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-rw-r--r--configure.ac7
1 files changed, 2 insertions, 5 deletions
diff --git a/configure.ac b/configure.ac
index 8c0f0f26d..9f29a7734 100644
--- a/configure.ac
+++ b/configure.ac
@@ -50,14 +50,11 @@ AC_DEFINE_UNQUOTED(SYSTEM, ["$system"], [platform identifier ('cpu-os')])
test "$localstatedir" = '${prefix}/var' && localstatedir=/nix/var
-# Set default flags for nix (as per AC_PROG_CC/CXX docs),
-# while still allowing the user to override them from the command line.
-: ${CFLAGS="-O3"}
-: ${CXXFLAGS="-O3"}
+CFLAGS=
+CXXFLAGS=
AC_PROG_CC
AC_PROG_CXX
AC_PROG_CPP
-AX_CXX_COMPILE_STDCXX_17([noext], [mandatory])
AC_CHECK_TOOL([AR], [ar])