Test commands executed by unix C compiler.

No functional changes intended.

Tests check that:
* Compiler is obtained from CC.
* cc is used as the default compiler.
  Currently not true as a Python build time compiler is used as the default.
* Preprocessor is obtained from CC when CPP is unspecified by adding -E.
* Preprocessor is obtained from CPP.
* cpp is used as the default preprocessor.
  Currently not true as Python build time preprocessor is used as the default.
* Shell word splitting rules are used to split CC.
* Shell word splitting rules are used to split CPP.
* Deprecation warnings are disabled during compilation.
* Preprocessing step includes CPPFLAGS.
* Compilation step includes both CFLAGS and CPPFLAGS, in that order.
* Macros from CFLAGS are defined only once.
  Currently not true as they are defined twice.
* Flags that would retain macros after preprocessing step are filtered out.
  Currently only partially true as they aren't filtered out from CPPFLAGS.
* Preprocessing step includes flag that preserves comments.
* Preprocessing step includes current working directory.
* Complete preprocessing command doesn't contain anything unexpected.
  Currently not true as Python build time CPPFLAGS are included as well.
* Complete build command doesn't contain anything unexpected.
  Currently not true as Python build time CFLAGS and CPPFLAGS are included as well.

1 files changed, 5 insertions, 1 deletions

diff --git a/giscanner/ccompiler.py b/giscanner/ccompiler.py
index 5db04535..24dcbcbf 100644
--- a/giscanner/ccompiler.py
+++ b/giscanner/ccompiler.py
@@ -34,6 +34,10 @@ from distutils.sysconfig import customize_compiler
 from . import utils
 
 
+# Flags that retain macros in preprocessed output.
+FLAGS_RETAINING_MACROS = ['-g3', '-ggdb3', '-gstabs3', '-gcoff3', '-gxcoff3', '-gvms3']
+
+
 class CCompiler(object):
 
     compiler_cmd = ''
@@ -376,6 +380,6 @@ class CCompiler(object):
             else:
                 # We expect the preprocessor to remove macros. If debugging is turned
                 # up high enough that won't happen, so don't add those flags. Bug #720504
-                if option not in ['-g3', '-ggdb3', '-gstabs3', '-gcoff3', '-gxcoff3', '-gvms3']:
+                if option not in FLAGS_RETAINING_MACROS:
                     other_options.append(option)
         return (includes, macros, other_options)