Fix and document -r option

The option has existed and been working for years,
make sure it implies the right extra options, and list
it in the documentation.

2018-09-20  Allan Sandfeld Jensen  <allan.jensen@qt.io>

gcc/
	* gcc.c (LINK_COMMAND_SPEC): Handle -r like -nostdlib.
	(VTABLE_VERIFICATION_SPEC): Likewise.
	(SANITIZER_EARLY_SPEC): Likewise.
	(SANITIZER_SPEC): Likewise.
	* config/darwin.h (LINK_COMMAND_SPEC): Likewise.
	* doc/invoke.texi (Link Options): Document -r.

gcc/cp/
	* g++spec.c (lang_specific_driver): Handle -r like -nostdlib.

gcc/fortran/
	* gfortranspec.c (lang_specific_driver): Handle -r like -nostdlib.

gcc/go/
	* gospec.c (lang_specific_driver): Handle -r like -nostdlib.

gcc/testsuite/
	* g++.dg/ipa/pr64059.C: Removed now redundant -nostdlib.
	* g++.dg/lto/20081109-1_0.C: Likewise.
	* g++.dg/lto/20090302_0.C: Likewise.
	* g++.dg/lto/pr45621_0.C: Likewise.
	* g++.dg/lto/pr60567_0.C: Likewise.
	* g++.dg/lto/pr62026.C: Likewise.
	* gcc.dg/lto/pr45736_0.c: Likewise.
	* gcc.dg/lto/pr52634_0.c: Likewise.
	* gfortran.dg/lto/20091016-1_0.f90: Likewise.
	* gfortran.dg/lto/pr79108_0.f90: Likewise.

From-SVN: r264451

1 files changed, 9 insertions, 9 deletions

diff --git a/gcc/gcc.c b/gcc/gcc.c
index 8be82ea..264204d 100644
--- a/gcc/gcc.c
+++ b/gcc/gcc.c
@@ -980,20 +980,20 @@ proper position among the other output files.  */
 /* Linker command line options for -fsanitize= early on the command line.  */
 #ifndef SANITIZER_EARLY_SPEC
 #define SANITIZER_EARLY_SPEC "\
-%{!nostdlib:%{!nodefaultlibs:%{%:sanitize(address):" LIBASAN_EARLY_SPEC "} \
+%{!nostdlib:%{!r:%{!nodefaultlibs:%{%:sanitize(address):" LIBASAN_EARLY_SPEC "} \
     %{%:sanitize(thread):" LIBTSAN_EARLY_SPEC "} \
-    %{%:sanitize(leak):" LIBLSAN_EARLY_SPEC "}}}"
+    %{%:sanitize(leak):" LIBLSAN_EARLY_SPEC "}}}}"
 #endif
 
 /* Linker command line options for -fsanitize= late on the command line.  */
 #ifndef SANITIZER_SPEC
 #define SANITIZER_SPEC "\
-%{!nostdlib:%{!nodefaultlibs:%{%:sanitize(address):" LIBASAN_SPEC "\
+%{!nostdlib:%{!r:%{!nodefaultlibs:%{%:sanitize(address):" LIBASAN_SPEC "\
     %{static:%ecannot specify -static with -fsanitize=address}}\
     %{%:sanitize(thread):" LIBTSAN_SPEC "\
     %{static:%ecannot specify -static with -fsanitize=thread}}\
     %{%:sanitize(undefined):" LIBUBSAN_SPEC "}\
-    %{%:sanitize(leak):" LIBLSAN_SPEC "}}}"
+    %{%:sanitize(leak):" LIBLSAN_SPEC "}}}}"
 #endif
 
 #ifndef POST_LINK_SPEC
@@ -1007,8 +1007,8 @@ proper position among the other output files.  */
 #ifndef VTABLE_VERIFICATION_SPEC
 #if ENABLE_VTABLE_VERIFY
 #define VTABLE_VERIFICATION_SPEC "\
-%{!nostdlib:%{fvtable-verify=std: -lvtv -u_vtable_map_vars_start -u_vtable_map_vars_end}\
-    %{fvtable-verify=preinit: -lvtv -u_vtable_map_vars_start -u_vtable_map_vars_end}}"
+%{!nostdlib:%{!r:%{fvtable-verify=std: -lvtv -u_vtable_map_vars_start -u_vtable_map_vars_end}\
+    %{fvtable-verify=preinit: -lvtv -u_vtable_map_vars_start -u_vtable_map_vars_end}}}"
 #else
 #define VTABLE_VERIFICATION_SPEC "\
 %{fvtable-verify=none:} \
@@ -1040,7 +1040,7 @@ proper position among the other output files.  */
     %{flto} %{fno-lto} %{flto=*} %l " LINK_PIE_SPEC \
    "%{fuse-ld=*:-fuse-ld=%*} " LINK_COMPRESS_DEBUG_SPEC \
    "%X %{o*} %{e*} %{N} %{n} %{r}\
-    %{s} %{t} %{u*} %{z} %{Z} %{!nostdlib:%{!nostartfiles:%S}} \
+    %{s} %{t} %{u*} %{z} %{Z} %{!nostdlib:%{!r:%{!nostartfiles:%S}}} \
     %{static|no-pie|static-pie:} %@{L*} %(mfwrap) %(link_libgcc) " \
     VTABLE_VERIFICATION_SPEC " " SANITIZER_EARLY_SPEC " %o "" \
     %{fopenacc|fopenmp|%:gt(%{ftree-parallelize-loops=*:%*} 1):\
@@ -1048,8 +1048,8 @@ proper position among the other output files.  */
     %{fgnu-tm:%:include(libitm.spec)%(link_itm)}\
     %(mflib) " STACK_SPLIT_SPEC "\
     %{fprofile-arcs|fprofile-generate*|coverage:-lgcov} " SANITIZER_SPEC " \
-    %{!nostdlib:%{!nodefaultlibs:%(link_ssp) %(link_gcc_c_sequence)}}\
-    %{!nostdlib:%{!nostartfiles:%E}} %{T*}  \n%(post_link) }}}}}}"
+    %{!nostdlib:%{!r:%{!nodefaultlibs:%(link_ssp) %(link_gcc_c_sequence)}}}\
+    %{!nostdlib:%{!r:%{!nostartfiles:%E}}} %{T*}  \n%(post_link) }}}}}}"
 #endif
 
 #ifndef LINK_LIBGCC_SPEC