From fe5b9e22420aa9acdd5fcf61dc236702c1784db7 Mon Sep 17 00:00:00 2001 From: Tom Henderson Date: Wed, 28 May 2014 23:03:23 -0700 Subject: [PATCH] bug 1868: enable -Wstrict-overflow only for newer gcc versions --- wscript | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/wscript b/wscript index 88255d532..d34b09f36 100644 --- a/wscript +++ b/wscript @@ -29,6 +29,10 @@ modules_enabled = ['all_modules'] examples_enabled = False tests_enabled = False +# Bug 1868: be conservative about -Wstrict-overflow for optimized builds +# on older compilers; it can generate spurious warnings. +min_cc_version_warn_strict_overflow = ('4', '8', '2') + # Get the information out of the NS-3 configuration file. config_file_exists = False (config_file_exists, modules_enabled, examples_enabled, tests_enabled) = read_config_file() @@ -326,7 +330,8 @@ def configure(conf): if conf.check_compilation_flag('-march=native'): env.append_value('CXXFLAGS', '-march=native') env.append_value('CXXFLAGS', '-fstrict-overflow') - env.append_value('CXXFLAGS', '-Wstrict-overflow=5') + if conf.env['CC_VERSION'] >= min_cc_version_warn_strict_overflow: + env.append_value('CXXFLAGS', '-Wstrict-overflow=5') if sys.platform == 'win32': env.append_value("LINKFLAGS", "-Wl,--enable-runtime-pseudo-reloc")