build: Add -isystem and set specialized flags as a last configuration step
This change prevents global flags from interacting with library/feature
detection scripts.
Change-Id: Ic0dba06a9afd66a810172d4a512f35f6df6b25b6
Refs: #4296
diff --git a/wscript b/wscript
index beb9c21..af0748b 100644
--- a/wscript
+++ b/wscript
@@ -124,6 +124,8 @@
else:
conf.env['WITH_OSX_KEYCHAIN'] = False
+ conf.check_compiler_flags()
+
# Loading "late" to prevent tests to be compiled with profiling flags
conf.load('coverage')