2020-08-21 10:18:02 +00:00
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From 872e0a15a2b74cd6b6ba58e2e7e1605543ea36bd Mon Sep 17 00:00:00 2001
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From: Ariadne Conill <ariadne@dereferenced.org>
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Date: Fri, 21 Aug 2020 06:46:56 +0000
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2020-08-24 11:15:45 +00:00
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Subject: [PATCH 05/30] On linux targets pass --as-needed by default to the
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2020-08-21 10:18:02 +00:00
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linker, but always link the sanitizer libraries with --no-as-needed.
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2017-06-14 17:10:21 +00:00
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2020-08-21 10:18:02 +00:00
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---
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gcc/config/aarch64/aarch64-linux.h | 1 +
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gcc/config/alpha/linux-elf.h | 2 +-
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gcc/config/arm/linux-elf.h | 1 +
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gcc/config/gnu-user.h | 6 +++---
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gcc/config/i386/gnu-user.h | 2 +-
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gcc/config/i386/gnu-user64.h | 1 +
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gcc/config/ia64/linux.h | 2 +-
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gcc/config/mips/gnu-user.h | 1 +
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gcc/config/riscv/linux.h | 1 +
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gcc/config/rs6000/linux64.h | 4 ++--
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gcc/config/rs6000/sysv4.h | 2 +-
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gcc/config/s390/linux.h | 2 +-
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gcc/config/sparc/linux.h | 2 +-
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gcc/gcc.c | 28 ++++++++++++++++++++--------
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14 files changed, 36 insertions(+), 19 deletions(-)
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diff --git a/gcc/config/aarch64/aarch64-linux.h b/gcc/config/aarch64/aarch64-linux.h
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index e587e2e9ad6..1d1017aa523 100644
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--- a/gcc/config/aarch64/aarch64-linux.h
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+++ b/gcc/config/aarch64/aarch64-linux.h
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@@ -35,6 +35,7 @@
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#define CPP_SPEC "%{pthread:-D_REENTRANT}"
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#define LINUX_TARGET_LINK_SPEC "%{h*} \
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+ --as-needed \
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%{static:-Bstatic} \
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%{shared:-shared} \
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%{symbolic:-Bsymbolic} \
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diff --git a/gcc/config/alpha/linux-elf.h b/gcc/config/alpha/linux-elf.h
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index e25fcac3c59..22b2f7b0d14 100644
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--- a/gcc/config/alpha/linux-elf.h
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+++ b/gcc/config/alpha/linux-elf.h
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@@ -37,7 +37,7 @@ along with GCC; see the file COPYING3. If not see
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#define ELF_DYNAMIC_LINKER GNU_USER_DYNAMIC_LINKER
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-#define LINK_SPEC "-m elf64alpha %{G*} %{relax:-relax} \
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+#define LINK_SPEC "-m elf64alpha --as-needed %{G*} %{relax:-relax} \
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%{O*:-O3} %{!O*:-O1} \
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%{shared:-shared} \
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%{!shared: \
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diff --git a/gcc/config/arm/linux-elf.h b/gcc/config/arm/linux-elf.h
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index 0ec3aa53189..f8bda84de2a 100644
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--- a/gcc/config/arm/linux-elf.h
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+++ b/gcc/config/arm/linux-elf.h
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@@ -70,6 +70,7 @@
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%{rdynamic:-export-dynamic} \
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%{!shared:-dynamic-linker " GNU_USER_DYNAMIC_LINKER "}} \
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-X \
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+ --as-needed \
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%{mbig-endian:-EB} %{mlittle-endian:-EL}" \
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SUBTARGET_EXTRA_LINK_SPEC
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diff --git a/gcc/config/gnu-user.h b/gcc/config/gnu-user.h
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index ff2e880b1fa..7f30c363e4a 100644
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2017-06-14 17:10:21 +00:00
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--- a/gcc/config/gnu-user.h
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+++ b/gcc/config/gnu-user.h
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2020-08-21 10:18:02 +00:00
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@@ -136,17 +136,17 @@ see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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2017-06-14 17:10:21 +00:00
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#define LIBASAN_EARLY_SPEC "%{!shared:libasan_preinit%O%s} " \
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"%{static-libasan:%{!shared:" \
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LD_STATIC_OPTION " --whole-archive -lasan --no-whole-archive " \
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- LD_DYNAMIC_OPTION "}}%{!static-libasan:-lasan}"
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+ LD_DYNAMIC_OPTION "}}%{!static-libasan:%{!fuse-ld=gold:--push-state} --no-as-needed -lasan %{fuse-ld=gold:--as-needed;:--pop-state}}"
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#undef LIBTSAN_EARLY_SPEC
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2018-09-27 17:15:08 +00:00
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#define LIBTSAN_EARLY_SPEC "%{!shared:libtsan_preinit%O%s} " \
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"%{static-libtsan:%{!shared:" \
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2017-06-14 17:10:21 +00:00
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LD_STATIC_OPTION " --whole-archive -ltsan --no-whole-archive " \
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- LD_DYNAMIC_OPTION "}}%{!static-libtsan:-ltsan}"
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+ LD_DYNAMIC_OPTION "}}%{!static-libtsan:%{!fuse-ld=gold:--push-state} --no-as-needed -ltsan %{fuse-ld=gold:--as-needed;:--pop-state}}"
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#undef LIBLSAN_EARLY_SPEC
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2018-09-27 17:15:08 +00:00
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#define LIBLSAN_EARLY_SPEC "%{!shared:liblsan_preinit%O%s} " \
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"%{static-liblsan:%{!shared:" \
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2017-06-14 17:10:21 +00:00
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LD_STATIC_OPTION " --whole-archive -llsan --no-whole-archive " \
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- LD_DYNAMIC_OPTION "}}%{!static-liblsan:-llsan}"
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+ LD_DYNAMIC_OPTION "}}%{!static-liblsan:%{!fuse-ld=gold:--push-state} --no-as-needed -llsan %{fuse-ld=gold:--as-needed;:--pop-state}}"
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#endif
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2020-08-21 10:18:02 +00:00
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#undef TARGET_F951_OPTIONS
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diff --git a/gcc/config/i386/gnu-user.h b/gcc/config/i386/gnu-user.h
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index ae4aa844f02..54b91c0492a 100644
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--- a/gcc/config/i386/gnu-user.h
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+++ b/gcc/config/i386/gnu-user.h
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@@ -74,7 +74,7 @@ along with GCC; see the file COPYING3. If not see
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{ "link_emulation", GNU_USER_LINK_EMULATION },\
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{ "dynamic_linker", GNU_USER_DYNAMIC_LINKER }
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-#define GNU_USER_TARGET_LINK_SPEC "-m %(link_emulation) %{shared:-shared} \
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+#define GNU_USER_TARGET_LINK_SPEC "-m %(link_emulation) --as-needed %{shared:-shared} \
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%{!shared: \
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%{!static: \
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%{!static-pie: \
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diff --git a/gcc/config/i386/gnu-user64.h b/gcc/config/i386/gnu-user64.h
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index 785c68220b8..21dd66b412a 100644
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--- a/gcc/config/i386/gnu-user64.h
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+++ b/gcc/config/i386/gnu-user64.h
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@@ -56,6 +56,7 @@ see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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"%{" SPEC_64 ":-m " GNU_USER_LINK_EMULATION64 "} \
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%{" SPEC_32 ":-m " GNU_USER_LINK_EMULATION32 "} \
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%{" SPEC_X32 ":-m " GNU_USER_LINK_EMULATIONX32 "} \
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+ --as-needed \
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%{shared:-shared} \
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%{!shared: \
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%{!static: \
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diff --git a/gcc/config/ia64/linux.h b/gcc/config/ia64/linux.h
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index ee38e218aec..0325971d818 100644
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2017-06-14 17:10:21 +00:00
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--- a/gcc/config/ia64/linux.h
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+++ b/gcc/config/ia64/linux.h
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@@ -58,7 +58,7 @@ do { \
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#define GLIBC_DYNAMIC_LINKER "/lib/ld-linux-ia64.so.2"
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#undef LINK_SPEC
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-#define LINK_SPEC "\
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+#define LINK_SPEC " --as-needed \
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%{shared:-shared} \
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%{!shared: \
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%{!static: \
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2020-08-21 10:18:02 +00:00
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diff --git a/gcc/config/mips/gnu-user.h b/gcc/config/mips/gnu-user.h
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index 5d0782100bb..4be5fbb2191 100644
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--- a/gcc/config/mips/gnu-user.h
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+++ b/gcc/config/mips/gnu-user.h
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@@ -55,6 +55,7 @@ along with GCC; see the file COPYING3. If not see
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#undef GNU_USER_TARGET_LINK_SPEC
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#define GNU_USER_TARGET_LINK_SPEC "\
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%{G*} %{EB} %{EL} %{mips*} %{shared} \
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+ -as-needed \
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2017-06-14 17:10:21 +00:00
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%{!shared: \
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%{!static: \
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2020-08-21 10:18:02 +00:00
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%{rdynamic:-export-dynamic} \
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diff --git a/gcc/config/riscv/linux.h b/gcc/config/riscv/linux.h
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index 4afef7c228c..ba1a6e60e05 100644
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--- a/gcc/config/riscv/linux.h
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+++ b/gcc/config/riscv/linux.h
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@@ -58,6 +58,7 @@ along with GCC; see the file COPYING3. If not see
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"%{mabi=ilp32:_ilp32}"
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2017-06-14 17:10:21 +00:00
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2020-08-21 10:18:02 +00:00
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#define LINK_SPEC "\
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+-as-needed \
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-melf" XLEN_SPEC "lriscv" LD_EMUL_SUFFIX " \
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%{mno-relax:--no-relax} \
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%{shared} \
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diff --git a/gcc/config/rs6000/linux64.h b/gcc/config/rs6000/linux64.h
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index 2ded3301282..a1e44ddcc0d 100644
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2017-06-14 17:10:21 +00:00
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--- a/gcc/config/rs6000/linux64.h
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+++ b/gcc/config/rs6000/linux64.h
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2020-08-21 10:18:02 +00:00
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@@ -457,13 +457,13 @@ extern int dot_symbols;
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2017-06-14 17:10:21 +00:00
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" -m elf64ppc")
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#endif
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-#define LINK_OS_LINUX_SPEC32 LINK_OS_LINUX_EMUL32 " %{!shared: %{!static: \
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+#define LINK_OS_LINUX_SPEC32 LINK_OS_LINUX_EMUL32 " --as-needed %{!shared: %{!static: \
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2018-09-27 17:15:08 +00:00
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%{!static-pie: \
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%{rdynamic:-export-dynamic} \
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-dynamic-linker " GNU_USER_DYNAMIC_LINKER32 "}}} \
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2017-06-14 17:10:21 +00:00
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%(link_os_extra_spec32)"
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-#define LINK_OS_LINUX_SPEC64 LINK_OS_LINUX_EMUL64 " %{!shared: %{!static: \
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+#define LINK_OS_LINUX_SPEC64 LINK_OS_LINUX_EMUL64 " --as-needed %{!shared: %{!static: \
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2018-09-27 17:15:08 +00:00
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%{!static-pie: \
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%{rdynamic:-export-dynamic} \
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-dynamic-linker " GNU_USER_DYNAMIC_LINKER64 "}}} \
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2020-08-21 10:18:02 +00:00
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diff --git a/gcc/config/rs6000/sysv4.h b/gcc/config/rs6000/sysv4.h
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index 9ade72114e9..9490b84a153 100644
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2017-06-14 17:10:21 +00:00
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--- a/gcc/config/rs6000/sysv4.h
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+++ b/gcc/config/rs6000/sysv4.h
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2020-08-21 10:18:02 +00:00
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@@ -789,7 +789,7 @@ GNU_USER_TARGET_CC1_SPEC
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#define GNU_USER_DYNAMIC_LINKER GLIBC_DYNAMIC_LINKER
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#endif
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2017-06-14 17:10:21 +00:00
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-#define LINK_OS_LINUX_SPEC "-m elf32ppclinux %{!shared: %{!static: \
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+#define LINK_OS_LINUX_SPEC "-m elf32ppclinux --as-needed %{!shared: %{!static: \
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%{rdynamic:-export-dynamic} \
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-dynamic-linker " GNU_USER_DYNAMIC_LINKER "}}"
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2020-08-21 10:18:02 +00:00
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diff --git a/gcc/config/s390/linux.h b/gcc/config/s390/linux.h
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index 6919b468f06..56d52d41b31 100644
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--- a/gcc/config/s390/linux.h
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+++ b/gcc/config/s390/linux.h
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@@ -82,7 +82,7 @@ along with GCC; see the file COPYING3. If not see
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2017-06-14 17:10:21 +00:00
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2020-08-21 10:18:02 +00:00
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#undef LINK_SPEC
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#define LINK_SPEC \
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- "%{m31:-m elf_s390}%{m64:-m elf64_s390} \
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+ "%{m31:-m elf_s390}%{m64:-m elf64_s390} --as-needed \
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%{shared:-shared} \
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%{!shared: \
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%{static:-static} \
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diff --git a/gcc/config/sparc/linux.h b/gcc/config/sparc/linux.h
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index 81201e67a2f..6477d7ec52e 100644
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--- a/gcc/config/sparc/linux.h
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+++ b/gcc/config/sparc/linux.h
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@@ -87,7 +87,7 @@ extern const char *host_detect_local_cpu (int argc, const char **argv);
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#define GLIBC_DYNAMIC_LINKER "/lib/ld-linux.so.2"
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2017-06-14 17:10:21 +00:00
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2020-08-21 10:18:02 +00:00
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#undef LINK_SPEC
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-#define LINK_SPEC "-m elf32_sparc %{shared:-shared} \
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+#define LINK_SPEC "-m elf32_sparc --as-needed %{shared:-shared} \
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%{!mno-relax:%{!r:-relax}} \
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2017-06-14 17:10:21 +00:00
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%{!shared: \
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%{!static: \
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2020-08-21 10:18:02 +00:00
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diff --git a/gcc/gcc.c b/gcc/gcc.c
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index 625c9ab7902..7aec9d3a016 100644
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--- a/gcc/gcc.c
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+++ b/gcc/gcc.c
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@@ -695,8 +695,11 @@ proper position among the other output files. */
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#ifdef LIBASAN_EARLY_SPEC
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#define LIBASAN_SPEC STATIC_LIBASAN_LIBS
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#elif defined(HAVE_LD_STATIC_DYNAMIC)
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-#define LIBASAN_SPEC "%{static-libasan:" LD_STATIC_OPTION \
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- "} -lasan %{static-libasan:" LD_DYNAMIC_OPTION "}" \
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+#define LIBASAN_SPEC "%{static-libasan:" LD_STATIC_OPTION "}" \
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+ " %{!static-libasan:%{!fuse-ld=gold:--push-state }--no-as-needed}" \
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+ " -lasan " \
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+ " %{static-libasan:" LD_DYNAMIC_OPTION "}" \
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+ " %{!static-libasan:%{fuse-ld=gold:--as-needed;:--pop-state}}" \
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STATIC_LIBASAN_LIBS
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#else
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#define LIBASAN_SPEC "-lasan" STATIC_LIBASAN_LIBS
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@@ -713,8 +716,11 @@ proper position among the other output files. */
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#ifdef LIBTSAN_EARLY_SPEC
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#define LIBTSAN_SPEC STATIC_LIBTSAN_LIBS
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#elif defined(HAVE_LD_STATIC_DYNAMIC)
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-#define LIBTSAN_SPEC "%{static-libtsan:" LD_STATIC_OPTION \
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- "} -ltsan %{static-libtsan:" LD_DYNAMIC_OPTION "}" \
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+#define LIBTSAN_SPEC "%{static-libtsan:" LD_STATIC_OPTION "}" \
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+ " %{!static-libtsan:%{!fuse-ld=gold:--push-state }--no-as-needed}" \
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+ " -ltsan " \
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+ " %{static-libtsan:" LD_DYNAMIC_OPTION "}" \
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+ " %{!static-libtsan:%{fuse-ld=gold:--as-needed;:--pop-state}}" \
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STATIC_LIBTSAN_LIBS
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#else
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#define LIBTSAN_SPEC "-ltsan" STATIC_LIBTSAN_LIBS
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@@ -731,8 +737,11 @@ proper position among the other output files. */
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#ifdef LIBLSAN_EARLY_SPEC
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#define LIBLSAN_SPEC STATIC_LIBLSAN_LIBS
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#elif defined(HAVE_LD_STATIC_DYNAMIC)
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-#define LIBLSAN_SPEC "%{static-liblsan:" LD_STATIC_OPTION \
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- "} -llsan %{static-liblsan:" LD_DYNAMIC_OPTION "}" \
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+#define LIBLSAN_SPEC "%{static-liblsan:" LD_STATIC_OPTION "}" \
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+ " %{!static-liblsan:%{!fuse-ld=gold:--push-state }--no-as-needed}" \
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+ " -llsan " \
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+ " %{static-liblsan:" LD_DYNAMIC_OPTION "}" \
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+ " %{!static-liblsan:%{fuse-ld=gold:--as-needed;:--pop-state}}" \
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STATIC_LIBLSAN_LIBS
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#else
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#define LIBLSAN_SPEC "-llsan" STATIC_LIBLSAN_LIBS
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@@ -747,8 +756,11 @@ proper position among the other output files. */
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#define STATIC_LIBUBSAN_LIBS \
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" %{static-libubsan|static:%:include(libsanitizer.spec)%(link_libubsan)}"
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#ifdef HAVE_LD_STATIC_DYNAMIC
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-#define LIBUBSAN_SPEC "%{static-libubsan:" LD_STATIC_OPTION \
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- "} -lubsan %{static-libubsan:" LD_DYNAMIC_OPTION "}" \
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+#define LIBUBSAN_SPEC "%{static-libubsan:" LD_STATIC_OPTION "}" \
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+ " %{!static-libubsan:%{!fuse-ld=gold:--push-state }--no-as-needed}" \
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+ " -lubsan " \
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+ " %{static-libubsan:" LD_DYNAMIC_OPTION "}" \
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+ " %{!static-libubsan:%{fuse-ld=gold:--as-needed;:--pop-state}}" \
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STATIC_LIBUBSAN_LIBS
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#else
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#define LIBUBSAN_SPEC "-lubsan" STATIC_LIBUBSAN_LIBS
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--
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2.27.0
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