My changes to address arch= functionality. It is incomplete, but very close (I believe) Validation is happening.

ChangeLog

@@ -1,3 +1,16 @@
+2024-06-18  Kyrylo Tkachov  <ktkachov@nvidia.com>
+
+	* MAINTAINERS (aarch64 port): Update my email address.
+	(DCO section): Likewise.
+
+2024-06-11  Arthur Cohen  <arthur.cohen@embecosm.com>
+
+	* Makefile.tpl: Add CRAB1_LIBS variable.
+	* Makefile.in: Regenerate.
+	* configure: Regenerate.
+	* configure.ac: Check if -ldl and -lpthread are needed, and if so, add
+	them to CRAB1_LIBS.
+
 2024-05-31  Pengxuan Zheng  <quic_pzheng@quicinc.com>
 
 	* MAINTAINERS: Add myself to Write After Approval and DCO.

MAINTAINERS

@@ -52,14 +52,14 @@ docs, and the testsuite related to that.
 aarch64 port		Richard Earnshaw	<richard.earnshaw@arm.com>
 aarch64 port		Richard Sandiford	<richard.sandiford@arm.com>
 aarch64 port		Marcus Shawcroft	<marcus.shawcroft@arm.com>
-aarch64 port		Kyrylo Tkachov		<ktkachov@gcc.gnu.org>
+aarch64 port		Kyrylo Tkachov		<ktkachov@nvidia.com>
 alpha port		Richard Henderson	<rth@gcc.gnu.org>
 amdgcn port		Julian Brown		<julian@codesourcery.com>
 amdgcn port		Andrew Stubbs		<ams@baylibre.com>
 arc port		Claudiu Zissulescu	<claziss@synopsys.com>
 arm port		Nick Clifton		<nickc@redhat.com>
 arm port		Richard Earnshaw	<richard.earnshaw@arm.com>
-arm port		Ramana Radhakrishnan	<ramana.gcc@gmail.com>
+arm port		Ramana Radhakrishnan	<ramanara@nvidia.com>
 avr port		Denis Chertykov		<chertykov@gmail.com>
 bfin port		Jie Zhang		<jzhang918@gmail.com>
 bpf port		Jose E. Marchesi	<jose.marchesi@oracle.com>
@@ -776,6 +776,7 @@ Immad Mir					<mir@sourceware.org>
 Gaius Mulley					<gaiusmod2@gmail.com>
 Andrew Pinski					<quic_apinski@quicinc.com>
 Siddhesh Poyarekar				<siddhesh@gotplt.org>
+Ramana Radhakrishnan				<ramanara@nvidia.com>
 Navid Rahimi					<navidrahimi@microsoft.com>
 Rishi Raj						<rishiraj45035@gmail.com>
 Trevor Saunders					<tbsaunde+gcc@tbsaunde.org>
@@ -784,7 +785,7 @@ Nathaniel Shead					<nathanieloshead@gmail.org>
 Nathan Sidwell					<nathan@acm.org>
 Edward Smith-Rowland				<esmithrowland@gmail.com>
 Fangrui Song	                                <maskray@gcc.gnu.org>
-Kyrylo Tkachov					<ktkachov@gcc.gnu.org>
+Kyrylo Tkachov					<ktkachov@nvidia.com>
 Petter Tomner					<tomner@bahnhof.se>
 Martin Uecker					<uecker@gcc.gnu.org>
 Jonathan Wakely					<jwakely@redhat.com>

Makefile.in

@@ -197,6 +197,7 @@ HOST_EXPORTS = \
 	$(BASE_EXPORTS) \
 	CC="$(CC)"; export CC; \
 	ADA_CFLAGS="$(ADA_CFLAGS)"; export ADA_CFLAGS; \
+	CRAB1_LIBS="$(CRAB1_LIBS)"; export CRAB1_LIBS; \
 	CFLAGS="$(CFLAGS)"; export CFLAGS; \
 	CONFIG_SHELL="$(SHELL)"; export CONFIG_SHELL; \
 	CXX="$(CXX)"; export CXX; \
@@ -450,6 +451,8 @@ GOCFLAGS = $(CFLAGS)
 GDCFLAGS = @GDCFLAGS@
 GM2FLAGS = $(CFLAGS)
 
+CRAB1_LIBS = @CRAB1_LIBS@
+
 PKG_CONFIG_PATH = @PKG_CONFIG_PATH@
 
 GUILE = guile

Makefile.tpl

@@ -200,6 +200,7 @@ HOST_EXPORTS = \
 	$(BASE_EXPORTS) \
 	CC="$(CC)"; export CC; \
 	ADA_CFLAGS="$(ADA_CFLAGS)"; export ADA_CFLAGS; \
+	CRAB1_LIBS="$(CRAB1_LIBS)"; export CRAB1_LIBS; \
 	CFLAGS="$(CFLAGS)"; export CFLAGS; \
 	CONFIG_SHELL="$(SHELL)"; export CONFIG_SHELL; \
 	CXX="$(CXX)"; export CXX; \
@@ -453,6 +454,8 @@ GOCFLAGS = $(CFLAGS)
 GDCFLAGS = @GDCFLAGS@
 GM2FLAGS = $(CFLAGS)
 
+CRAB1_LIBS = @CRAB1_LIBS@
+
 PKG_CONFIG_PATH = @PKG_CONFIG_PATH@
 
 GUILE = guile

configure

@@ -690,6 +690,7 @@ extra_host_zlib_configure_flags
 extra_host_libiberty_configure_flags
 stage1_languages
 host_libs_picflag
+CRAB1_LIBS
 PICFLAG
 host_shared
 gcc_host_pie
@@ -8875,6 +8876,139 @@ fi
 
 
 
+# Rust requires -ldl and -lpthread if you are using an old glibc that does not include them by
+# default, so we check for them here
+
+missing_rust_dynlibs=none
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing dlopen" >&5
+$as_echo_n "checking for library containing dlopen... " >&6; }
+if ${ac_cv_search_dlopen+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_func_search_save_LIBS=$LIBS
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char dlopen ();
+int
+main ()
+{
+return dlopen ();
+  ;
+  return 0;
+}
+_ACEOF
+for ac_lib in '' dl; do
+  if test -z "$ac_lib"; then
+    ac_res="none required"
+  else
+    ac_res=-l$ac_lib
+    LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
+  fi
+  if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_search_dlopen=$ac_res
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext
+  if ${ac_cv_search_dlopen+:} false; then :
+  break
+fi
+done
+if ${ac_cv_search_dlopen+:} false; then :
+
+else
+  ac_cv_search_dlopen=no
+fi
+rm conftest.$ac_ext
+LIBS=$ac_func_search_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_dlopen" >&5
+$as_echo "$ac_cv_search_dlopen" >&6; }
+ac_res=$ac_cv_search_dlopen
+if test "$ac_res" != no; then :
+  test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
+
+fi
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing pthread_create" >&5
+$as_echo_n "checking for library containing pthread_create... " >&6; }
+if ${ac_cv_search_pthread_create+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_func_search_save_LIBS=$LIBS
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char pthread_create ();
+int
+main ()
+{
+return pthread_create ();
+  ;
+  return 0;
+}
+_ACEOF
+for ac_lib in '' pthread; do
+  if test -z "$ac_lib"; then
+    ac_res="none required"
+  else
+    ac_res=-l$ac_lib
+    LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
+  fi
+  if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_search_pthread_create=$ac_res
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext
+  if ${ac_cv_search_pthread_create+:} false; then :
+  break
+fi
+done
+if ${ac_cv_search_pthread_create+:} false; then :
+
+else
+  ac_cv_search_pthread_create=no
+fi
+rm conftest.$ac_ext
+LIBS=$ac_func_search_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_pthread_create" >&5
+$as_echo "$ac_cv_search_pthread_create" >&6; }
+ac_res=$ac_cv_search_pthread_create
+if test "$ac_res" != no; then :
+  test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
+
+fi
+
+
+if test "$ac_cv_search_dlopen" = -ldl; then
+    CRAB1_LIBS="$CRAB1_LIBS -ldl"
+elif test "$ac_cv_search_dlopen" = no; then
+    missing_rust_dynlibs="libdl"
+fi
+
+if test "$ac_cv_search_pthread_create" = -lpthread; then
+    CRAB1_LIBS="$CRAB1_LIBS -lpthread"
+elif test "$ac_cv_search_pthread_create" = no; then
+    missing_rust_dynlibs="$missing_rust_dynlibs, libpthread"
+fi
+
+CRAB1_LIBS="$CRAB1_LIBS"
+
+
 # If we are building PIC/PIE host executables, and we are building dependent
 # libs (e.g. GMP) in-tree those libs need to be configured to generate PIC
 # code.
@@ -9115,6 +9249,26 @@ $as_echo "$as_me: WARNING: GDC is required to build $language" >&2;}
             ;;
         esac
 
+        # Disable Rust if we are missing some required C libraries for the Rust runtime.
+        case ${add_this_lang}:${language}:${missing_rust_dynlibs} in
+          *:rust:none)
+            # Nothing to do - we're not missing any C libraries
+            ;;
+          yes:rust:*)
+            as_fn_error $? "some C libraries are required to build $language: $missing_rust_dynlibs" "$LINENO" 5
+            add_this_lang=unsupported
+            ;;
+          all:rust:*)
+            { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: some C libraries are required to build $language: $missing_rust_dynlibs" >&5
+$as_echo "$as_me: WARNING: some C libraries are required to build $language: $missing_rust_dynlibs" >&2;}
+            add_this_lang=unsupported
+            ;;
+          *:rust:*)
+            # Silently disable.
+            add_this_lang=unsupported
+            ;;
+        esac
+
         # Disable jit if -enable-host-shared not specified
         # but not if building for Mingw. All code in Windows
         # is position independent code (PIC).
@@ -19592,7 +19746,7 @@ config.status
 configured by $0, generated by GNU Autoconf 2.69,
   with options \\"\$ac_cs_config\\"
 
-Copyright (C) 2012 Free Software Foundation, Inc.
+Copyright (C)  Free Software Foundation, Inc.
 This config.status script is free software; the Free Software Foundation
 gives unlimited permission to copy, distribute and modify it."
 

configure.ac

@@ -2037,6 +2037,28 @@ fi
 
 AC_SUBST(PICFLAG)
 
+# Rust requires -ldl and -lpthread if you are using an old glibc that does not include them by
+# default, so we check for them here
+
+missing_rust_dynlibs=none
+
+AC_SEARCH_LIBS([dlopen], [dl])
+AC_SEARCH_LIBS([pthread_create], [pthread])
+
+if test "$ac_cv_search_dlopen" = -ldl; then
+    CRAB1_LIBS="$CRAB1_LIBS -ldl"
+elif test "$ac_cv_search_dlopen" = no; then
+    missing_rust_dynlibs="libdl"
+fi
+
+if test "$ac_cv_search_pthread_create" = -lpthread; then
+    CRAB1_LIBS="$CRAB1_LIBS -lpthread"
+elif test "$ac_cv_search_pthread_create" = no; then
+    missing_rust_dynlibs="$missing_rust_dynlibs, libpthread"
+fi
+
+AC_SUBST(CRAB1_LIBS, "$CRAB1_LIBS")
+
 # If we are building PIC/PIE host executables, and we are building dependent
 # libs (e.g. GMP) in-tree those libs need to be configured to generate PIC
 # code.
@@ -2274,6 +2296,25 @@ if test -d ${srcdir}/gcc; then
             ;;
         esac
 
+        # Disable Rust if we are missing some required C libraries for the Rust runtime.
+        case ${add_this_lang}:${language}:${missing_rust_dynlibs} in
+          *:rust:none)
+            # Nothing to do - we're not missing any C libraries
+            ;;
+          yes:rust:*)
+            AC_MSG_ERROR([some C libraries are required to build $language: $missing_rust_dynlibs])
+            add_this_lang=unsupported
+            ;;
+          all:rust:*)
+            AC_MSG_WARN([some C libraries are required to build $language: $missing_rust_dynlibs])
+            add_this_lang=unsupported
+            ;;
+          *:rust:*)
+            # Silently disable.
+            add_this_lang=unsupported
+            ;;
+        esac
+
         # Disable jit if -enable-host-shared not specified
         # but not if building for Mingw. All code in Windows
         # is position independent code (PIC).

fixincludes/ChangeLog

@@ -1,3 +1,16 @@
+2024-06-11  Francois-Xavier Coudert  <fxcoudert@gcc.gnu.org>
+
+	* fixincl.x: Regenerate.
+	* inclhack.def (math_exception): Bypass on __cplusplus.
+	* tests/base/math.h: Regenerate.
+
+2024-06-07  Francois-Xavier Coudert  <fxcoudert@gcc.gnu.org>
+
+	* fixincl.x: Regenerate.
+	* inclhack.def (darwin_stdint_7, darwin_dispatch_object_1,
+	darwin_os_trace_2, darwin_os_base_1): Include bypasses
+	for recent headers, fixed by Apple.
+
 2024-05-07  Zac Walker  <zacwalker@microsoft.com>
 
 	* mkfixinc.sh: Extend for *-mingw32* targets.