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Don't hardcode the -O2 compiler flag

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autoconf authors apparently decided that setting `-O2` by default was a good idea. I disagree, and Nix has its own way of deciding that (with `OPTIMIZE={0,1}`). Explicitly set `CFLAGS` and `CXXFLAGS` in the configure script to disable that behaviour.

Fix #9965
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Théophane Hufschmitt 2024-02-09 06:27:24 +01:00 committed by GitHub
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commit 1fe7b01669
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configure.ac
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@ -47,6 +47,10 @@ AC_DEFINE_UNQUOTED(SYSTEM, ["$system"], [platform identifier ('cpu-os')])
# State should be stored in /nix/var, unless the user overrides it explicitly.
test "$localstatedir" = '${prefix}/var' && localstatedir=/nix/var
# Assign a default value to C{,XX}FLAGS as the default configure script sets them
# to -O2 otherwise, which we don't want to have hardcoded
CFLAGS=${CFLAGS-""}
CXXFLAGS=${CXXFLAGS-""}
AC_PROG_CC
AC_PROG_CXX