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build: remove --enable-lto

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This has outlived its usefulness, doesn't gel well with
newer compilers & `-flto` related options, i.e thin vs full, or `=auto`,
and having `-flto` as the only option means that sometimes this just
needs to be worked around, i.e in oss-fuzz:
https://github.com/google/oss-fuzz/blob/master/projects/bitcoin-core/build.sh.

While it was convenient when `-flto` was newer, support for `-flto` is now
in all compilers we use, and there's also no-longer any real need
for us to treat `-flto` different to any other optimization option.

Remove it, to remove build complexity, and so there's no need
to port a similar option to CMake.

Note that the LTO option remains in depends, because we still a way to
build packages that have LTO specific patches/options.

If we decide to merge this, I'll follow up downstream in oss-fuzz first,
to make sure we don't break the build.
This commit is contained in:
fanquake
2023-12-06 12:26:02 +00:00
parent c80f57ba57
commit 2d1b1c7dae
11 changed files with 5 additions and 57 deletions
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5
depends/hosts/android.mk
View File

@@ -9,11 +9,6 @@ endif
android_CFLAGS=-std=$(C_STANDARD)
android_CXXFLAGS=-std=$(CXX_STANDARD)
ifneq ($(LTO),)
android_CFLAGS += -flto
android_LDFLAGS += -flto
endif
android_AR=$(ANDROID_TOOLCHAIN_BIN)/llvm-ar
android_RANLIB=$(ANDROID_TOOLCHAIN_BIN)/llvm-ranlib

6
depends/hosts/darwin.mk
View File

@@ -97,12 +97,6 @@ darwin_CFLAGS=-pipe -std=$(C_STANDARD)
darwin_CXXFLAGS=-pipe -std=$(CXX_STANDARD)
darwin_LDFLAGS=-Wl,-platform_version,macos,$(OSX_MIN_VERSION),$(OSX_SDK_VERSION)
ifneq ($(LTO),)
darwin_CFLAGS += -flto
darwin_CXXFLAGS += -flto
darwin_LDFLAGS += -flto
endif
darwin_release_CFLAGS=-O2
darwin_release_CXXFLAGS=$(darwin_release_CFLAGS)

6
depends/hosts/freebsd.mk
View File

@@ -1,12 +1,6 @@
freebsd_CFLAGS=-pipe -std=$(C_STANDARD)
freebsd_CXXFLAGS=-pipe -std=$(CXX_STANDARD)
ifneq ($(LTO),)
freebsd_CFLAGS += -flto
freebsd_CXXFLAGS += -flto
freebsd_LDFLAGS += -flto
endif
freebsd_release_CFLAGS=-O2
freebsd_release_CXXFLAGS=$(freebsd_release_CFLAGS)

4
depends/hosts/linux.mk
View File

@@ -2,10 +2,6 @@ linux_CFLAGS=-pipe -std=$(C_STANDARD)
linux_CXXFLAGS=-pipe -std=$(CXX_STANDARD)
ifneq ($(LTO),)
linux_CFLAGS += -flto
linux_CXXFLAGS += -flto
linux_LDFLAGS += -flto
linux_AR = $(host_toolchain)gcc-ar
linux_NM = $(host_toolchain)gcc-nm
linux_RANLIB = $(host_toolchain)gcc-ranlib

4
depends/hosts/mingw32.mk
View File

@@ -6,10 +6,6 @@ mingw32_CFLAGS=-pipe -std=$(C_STANDARD)
mingw32_CXXFLAGS=-pipe -std=$(CXX_STANDARD)
ifneq ($(LTO),)
mingw32_CFLAGS += -flto
mingw32_CXXFLAGS += -flto
mingw32_LDFLAGS += -flto
mingw32_AR = $(host_toolchain)gcc-ar
mingw32_NM = $(host_toolchain)gcc-nm
mingw32_RANLIB = $(host_toolchain)gcc-ranlib

4
depends/hosts/netbsd.mk
View File

@@ -2,10 +2,6 @@ netbsd_CFLAGS=-pipe -std=$(C_STANDARD)
netbsd_CXXFLAGS=-pipe -std=$(CXX_STANDARD)
ifneq ($(LTO),)
netbsd_CFLAGS += -flto
netbsd_CXXFLAGS += -flto
netbsd_LDFLAGS += -flto
netbsd_AR = $(host_toolchain)gcc-ar
netbsd_NM = $(host_toolchain)gcc-nm
netbsd_RANLIB = $(host_toolchain)gcc-ranlib

6
depends/hosts/openbsd.mk
View File

@@ -1,12 +1,6 @@
openbsd_CFLAGS=-pipe -std=$(C_STANDARD)
openbsd_CXXFLAGS=-pipe -std=$(CXX_STANDARD)
ifneq ($(LTO),)
openbsd_CFLAGS += -flto
openbsd_CXXFLAGS += -flto
openbsd_LDFLAGS += -flto
endif
openbsd_release_CFLAGS=-O2
openbsd_release_CXXFLAGS=$(openbsd_release_CFLAGS)