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builder: add -fwrapv to fix UB overflow

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This commit is contained in:
Alexander Medvednikov 2023-08-29 23:39:26 +03:00
parent 80db36496b
commit c6412597ab
1 changed files with 7 additions and 0 deletions
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7
vlib/v/builder/cc.v
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@ -206,6 +206,13 @@ fn (mut v Builder) setup_ccompiler_options(ccompiler string) {
|| ccoptions.guessed_compiler == 'msvc'
ccoptions.is_cc_clang = ccompiler_file_name.contains('clang')
|| ccoptions.guessed_compiler == 'clang'
// Add -fwrapv to handle UB overflows
if (ccoptions.is_cc_gcc || ccoptions.is_cc_clang || ccoptions.is_cc_tcc)
&& v.pref.os in [.macos, .linux, .windows] {
ccoptions.args << '-fwrapv'
}
// For C++ we must be very tolerant
if ccoptions.guessed_compiler.contains('++') {
ccoptions.args << '-fpermissive'