From 75d1a35180cf0967f062765314bf091a64032062 Mon Sep 17 00:00:00 2001 From: Ariadne Conill Date: Fri, 21 Aug 2020 06:46:56 +0000 Subject: [PATCH] On linux targets pass --as-needed by default to the linker, but always link the sanitizer libraries with --no-as-needed. --- gcc/config/aarch64/aarch64-linux.h | 1 + gcc/config/alpha/linux-elf.h | 2 +- gcc/config/arm/linux-elf.h | 1 + gcc/config/gnu-user.h | 6 +++--- gcc/config/i386/gnu-user.h | 2 +- gcc/config/i386/gnu-user64.h | 1 + gcc/config/ia64/linux.h | 2 +- gcc/config/mips/gnu-user.h | 1 + gcc/config/riscv/linux.h | 1 + gcc/config/rs6000/linux64.h | 4 ++-- gcc/config/rs6000/sysv4.h | 2 +- gcc/config/s390/linux.h | 2 +- gcc/config/sparc/linux.h | 2 +- gcc/gcc.cc | 28 ++++++++++++++++++++-------- 14 files changed, 36 insertions(+), 19 deletions(-) diff --git a/gcc/config/aarch64/aarch64-linux.h b/gcc/config/aarch64/aarch64-linux.h index 5e4553d79f5..b516f3ef97f 100644 --- a/gcc/config/aarch64/aarch64-linux.h +++ b/gcc/config/aarch64/aarch64-linux.h @@ -35,6 +35,7 @@ #define CPP_SPEC "%{pthread:-D_REENTRANT}" #define LINUX_TARGET_LINK_SPEC "%{h*} \ + --as-needed \ %{static:-Bstatic} \ %{shared:-shared} \ %{symbolic:-Bsymbolic} \ diff --git a/gcc/config/alpha/linux-elf.h b/gcc/config/alpha/linux-elf.h index 17f16a55910..9ec667e9a5e 100644 --- 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. If not see #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: \ diff --git a/gcc/config/arm/linux-elf.h b/gcc/config/arm/linux-elf.h index df3da67c4f0..7532bc29f9b 100644 --- a/gcc/config/arm/linux-elf.h +++ b/gcc/config/arm/linux-elf.h @@ -70,6 +70,7 @@ %{rdynamic:-export-dynamic} \ %{!shared:-dynamic-linker " GNU_USER_DYNAMIC_LINKER "}} \ -X \ + --as-needed \ %{mbig-endian:-EB} %{mlittle-endian:-EL}" \ SUBTARGET_EXTRA_LINK_SPEC diff --git a/gcc/config/gnu-user.h b/gcc/config/gnu-user.h index 857c0e077bf..8433e56c3e1 100644 --- a/gcc/config/gnu-user.h +++ b/gcc/config/gnu-user.h @@ -136,7 +136,7 @@ see the files COPYING3 and COPYING.RUNTIME respectively. If not, see #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 LIBHWASAN_EARLY_SPEC #define LIBHWASAN_EARLY_SPEC "%{static-libhwasan:%{!shared:" \ LD_STATIC_OPTION " --whole-archive -lhwasan --no-whole-archive " \ @@ -145,12 +145,12 @@ see the files COPYING3 and COPYING.RUNTIME respectively. If not, see #define LIBTSAN_EARLY_SPEC "%{!shared:libtsan_preinit%O%s} " \ "%{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 "%{!shared:liblsan_preinit%O%s} " \ "%{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 #undef TARGET_F951_OPTIONS diff --git a/gcc/config/i386/gnu-user.h b/gcc/config/i386/gnu-user.h index 0102b2a6f3b..994414c1845 100644 --- a/gcc/config/i386/gnu-user.h +++ b/gcc/config/i386/gnu-user.h @@ -68,7 +68,7 @@ along with GCC; see the file COPYING3. If not see { "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: \ %{!static-pie: \ diff --git a/gcc/config/i386/gnu-user64.h b/gcc/config/i386/gnu-user64.h index abc8cf624ca..fe656aeae27 100644 --- a/gcc/config/i386/gnu-user64.h +++ b/gcc/config/i386/gnu-user64.h @@ -56,6 +56,7 @@ see the files COPYING3 and COPYING.RUNTIME respectively. If not, see "%{" SPEC_64 ":-m " GNU_USER_LINK_EMULATION64 "} \ %{" SPEC_32 ":-m " GNU_USER_LINK_EMULATION32 "} \ %{" SPEC_X32 ":-m " GNU_USER_LINK_EMULATIONX32 "} \ + --as-needed \ %{shared:-shared} \ %{!shared: \ %{!static: \ diff --git a/gcc/config/ia64/linux.h b/gcc/config/ia64/linux.h index 93510098ccc..3813e536423 100644 --- 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: \ diff --git a/gcc/config/mips/gnu-user.h b/gcc/config/mips/gnu-user.h index 6aad7192e69..e1256a55add 100644 --- 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. If not see #undef GNU_USER_TARGET_LINK_SPEC #define GNU_USER_TARGET_LINK_SPEC "\ %{G*} %{EB} %{EL} %{mips*} %{shared} \ + -as-needed \ %{!shared: \ %{!static: \ %{rdynamic:-export-dynamic} \ diff --git a/gcc/config/riscv/linux.h b/gcc/config/riscv/linux.h index 38803723ba9..3067ed6eac8 100644 --- a/gcc/config/riscv/linux.h +++ b/gcc/config/riscv/linux.h @@ -58,6 +58,7 @@ along with GCC; see the file COPYING3. If not see "%{mabi=ilp32:_ilp32}" #define LINK_SPEC "\ +-as-needed \ -melf" XLEN_SPEC DEFAULT_ENDIAN_SPEC "riscv" LD_EMUL_SUFFIX " \ %{mno-relax:--no-relax} \ %{mbig-endian:-EB} \ diff --git a/gcc/config/rs6000/linux64.h b/gcc/config/rs6000/linux64.h index b2a7afabc73..34ceb4e4fce 100644 --- a/gcc/config/rs6000/linux64.h +++ b/gcc/config/rs6000/linux64.h @@ -377,13 +377,13 @@ 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: \ %{!static-pie: \ %{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: \ %{!static-pie: \ %{rdynamic:-export-dynamic} \ -dynamic-linker " GNU_USER_DYNAMIC_LINKER64 "}}} \ diff --git a/gcc/config/rs6000/sysv4.h b/gcc/config/rs6000/sysv4.h index 7e2519de5d4..61215a7a1b3 100644 --- a/gcc/config/rs6000/sysv4.h +++ b/gcc/config/rs6000/sysv4.h @@ -788,7 +788,7 @@ GNU_USER_TARGET_CC1_SPEC #define GNU_USER_DYNAMIC_LINKER GLIBC_DYNAMIC_LINKER #endif -#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 "}}" diff --git a/gcc/config/s390/linux.h b/gcc/config/s390/linux.h index d7b7e7a7b02..d2287f14f2e 100644 --- a/gcc/config/s390/linux.h +++ b/gcc/config/s390/linux.h @@ -82,7 +82,7 @@ along with GCC; see the file COPYING3. If not see #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} \ diff --git a/gcc/config/sparc/linux.h b/gcc/config/sparc/linux.h index 6a809e9092d..93bfb92d3ff 100644 --- a/gcc/config/sparc/linux.h +++ b/gcc/config/sparc/linux.h @@ -81,7 +81,7 @@ extern const char *host_detect_local_cpu (int argc, const char **argv); #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: \ diff --git a/gcc/gcc.cc b/gcc/gcc.cc index d18b5d7b59a..3b76311b544 100644 --- a/gcc/gcc.cc +++ b/gcc/gcc.cc @@ -744,8 +744,11 @@ proper position among the other output files. */ #ifdef LIBASAN_EARLY_SPEC #define LIBASAN_SPEC STATIC_LIBASAN_LIBS #elif defined(HAVE_LD_STATIC_DYNAMIC) -#define LIBASAN_SPEC "%{static-libasan:" LD_STATIC_OPTION \ - "} -lasan %{static-libasan:" LD_DYNAMIC_OPTION "}" \ +#define LIBASAN_SPEC "%{static-libasan:" LD_STATIC_OPTION "}" \ + " %{!static-libasan:%{!fuse-ld=gold:--push-state }--no-as-needed}" \ + " -lasan " \ + " %{static-libasan:" LD_DYNAMIC_OPTION "}" \ + " %{!static-libasan:%{fuse-ld=gold:--as-needed;:--pop-state}}" \ STATIC_LIBASAN_LIBS #else #define LIBASAN_SPEC "-lasan" STATIC_LIBASAN_LIBS @@ -780,8 +783,11 @@ proper position among the other output files. */ #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 @@ -798,8 +804,11 @@ proper position among the other output files. */ #ifdef LIBLSAN_EARLY_SPEC #define LIBLSAN_SPEC STATIC_LIBLSAN_LIBS #elif defined(HAVE_LD_STATIC_DYNAMIC) -#define LIBLSAN_SPEC "%{static-liblsan:" LD_STATIC_OPTION \ - "} -llsan %{static-liblsan:" LD_DYNAMIC_OPTION "}" \ +#define LIBLSAN_SPEC "%{static-liblsan:" LD_STATIC_OPTION "}" \ + " %{!static-liblsan:%{!fuse-ld=gold:--push-state }--no-as-needed}" \ + " -llsan " \ + " %{static-liblsan:" LD_DYNAMIC_OPTION "}" \ + " %{!static-liblsan:%{fuse-ld=gold:--as-needed;:--pop-state}}" \ STATIC_LIBLSAN_LIBS #else #define LIBLSAN_SPEC "-llsan" STATIC_LIBLSAN_LIBS @@ -814,8 +823,11 @@ proper position among the other output files. */ #define STATIC_LIBUBSAN_LIBS \ " %{static-libubsan|static:%:include(libsanitizer.spec)%(link_libubsan)}" #ifdef HAVE_LD_STATIC_DYNAMIC -#define LIBUBSAN_SPEC "%{static-libubsan:" LD_STATIC_OPTION \ - "} -lubsan %{static-libubsan:" LD_DYNAMIC_OPTION "}" \ +#define LIBUBSAN_SPEC "%{static-libubsan:" LD_STATIC_OPTION "}" \ + " %{!static-libubsan:%{!fuse-ld=gold:--push-state }--no-as-needed}" \ + " -lubsan " \ + " %{static-libubsan:" LD_DYNAMIC_OPTION "}" \ + " %{!static-libubsan:%{fuse-ld=gold:--as-needed;:--pop-state}}" \ STATIC_LIBUBSAN_LIBS #else #define LIBUBSAN_SPEC "-lubsan" STATIC_LIBUBSAN_LIBS