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compiler: guess cc kind for -prod builds, to know when to add -flto

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This commit is contained in:
Delyan Angelov 2019-12-03 12:58:24 +02:00 committed by Alexander Medvednikov
parent d308fef0c2
commit 0a8d2d5dc7
1 changed files with 19 additions and 2 deletions
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21
vlib/compiler/cc.v
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@ -146,13 +146,30 @@ fn (v mut V) cc() {
debug_mode := v.pref.is_debug
mut debug_options := '-g'
mut optimization_options := '-O2'
if v.pref.ccompiler.contains('clang') {
mut guessed_compiler := v.pref.ccompiler
if guessed_compiler == 'cc' && v.pref.is_prod {
// deliberately guessing only for -prod builds for performance reasons
if ccversion := os.exec('cc --version') {
if ccversion.exit_code == 0 {
if ccversion.output.contains('This is free software;')
&& ccversion.output.contains('Free Software Foundation, Inc.') {
guessed_compiler = 'gcc'
}
if ccversion.output.contains('clang version '){
guessed_compiler = 'clang'
}
}
}
}
if v.pref.ccompiler.contains('clang') || guessed_compiler == 'clang' {
if debug_mode {
debug_options = '-g -O0 -no-pie'
}
optimization_options = '-O3 -flto'
}
if v.pref.ccompiler.contains('gcc') {
if v.pref.ccompiler.contains('gcc') || guessed_compiler == 'gcc' {
if debug_mode {
debug_options = '-g3 -no-pie'
}