Bug 159760 – Build failed with ENABLE_STREAMS_API=OFF & ENABLE_WEB_RTC=OFF

• Status: NEW
• Component: JavaScriptCore

[Sergio Villar Senin]

I'm getting this error:

DerivedSources/WebCore/WebCoreJSBuiltinInternals.cpp: In member function ‘void WebCore::JSBuiltinInternalFunctions::initialize(WebCore::JSDOMGlobalObject&)’:
DerivedSources/WebCore/WebCoreJSBuiltinInternals.cpp:125:103: error: no matching function for call to ‘ArrayLengthHelperFunction(JSC::JSGlobalObject::GlobalPropertyInfo [0])’
     globalObject.addStaticGlobals(staticGlobals, WTF_ARRAY_LENGTH(staticGlobals));
                                                                                                       ^
DerivedSources/WebCore/WebCoreJSBuiltinInternals.cpp:125:103: note: candidates are:
In file included from ../../Source/WTF/wtf/FastMalloc.h:26:0,
                 from ../../Source/WebCore/config.h:75,
                 from DerivedSources/WebCore/WebCoreJSBuiltinInternals.cpp:36:
../../Source/WTF/wtf/StdLibExtras.h:172:42: note: template<class T, long unsigned int Size> char (& WTF::ArrayLengthHelperFunction(T (&)[Size]))[Size]
 template<typename T, size_t Size> char (&ArrayLengthHelperFunction(T (&)[Size]))[Size];
                                          ^
../../Source/WTF/wtf/StdLibExtras.h:172:42: note:   template argument deduction/substitution failed:
../../Source/WTF/wtf/StdLibExtras.h:175:29: note: template<class T> char (& WTF::ArrayLengthHelperFunction(T (&)[0]))[0]
 template<typename T> char (&ArrayLengthHelperFunction(T (&)[0]))[0];
                             ^
../../Source/WTF/wtf/StdLibExtras.h:175:29: note:   template argument deduction/substitution failed:
DerivedSources/WebCore/WebCoreJSBuiltinInternals.cpp:125:103: note:   template argument ‘-1’ does not match ‘#‘integer_cst’ not supported by dump_decl#<declaration error>’
     globalObject.addStaticGlobals(staticGlobals, WTF_ARRAY_LENGTH(staticGlobals));

Looks like (in the generated code) that the array is empty when disabling both build flags. By enabling either of them the build goes on smoothly.