poz/osuplusplus
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speed up make pp from 23 seconds to almost instant

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this is done by removing all headers from the top of the file using that
awk written by the amazing Jappie3 from the hyprland discord

g++ -E itself was pretty fast but clang-format took a while to format a
52k line file (wonder why), removing std makes the files considerably
smaller and makes the whole operation almost instant

one small issue is currently the script removes every single header
unless it hits something else - not ideal since my own headers will get
wiped too and in the preprocessed output not all macros will be
evaluated (e.g. FOR_EACH from for_each.hpp in config.hpp)
This commit is contained in:
jacekpoz 2024-04-24 23:25:15 +02:00
parent 3c4f5ababa
commit e1dbdf5228
Signed by: poz
SSH key fingerprint: SHA256:JyLeVWE4bF3tDnFeUpUaJsPsNlJyBldDGV/dIKSLyN8
1 changed files with 9 additions and 2 deletions
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11
Makefile
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@ -41,12 +41,19 @@ _PP_CXX = osuparser.cpp
_PP = $(_PP_HXX) $(_PP_CXX) _PP = $(_PP_HXX) $(_PP_CXX)
PP = $(addprefix $(PREPROCESSED)/, $(_PP)) PP = $(addprefix $(PREPROCESSED)/, $(_PP))
# TODO work out how to keep my own headers in the awk somehow
pp: dirs $(PP) pp: dirs $(PP)
$(PREPROCESSED)/%.hpp: $(INCLUDE)/%.hpp $(PREPROCESSED)/%.hpp: $(INCLUDE)/%.hpp
$(CXX) $(CXXFLAGS) -E $< > $@ $(eval TMP := $(shell mktemp).hpp)
awk '/^#include/ || /^#pragma/ || /^namespace/ || /^[[:space:]]*$$/ {if(!f)next} // {f=1;print}' $< > $(TMP)
$(CXX) $(CXXFLAGS) -E $(TMP) > $@
clang-format -i $@ clang-format -i $@
rm -rf $(TMP)
$(PREPROCESSED)/%.cpp: $(SRC)/%.cpp $(PREPROCESSED)/%.cpp: $(SRC)/%.cpp
$(CXX) $(CXXFLAGS) -E $< > $@ $(eval TMP := $(shell mktemp).cpp)
awk '/^#include/ || /^#pragma/ || /^namespace/ || /^[[:space:]]*$$/ {if(!f)next} // {f=1;print}' $< > $(TMP)
$(CXX) $(CXXFLAGS) -E $(TMP) > $@
clang-format -i $@ clang-format -i $@
rm -rf $(TMP)