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build: Experimental LTO support, phase one

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* Only codecs and plugins are enabled
 * Only native builds (so far)
 * Only tested on xDuoo X3 (MIPS, monochrome)
 * opus & speex generate some warnings
 * Significant compile time impact

Change-Id: I519b0d179631a54b2103cd67225bd5ec6ad3bd2f
This commit is contained in:
Solomon Peachy 2023-07-02 20:43:01 -04:00
parent 7b12cc3927
commit 73f40d8a23
4 changed files with 31 additions and 1 deletions
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12
apps/plugins/plugins.make
View file

@ -37,6 +37,12 @@ PLUGINLIB_OBJ := $(PLUGINLIB_SRC:.c=.o)
PLUGINLIB_OBJ := $(PLUGINLIB_OBJ:.S=.o)
PLUGINLIB_OBJ := $(call full_path_subst,$(ROOTDIR)/%,$(BUILDDIR)/%,$(PLUGINLIB_OBJ))
ifdef USE_LTO
# We do NOT want LTO on the GCC support file.
$(BUILDDIR)/apps/plugins/lib/gcc-support.o: PLUGINFLAGS += -fno-lto
$(BUILDDIR)/apps/plugins/plugin_crt0.o: PLUGINFLAGS += -fno-lto
endif
### build data / rules
ifndef APP_TYPE
CONFIGFILE := $(FIRMDIR)/export/config/$(MODELNAME).h
@ -147,6 +153,12 @@ else
endif
PLUGINLDFLAGS += $(GLOBAL_LDOPTS)
ifdef USE_LTO
PLUGINFLAGS += -flto -fno-builtin -ffreestanding
PLUGINLDFLAGS += -flto -fno-builtin -ffreestanding
PLUGINLDFLAGS += -e plugin_start
endif
$(BUILDDIR)/%.rock:
$(call PRINTS,LD $(@F))$(CC) $(PLUGINFLAGS) -o $(BUILDDIR)/$*.elf \
$(filter %.o, $^) \

7
lib/rbcodec/codecs/codecs.make
View file

@ -33,6 +33,13 @@ else
endif
CODECLDFLAGS += $(GLOBAL_LDOPTS)
ifdef USE_LTO
CODECLDFLAGS += -flto -fno-builtin -ffreestanding
CODECFLAGS += -flto -fno-builtin -ffreestanding
CODECLDFLAGS += -e __header
endif
# the codec libraries
include $(RBCODECLIB_DIR)/codecs/demac/libdemac.make
include $(RBCODECLIB_DIR)/codecs/liba52/liba52.make

5
lib/rbcodec/codecs/lib/libcodec.make
View file

@ -23,6 +23,11 @@ ifneq ($(findstring sdl-sim, $(APP_TYPE)), sdl-sim)
CODECLIBFLAGS += -ffunction-sections
endif
ifdef USE_LTO
# We do NOT want LTO on the GCC support file
$(CODECDIR)/lib/codeclib.o: CODECLIBFLAGS += -fno-lto
endif
$(CODECDIR)/lib/%.o: $(RBCODECLIB_DIR)/codecs/lib/%.c
$(SILENT)mkdir -p $(dir $@)
$(call PRINTS,CC $(subst $(ROOTDIR)/,,$<))$(CC) \

8
tools/configure vendored
View file

@ -945,13 +945,14 @@ whichadvanced () {
echo ""
printf "Enter your developer options (press only enter when done)\n\
(D)EBUG, (L)ogf, Boot(c)hart, (S)imulator, (P)rofiling, (V)oice, (U)SB Serial, (W)in32 crosscompile,\n\
Win(6)4 crosscompile, (T)est plugins, (O)mit plugins, S(m)all C lib, Logf to Ser(i)al port:"
Win(6)4 crosscompile, (T)est plugins, (O)mit plugins, S(m)all C lib, Logf to Ser(i)al port, LTO (B)uild "
if [ "$modelname" = "iaudiom5" ]; then
printf ", (F)M radio MOD"
fi
if [ "$modelname" = "iriverh120" ]; then
printf ", (R)TC MOD"
fi
printf ":"
echo ""
fi
@ -1043,6 +1044,10 @@ Win(6)4 crosscompile, (T)est plugins, (O)mit plugins, S(m)all C lib, Logf to Ser
win32crosscompile="yes"
win64="yes"
;;
[Bb])
echo "LTO build enabled"
LTO_ARG="export USE_LTO=y"
;;
"") # Match enter press when finished with advanced options
cont=0
;;
@ -4806,6 +4811,7 @@ export ANDROID_PLATFORM_VERSION=${ANDROID_PLATFORM_VERSION}
export TOOLSET=${toolset}
export PIPER_MODEL_DIR=${PIPER_MODEL_DIR}
$CCACHE_ARG
$LTO_ARG
CONFIGURE_OPTIONS=${cmdline}