Generate compiler flags from toml file

data/Makefile.in

@@ -87,12 +87,10 @@ DEV_TARGET      ?= devrun
 GT_TARGET       ?= gtrun
 GT_OUT          := ground-truth.csv
 
-UNAME_S         := $(shell uname -s)
+UNAME_S         := {uname}
 
 # will be None if not specified in flit-config.toml
-CLANG           := {clang_compiler}
-INTEL           := {intel_compiler}
-GCC             := {gcc_compiler}
+{compiler_defs}
 CLANG_TYPE      := clang
 INTEL_TYPE      := intel
 GCC_TYPE        := gcc
@@ -227,7 +225,7 @@ GT_OBJ           = $(addprefix $(OBJ_DIR)/,$(notdir $(SOURCE:%.cpp=%_gt.o)))
 GT_DEPS          = $(GT_OBJ:%.o=%.d)
 GT_OBJ_FPIC      = $(GT_OBJ:%.o=%_fPIC.o)
 
-HOSTNAME        := $(shell hostname)
+HOSTNAME        := {hostname}
 
 RESULTS_DIR     := results
 
@@ -245,128 +243,19 @@ endif
 # more comp settings, taken from here:
 # https://software.intel.com/sites/default/files/article/326703/fp-control-2012-08.pdf
 
-#individual flags
+# individual flags
+
 ## optls
 
-O0              := -O0
-O1              := -O1
-O2              := -O2
-O3              := -O3
-
-#switches
-
-ASSOCMATH       := -fassociative-math
-AVX             := -mavx
-COMPTRANS       := -mp1
-DEFFLAGS        :=
-DISFMA          := -no-fma
-ENAFMA          := -fma
-FASTEXPREC      := -fexcess-precision=fast
-FASTM           := -ffast-math
-FINMATH         := -ffinite-math-only
-FLUSHDEN        := -ftz
-FMAGCC          := -mavx2 -mfma
-FMAICC          := -march=core-avx2
-FORTRULES       := -fcx-fortran-rules
-FPCONT          := -ffp-contract=on
-FPMODDBL        := -fp-model=double
-FPMODEXC        := -fp-model=except
-FPMODEXT        := -fp-model=extended
-FPMODFST1       := -fp-model fast=1
-FPMODFST2       := -fp-model fast=2
-FPMODPRE        := -fp-model=precise
-FPMODSRC        := -fp-model=source
-FPMODSTR        := -fp-model=strict
-FPTRAP          := -fp-trap=common
-FSTORE          := -ffloat-store
-LIMITEDRANGE    := -fcx-limited-range
-MCONSTS         := -fmerge-all-constants
-NOFLUSHDEN      := -no-ftz
-NOPRECDIV       := -no-prec-div
-NOTRAP          := -fno-trapping-math
-PRECDIV         := -prec-div
-RECIPMATH       := -freciprocal-math
-ROUNDINGMATH    := -frounding-math
-ROUNDUSR        := -fp-port
-SIGNALNAN       := -fsignaling-nans
-SINGLEPRECCONST := -fsingle-precision-constant
-SSE             := -mfpmath=sse -mtune=native
-STDEXPREC       := -fexcess-precision=standard
-UNSOPTS         := -funsafe-math-optimizations
-USEFASTM        := --use_fast_math
-
-# Collections
-
-OPCODES         := O0 O1 O2 O3
-
-# NOTE: gcc disables ASSOCMATH @ O0
-SWITCHES_GCC    += ASSOCMATH
-SWITCHES_GCC    += AVX
-SWITCHES_GCC    += DEFFLAGS
-SWITCHES_GCC    += FASTEXPREC
-SWITCHES_GCC    += FINMATH
-SWITCHES_GCC    += FMAGCC
-SWITCHES_GCC    += FORTRULES
-SWITCHES_GCC    += FPCONT
-SWITCHES_GCC    += FSTORE
-SWITCHES_GCC    += LIMITEDRANGE
-SWITCHES_GCC    += MCONSTS
-SWITCHES_GCC    += NOTRAP
-SWITCHES_GCC    += RECIPMATH
-SWITCHES_GCC    += ROUNDINGMATH
-SWITCHES_GCC    += SIGNALNAN
-SWITCHES_GCC    += SSE
-SWITCHES_GCC    += UNSOPTS
-
-#NOTE: Clang not honoring ASSOCMATH (issues warning with 3.9)
-# see: https://llvm.org/bugs/show_bug.cgi?id=27372
-
-SWITCHES_CLANG  += ASSOCMATH
-SWITCHES_CLANG  += AVX
-SWITCHES_CLANG  += DEFFLAGS
-SWITCHES_CLANG  += FASTEXPREC
-SWITCHES_CLANG  += FINMATH
-SWITCHES_CLANG  += FMAGCC
-SWITCHES_CLANG  += FMAICC
-SWITCHES_CLANG  += FPCONT
-SWITCHES_CLANG  += FSTORE
-SWITCHES_CLANG  += MCONSTS
-SWITCHES_CLANG  += NOTRAP
-SWITCHES_CLANG  += RECIPMATH
-SWITCHES_CLANG  += ROUNDINGMATH
-SWITCHES_CLANG  += SIGNALNAN
-SWITCHES_CLANG  += SINGLEPRECCONST
-SWITCHES_CLANG  += SSE
-SWITCHES_CLANG  += STDEXPREC
-SWITCHES_CLANG  += UNSOPTS
-
-SWITCHES_INTEL  += AVX
-SWITCHES_INTEL  += COMPTRANS
-SWITCHES_INTEL  += DEFFLAGS
-SWITCHES_INTEL  += DISFMA
-SWITCHES_INTEL  += ENAFMA
-SWITCHES_INTEL  += FLUSHDEN
-SWITCHES_INTEL  += FMAGCC
-SWITCHES_INTEL  += FMAICC
-SWITCHES_INTEL  += FPMODDBL
-SWITCHES_INTEL  += FPMODEXT
-SWITCHES_INTEL  += FPMODFST1
-SWITCHES_INTEL  += FPMODFST2
-SWITCHES_INTEL  += FPMODPRE
-SWITCHES_INTEL  += FPMODSRC
-SWITCHES_INTEL  += FPMODSTR
-SWITCHES_INTEL  += FSTORE
-SWITCHES_INTEL  += LIMITEDRANGE
-SWITCHES_INTEL  += MCONSTS
-SWITCHES_INTEL  += NOFLUSHDEN
-SWITCHES_INTEL  += NOPRECDIV
-SWITCHES_INTEL  += PRECDIV
-SWITCHES_INTEL  += ROUNDINGMATH
-SWITCHES_INTEL  += ROUNDUSR
-SWITCHES_INTEL  += SINGLEPRECCONST
-SWITCHES_INTEL  += SSE
-SWITCHES_INTEL  += USEFASTM
+{opcodes_definitions}
+
+## switches
+
+{switches_definitions}
+
+{compiler_opcodes}
 
+{compiler_switches}
 
 ##########################################################
 #
@@ -459,7 +348,7 @@ TARGET_OUTS :=
 
 # @param 1: compiler variable name (e.g. CLANG)
 # @param 2: optimization level variable name (e.g. O2)
-# @param 3: switches variable name (e.g. USEFASTM)
+# @param 3: switches variable name (e.g. --use_fast_math)
 define RECURSION_RULE
 TARGETS     += $$(RESULTS_DIR)/$(strip $1)_$$(HOSTNAME)_$(strip $3)_$(strip $2)
 
@@ -482,7 +371,7 @@ endef
 
 $(foreach c, $(COMPILERS),                 \
   $(foreach s, $(SWITCHES_$(strip $c)),    \
-    $(foreach o, $(OPCODES),               \
+    $(foreach o, $(OPCODES_$(strip $c)),               \
       $(eval $(call RECURSION_RULE, $c, $o, $s)))))
 TARGET_OUTS     := $(TARGETS:%=%-out)
 TARGET_RESULTS  := $(TARGET_OUTS:%=%-comparison.csv)

documentation/available-compiler-flags.md

@@ -12,15 +12,6 @@ Convenient TOML lists:
 * [Clang](#clang)
 * [Intel](#intel)
 
-Currently, the configuration file does not specify the flags and optimization
-levels to use.  We plan to change this in future updates.  Consider the
-documentation below to relate to future desired features.  See
-[issue-119](https://github.com/PRUNERS/FLiT/issues/119).
-
-The flags below are still useful to understand because they are the current
-flags that are hard-coded into the autogenerated `Makefile`.  Below is a
-comprehensive list of switches used.
-
 
 ## All Flags
 
@@ -73,9 +64,15 @@ For your convenience, here are toml-style lists that can be copied into your
 
 ## GCC
 
+**Note:** in some versions of python-toml, there is a parsing bug when a list
+has an empty string in the middle.  So simply put it at the end without a
+comma.  This has been fixed in the latest version of python-toml.
+
+You will likely want the empty string in your search space as it represents the
+absence of any switches.
+
 ```toml
-switches = [
-  '',
+switches_list = [
   '-fassociative-math',
   '-fcx-fortran-rules',
   '-fcx-limited-range',
@@ -92,14 +89,14 @@ switches = [
   '-mavx',
   '-mavx2 -mfma',
   '-mfpmath=sse -mtune=native',
+  ''
 ]
 ```
 
 ## Clang
 
 ```toml
-switches = [
-  '',
+switches_list = [
   '-fassociative-math',
   '-fexcess-precision=fast',
   '-fexcess-precision=standard',
@@ -117,14 +114,14 @@ switches = [
   '-mavx',
   '-mavx2 -mfma',
   '-mfpmath=sse -mtune=native',
+  ''
 ]
 ```
 
 ## Intel
 
 ```toml
-switches = [
-  '',
+switches_list = [
   '--use_fast_math',
   '-fcx-limited-range',
   '-ffloat-store',
@@ -151,6 +148,7 @@ switches = [
   '-no-ftz',
   '-no-prec-div',
   '-prec-div',
+  ''
 ]
 ```