From 0b5a9c3dfc48c515de3384b0e8aca5b3822b287c Mon Sep 17 00:00:00 2001 From: Ryan Crosby Date: Wed, 1 Aug 2018 15:03:50 +1000 Subject: [PATCH] Updated README.md --- README.md | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/README.md b/README.md index 19ae1ac..dc0a48e 100644 --- a/README.md +++ b/README.md @@ -95,9 +95,12 @@ To build the project without all of the above instructions introduced with SSE2, `CFLAGS=-DNOSSE2 make` -This flag is automatically enabled if the `__SSE__` flag is present but `__SSE2__` is absent. +`NOSSE2` is automatically enabled if the `__SSE__` flag is present but `__SSE2__` is absent. This means `NOSSE2` shouldn't need to be manually specified when compiling on Clang or GCC on non-SSE2 processors. +On MSC, `NOSSE2` is automatically enabled if the `_M_IX86_FP` flag is set to `1` (indicating SSE support, but no SSE2 support). +MSC will set this by default for all x86 processors. + #### 'Target specific option mismatch' error Some 32-bit versions of gcc (e.g. the version used in Ubuntu 14.04) may show the following error while compiling the PoC: