shared:libasan_preinit%O%s} " \
   "%{static-libasan:%{!shared:" \
   LD_STATIC_OPTION " --whole-archive -lasan --no-whole-archive " \
-  LD_DYNAMIC_OPTION "}}%{!static-libasan:-lasan}"
+  LD_DYNAMIC_OPTION "}}%{!static-libasan:%{!fuse-ld=gold:--push-state} --no-as-needed -lasan %{fuse-ld=gold:--as-needed;:--pop-state}}"
 #undef LIBTSAN_EARLY_SPEC
 #define LIBTSAN_EARLY_SPEC "%{static-libtsan:%{!shared:" \
   LD_STATIC_OPTION " --whole-archive -ltsan --no-whole-archive " \
-  LD_DYNAMIC_OPTION "}}%{!static-libtsan:-ltsan}"
+  LD_DYNAMIC_OPTION "}}%{!static-libtsan:%{!fuse-ld=gold:--push-state} --no-as-needed -ltsan %{fuse-ld=gold:--as-needed;:--pop-state}}"
 #undef LIBLSAN_EARLY_SPEC
 #define LIBLSAN_EARLY_SPEC "%{static-liblsan:%{!shared:" \
   LD_STATIC_OPTION " --whole-archive -llsan --no-whole-archive " \
-  LD_DYNAMIC_OPTION "}}%{!static-liblsan:-llsan}"
+  LD_DYNAMIC_OPTION "}}%{!static-liblsan:%{!fuse-ld=gold:--push-state} --no-as-needed -llsan %{fuse-ld=gold:--as-needed;:--pop-state}}"
 #endif
Index: b/gcc/config/aarch64/aarch64-linux.h
===================================================================
--- a/gcc/config/aarch64/aarch64-linux.h
+++ b/gcc/config/aarch64/aarch64-linux.h
@@ -36,5 +36,6 @@
 
 #define LINUX_TARGET_LINK_SPEC  "%{h*}		\
+   --as-needed					\
    %{static:-Bstatic}				\
    %{shared:-shared}				\
    %{symbolic:-Bsymbolic}			\
Index: b/gcc/config/ia64/linux.h
===================================================================
--- a/gcc/config/ia64/linux.h
+++ b/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 "\
+#define LINK_SPEC " --as-needed \
   %{shared:-shared} \
   %{!shared: \
     %{!static: \
Index: b/gcc/config/sparc/linux.h
===================================================================
--- a/gcc/config/sparc/linux.h
+++ b/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 %{shared:-shared} \
+#define LINK_SPEC "-m elf32_sparc --as-needed %{shared:-shared} \
   %{!mno-relax:%{!r:-relax}} \
   %{!shared: \
     %{!static: \
Index: b/gcc/config/s390/linux.h
===================================================================
--- a/gcc/config/s390/linux.h
+++ b/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} \
+  "%{m31:-m elf_s390}%{m64:-m elf64_s390} --as-needed \
    %{shared:-shared} \
    %{!shared: \
       %{static:-static} \
Index: b/gcc/config/rs6000/linux64.h
===================================================================
--- a/gcc/config/rs6000/linux64.h
+++ b/gcc/config/rs6000/linux64.h
@@ -466,12 +466,12 @@ extern int dot_symbols;
 					   " -m elf64ppc")
 #endif
 
-#define LINK_OS_LINUX_SPEC32 LINK_OS_LINUX_EMUL32 " %{!shared: %{!static: \
+#define LINK_OS_LINUX_SPEC32 LINK_OS_LINUX_EMUL32 " --as-needed %{!shared: %{!static: \
   %{rdynamic:-export-dynamic} \
   -dynamic-linker " GNU_USER_DYNAMIC_LINKER32 "}} \
   %(link_os_extra_spec32)"
 
-#define LINK_OS_LINUX_SPEC64 LINK_OS_LINUX_EMUL64 " %{!shared: %{!static: \
+#define LINK_OS_LINUX_SPEC64 LINK_OS_LINUX_EMUL64 " --as-needed %{!shared: %{!static: \
   %{rdynamic:-export-dynamic} \
   -dynamic-linker " GNU_USER_DYNAMIC_LINKER64 "}} \
   %(link_os_extra_spec64)"
Index: b/gcc/config/rs6000/sysv4.h
===================================================================
--- a/gcc/config/rs6000/sysv4.h
+++ b/gcc/config/rs6000/sysv4.h
@@ -784,7 +784,7 @@ ENDIAN_SELECT(" -mbig", " -mlittle", DEF
   CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER, UCLIBC_DYNAMIC_LINKER, \
 			 MUSL_DYNAMIC_LINKER)
 
-#define LINK_OS_LINUX_SPEC "-m elf32ppclinux %{!shared: %{!static: \
+#define LINK_OS_LINUX_SPEC "-m elf32ppclinux --as-needed %{!shared: %{!static: \
   %{rdynamic:-export-dynamic} \
   -dynamic-linker " GNU_USER_DYNAMIC_LINKER "}}"
 
Index: b/gcc/config/i386/gnu-user64.h
===================================================================
--- a/gcc/config/i386/gnu-user64.h
+++ b/gcc/config/i386/gnu-user64.h
@@ -57,5 +57,6 @@ see the files COPYING3 and COPYING.RUNTI
                    %{" SPEC_32 ":-m " GNU_USER_LINK_EMULATION32 "} \
                    %{" SPEC_X32 ":-m " GNU_USER_LINK_EMULATIONX32 "} \
+  --as-needed \
   %{shared:-shared} \
   %{!shared: \
     %{!static: \
Index: b/gcc/config/i386/gnu-user.h
===================================================================
--- a/gcc/config/i386/gnu-user.h
+++ b/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) %{shared:-shared} \
+#define GNU_USER_TARGET_LINK_SPEC "-m %(link_emulation) --as-needed %{shared:-shared} \
   %{!shared: \
     %{!static: \
       %{rdynamic:-export-dynamic} \
Index: b/gcc/config/alpha/linux-elf.h
===================================================================
--- a/gcc/config/alpha/linux-elf.h
+++ b/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 %{G*} %{relax:-relax}		\
+#define LINK_SPEC "-m elf64alpha --as-needed %{G*} %{relax:-relax}	\
   %{O*:-O3} %{!O*:-O1}						\
   %{shared:-shared}						\
   %{!shared:							\
Index: b/gcc/config/arm/linux-elf.h
===================================================================
--- a/gcc/config/arm/linux-elf.h
+++ b/gcc/config/arm/linux-elf.h
@@ -73,5 +73,6 @@
      %{!shared:-dynamic-linker " GNU_USER_DYNAMIC_LINKER "}} \
    -X \
+   --as-needed \
    %{mbig-endian:-EB} %{mlittle-endian:-EL}" \
    SUBTARGET_EXTRA_LINK_SPEC
 
Index: b/gcc/config/mips/gnu-user.h
===================================================================
--- a/gcc/config/mips/gnu-user.h
+++ b/gcc/config/mips/gnu-user.h
@@ -55,6 +55,7 @@ along with GCC; see the file COPYING3.
 #undef GNU_USER_TARGET_LINK_SPEC
 #define GNU_USER_TARGET_LINK_SPEC "\
   %{G*} %{EB} %{EL} %{mips*} %{shared} \
+  --as-needed \
   %{!shared: \
     %{!static: \
       %{rdynamic:-export-dynamic} \
Index: b/libjava/Makefile.am
===================================================================
--- a/libjava/Makefile.am
+++ b/libjava/Makefile.am
@@ -627,14 +631,14 @@
 	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
 
 ## This rule creates the libgcj_bc library that is actually installed.
 install/libgcj_bc.la: $(libgcj_bc_la_OBJECTS) $(libgcj_bc_la_DEPENDENCIES) install/$(am__dirstamp)
 	$(libgcj_bc_la_LINK) $(am_libgcj_bc_la_rpath) $(libgcj_bc_la_LDFLAGS) \
-	$(libgcj_bc_la_OBJECTS) $(libgcj_bc_la_LIBADD) $(LIBS)
+	$(libgcj_bc_la_OBJECTS) $(libgcj_bc_la_LIBADD) $(LIBS) -Wl,--no-as-needed -lgcj
 
 ## Note that property_files is defined in sources.am.
 propertyo_files = $(patsubst classpath/resource/%,%,$(addsuffix .lo,$(property_files)))
@@ -762,7 +766,7 @@
 	rm $(DESTDIR)$(toolexeclibdir)/libgcj_bc.so; \
 	mv $(DESTDIR)$(toolexeclibdir)/libgcj_bc.so.1.0.0 $(DESTDIR)$(toolexeclibdir)/libgcj_bc.so; \
 	$(libgcj_bc_dummy_LINK) -xc /dev/null -Wl,-soname,libgcj_bc.so.1 \
-	-o $(DESTDIR)$(toolexeclibdir)/libgcj_bc.so.1.0.0 -lgcj || exit; \
+	-o $(DESTDIR)$(toolexeclibdir)/libgcj_bc.so.1.0.0 -Wl,--no-as-needed -lgcj || exit; \
 	rm $(DESTDIR)$(toolexeclibdir)/libgcj_bc.so.1; \
 	$(LN_S) libgcj_bc.so.1.0.0 $(DESTDIR)$(toolexeclibdir)/libgcj_bc.so.1; \
 	rm $(DESTDIR)$(toolexeclibdir)/libgcj_bc.la;
 
Index: b/libjava/Makefile.in
===================================================================
--- a/libjava/Makefile.in
+++ b/libjava/Makefile.in
@@ -10644,13 +10648,13 @@
 	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
 
 install/libgcj_bc.la: $(libgcj_bc_la_OBJECTS) $(libgcj_bc_la_DEPENDENCIES) install/$(am__dirstamp)
 	$(libgcj_bc_la_LINK) $(am_libgcj_bc_la_rpath) $(libgcj_bc_la_LDFLAGS) \
-	$(libgcj_bc_la_OBJECTS) $(libgcj_bc_la_LIBADD) $(LIBS)
+	$(libgcj_bc_la_OBJECTS) $(libgcj_bc_la_LIBADD) $(LIBS) -Wl,--no-as-needed -lgcj
 
 $(propertyo_files): %.lo: classpath/resource/%
 	$(mkinstalldirs) `dirname $@`; \
@@ -12494,7 +12498,7 @@
 @USE_LIBGCJ_BC_TRUE@	rm $(DESTDIR)$(toolexeclibdir)/libgcj_bc.so; \
 @USE_LIBGCJ_BC_TRUE@	mv $(DESTDIR)$(toolexeclibdir)/libgcj_bc.so.1.0.0 $(DESTDIR)$(toolexeclibdir)/libgcj_bc.so; \
 @USE_LIBGCJ_BC_TRUE@	$(libgcj_bc_dummy_LINK) -xc /dev/null -Wl,-soname,libgcj_bc.so.1 \
-@USE_LIBGCJ_BC_TRUE@	-o $(DESTDIR)$(toolexeclibdir)/libgcj_bc.so.1.0.0 -lgcj || exit; \
+@USE_LIBGCJ_BC_TRUE@	-o $(DESTDIR)$(toolexeclibdir)/libgcj_bc.so.1.0.0 -Wl,--no-as-needed -lgcj || exit; \
 @USE_LIBGCJ_BC_TRUE@	rm $(DESTDIR)$(toolexeclibdir)/libgcj_bc.so.1; \
 @USE_LIBGCJ_BC_TRUE@	$(LN_S) libgcj_bc.so.1.0.0 $(DESTDIR)$(toolexeclibdir)/libgcj_bc.so.1; \
 @USE_LIBGCJ_BC_TRUE@	rm $(DESTDIR)$(toolexeclibdir)/libgcj_bc.la;