Clang: fix for -flto argument (#11961)
Starting with the recent #11926 Makefile specifies `-flto=auto` which is unsupported on clang. Additionally, detecting clang correctly requires actually running it, since on MacOS gcc can be an alias for clang.
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@ -15,9 +15,14 @@
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release_hdr := $(shell sh -c './mkreleasehdr.sh')
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uname_S := $(shell sh -c 'uname -s 2>/dev/null || echo not')
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uname_M := $(shell sh -c 'uname -m 2>/dev/null || echo not')
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CLANG := $(findstring clang,$(shell sh -c '$(CC) --version | head -1'))
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OPTIMIZATION?=-O3
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ifeq ($(OPTIMIZATION),-O3)
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REDIS_CFLAGS+=-flto=auto
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ifeq (clang,$(CLANG))
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REDIS_CFLAGS+=-flto
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else
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REDIS_CFLAGS+=-flto=auto
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endif
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REDIS_LDFLAGS+=-flto
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endif
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DEPENDENCY_TARGETS=hiredis linenoise lua hdr_histogram fpconv
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@ -28,7 +33,7 @@ STD=-pedantic -DREDIS_STATIC=''
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# Use -Wno-c11-extensions on clang, either where explicitly used or on
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# platforms we can assume it's being used.
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ifneq (,$(findstring clang,$(CC)))
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ifeq (clang,$(CLANG))
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STD+=-Wno-c11-extensions
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else
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ifneq (,$(findstring FreeBSD,$(uname_S)))
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