Allow Mac precompiled headers to be disabled based on a GYP variable.
Review URL: http://codereview.chromium.org/42133
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@11557 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/build/common.gypi b/build/common.gypi
index dbcf3b4..0da4cd39 100644
--- a/build/common.gypi
+++ b/build/common.gypi
@@ -4,7 +4,26 @@
{
'variables': {
+ # .gyp files should set chromium_code to 1 if they build Chromium-specific
+ # code, as opposed to external code. This variable is used to control
+ # such things as the set of warnings to enable, and whether warnings are
+ # treated as errors.
'chromium_code%': 0,
+
+ # Variables expected to be overriden on the GYP command line (-D) or by
+ # ~/.gyp/include.gypi.
+
+ # Override chromium_mac_pch and set it to 0 to suppress the use of
+ # precompiled headers on the Mac. Prefix header injection may still be
+ # used, but prefix headers will not be precompiled. This is useful when
+ # using distcc to distribute a build to compile slaves that don't
+ # share the same compiler executable as the system driving the compilation,
+ # because precompiled headers rely on pointers into a specific compiler
+ # executable's image. Setting this to 0 is needed to use an experimental
+ # Linux-Mac cross compiler distcc farm.
+ 'chromium_mac_pch%': 1,
+
+ # Override branding to select the desired branding flavor.
'branding%': 'Chromium',
},
'target_defaults': {
@@ -77,7 +96,6 @@
'GCC_DYNAMIC_NO_PIC': 'YES',
'GCC_ENABLE_PASCAL_STRINGS': 'NO',
'GCC_INLINES_ARE_PRIVATE_EXTERN': 'YES',
- 'GCC_PRECOMPILE_PREFIX_HEADER': 'YES',
'GCC_SYMBOLS_PRIVATE_EXTERN': 'YES',
'GCC_TREAT_WARNINGS_AS_ERRORS': 'YES',
'GCC_VERSION': '4.2',
@@ -87,6 +105,10 @@
'SDKROOT': 'macosx10.5',
'USE_HEADERMAP': 'NO',
'WARNING_CFLAGS': ['-Wall', '-Wendif-labels'],
+ 'conditions': [
+ ['chromium_mac_pch', {'GCC_PRECOMPILE_PREFIX_HEADER': 'YES'},
+ {'GCC_PRECOMPILE_PREFIX_HEADER': 'NO'}],
+ ],
},
'target_conditions': [
['_type=="shared_library"', {
