Use CRTs provided by Solaris

	gcc:
	* configure.ac (gcc_cv_solaris_crts): New test.
	* configure. Regenerate.
	* config.in: Regenerate.
	* config/sol2.h (STARTFILE_SPEC): Simplify, provide
	HAVE_SOLARIS_CRTS variant.

	libgcc:
	* configure.ac (libgcc_cv_solaris_crts): New test.
	* configure: Regenerate.
	* config.in: Regenerate.
	* config/sol2/crtp.c, config/sol2/crtpg.c: New files.
	* config/gmon-sol2.c: Rename to ...
	* config/sol2/gmon.c: ... this.
	Include auto-target.h.
	(internal_mcount): Wrap setup handling in !HAVE_SOLARIS_CRTS.
	* config/t-sol2: Rename to ...
	* config/sol2/t-sol2: ... this.
	(gmon.o): Reflect renaming.
	(crtp.o, crtpg.o): New rules.
	* config.host (*-*-solaris2*): Reflect renaming.
	Use system CRTs if present.
	Remove default CRT case.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@228077 138bc75d-0d04-0410-961f-82ee72b054a4

9 files changed, 190 insertions, 16 deletions

diff --git a/libgcc/ChangeLog b/libgcc/ChangeLog
index f4c13aa0077..559f7726f7f 100644
--- a/libgcc/ChangeLog
+++ b/libgcc/ChangeLog
@@ -1,3 +1,21 @@
+2015-09-24  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
+
+	* configure.ac (libgcc_cv_solaris_crts): New test.
+	* configure: Regenerate.
+	* config.in: Regenerate.
+	* config/sol2/crtp.c, config/sol2/crtpg.c: New files.
+	* config/gmon-sol2.c: Rename to ...
+	* config/sol2/gmon.c: ... this.
+	Include auto-target.h.
+	(internal_mcount): Wrap setup handling in !HAVE_SOLARIS_CRTS.
+	* config/t-sol2: Rename to ...
+	* config/sol2/t-sol2: ... this.
+	(gmon.o): Reflect renaming.
+	(crtp.o, crtpg.o): New rules.
+	* config.host (*-*-solaris2*): Reflect renaming.
+	Use system CRTs if present.
+	Remove default CRT case.
+
 2015-09-23  John David Anglin  <danglin@gcc.gnu.org>
 
 	* config/pa/linux-atomic.c (__kernel_cmpxchg2): Reorder error checks.
diff --git a/libgcc/config.host b/libgcc/config.host
index 140aa227c49..6c8b97bfc01 100644
--- a/libgcc/config.host
+++ b/libgcc/config.host
@@ -267,7 +267,7 @@ case ${host} in
 *-*-solaris2*)
   # Unless linker support and dl_iterate_phdr are present,
   # unwind-dw2-fde-dip.c automatically falls back to unwind-dw2-fde.c.
-  tmake_file="$tmake_file t-sol2 t-eh-dw2-dip t-libgcc-pic t-slibgcc t-slibgcc-elf-ver"
+  tmake_file="$tmake_file sol2/t-sol2 t-eh-dw2-dip t-libgcc-pic t-slibgcc t-slibgcc-elf-ver"
   if test $with_gnu_ld = yes; then
     tmake_file="$tmake_file t-slibgcc-gld"
   else
@@ -276,19 +276,22 @@ case ${host} in
   # Add cpu-specific t-sol2 after t-slibgcc-* so it can augment SHLIB_MAPFILES.
   tmake_file="$tmake_file $cpu_type/t-sol2"
   extra_parts="gmon.o crtbegin.o crtend.o"
-  case ${host} in
-    i?86-*-solaris2.1[0-9]* | x86_64-*-solaris2.1[0-9]*)
-      # Solaris 10+/x86 provides crt1.o, crti.o, crtn.o, and gcrt1.o as
-      # part of the base system.
-      ;;
-    sparc*-*-solaris2.1[0-9]*)
-      # Solaris 10+/SPARC lacks crt1.o and gcrt1.o.
-      extra_parts="$extra_parts crt1.o gcrt1.o"
-      ;;
-    *)
-      extra_parts="$extra_parts crt1.o crti.o crtn.o gcrt1.o"
-      ;;
-  esac
+  if test "${libgcc_cv_solaris_crts}" = yes; then
+    # Solaris 11.x and 12 provide crt1.o, crti.o, and crtn.o as part of the
+    # base system.  crtp.o and crtpg.o implement the compiler-dependent parts.
+    extra_parts="$extra_parts crtp.o crtpg.o"
+  else
+    case ${host} in
+      i?86-*-solaris2.1[0-9]* | x86_64-*-solaris2.1[0-9]*)
+        # Solaris 10+/x86 provides crt1.o, crti.o, crtn.o, and gcrt1.o as
+        # part of the base system.
+        ;;
+      sparc*-*-solaris2.1[0-9]*)
+        # Solaris 10+/SPARC lacks crt1.o and gcrt1.o.
+        extra_parts="$extra_parts crt1.o gcrt1.o"
+        ;;
+    esac
+  fi
   ;;
 *-*-uclinux*)
   extra_parts="crtbegin.o crtend.o"
diff --git a/libgcc/config.in b/libgcc/config.in
index 59a79618c0e..25aa0d93bab 100644
--- a/libgcc/config.in
+++ b/libgcc/config.in
@@ -18,6 +18,9 @@
 /* Define to 1 if you have the <memory.h> header file. */
 #undef HAVE_MEMORY_H
 
+/* Define if the system-provided CRTs are present on Solaris. */
+#undef HAVE_SOLARIS_CRTS
+
 /* Define to 1 if you have the <stdint.h> header file. */
 #undef HAVE_STDINT_H
 
diff --git a/libgcc/config/sol2/crtp.c b/libgcc/config/sol2/crtp.c
new file mode 100644
index 00000000000..8b79c55eb90
--- /dev/null
+++ b/libgcc/config/sol2/crtp.c
@@ -0,0 +1,33 @@
+/* Dummy _mcount when mixing profiling and non-profiling objects.
+   Copyright (C) 2015 Free Software Foundation, Inc.
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 3, or (at your option) any later
+version.
+
+GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+Under Section 7 of GPL version 3, you are granted additional
+permissions described in the GCC Runtime Library Exception, version
+3.1, as published by the Free Software Foundation.
+
+You should have received a copy of the GNU General Public License and
+a copy of the GCC Runtime Library Exception along with this program;
+see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+<http://www.gnu.org/licenses/>.  */
+
+void _mcount (void);
+
+/* A dummy profiling support routine for non-profiling executables,
+   in case we link in some objects that have been compiled for profiling.  */
+
+void __attribute__((weak))
+_mcount (void)
+{
+}
diff --git a/libgcc/config/sol2/crtpg.c b/libgcc/config/sol2/crtpg.c
new file mode 100644
index 00000000000..e07a36af937
--- /dev/null
+++ b/libgcc/config/sol2/crtpg.c
@@ -0,0 +1,47 @@
+/* Register profiling startup and cleanup with Solaris CRTs.
+   Copyright (C) 2015 Free Software Foundation, Inc.
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 3, or (at your option) any later
+version.
+
+GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+Under Section 7 of GPL version 3, you are granted additional
+permissions described in the GCC Runtime Library Exception, version
+3.1, as published by the Free Software Foundation.
+
+You should have received a copy of the GNU General Public License and
+a copy of the GCC Runtime Library Exception along with this program;
+see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+<http://www.gnu.org/licenses/>.  */
+
+#include <stdlib.h>
+
+extern void monstartup (char *, char *);
+extern void _mcleanup (void);
+
+extern char _start[], _etext[];
+
+int __start_crt_compiler (int, char **);
+
+/* Since Solaris 11.x and Solaris 12, the system-provided CRTs provide a
+   hook to invoke initialization code early during process startup.
+   __start_crt_compiler is documented in crt1.o(5).  We use it to perform
+   initialization for profiling as a substitute for the earlier separate
+   gcrt1.o.  */
+
+int
+__start_crt_compiler (int argc __attribute__ ((unused)),
+		      char **argv __attribute__ ((unused)))
+{
+  monstartup (_start, _etext);
+  atexit (_mcleanup);
+  return 0;
+}
diff --git a/libgcc/config/gmon-sol2.c b/libgcc/config/sol2/gmon.c
index 7d6149665d0..f6419580a96 100644
--- a/libgcc/config/gmon-sol2.c
+++ b/libgcc/config/sol2/gmon.c
@@ -39,6 +39,7 @@
 
 #include "tconfig.h"
 #include "tsystem.h"
+#include "auto-target.h"
 #include <fcntl.h>		/* For creat.  */
 
 extern void monstartup (char *, char *);
@@ -324,6 +325,11 @@ internal_mcount (char *selfpc, unsigned short *frompcindex)
   frompcindex = (void *) __builtin_return_address (1);
 #endif
 
+/* Only necessary without the Solaris CRTs or a proper gcrt1.o, otherwise
+   crtpg.o or gcrt1.o take care of that.
+
+   FIXME: What about _init vs. _start on sparc?  */
+#ifndef HAVE_SOLARIS_CRTS
   if(!already_setup) {
     extern char etext[];
 
@@ -344,6 +350,7 @@ internal_mcount (char *selfpc, unsigned short *frompcindex)
 #endif
     atexit (_mcleanup);
   }
+#endif /* !HAVE_SOLARIS_CRTS */
   /* Check that we are profiling and that we aren't recursively invoked.  */
   if (profiling) {
     goto out;
diff --git a/libgcc/config/t-sol2 b/libgcc/config/sol2/t-sol2
index 85eddb23635..1f7324af21b 100644
--- a/libgcc/config/t-sol2
+++ b/libgcc/config/sol2/t-sol2
@@ -16,8 +16,14 @@
 # along with GCC; see the file COPYING3.  If not see
 # <http://www.gnu.org/licenses/>.
 
-# gmon build rule:
-gmon.o:	$(srcdir)/config/gmon-sol2.c
+# crtp, crtpg build rules
+crtp.o: $(srcdir)/config/sol2/crtp.c
+	$(gcc_compile) -c $<
+crtpg.o: $(srcdir)/config/sol2/crtpg.c
+	$(gcc_compile) -c $<
+
+# gmon build rule
+gmon.o:	$(srcdir)/config/sol2/gmon.c
 	$(gcc_compile) -c $<
 
 # Assemble startup files.
diff --git a/libgcc/configure b/libgcc/configure
index e22cbcb872a..78708c7f407 100644
--- a/libgcc/configure
+++ b/libgcc/configure
@@ -4665,6 +4665,38 @@ fi
 $as_echo "$libgcc_cv_mips_hard_float" >&6; }
 esac
 
+case ${host} in
+*-*-solaris2*)
+  # Check for system-provided CRTs on Solaris 11.x and Solaris 12.
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking system-provided CRTs on Solaris" >&5
+$as_echo_n "checking system-provided CRTs on Solaris... " >&6; }
+if test "${libgcc_cv_solaris_crts+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  libgcc_cv_solaris_crts=no
+     libgcc_sysroot="`${CC} -print-sysroot`"
+     libgcc_libdir="$libgcc_sysroot/usr/lib"
+     # At the time they were added, gcrt1.o became a symlink for backwards
+     # compatibility on x86, while crt1.o was added on sparc, so check for that.
+     case ${host} in
+       i?86-*-solaris2* | x86_64-*-solaris2*)
+         if test -h "$libgcc_libdir/gcrt1.o"; then libgcc_cv_solaris_crts=yes; fi
+	 ;;
+       sparc*-*-solaris2*)
+         if test -f "$libgcc_libdir/crt1.o"; then libgcc_cv_solaris_crts=yes; fi
+	 ;;
+     esac
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libgcc_cv_solaris_crts" >&5
+$as_echo "$libgcc_cv_solaris_crts" >&6; }
+  if test $libgcc_cv_solaris_crts = yes; then
+
+$as_echo "#define HAVE_SOLARIS_CRTS 1" >>confdefs.h
+
+  fi
+  ;;
+esac
+
 # Determine the version of glibc, if any, used on the target.
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for target glibc version" >&5
 $as_echo_n "checking for target glibc version... " >&6; }
diff --git a/libgcc/configure.ac b/libgcc/configure.ac
index dfabd808d11..9d831a76997 100644
--- a/libgcc/configure.ac
+++ b/libgcc/configure.ac
@@ -292,6 +292,31 @@ mips*-*-*)
     [libgcc_cv_mips_hard_float=no])])
 esac
 
+case ${host} in
+*-*-solaris2*)
+  # Check for system-provided CRTs on Solaris 11.x and Solaris 12.
+  AC_CACHE_CHECK([system-provided CRTs on Solaris],
+    		 [libgcc_cv_solaris_crts],
+    [libgcc_cv_solaris_crts=no
+     libgcc_sysroot="`${CC} -print-sysroot`"
+     libgcc_libdir="$libgcc_sysroot/usr/lib"
+     # At the time they were added, gcrt1.o became a symlink for backwards
+     # compatibility on x86, while crt1.o was added on sparc, so check for that.
+     case ${host} in
+       i?86-*-solaris2* | x86_64-*-solaris2*)
+         if test -h "$libgcc_libdir/gcrt1.o"; then libgcc_cv_solaris_crts=yes; fi
+	 ;;
+       sparc*-*-solaris2*)
+         if test -f "$libgcc_libdir/crt1.o"; then libgcc_cv_solaris_crts=yes; fi
+	 ;;
+     esac])
+  if test $libgcc_cv_solaris_crts = yes; then
+    AC_DEFINE(HAVE_SOLARIS_CRTS, 1,
+      [Define if the system-provided CRTs are present on Solaris.])
+  fi
+  ;;
+esac
+
 # Determine the version of glibc, if any, used on the target.
 AC_MSG_CHECKING([for target glibc version])
 AC_ARG_WITH([glibc-version],