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configure.in: add -fwrapv to gcc and compatible compilers

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Add the -fwrapv to gcc and compatible C compilers, to enforce
deterministic 2's-complement behavior with regards to signed and
unsigned integer types.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
This commit is contained in:
H. Peter Anvin 2016-02-27 00:15:13 -08:00
parent 52ae33a2cb
commit 8d9f591005
1 changed files with 1 additions and 0 deletions
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configure.in
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@ -79,6 +79,7 @@ dnl If we have gcc, add appropriate options
PA_ADD_CFLAGS([-W])
PA_ADD_CFLAGS([-Wall])
PA_ADD_CFLAGS([-std=c99])
PA_ADD_CFLAGS([-fwrapv])
dnl Look for programs...
AC_CHECK_PROGS(NROFF, nroff, false)