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- Log ----------------------------------------------------------------- commit 86f6dccd0b106765670265e0cf0c7ce2e6a84b55 Author: Raymond Toy toy.raymond@gmail.com Date: Sat Jun 2 15:02:00 2012 -0700

Add comments about using clang instead of gcc on x86.

diff --git a/src/lisp/Config.x86_common b/src/lisp/Config.x86_common index 5ed23de..0fa9bb3 100644 --- a/src/lisp/Config.x86_common +++ b/src/lisp/Config.x86_common @@ -45,7 +45,24 @@ ifdef FEATURE_UNICODE CPP_DEFINE_OPTIONS += -DUNICODE endif

+# Default to using gcc CC = gcc + +# But we can use clang. +# +# However, clang seems to want to use SSE instructions in various +# places, but we DON'T want that because we need a lisp that will run +# on chips without sse. +# +# But on Mac, every machine has SSE2 so we can use SSE2. However, +# there's some code path through GC or allocation where we aren't +# saving the FPU state so after GC or allocation, some XMM FP +# registers are corrupted. +# +# Got that? + +#CC = clang -mno-sse + LD = ld

ifeq ($(filter 2% 3%, $(shell $(CC) -dumpversion)),) @@ -70,3 +87,7 @@ DEPEND_FLAGS = # -ffloat-store and -fno-strict-aliasing anymore. e_rem_pio2.o : e_rem_pio2.c $(CC) -c $(CFLAGS) $(CPPFLAGS) $< + +# +gencgc.o : gencgc.c + $(CC) -c -mno-sse $(CFLAGS) $(CPPFLAGS) $< \ No newline at end of file

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Summary of changes: src/lisp/Config.x86_common | 21 +++++++++++++++++++++ 1 files changed, 21 insertions(+), 0 deletions(-)

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