Some -m32 tests, add SIM, move CXXFLAGS around

- Move -fno-operator-names to GCC flags.
- Build with VIR_NEXT_PATCH.
- Build with static libstdc++ (for non-system GCC)
- Add i686 and pentium3 when building with FLAGS=-m32
- Disable float16_t with FLAGS=-m32
- Allow running test executables via $(SIM)

Signed-off-by: Matthias Kretz <m.kretz@gsi.de>

Author: mattkretz

Makefile.common

@@ -4,9 +4,9 @@
 
 objdir = obj
 
-CXXFLAGS+=-std=c++26 -Wall -Wextra -Werror -O2 -g0 -Wno-attributes -fno-operator-names -D_GLIBCXX_ASSERTIONS=1 -D_GLIBCXX_SIMD_COND_EXPLICIT_MASK_CONVERSION $(FLAGS)
+CXXFLAGS+=-std=c++26 -Wall -Wextra -Werror -O2 -g0 -Wno-attributes -D_GLIBCXX_ASSERTIONS=1 -D_GLIBCXX_SIMD_COND_EXPLICIT_MASK_CONVERSION -DVIR_NEXT_PATCH $(FLAGS)
 CXXFLAGS_clang := -Wno-unknown-pragmas -ferror-limit=3
-CXXFLAGS_gcc := -fconcepts-diagnostics-depth=2 -fconstexpr-ops-limit=67108864 -fmax-errors=6 -freflection -Wno-psabi
+CXXFLAGS_gcc := -fconcepts-diagnostics-depth=2 -fconstexpr-ops-limit=67108864 -fmax-errors=6 -freflection -Wno-psabi -static-libstdc++ -fno-operator-names
 
 cxx_version := $(shell $(CXX) --version | head -n1)
 
@@ -90,6 +90,10 @@ testarchs ::= x86-64 \
 	     x86-64-v4 \
 	     graniterapids
 
+ifeq ($(FLAGS),-m32)
+testarchs += i686 pentium3
+endif
+
 disabled_tests ::=
 
 tests ::= $(filter-out $(disabled_tests),$(patsubst tests/%.cpp,%,$(wildcard tests/*.cpp)))
@@ -107,10 +111,12 @@ testtypes ::= signed-char \
 	     complex-float \
 	     complex-double
 
+ifneq ($(FLAGS),-m32)
 ifneq ($(compiler),clang)
 testtypes += std::float16_t
 testtypes += complex-float16_t
 endif
+endif
 
 testtypes ::= $(subst ::,--,$(testtypes))
 
@@ -194,7 +200,7 @@ ifeq ($(DIRECT),)
 	@rm $$(@:check/%=$(objdir)/%.o)
 endif
 	@rm -f $$@.failed
-	@$$(@:check/%=$(objdir)/%.exe) >$$@ 2>&1 && { \
+	@$$(SIM) $$(@:check/%=$(objdir)/%.exe) >$$@ 2>&1 && { \
 		printf -- '$$(msg_run) %-60s %s\n' '$$@' "$$$$($$(print_progress))"; \
 		touch -r $$(@:check/%=$(objdir)/%.exe) $$@; \
 	} || { \