sim: testsuite: setup per-port toolchain settings for multitarget build

Gas does not support multitarget builds -- it still only supports
a single input & output format.  ld is a bit better, but requires
manual flags to select the right output.  This makes it impossible
to run the complete testsuite in a multitarget build.

To address this limitation, create a suite of FOR_TARGET variables
so these can be set to precompiled as & ld programs.  It requires
a bit of setup ahead of time, but it's a one-time cost, and makes
running the full testsuite at once much easier.

sim/Makefile.in

@@ -1073,6 +1073,38 @@ AMTAR = @AMTAR@
 AM_DEFAULT_VERBOSITY = @AM_DEFAULT_VERBOSITY@
 AR = @AR@
 AR_FOR_BUILD = @AR_FOR_BUILD@
+AS_FOR_TARGET_AARCH64 = @AS_FOR_TARGET_AARCH64@
+AS_FOR_TARGET_ARM = @AS_FOR_TARGET_ARM@
+AS_FOR_TARGET_AVR = @AS_FOR_TARGET_AVR@
+AS_FOR_TARGET_BFIN = @AS_FOR_TARGET_BFIN@
+AS_FOR_TARGET_BPF = @AS_FOR_TARGET_BPF@
+AS_FOR_TARGET_CR16 = @AS_FOR_TARGET_CR16@
+AS_FOR_TARGET_CRIS = @AS_FOR_TARGET_CRIS@
+AS_FOR_TARGET_D10V = @AS_FOR_TARGET_D10V@
+AS_FOR_TARGET_ERC32 = @AS_FOR_TARGET_ERC32@
+AS_FOR_TARGET_EXAMPLE_SYNACOR = @AS_FOR_TARGET_EXAMPLE_SYNACOR@
+AS_FOR_TARGET_FRV = @AS_FOR_TARGET_FRV@
+AS_FOR_TARGET_FT32 = @AS_FOR_TARGET_FT32@
+AS_FOR_TARGET_H8300 = @AS_FOR_TARGET_H8300@
+AS_FOR_TARGET_IQ2000 = @AS_FOR_TARGET_IQ2000@
+AS_FOR_TARGET_LM32 = @AS_FOR_TARGET_LM32@
+AS_FOR_TARGET_M32C = @AS_FOR_TARGET_M32C@
+AS_FOR_TARGET_M32R = @AS_FOR_TARGET_M32R@
+AS_FOR_TARGET_M68HC11 = @AS_FOR_TARGET_M68HC11@
+AS_FOR_TARGET_MCORE = @AS_FOR_TARGET_MCORE@
+AS_FOR_TARGET_MICROBLAZE = @AS_FOR_TARGET_MICROBLAZE@
+AS_FOR_TARGET_MIPS = @AS_FOR_TARGET_MIPS@
+AS_FOR_TARGET_MN10300 = @AS_FOR_TARGET_MN10300@
+AS_FOR_TARGET_MOXIE = @AS_FOR_TARGET_MOXIE@
+AS_FOR_TARGET_MSP430 = @AS_FOR_TARGET_MSP430@
+AS_FOR_TARGET_OR1K = @AS_FOR_TARGET_OR1K@
+AS_FOR_TARGET_PPC = @AS_FOR_TARGET_PPC@
+AS_FOR_TARGET_PRU = @AS_FOR_TARGET_PRU@
+AS_FOR_TARGET_RISCV = @AS_FOR_TARGET_RISCV@
+AS_FOR_TARGET_RL78 = @AS_FOR_TARGET_RL78@
+AS_FOR_TARGET_RX = @AS_FOR_TARGET_RX@
+AS_FOR_TARGET_SH = @AS_FOR_TARGET_SH@
+AS_FOR_TARGET_V850 = @AS_FOR_TARGET_V850@
 AUTOCONF = @AUTOCONF@
 AUTOHEADER = @AUTOHEADER@
 AUTOMAKE = @AUTOMAKE@
@@ -1082,6 +1114,38 @@ CATOBJEXT = @CATOBJEXT@
 CC = @CC@
 CCDEPMODE = @CCDEPMODE@
 CC_FOR_BUILD = @CC_FOR_BUILD@
+CC_FOR_TARGET_AARCH64 = @CC_FOR_TARGET_AARCH64@
+CC_FOR_TARGET_ARM = @CC_FOR_TARGET_ARM@
+CC_FOR_TARGET_AVR = @CC_FOR_TARGET_AVR@
+CC_FOR_TARGET_BFIN = @CC_FOR_TARGET_BFIN@
+CC_FOR_TARGET_BPF = @CC_FOR_TARGET_BPF@
+CC_FOR_TARGET_CR16 = @CC_FOR_TARGET_CR16@
+CC_FOR_TARGET_CRIS = @CC_FOR_TARGET_CRIS@
+CC_FOR_TARGET_D10V = @CC_FOR_TARGET_D10V@
+CC_FOR_TARGET_ERC32 = @CC_FOR_TARGET_ERC32@
+CC_FOR_TARGET_EXAMPLE_SYNACOR = @CC_FOR_TARGET_EXAMPLE_SYNACOR@
+CC_FOR_TARGET_FRV = @CC_FOR_TARGET_FRV@
+CC_FOR_TARGET_FT32 = @CC_FOR_TARGET_FT32@
+CC_FOR_TARGET_H8300 = @CC_FOR_TARGET_H8300@
+CC_FOR_TARGET_IQ2000 = @CC_FOR_TARGET_IQ2000@
+CC_FOR_TARGET_LM32 = @CC_FOR_TARGET_LM32@
+CC_FOR_TARGET_M32C = @CC_FOR_TARGET_M32C@
+CC_FOR_TARGET_M32R = @CC_FOR_TARGET_M32R@
+CC_FOR_TARGET_M68HC11 = @CC_FOR_TARGET_M68HC11@
+CC_FOR_TARGET_MCORE = @CC_FOR_TARGET_MCORE@
+CC_FOR_TARGET_MICROBLAZE = @CC_FOR_TARGET_MICROBLAZE@
+CC_FOR_TARGET_MIPS = @CC_FOR_TARGET_MIPS@
+CC_FOR_TARGET_MN10300 = @CC_FOR_TARGET_MN10300@
+CC_FOR_TARGET_MOXIE = @CC_FOR_TARGET_MOXIE@
+CC_FOR_TARGET_MSP430 = @CC_FOR_TARGET_MSP430@
+CC_FOR_TARGET_OR1K = @CC_FOR_TARGET_OR1K@
+CC_FOR_TARGET_PPC = @CC_FOR_TARGET_PPC@
+CC_FOR_TARGET_PRU = @CC_FOR_TARGET_PRU@
+CC_FOR_TARGET_RISCV = @CC_FOR_TARGET_RISCV@
+CC_FOR_TARGET_RL78 = @CC_FOR_TARGET_RL78@
+CC_FOR_TARGET_RX = @CC_FOR_TARGET_RX@
+CC_FOR_TARGET_SH = @CC_FOR_TARGET_SH@
+CC_FOR_TARGET_V850 = @CC_FOR_TARGET_V850@
 CFLAGS = @CFLAGS@
 CFLAGS_FOR_BUILD = @CFLAGS_FOR_BUILD@
 CGEN_MAINT = @CGEN_MAINT@
@@ -1114,6 +1178,38 @@ INSTOBJEXT = @INSTOBJEXT@
 LD = @LD@
 LDFLAGS = @LDFLAGS@
 LDFLAGS_FOR_BUILD = @LDFLAGS_FOR_BUILD@
+LD_FOR_TARGET_AARCH64 = @LD_FOR_TARGET_AARCH64@
+LD_FOR_TARGET_ARM = @LD_FOR_TARGET_ARM@
+LD_FOR_TARGET_AVR = @LD_FOR_TARGET_AVR@
+LD_FOR_TARGET_BFIN = @LD_FOR_TARGET_BFIN@
+LD_FOR_TARGET_BPF = @LD_FOR_TARGET_BPF@
+LD_FOR_TARGET_CR16 = @LD_FOR_TARGET_CR16@
+LD_FOR_TARGET_CRIS = @LD_FOR_TARGET_CRIS@
+LD_FOR_TARGET_D10V = @LD_FOR_TARGET_D10V@
+LD_FOR_TARGET_ERC32 = @LD_FOR_TARGET_ERC32@
+LD_FOR_TARGET_EXAMPLE_SYNACOR = @LD_FOR_TARGET_EXAMPLE_SYNACOR@
+LD_FOR_TARGET_FRV = @LD_FOR_TARGET_FRV@
+LD_FOR_TARGET_FT32 = @LD_FOR_TARGET_FT32@
+LD_FOR_TARGET_H8300 = @LD_FOR_TARGET_H8300@
+LD_FOR_TARGET_IQ2000 = @LD_FOR_TARGET_IQ2000@
+LD_FOR_TARGET_LM32 = @LD_FOR_TARGET_LM32@
+LD_FOR_TARGET_M32C = @LD_FOR_TARGET_M32C@
+LD_FOR_TARGET_M32R = @LD_FOR_TARGET_M32R@
+LD_FOR_TARGET_M68HC11 = @LD_FOR_TARGET_M68HC11@
+LD_FOR_TARGET_MCORE = @LD_FOR_TARGET_MCORE@
+LD_FOR_TARGET_MICROBLAZE = @LD_FOR_TARGET_MICROBLAZE@
+LD_FOR_TARGET_MIPS = @LD_FOR_TARGET_MIPS@
+LD_FOR_TARGET_MN10300 = @LD_FOR_TARGET_MN10300@
+LD_FOR_TARGET_MOXIE = @LD_FOR_TARGET_MOXIE@
+LD_FOR_TARGET_MSP430 = @LD_FOR_TARGET_MSP430@
+LD_FOR_TARGET_OR1K = @LD_FOR_TARGET_OR1K@
+LD_FOR_TARGET_PPC = @LD_FOR_TARGET_PPC@
+LD_FOR_TARGET_PRU = @LD_FOR_TARGET_PRU@
+LD_FOR_TARGET_RISCV = @LD_FOR_TARGET_RISCV@
+LD_FOR_TARGET_RL78 = @LD_FOR_TARGET_RL78@
+LD_FOR_TARGET_RX = @LD_FOR_TARGET_RX@
+LD_FOR_TARGET_SH = @LD_FOR_TARGET_SH@
+LD_FOR_TARGET_V850 = @LD_FOR_TARGET_V850@
 LIBINTL = @LIBINTL@
 LIBINTL_DEP = @LIBINTL_DEP@
 LIBOBJS = @LIBOBJS@
@@ -1162,6 +1258,7 @@ SIM_INLINE = @SIM_INLINE@
 SIM_PRIMARY_TARGET = @SIM_PRIMARY_TARGET@
 SIM_RX_CYCLE_ACCURATE_FLAGS = @SIM_RX_CYCLE_ACCURATE_FLAGS@
 SIM_SUBDIRS = @SIM_SUBDIRS@
+SIM_TOOLCHAIN_VARS = @SIM_TOOLCHAIN_VARS@
 STRIP = @STRIP@
 TERMCAP_LIB = @TERMCAP_LIB@
 USE_NLS = @USE_NLS@
@@ -2701,6 +2798,7 @@ site-sim-config.exp: Makefile
 	$(AM_V_GEN)( \
 	echo "set builddir \"$(builddir)\""; \
 	echo "set srcdir \"$(srcdir)/testsuite\""; \
+	$(foreach V,$(SIM_TOOLCHAIN_VARS),echo "set $(V) \"$($(V))\"";) \
 	) > $@
 
 check-DEJAGNU: site.exp

sim/configure.ac

@@ -103,6 +103,7 @@ m4_define([SIM_TARGET], [dnl
       $4
       ;;
   esac
+  SIM_AC_TOOLCHAIN_FOR_TARGET($2)
   AM_CONDITIONAL([SIM_ENABLE_ARCH_$2], [${sim_enable_arch_$2}])
 ])
 
@@ -151,6 +152,7 @@ if test "${enable_sim}" != no; then
   done
 
   if test "x${enable_example_sims}" = xyes; then
+    SIM_AC_TOOLCHAIN_FOR_TARGET(example-synacor)
     SIM_BUILD_TARGET([example-synacor])
   fi
 fi

sim/m4/sim_ac_toolchain.m4

@@ -77,3 +77,28 @@ AC_COMPILE_IFELSE([AC_LANG_SOURCE([
 ], [AC_MSG_ERROR([C11 is required])])])
 AC_SUBST(C_DIALECT)
 ])
+dnl
+SIM_TOOLCHAIN_VARS=
+AC_SUBST(SIM_TOOLCHAIN_VARS)
+AC_DEFUN([_SIM_AC_TOOLCHAIN_FOR_TARGET],
+[dnl
+AC_ARG_VAR(AS_FOR_TARGET_$2, [Assembler for $1 tests])
+AC_ARG_VAR(LD_FOR_TARGET_$2, [Linker for $1 tests])
+AC_ARG_VAR(CC_FOR_TARGET_$2, [C compiler for $1 tests])
+m4_bmatch($1, [example-], [dnl
+  : "${AS_FOR_TARGET_$2:=\$(abs_builddir)/../gas/as-new}"
+  : "${LD_FOR_TARGET_$2:=\$(abs_builddir)/../ld/ld-new}"
+  : "${CC_FOR_TARGET_$2:=\$(CC)}"
+], [dnl
+  AS_IF([test "$SIM_PRIMARY_TARGET" = "$1"], [dnl
+    : "${AS_FOR_TARGET_$2:=\$(abs_builddir)/../gas/as-new}"
+    : "${LD_FOR_TARGET_$2:=\$(abs_builddir)/../ld/ld-new}"
+    dnl The default will be checked at test time.  If it's not available, then
+    dnl it is automatically skipped.  So hardcoding this is safe.
+    : "${CC_FOR_TARGET_$2:=${target_alias}-gcc}"
+  ])
+])
+AS_VAR_APPEND([SIM_TOOLCHAIN_VARS], [" AS_FOR_TARGET_$2 LD_FOR_TARGET_$2 CC_FOR_TARGET_$2"])
+])
+AC_DEFUN([SIM_AC_TOOLCHAIN_FOR_TARGET],
+[_SIM_AC_TOOLCHAIN_FOR_TARGET($1, m4_toupper(m4_translit($1, [-], [_])))])

sim/testsuite/local.mk

@@ -28,6 +28,7 @@ site-sim-config.exp: Makefile
 	$(AM_V_GEN)( \
 	echo "set builddir \"$(builddir)\""; \
 	echo "set srcdir \"$(srcdir)/testsuite\""; \
+	$(foreach V,$(SIM_TOOLCHAIN_VARS),echo "set $(V) \"$($(V))\"";) \
 	) > $@
 
 check-DEJAGNU: site.exp