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| author | Adam Borowski <kilobyte@angband.pl> | 2013-06-24 14:05:14 +0200 |
|---|---|---|
| committer | Adam Borowski <kilobyte@angband.pl> | 2013-06-24 14:05:14 +0200 |
| commit | e19fa701fad8b44cc1e67a56c6402855838d758b (patch) | |
| tree | 7e8b597947af69dcbbf5ba4e66297820a584b765 /crawl-ref/source/Makefile | |
| parent | dc940a1eb3af48d8da4e292a728aed93c53cb369 (diff) | |
| download | crawl-ref-e19fa701fad8b44cc1e67a56c6402855838d758b.tar.gz crawl-ref-e19fa701fad8b44cc1e67a56c6402855838d758b.zip | |
Let LTO=y support clang.
Beware, I haven't seen a single successful build yet. Versions of clang
prior to 3.3, including 3.3 without a recent patch, fail early, while
current 3.3 swapped for hours before OOMing (8GB ram + 6GB swap).
In comparison, gcc-4.7 on 256MB raspi swaps for 124 minutes before
succeeding. But hey, it's still a step forward.
Diffstat (limited to 'crawl-ref/source/Makefile')
| -rw-r--r-- | crawl-ref/source/Makefile | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/crawl-ref/source/Makefile b/crawl-ref/source/Makefile index 3a11feb772..fd0d812e99 100644 --- a/crawl-ref/source/Makefile +++ b/crawl-ref/source/Makefile @@ -534,10 +534,16 @@ else endif ifdef LTO -CFOPTIMIZE += -flto=jobserver -fwhole-program - # FIXME: this check is fragile, and should be done via a full compile test. - ifeq ($(shell $(GXX) -x c++ /dev/null -fno-fat-lto-objects 2>&1 | grep 'unrecognized command line option'),) - CFOPTIMIZE += -fno-fat-lto-objects + ifeq ($(shell $(GXX) -v 2>&1|grep clang),) + CFOPTIMIZE += -flto=jobserver -fwhole-program + # FIXME: this check is fragile, and should be done via a full compile test. + ifeq ($(shell $(GXX) -x c++ /dev/null -fno-fat-lto-objects 2>&1 | grep 'unrecognized command line option'),) + CFOPTIMIZE += -fno-fat-lto-objects + endif + else + # Clang uses a different syntax than gcc, using -O4 instead. This means + # you can't select a different level of optimization to go with LTO. + CFOPTIMIZE := $(patsubst -O%,,$(CFOPTIMIZE)) -O4 endif endif |