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Config.in: update BR2_OPTIMIZE_FAST prompt and help text

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Update label as suggested by Stéphane Veyret, as -Ofast is potentially
dangerous, and may break packages.

Fixes:

 - https://bugs.buildroot.org/show_bug.cgi?id=13046

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
(cherry picked from commit 3e186cee00)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
This commit is contained in:
Fabrice Fontaine 2020-07-16 23:44:51 +02:00 committed by Peter Korsgaard
parent 293d90b555
commit b947b73090
1 changed files with 3 additions and 2 deletions
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Config.in
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@ -516,13 +516,14 @@ config BR2_OPTIMIZE_S
This is the default.
config BR2_OPTIMIZE_FAST
bool "optimize for fast"
bool "optimize for fast (may break packages!)"
depends on BR2_TOOLCHAIN_GCC_AT_LEAST_4_6
help
Optimize for fast. Disregard strict standards
compliance. -Ofast enables all -O3 optimizations. It also
enables optimizations that are not valid for all
standard-compliant programs. It turns on -ffast-math and the
standard-compliant programs, so be careful, as it may break
some packages. It turns on -ffast-math and the
Fortran-specific -fstack-arrays, unless -fmax-stack-var-size
is specified, and -fno-protect-parens.