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[libc] Set -fno-math-errno for FMA #125752

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[libc] Set -fno-math-errno for FMA #125752

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8 changes: 8 additions & 0 deletions libc/src/__support/FPUtil/CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -122,6 +122,10 @@ add_header_library(
libc.src.__support.FPUtil.generic.fma
FLAGS
FMA_OPT
COMPILE_OPTIONS
# We need to set -fno-math-errno so __builtin_fma* generate
# the fused-mutliply-add instructions rather than an fma call.
-fno-math-errno
)

add_header_library(
Expand All @@ -132,6 +136,10 @@ add_header_library(
libc.src.__support.common
FLAGS
FMA_OPT
COMPILE_OPTIONS
# We need to set -fno-math-errno so __builtin_fma* generate
# the fused-mutliply-add instructions rather than an fma call.
-fno-math-errno
)

add_header_library(
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