xref: /petsc/gmakefile.test (revision baa5c0f46e095eb0c642a4339de9b41f2cdd5ea4)

# -*- mode: makefile-gmake -*-
-include petscdir.mk

.SUFFIXES: .F  .F90 .f90 ${SUFFIXES} .PETSc .C .cc .cpp .cxx .r .rm .so .html .ad .m .tex .mtex .make  .fig .svg .eps .pdf .jpg .png .dvi .ps .F95 .f95 .fiat .cu .kokkos.cxx

CONFIGDIR := $(PETSC_DIR)/config

# TESTSRCDIR is always relative to gmakefile.test
#  This must be before includes
mkfile_path := $(abspath $(lastword $(MAKEFILE_LIST)))
TESTSRCDIR := $(dir $(mkfile_path))src

-include $(PETSC_DIR)/$(PETSC_ARCH)/lib/petsc/conf/petscvariables
-include $(PETSC_DIR)/lib/petsc/conf/variables

TESTDIR ?= ./$(PETSC_ARCH)/tests
MODDIR := $(PETSC_DIR)/$(PETSC_ARCH)/include
TESTLOGTAPFILE ?= $(TESTDIR)/test_$(PETSC_ARCH)_tap.log
TESTLOGERRFILE ?= $(TESTDIR)/test_$(PETSC_ARCH)_err.log
EXAMPLESDIR := $(TESTSRCDIR)

pkgs := sys vec mat dm ksp snes ts tao

petscconf      := $(PETSC_DIR)/$(PETSC_ARCH)/include/petscconf.h
petscvariables := $(PETSC_DIR)/$(PETSC_ARCH)/lib/petsc/conf/petscvariables
generatedtest  := $(TESTDIR)/testfiles

.SECONDEXPANSION:		# to expand $$(@D)/.DIR

TESTFLAGS :=             # Initialize as simple variable

#workarround old cygwin versions
ifeq ($(PETSC_CYGWIN_BROKEN_PIPE),1)
ifeq ($(shell basename $(AR)),ar)
  V ?=1
endif
endif
V ?= $(if $(findstring s,$(MAKEFLAGS)),0)
ifeq ($(V),)  # Default
  quiet_HELP := "Use \"$(MAKE) V=1\" to see verbose compile lines, \"$(MAKE) V=0\" to suppress.\n"
  quiet = @printf $(quiet_HELP)$(eval quiet_HELP:=)"  %10s %s\n" "$1$2" "$@"; $($1)
  quiettest = @printf "  %10s %s\n" "TEST" "$(@:$(TESTDIR)/counts/%.counts=%)";
else ifeq ($(V),0)		# Suppress entire command
  quiet = @$($1)
  quiettest = @
  TESTFLAGS += -o err_only
else				# Show the full command line
  quiet = $($1)
  quiettest =
  TESTFLAGS += -v
endif

ifeq ($(FORCE),1)
  TESTFLAGS += -f    # force test execution
endif
ifeq ($(CUDAMEMCHECK),1)
  TESTFLAGS += -U    # Add cuda-memcheck option to the flags
endif
ifeq ($(VALGRIND),1)
  TESTFLAGS += -V    # Add valgrind option to the flags
endif
ifeq ($(REPLACE),1)
  TESTFLAGS += -m    # Replace results by passing -m to petscdiff
endif
ifeq ($(OUTPUT),1)
  TESTFLAGS += -o 'err_only'    # Show only the errors on stdout
endif
ifeq ($(ALT),1)
  TESTFLAGS += -M    # Replace alt files by passing -M to petscdiff
endif
PRINTONLY ?= 0
ifeq ($(PRINTONLY),1)
  TESTFLAGS += -p    # Pass -p to petscdiff to print only command
endif
ifeq ($(DIFF_NUMBERS),1)
  TESTFLAGS += -j    # Pass -j to petscdiff to diff the actual numbers
endif
ifdef OPTIONS
  TESTFLAGS += -a '$(OPTIONS)'   # override arguments
endif
ifdef EXTRA_OPTIONS
  TESTFLAGS += -e '$(EXTRA_OPTIONS)'  # add extra arguments
endif
ifdef NP
  TESTFLAGS += -n $(NP)  # set number of processes
endif
# Override the default timeout that may be found at the top of config/petsc_harness.sh
# This must be an integer.  It is given in seconds.
ifdef TIMEOUT
  TESTFLAGS += -t $(TIMEOUT)  # Override the default timeout
endif

$(generatedtest) : $(petscconf) $(petscvariables) $(CONFIGDIR)/gmakegentest.py $(TESTDIR)/.DIR | $$(@D)/.DIR
	$(PYTHON) $(CONFIGDIR)/gmakegentest.py --petsc-dir=$(PETSC_DIR) --petsc-arch=$(PETSC_ARCH) --testdir=$(TESTDIR)

ifneq ($(filter-out clean check,$(MAKECMDGOALS:clean%=clean)),)
include $(generatedtest)
endif

ifeq ($(PETSC_LANGUAGE),CXXONLY)
  cc_name := CXX
else
  cc_name := CC
endif

PETSC_COMPILE.c = $(call quiet,$(cc_name)) -c $(PCC_FLAGS) $(PFLAGS) $(CCPPFLAGS) $(C_DEPFLAGS)
PETSC_COMPILE.cxx = $(call quiet,CXX) -c $(CXX_FLAGS) $(CXXFLAGS) $(CXXCPPFLAGS) $(CXX_DEPFLAGS)
ifneq ($(KOKKOS_BIN),)
# Kokkos requires nvcc to be in PATH and the C++ compiler to be given in an environmental variable
PETSC_COMPILE.kokkos.cxx = PATH=$(PATH):`dirname $(CUDAC)` NVCC_WRAPPER_DEFAULT_COMPILER=$(CXX_LINKER) $(KOKKOS_BIN)/nvcc_wrapper --expt-extended-lambda -c $(CXX_FLAGS) $(CXXFLAGS) $(CXXCPPFLAGS)
PETSC_LINK.kokkos.cxx = PATH=$(PATH):`dirname $(CUDAC)` NVCC_WRAPPER_DEFAULT_COMPILER=$(CXX_LINKER) $(KOKKOS_BIN)/nvcc_wrapper --expt-extended-lambda  $(CXX_LINKER_FLAGS) $(PETSC_CCPPFLAGS) $(CPPFLAGS) $(LDFLAGS)
else
PETSC_COMPILE.kokkos.cxx = $(call quiet,CXX) -c $(CXX_FLAGS) $(CXXFLAGS) $(CXXCPPFLAGS) $(CXX_DEPFLAGS)
PETSC_LINK.kokkos.cxx = $(CXXLINKER) $(CXX_LINKER_FLAGS) $(CXXFLAGS) $(PETSC_CCPPFLAGS) $(CPPFLAGS) $(LDFLAGS)
endif
PETSC_COMPILE.cu = $(call quiet,CUDAC) -c $(CUDAC_FLAGS) $(CUFLAGS) --compiler-options="$(PCC_FLAGS) $(CXXFLAGS) $(CCPPFLAGS)"
PETSC_COMPILE.hip.cpp = $(call quiet,HIPCC) -c $(HIPCC_FLAGS) $(HIPCCFLAGS) $(HIPCCPPFLAGS) $(HIPCC_DEPFLAGS)
PETSC_COMPILE.sycl.cpp = $(call quiet,SYCLCPP) -c $(SYCLCPP_FLAGS) $(SYCLCPPFLAGS) $(SYCLCPPCPPFLAGS) $(SYCLCPP_DEPFLAGS)
PETSC_GENDEPS.cu = $(call quiet,CUDAC,.dep) --generate-dependencies --output-directory=$(@D) $(CUDAC_FLAGS) $(CUFLAGS) --compiler-options="$(PCC_FLAGS) $(CXXFLAGS) $(CCPPFLAGS)"
PETSC_COMPILE.F = $(call quiet,FC) -c $(FC_FLAGS) $(FFLAGS) $(FCPPFLAGS) $(FC_DEPFLAGS)

testlangs := c cu cxx F F90 kokkos.cxx hip.cpp sycl.cpp
$(foreach lang, $(testlangs), $(eval \
  testexe.$(lang) = $(foreach pkg, $(pkgs), $(testsrcs-$(pkg).$(lang):%.$(lang)=$(TESTDIR)/%))))
concattestlang = $(foreach lang, $(2), $(testsrcs-$(1).$(lang):%.$(lang)=$(TESTDIR)/%.o))
testsrcs.o := $(foreach pkg, $(pkgs), $(call concattestlang,$(pkg),$(testlangs)))
testsrcs-rel := $(foreach pkg, $(pkgs), $(foreach lang, $(testlangs), $(testsrcs-$(pkg).$(lang))))
testsrcs := $(foreach sfile, $(testsrcs-rel), $(TESTSRCDIR)/$(sfile))

# workaround win32fe failure
ifneq (,$(findstring win32fe,$(call quiet,$(cc_name))))
$(TESTDIR)/ts/tutorials/multirate/ex6: | $(TESTDIR)/ts/tutorials/multirate/ex5
$(TESTDIR)/ts/tutorials/multirate/ex8: | $(TESTDIR)/ts/tutorials/multirate/ex6
endif

# Refresh testfiles when sources change, but don't balk if the source file is nonexistent (deleted)
$(generatedtest) : $(testsrcs)
$(testsrcs) :

$(TESTDIR)/%.o : $(EXAMPLESDIR)/%.c | $$(@D)/.DIR
	$(PETSC_COMPILE.c) $(abspath $<) -o $@

$(TESTDIR)/%.o : $(EXAMPLESDIR)/%.kokkos.cxx | $$(@D)/.DIR
	$(PETSC_COMPILE.kokkos.cxx) $(abspath $<) -o $@

$(TESTDIR)/%.o : $(EXAMPLESDIR)/%.cxx | $$(@D)/.DIR
	$(PETSC_COMPILE.cxx) $(abspath $<) -o $@

$(TESTDIR)/%.o : $(EXAMPLESDIR)/%.cu | $$(@D)/.DIR
	$(PETSC_COMPILE.cu) $(abspath $<) -o $@ # Compile first so that if there is an error, it comes from a normal compile
	@$(PETSC_GENDEPS.cu) $(abspath $<) -o $(@:%.o=%.d) # Generate the dependencies for later

# Test modules go in the same directory as the target *.o
TESTMODDIR = $(@D)
FCMOD = cd
$(TESTDIR)/%.o : $(EXAMPLESDIR)/%.F | $$(@D)/.DIR
ifeq ($(FC_MODULE_OUTPUT_FLAG),)
	$(call quiet,FCMOD) $(TESTMODDIR) && $(FC) -c $(FC_FLAGS) $(FFLAGS) $(FCPPFLAGS) $(FC_DEPFLAGS) -I$(dir $<) $(abspath $<) -o $(abspath $@)
else
	$(PETSC_COMPILE.F) -I$(dir $<) $(abspath $<) -o $@ $(FC_MODULE_OUTPUT_FLAG)$(TESTMODDIR) $(FC_MODULE_FLAG)$(TESTMODDIR)
endif
	-@$(GFORTRAN_DEP_CLEANUP)

$(TESTDIR)/%.o : $(EXAMPLESDIR)/%.F90 | $$(@D)/.DIR
ifeq ($(FC_MODULE_OUTPUT_FLAG),)
	$(call quiet,FCMOD) $(TESTMODDIR) && $(FC) -c $(FC_FLAGS) $(FFLAGS) $(FCPPFLAGS) $(FC_DEPFLAGS) -I$(dir $<) $(abspath $<) -o $(abspath $@)
else
	$(PETSC_COMPILE.F) -I$(dir $<) $(abspath $<) -o $@ $(FC_MODULE_OUTPUT_FLAG)$(TESTMODDIR) $(FC_MODULE_FLAG)$(TESTMODDIR)
endif
	-@$(GFORTRAN_DEP_CLEANUP)

#   This is a hack to fix a broken gfortran.
define GFORTRAN_DEP_CLEANUP
  if test -e "$(@:%.o=%.d)" && head -1 "$(@:%.o=%.d)" | fgrep -q -v : ; then\
    echo "$(@): \\" > $(@:%.o=%.dtemp) ; \
    tr '\n' '@' < $(@:%.o=%.d) | cut -d: -f2- | tr '@' '\n' >> $(@:%.o=%.dtemp) ; \
    mv $(@:%.o=%.dtemp) $(@:%.o=%.d); \
  fi
endef

# link line constructed differently for gmakefile vs gmakefile.test invocation
ifeq ($(libpetscall),)
PETSC_TEST_LIB = $(PETSC_LIB)
else
PETSC_TEST_LIB = $(C_SH_LIB_PATH) $(PETSC_EXTERNAL_LIB_BASIC)
endif

# manually list some some library dependencies to check for circular dependencies
$(TESTDIR)/sys/tests/ex9: PETSC_TEST_LIB = $(PETSC_SYS_LIB)
$(TESTDIR)/vec/vec/tests/ex1: PETSC_TEST_LIB = $(PETSC_VEC_LIB)
$(TESTDIR)/mat/tests/ex1: PETSC_TEST_LIB = $(PETSC_MAT_LIB)
$(TESTDIR)/dm/tests/ex1: PETSC_TEST_LIB = $(PETSC_DM_LIB)
$(TESTDIR)/ksp/ksp/tests/ex1: PETSC_TEST_LIB = $(PETSC_KSP_LIB)
$(TESTDIR)/snes/tests/ex1: PETSC_TEST_LIB = $(PETSC_SNES_LIB)
$(TESTDIR)/ts/tests/ex2: PETSC_TEST_LIB = $(PETSC_TS_LIB)
$(TESTDIR)/tao/tutorials/ex1: PETSC_TEST_LIB = $(PETSC_TAO_LIB)

# if configured --with-macos-firewall-rules, ensure mpiexec.hydra and test executable is on firewall list
ifdef MACOS_FIREWALL_MPIEXEC
define macos-firewall-register
  @APP=$(call abspath, $(1)); \
    FW=/usr/libexec/ApplicationFirewall/socketfilterfw; \
    ANS=`$$FW --getappblocked $$APP`; \
    if ! echo $$ANS | grep "$$APP" &> /dev/null; then \
      if ! sudo -n true 2>/dev/null; then echo "Asking for sudo password to add new firewall rule for\n  $$APP:"; fi; \
      sudo $$FW --add $$APP && \
      sudo $$FW --block $$APP; \
    else \
      echo $$ANS; \
    fi
endef
define macos-firewall-fix
  $(call macos-firewall-register, $(MACOS_FIREWALL_MPIEXEC))
  $(call macos-firewall-register, $(1))
endef
endif

# Test executables
$(testexe.F) $(testexe.F90) : $(TESTDIR)/% : $(TESTDIR)/%.o $$^ $(libpetscall)
	$(call quiet,FLINKER) -o $@ $^ $(PETSC_TEST_LIB)
	-$(call macos-firewall-fix,$@)

$(testexe.c) $(testexe.cu) : $(TESTDIR)/% : $(TESTDIR)/%.o $$^ $(libpetscall)
	$(call quiet,CLINKER) -o $@ $^ $(PETSC_TEST_LIB)
	-$(call macos-firewall-fix,$@)

$(testexe.kokkos.cxx) : $(TESTDIR)/% : $(TESTDIR)/%.o $$^ $(libpetscall)
	$(call quiet,PETSC_LINK.kokkos.cxx) -o $@ $^ $(PETSC_TEST_LIB)
	-$(call macos-firewall-fix,$@)

$(testexe.cxx) : $(TESTDIR)/% : $(TESTDIR)/%.o $$^ $(libpetscall)
	$(call quiet,CXXLINKER) -o $@ $^ $(PETSC_TEST_LIB)
	-$(call macos-firewall-fix,$@)

# Fortran source files need petsc*.mod, which isn't explicitly managed in the makefile.
$(foreach pkg, $(pkgs), $(call concattestlang,$(pkg),F F90)) : $(libpetscall)

# Testing convenience targets
.PHONY: test pre-clean

test: report_tests

pre-clean:
	@$(RM) -rf $(TESTDIR)/counts $(TESTLOGTAPFILE) $(TESTLOGERRFILE)
	@touch $(TESTLOGTAPFILE) $(TESTLOGERRFILE)
	@echo "Using MAKEFLAGS:" ${MAKEFLAGS}

check-test-errors:
	@grep '^not ok' $(TESTLOGTAPFILE) | grep -v 'Exceeded timeout' | tee $(TESTDIR)/allgtests-tap-err.log
	@test ! -s $(TESTDIR)/allgtests-tap-err.log

.PHONY: $(foreach pkg, $(pkgs), test-$(pkg) $(foreach lang, $(testlangs), test-$(pkg).$(lang) test-rm-$(pkg).$(lang)))
testpkgs := $(foreach pkg, $(pkgs), test-$(pkg))
# Targets to run tests in test-$pkg.$lang and delete the executables, language by language
$(testpkgs) : test-% : $(foreach lang, $(testlangs), test-rm-%.$(lang))
# List of raw test run targets
alltesttargets := $(foreach tp, $(testpkgs), $(foreach lang, $(testlangs), $($(tp).$(lang))))

# Run targets
$(alltesttargets) : % : $(TESTDIR)/counts/%.counts
.PHONY: $(alltesttargets)

$(TESTDIR)/counts/%.counts :
	$(quiettest) $< $(TESTFLAGS)

# Targets to run tests and remove executables, by package-lang pairs.
# Run the tests in each batch using recursive invocation of make because
# we need all of them to complete before removing the executables.  Make
# doesn't guarantee an exploration order for the graph.  Only recursive
# if there is something to be done.
alltest-rm := $(foreach pkg, $(pkgs), $(foreach lang, $(testlangs), test-rm-$(pkg).$(lang)))
$(alltest-rm) : test-rm-% : test-%
ifneq ($(NO_RM),1)
	$(call quiet,RM) $(addprefix $(TESTDIR)/,$(basename $($(@:test-rm-%=testsrcs-%))))
endif

# Remove intermediate .o files
# This only removes the files at the end which is insufficient
#.INTERMEDIATE: $(testsrcs.o:%.o=%)

# all sources should get recompiled when petscvariables changes (i.e when configure is rerun or when petscvariables is manually edited.)
$(testsrcs.o) : $(petscvariables)

%/.DIR :
	@mkdir -p $(@D)
	@touch $@

.PRECIOUS: %/.DIR

.SUFFIXES: # Clear .SUFFIXES because we don't use implicit rules
.DELETE_ON_ERROR:               # Delete likely-corrupt target file if rule fails

.PHONY: clean cleantest all

cleantest:
	${RM} -r $(TESTDIR) $(generatedtest)

clean: cleantest

alltest.d := $(testsrcs.o:%.o=%.d)
# Tell make that alltest.d are all up to date.  Without this, the include
# below has quadratic complexity, taking more than one second for a
# do-nothing build of PETSc (much worse for larger projects)
$(alltest.d) : ;

-include $(alltest.d)

# Tests can be generated by searching
# Percent is a wildcard (only one allowed):
#    make -f gmakefile test search=sys%ex2
# To match internal substrings (matches *ex2*):
#    make -f gmakefile test searchin=ex2
# Search and searchin can be combined:
#    make -f gmakefile test search='sys%' searchin=ex2
# For args:
#    make -f gmakefile test argsearch=cuda
# For general glob-style searching using python:
# NOTE: uses shell which is possibly slower and is possibly more brittle
#    make -f gmakefile test globsearch='sys*ex2*'
ifdef search
  TESTTARGETS := $(filter $(search),$(alltesttargets))
  ifdef searchin
    TESTTARGETS2 := $(foreach v,$(TESTTARGETS),$(if $(findstring $(searchin),$(v)),$(v)))
    TESTTARGETS := $(TESTTARGETS2)
  endif
else ifdef searchin
  TESTTARGETS := $(foreach v,$(alltesttargets),$(if $(findstring $(searchin),$(v)),$(v)))
else ifdef argsearch
  TESTTARGETS := $(foreach v,$(alltesttargets),$(if $(findstring $(argsearch),$($(v)_ARGS)),$(v)))
else ifdef globsearch
  TESTTARGETS := $(shell $(PYTHON) config/query_tests.py --petsc-dir=$(PETSC_DIR) --petsc-arch=$(PETSC_ARCH) 'name' '$(globsearch)')
else ifdef test-fail
  TESTTARGETS := $(shell $(PETSC_ARCH)/tests/echofailures.sh)
else ifdef query
  TESTTARGETS := $(shell $(PYTHON) config/query_tests.py --petsc-dir=$(PETSC_DIR) --petsc-arch=$(PETSC_ARCH) '$(query)' '$(queryval)')
else                            # No filter - run them all, but delete the executables as we go
  TESTTARGETS := $(testpkgs)
endif

.PHONY: report_tests print-test

print-test:
	$(info $(TESTTARGETS))
	@true

show-fail:
	-@$(PYTHON) $(CONFIGDIR)/report_tests.py -d $(TESTDIR)/counts -f



# Don't start running tests until starttime has completed
$(alltesttargets:%=$(TESTDIR)/counts/%.counts) : starttime

# Ensure that libpetsc (if it is a prerequisite) has been built and clean the counts/logs before starting timer
starttime: pre-clean $(libpetscall)
	@$(eval STARTTIME := $(shell date +%s))

report_tests: starttime $(TESTTARGETS)
	@$(eval ENDTIME := $(shell date +%s))
	-@if test ${PRINTONLY} -ne 1; then  elapsed_time=$$(($(ENDTIME)- $(STARTTIME))) && \
	$(PYTHON) $(CONFIGDIR)/report_tests.py -m $(MAKE) -d $(TESTDIR)/counts -t 5 -e $${elapsed_time};\
    fi

check_output:
	$(PYTHON) $(CONFIGDIR)/gmakegentest.py --petsc-dir=$(PETSC_DIR) --petsc-arch=$(PETSC_ARCH) --testdir=$(TESTDIR) --check-output

# Do not how how to invoke test from makefile
HASGMAKEFILE := $(filter gmakefile,$(MAKEFILE_LIST))
ifeq ($(HASGMAKEFILE),gmakefile)
helpdeps:=help-make help-targets
makefile="gmakefile"
other_help="To see full test help: make -f gmakefile.test help"
else
helpdeps:=help-make help-targets help-test
makefile="gmakefile.test"
other_help=""
endif

help: ${helpdeps}
	-@echo "Above is from: ${helpdeps}"
	-@echo "${other_help}"

help-make:
	-@echo
	-@echo "Basic build usage:"
	-@echo "   make -f ${makefile} <options>"
	-@echo
	-@echo "Options:"
	-@echo "  V=0           Very quiet builds"
	-@echo "  V=1           Verbose builds"
	-@echo

help-targets:
	-@echo "All makefile targets and their dependencies:"
	-@grep ^[a-z] ${makefile} | grep : | grep -v =
	-@echo
	-@echo

help-test:
	-@echo "Basic test usage:"
	-@echo "   make -f ${makefile} test <options>"
	-@echo
	-@echo "Options:"
	-@echo "  NO_RM=1           Do not remove the executables after running"
	-@echo "  REPLACE=1         Replace the output in PETSC_DIR source tree (-m to test scripts)"
	-@echo "  OUTPUT=1          Show only the errors on stdout"
	-@echo "  ALT=1             Replace 'alt' output in PETSC_DIR source tree (-M to test scripts)"
	-@echo "  DIFF_NUMBERS=1    Diff the numbers in the output (-j to test scripts and petscdiff)"
	-@echo "  CUDAMEMCHECK=1    Execute the tests using cuda-memcheck (-U to test scripts)"
	-@echo "  VALGRIND=1        Execute the tests using valgrind (-V to test scripts)"
	-@echo "  NP=<num proc>     Set a number of processors to pass to scripts."
	-@echo "  FORCE=1           Force SKIP or TODO tests to run"
	-@echo "  PRINTONLY=1       Print the command, but do not run.  For loops print first command"
	-@echo "  TIMEOUT=<time>    Test timeout limit in seconds (default in config/petsc_harness.sh)"
	-@echo "  TESTDIR='tests'   Subdirectory where tests are run ($${PETSC_DIR}/$${PETSC_ARCH}/$${TESTDIR}"
	-@echo "                    or $${PREFIX_DIR}/$${TESTDIR}"
	-@echo "                    or $${PREFIX_DIR}/share/petsc/examples/$${TESTDIR})"
	-@echo "  TESTBASE='tests'   Subdirectory where tests are run ($${PETSC_DIR}/$${PETSC_ARCH}/$${TESTDIR}"
	-@echo "  OPTIONS='<args>'  Override options to scripts (-a to test scripts)"
	-@echo "  EXTRA_OPTIONS='<args>'  Add options to scripts (-e to test scripts)"
	-@echo
	-@echo "Tests can be generated by searching:"
	-@echo "  Percent is a wildcard (only one allowed):"
	-@echo "    make -f ${makefile} test search=sys%ex2"
	-@echo
	-@echo "  To match internal substrings (matches *ex2*):"
	-@echo "    make -f ${makefile} test searchin=ex2"
	-@echo
	-@echo "  Search and searchin can be combined:"
	-@echo "    make -f ${makefile} test search='sys%' searchin=ex2"
	-@echo
	-@echo "  To match patterns in the arguments:"
	-@echo "    make -f ${makefile} test argsearch=cuda"
	-@echo
	-@echo "  For general glob-style searching using python:"
	-@echo "   NOTE: uses shell which is possibly slower and more brittle"
	-@echo "    make -f ${makefile} test globsearch='sys*ex2*'"
	-@echo
	-@echo "  To re-run the last tests which failed:"
	-@echo "    make -f ${makefile} test test-fail='1'"
	-@echo
	-@echo "  To search for fields from the original test definitions:"
	-@echo "    make -f ${makefile} test query='requires' queryval='*MPI_PROCESS_SHARED_MEMORY*'"
	-@echo
	-@echo "  To see which targets match a given pattern (useful for doing a specific target):"
	-@echo "    make -f ${makefile} print-test search=sys%"
	-@echo "  which is equivalent to:"
	-@echo "    make -f ${makefile} print VAR=TESTTARGETS search='sys%'"
	-@echo
	-@echo "  To build an executable, give full path to location:"
	-@echo '    make -f ${makefile} $${PETSC_ARCH}/tests/sys/tests/ex1'
	-@echo "  or make the test with NO_RM=1"
	-@echo