Provide __start_minfo/__stop_minfo for linkers that don't (PR d/87864)

	libphobos:
	PR d/87864
	* configure.ac (DRTSTUFF_SPEC): New variable.
	Substitute it.
	* libdruntime/m4/druntime/os.m4 (DRUNTIME_OS_MINFO_BRACKETING):
	New automake conditional.
	* configure: Regenerate.
	* libdruntime/gcc/drtstuff.c: New file.
	* libdruntime/Makefile.am [!DRUNTIME_OS_MINFO_BRACKETING]
	(DRTSTUFF, toolexeclib_DATA): New variables.
	(gcc/drtbegin.lo, gcc/drtend.lo): New rules.
	(libgdruntime_la_LDFLAGS): Use -Wc instead of -Xcompiler.
	Add -dstartfiles -B../src -Bgcc.
	(libgdruntime_la_DEPENDENCIES): New variable.
	(unittest_static_LDFLAGS): Use -Wc instead of -Xcompiler.
	(libgdruntime_t_la_LDFLAGS): Likewise.
	(unittest_LDFLAGS): Likewise.
	* src/Makefile.am (libgphobos_la_LDFLAGS): Use -Wc instead of
	-Xcompiler.
	Add -dstartfiles -B../libdruntime/gcc.
	(unittest_static_LDFLAGS): Use -Wc instead of -Xcompiler.
	(libgphobos_t_la_LDFLAGS): Likewise.
	(unittest_LDFLAGS): Likewise.
	* libdruntime/Makefile.in, src/Makefile.in: Regenerate.
	* Makefile.in, testsuite/Makefile.in: Regenerate.
	* libdruntime/rt/sections_elf_shared.d (Minfo_Bracketing): Don't
	assert.
	* libdruntime/gcc/config.d.in (Minfo_Bracketing): Remove.
	* src/drtstuff.spec: New file.
	* src/libgphobos.spec.in (DRTSTUFF_SPEC): Substitute.
	(*lib): Only pass SPEC_PHOBOS_DEPS without -debuglib, -defaultlib,
	-nophoboslib.
	* testsuite/testsuite_flags.in <--gdcldflags> (GDCLDFLAGS): Add
	-B${BUILD_DIR}/libdruntime/gcc.

	gcc/d:
	PR d/87864
	* lang.opt (dstartfiles): New option.
	* d-spec.cc (need_spec): New variable.
	(lang_specific_driver) <OPT_dstartfiles>: Enable need_spec.
	(lang_specific_pre_link): Also load libgphobos.spec if need_spec.

	gcc/testsuite:
	PR d/87864
	* lib/gdc.exp (gdc_link_flags): Add path to drtbegin.o/drtend.o if
	present.

From-SVN: r268886

5 files changed, 114 insertions, 24 deletions

diff --git a/libphobos/libdruntime/Makefile.am b/libphobos/libdruntime/Makefile.am
index 8fa0ac104ef..eca6c4a56fd 100644
--- a/libphobos/libdruntime/Makefile.am
+++ b/libphobos/libdruntime/Makefile.am
@@ -74,6 +74,20 @@ endif
 if DRUNTIME_OS_SOLARIS
     ALL_DRUNTIME_COMPILE_DSOURCES += $(DRUNTIME_DSOURCES_SOLARIS)
 endif
+
+# Provide __start_minfo, __stop_minfo if linker doesn't.
+if !DRUNTIME_OS_MINFO_BRACKETING
+    DRTSTUFF = gcc/drtbegin.o gcc/drtend.o
+
+    toolexeclib_DATA = $(DRTSTUFF)
+
+gcc/drtbegin.o: gcc/drtstuff.c
+	$(COMPILE) -DDRT_BEGIN -c -o $@ $<
+
+gcc/drtend.o: gcc/drtstuff.c
+	$(COMPILE) -DDRT_END -c -o $@ $<
+endif
+
 # Generated by configure
 ALL_DRUNTIME_COMPILE_DSOURCES += $(DRUNTIME_DSOURCES_GENERATED)
 
@@ -95,14 +109,16 @@ endif
 toolexeclib_LTLIBRARIES = libgdruntime.la
 libgdruntime_la_SOURCES = $(ALL_DRUNTIME_SOURCES)
 libgdruntime_la_LIBTOOLFLAGS =
-libgdruntime_la_LDFLAGS = -Xcompiler -nophoboslib -version-info $(libtool_VERSION)
+libgdruntime_la_LDFLAGS = -Wc,-nophoboslib,-dstartfiles,-B../src,-Bgcc \
+    -version-info $(libtool_VERSION)
 libgdruntime_la_LIBADD = $(LIBATOMIC) $(LIBBACKTRACE)
+libgdruntime_la_DEPENDENCIES = $(DRTSTUFF)
 
 # For static unittest, link objects directly
 unittest_static_SOURCES = ../testsuite/test_runner.d $(DRUNTIME_CSOURCES) \
     $(DRUNTIME_SSOURCES)
 unittest_static_LIBTOOLFLAGS =
-unittest_static_LDFLAGS = -Xcompiler -nophoboslib
+unittest_static_LDFLAGS = -Wc,-nophoboslib
 unittest_static_LDADD = $(DRUNTIME_TEST_OBJECTS) $(LIBATOMIC) $(LIBBACKTRACE)
 EXTRA_unittest_static_DEPENDENCIES = $(DRUNTIME_TEST_OBJECTS)
 
@@ -111,14 +127,14 @@ libgdruntime_t_la_SOURCES = $(DRUNTIME_CSOURCES) $(DRUNTIME_SSOURCES)
 libgdruntime_t_la_LIBTOOLFLAGS =
 # Automake by default does not generate shared libs for non-installed
 # libraries. Use -rpath to force shared lib generation.
-libgdruntime_t_la_LDFLAGS = -Xcompiler -nophoboslib -rpath /foo -shared
+libgdruntime_t_la_LDFLAGS = -Wc,-nophoboslib -rpath /foo -shared
 libgdruntime_t_la_LIBADD = $(DRUNTIME_TEST_LOBJECTS) $(LIBATOMIC) $(LIBBACKTRACE)
 EXTRA_libgdruntime_t_la_DEPENDENCIES = $(DRUNTIME_TEST_LOBJECTS)
 
 # For unittest
 unittest_SOURCES = ../testsuite/test_runner.d
 unittest_LIBTOOLFLAGS =
-unittest_LDFLAGS = -Xcompiler -nophoboslib
+unittest_LDFLAGS = -Wc,-nophoboslib
 unittest_LDADD = libgdruntime_t.la
 
 # Extra install and clean rules.
diff --git a/libphobos/libdruntime/Makefile.in b/libphobos/libdruntime/Makefile.in
index 89daa1c08ff..02331af95bd 100644
--- a/libphobos/libdruntime/Makefile.in
+++ b/libphobos/libdruntime/Makefile.in
@@ -31,6 +31,7 @@
 # along with GCC; see the file COPYING3.  If not see
 # <http://www.gnu.org/licenses/>.
 
+
 VPATH = @srcdir@
 am__is_gnu_make = { \
   if test -z '$(MAKELEVEL)'; then \
@@ -172,11 +173,10 @@ am__uninstall_files_from_dir = { \
     || { echo " ( cd '$$dir' && rm -f" $$files ")"; \
          $(am__cd) "$$dir" && rm -f $$files; }; \
   }
-am__installdirs = "$(DESTDIR)$(toolexeclibdir)"
+am__installdirs = "$(DESTDIR)$(toolexeclibdir)" \
+	"$(DESTDIR)$(toolexeclibdir)"
 LTLIBRARIES = $(toolexeclib_LTLIBRARIES)
 am__DEPENDENCIES_1 =
-libgdruntime_la_DEPENDENCIES = $(am__DEPENDENCIES_1) \
-	$(am__DEPENDENCIES_1)
 am__dirstamp = $(am__leading_dot)dirstamp
 am__objects_1 = core/atomic.lo core/attribute.lo core/bitop.lo \
 	core/checkedint.lo core/cpuid.lo core/demangle.lo \
@@ -1052,6 +1052,7 @@ am__can_run_installinfo = \
     n|no|NO) false;; \
     *) (install-info --version) >/dev/null 2>&1;; \
   esac
+DATA = $(toolexeclib_DATA)
 am__tagged_files = $(HEADERS) $(SOURCES) $(TAGS_FILES) $(LISP)
 # Read a list of newline-separated strings from the standard input,
 # and print each of them once, without duplicates.  Input order is
@@ -1278,6 +1279,7 @@ ALL_DRUNTIME_INSTALL_DSOURCES = $(DRUNTIME_DSOURCES) \
 
 
 # Setup source files depending on configure
+
 # Generated by configure
 ALL_DRUNTIME_COMPILE_DSOURCES = $(DRUNTIME_DSOURCES) $(am__append_1) \
 	$(am__append_2) $(am__append_3) $(am__append_4) \
@@ -1285,6 +1287,10 @@ ALL_DRUNTIME_COMPILE_DSOURCES = $(DRUNTIME_DSOURCES) $(am__append_1) \
 	$(am__append_8) $(am__append_9) $(am__append_10) \
 	$(am__append_11) $(am__append_12) \
 	$(DRUNTIME_DSOURCES_GENERATED)
+
+# Provide __start_minfo, __stop_minfo if linker doesn't.
+@DRUNTIME_OS_MINFO_BRACKETING_FALSE@DRTSTUFF = gcc/drtbegin.o gcc/drtend.o
+@DRUNTIME_OS_MINFO_BRACKETING_FALSE@toolexeclib_DATA = $(DRTSTUFF)
 ALL_DRUNTIME_SOURCES = $(ALL_DRUNTIME_COMPILE_DSOURCES) $(DRUNTIME_CSOURCES) \
 	$(DRUNTIME_SSOURCES)
 
@@ -1294,15 +1300,18 @@ DRUNTIME_TEST_OBJECTS = $(ALL_DRUNTIME_COMPILE_DSOURCES:.d=.t.o)
 toolexeclib_LTLIBRARIES = libgdruntime.la
 libgdruntime_la_SOURCES = $(ALL_DRUNTIME_SOURCES)
 libgdruntime_la_LIBTOOLFLAGS = 
-libgdruntime_la_LDFLAGS = -Xcompiler -nophoboslib -version-info $(libtool_VERSION)
+libgdruntime_la_LDFLAGS = -Wc,-nophoboslib,-dstartfiles,-B../src,-Bgcc \
+    -version-info $(libtool_VERSION)
+
 libgdruntime_la_LIBADD = $(LIBATOMIC) $(LIBBACKTRACE)
+libgdruntime_la_DEPENDENCIES = $(DRTSTUFF)
 
 # For static unittest, link objects directly
 unittest_static_SOURCES = ../testsuite/test_runner.d $(DRUNTIME_CSOURCES) \
     $(DRUNTIME_SSOURCES)
 
 unittest_static_LIBTOOLFLAGS = 
-unittest_static_LDFLAGS = -Xcompiler -nophoboslib
+unittest_static_LDFLAGS = -Wc,-nophoboslib
 unittest_static_LDADD = $(DRUNTIME_TEST_OBJECTS) $(LIBATOMIC) $(LIBBACKTRACE)
 EXTRA_unittest_static_DEPENDENCIES = $(DRUNTIME_TEST_OBJECTS)
 
@@ -1311,14 +1320,14 @@ libgdruntime_t_la_SOURCES = $(DRUNTIME_CSOURCES) $(DRUNTIME_SSOURCES)
 libgdruntime_t_la_LIBTOOLFLAGS = 
 # Automake by default does not generate shared libs for non-installed
 # libraries. Use -rpath to force shared lib generation.
-libgdruntime_t_la_LDFLAGS = -Xcompiler -nophoboslib -rpath /foo -shared
+libgdruntime_t_la_LDFLAGS = -Wc,-nophoboslib -rpath /foo -shared
 libgdruntime_t_la_LIBADD = $(DRUNTIME_TEST_LOBJECTS) $(LIBATOMIC) $(LIBBACKTRACE)
 EXTRA_libgdruntime_t_la_DEPENDENCIES = $(DRUNTIME_TEST_LOBJECTS)
 
 # For unittest
 unittest_SOURCES = ../testsuite/test_runner.d
 unittest_LIBTOOLFLAGS = 
-unittest_LDFLAGS = -Xcompiler -nophoboslib
+unittest_LDFLAGS = -Wc,-nophoboslib
 unittest_LDADD = libgdruntime_t.la
 DRUNTIME_DSOURCES_GENERATED = gcc/config.d gcc/libbacktrace.d
 # Source file definitions. Boring stuff, auto-generated with
@@ -2454,6 +2463,27 @@ clean-libtool:
 	-rm -rf rt/typeinfo/.libs rt/typeinfo/_libs
 	-rm -rf rt/util/.libs rt/util/_libs
 	-rm -rf rt/util/container/.libs rt/util/container/_libs
+install-toolexeclibDATA: $(toolexeclib_DATA)
+	@$(NORMAL_INSTALL)
+	@list='$(toolexeclib_DATA)'; test -n "$(toolexeclibdir)" || list=; \
+	if test -n "$$list"; then \
+	  echo " $(MKDIR_P) '$(DESTDIR)$(toolexeclibdir)'"; \
+	  $(MKDIR_P) "$(DESTDIR)$(toolexeclibdir)" || exit 1; \
+	fi; \
+	for p in $$list; do \
+	  if test -f "$$p"; then d=; else d="$(srcdir)/"; fi; \
+	  echo "$$d$$p"; \
+	done | $(am__base_list) | \
+	while read files; do \
+	  echo " $(INSTALL_DATA) $$files '$(DESTDIR)$(toolexeclibdir)'"; \
+	  $(INSTALL_DATA) $$files "$(DESTDIR)$(toolexeclibdir)" || exit $$?; \
+	done
+
+uninstall-toolexeclibDATA:
+	@$(NORMAL_UNINSTALL)
+	@list='$(toolexeclib_DATA)'; test -n "$(toolexeclibdir)" || list=; \
+	files=`for p in $$list; do echo $$p; done | sed -e 's|^.*/||'`; \
+	dir='$(DESTDIR)$(toolexeclibdir)'; $(am__uninstall_files_from_dir)
 
 ID: $(am__tagged_files)
 	$(am__define_uniq_tagged_files); mkid -fID $$unique
@@ -2509,9 +2539,9 @@ distclean-tags:
 check-am: all-am
 	$(MAKE) $(AM_MAKEFLAGS) $(check_LTLIBRARIES) $(check_PROGRAMS)
 check: check-am
-all-am: Makefile $(LTLIBRARIES)
+all-am: Makefile $(LTLIBRARIES) $(DATA)
 installdirs:
-	for dir in "$(DESTDIR)$(toolexeclibdir)"; do \
+	for dir in "$(DESTDIR)$(toolexeclibdir)" "$(DESTDIR)$(toolexeclibdir)"; do \
 	  test -z "$$dir" || $(MKDIR_P) "$$dir"; \
 	done
 install: install-am
@@ -2614,7 +2644,8 @@ install-dvi: install-dvi-am
 
 install-dvi-am:
 
-install-exec-am: install-toolexeclibLTLIBRARIES
+install-exec-am: install-toolexeclibDATA \
+	install-toolexeclibLTLIBRARIES
 
 install-html: install-html-am
 
@@ -2653,7 +2684,8 @@ ps: ps-am
 
 ps-am:
 
-uninstall-am: uninstall-toolexeclibLTLIBRARIES
+uninstall-am: uninstall-toolexeclibDATA \
+	uninstall-toolexeclibLTLIBRARIES
 
 .MAKE: check-am install-am install-strip
 
@@ -2667,11 +2699,12 @@ uninstall-am: uninstall-toolexeclibLTLIBRARIES
 	install-exec install-exec-am install-html install-html-am \
 	install-info install-info-am install-man install-pdf \
 	install-pdf-am install-ps install-ps-am install-strip \
-	install-toolexeclibLTLIBRARIES installcheck installcheck-am \
-	installdirs maintainer-clean maintainer-clean-generic \
-	mostlyclean mostlyclean-compile mostlyclean-generic \
-	mostlyclean-libtool pdf pdf-am ps ps-am tags tags-am uninstall \
-	uninstall-am uninstall-toolexeclibLTLIBRARIES
+	install-toolexeclibDATA install-toolexeclibLTLIBRARIES \
+	installcheck installcheck-am installdirs maintainer-clean \
+	maintainer-clean-generic mostlyclean mostlyclean-compile \
+	mostlyclean-generic mostlyclean-libtool pdf pdf-am ps ps-am \
+	tags tags-am uninstall uninstall-am uninstall-toolexeclibDATA \
+	uninstall-toolexeclibLTLIBRARIES
 
 .PRECIOUS: Makefile
 
@@ -2695,6 +2728,12 @@ uninstall-am: uninstall-toolexeclibLTLIBRARIES
 %.t.o : %.t.lo
 	@:
 
+@DRUNTIME_OS_MINFO_BRACKETING_FALSE@gcc/drtbegin.o: gcc/drtstuff.c
+@DRUNTIME_OS_MINFO_BRACKETING_FALSE@	$(COMPILE) -DDRT_BEGIN -c -o $@ $<
+
+@DRUNTIME_OS_MINFO_BRACKETING_FALSE@gcc/drtend.o: gcc/drtstuff.c
+@DRUNTIME_OS_MINFO_BRACKETING_FALSE@	$(COMPILE) -DDRT_END -c -o $@ $<
+
 # Extra install and clean rules.
 # This does not delete the .libs/.t.o files, but deleting
 # the .lo is good enough to rerun the rules
diff --git a/libphobos/libdruntime/gcc/config.d.in b/libphobos/libdruntime/gcc/config.d.in
index 3a1d493f3c4..1b5d5d9b692 100644
--- a/libphobos/libdruntime/gcc/config.d.in
+++ b/libphobos/libdruntime/gcc/config.d.in
@@ -35,9 +35,6 @@ enum ThreadModel
 
 enum ThreadModel GNU_Thread_Model = ThreadModel.@DCFG_THREAD_MODEL@;
 
-// Whether the linker provides __start_minfo and __stop_minfo symbols
-enum Minfo_Bracketing = @DCFG_MINFO_BRACKETING@;
-
 // Whether target has support for builtin atomics.
 enum GNU_Have_Atomics = @DCFG_HAVE_ATOMIC_BUILTINS@;
 
diff --git a/libphobos/libdruntime/gcc/drtstuff.c b/libphobos/libdruntime/gcc/drtstuff.c
new file mode 100644
index 00000000000..40edda3bffb
--- /dev/null
+++ b/libphobos/libdruntime/gcc/drtstuff.c
@@ -0,0 +1,39 @@
+/* Provide minfo section bracketing for D executables and shared libraries
+   when the linker doesn't provide it.
+   Copyright (C) 2019 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/>.  */
+
+/* Avoid interference with targets without support for named sections.  */
+#ifdef __ELF__
+
+#ifdef DRT_BEGIN
+void *__start_minfo[]
+__attribute__((used, section("minfo"), aligned(sizeof(void *)))) = { };
+#endif
+
+#ifdef DRT_END
+void *__stop_minfo[]
+__attribute__((used, section("minfo"), aligned(sizeof(void *)))) = { };
+#endif
+
+#endif /* __ELF__ */
diff --git a/libphobos/libdruntime/rt/sections_elf_shared.d b/libphobos/libdruntime/rt/sections_elf_shared.d
index 3f43bbd7663..d4e1ff07699 100644
--- a/libphobos/libdruntime/rt/sections_elf_shared.d
+++ b/libphobos/libdruntime/rt/sections_elf_shared.d
@@ -335,7 +335,6 @@ else
 ///////////////////////////////////////////////////////////////////////////////
 
 import gcc.config;
-static assert(Minfo_Bracketing, "Can't use _d_dso_registry interface");
 
 /*
  * This data structure is generated by the compiler, and then passed to