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685b7a7a1b
094772656d71b3f5022ae292094e878da035de9e build: support LTO in depends (fanquake)
Pull request description:
This adds an `LTO` option to depends, i.e `make -C depends LTO=1`, which passes `-flto` when building packages (not currently qt), and automatically configures with `--enable-lto` when doing a build using a `CONFIG_SITE`.
The following tables comapres the size (in bytes) of the stripped `x86_64` Linux binaries produced with master and this PR (full depends build):
| Binary | stripped master | stripped LTO=1 | saving |
| -------- | ----------------: | -------------: | --------: |
| bitcoin-cli | 1178632 | 469872 | 60% |
| bitcoin-tx | 2710584 | 1866504 | 31% |
| bitcoin-util | 952880 | 240104 | 74% |
| bitcoin-wallet | 7992888 | 5365984 | 32% |
| bitcoind | 13421336 | 11868592 | 12% |
| bitcoin-qt | 37680496 | 31640976 | 16% |
ACKs for top commit:
laanwj:
Tested ACK 094772656d71b3f5022ae292094e878da035de9e
Tree-SHA512: 6b8483ea490e57a153105ad8c38b25fb1af5d55b1af22db398c7c2573612aaf71b4d2b4cf09c18fd6331b1358dba01641eeaa03e5018a925392e1937118d984a
23 lines
491 B
Makefile
23 lines
491 B
Makefile
ifneq ($(shell $(SHELL) $(.SHELLFLAGS) "command -v $(host)-g++-posix"),)
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mingw32_CXX := $(host)-g++-posix
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endif
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mingw32_CFLAGS=-pipe
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ifneq ($(LTO),)
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mingw32_CFLAGS += -flto
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mingw32_LDFLAGS += -flto
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endif
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mingw32_CXXFLAGS=$(mingw32_CFLAGS)
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mingw32_release_CFLAGS=-O2
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mingw32_release_CXXFLAGS=$(mingw32_release_CFLAGS)
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mingw32_debug_CFLAGS=-O1
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mingw32_debug_CXXFLAGS=$(mingw32_debug_CFLAGS)
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mingw32_debug_CPPFLAGS=-D_GLIBCXX_DEBUG -D_GLIBCXX_DEBUG_PEDANTIC
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mingw32_cmake_system=Windows
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