I'm getting a strange compilation failure trying to build webkitgtk 2.4.5 with gcc-4.7 (which is stated as the low-end of the compiler requirement, and is already packaged in Homebrew). The error is as follows:
> rawrbookpro:webkitgtk-2.4.5 blast$ make
> CXX Source/WTF/wtf/libWTF_la-PrintStream.lo
> CXX Source/WTF/wtf/libWTF_la-RandomNumber.lo
> CXX Source/WTF/wtf/libWTF_la-FastMalloc.lo
> CXX Source/WTF/wtf/libWTF_la-RefCountedLeakCounter.lo
> CXX Source/WTF/wtf/libWTF_la-RunLoop.lo
> CXX Source/WTF/wtf/libWTF_la-SHA1.lo
> CXX Source/WTF/wtf/libWTF_la-SixCharacterHash.lo
> CXX Source/WTF/wtf/libWTF_la-StackBounds.lo
> CXX Source/WTF/wtf/libWTF_la-StringPrintStream.lo
> CXX Source/WTF/wtf/libWTF_la-TCSystemAlloc.lo
> CXX Source/WTF/wtf/libWTF_la-ThreadIdentifierDataPthreads.lo
> Source/WTF/wtf/FastMalloc.cpp: In member function 'void
> WTF::TCMalloc_PageHeap::initializeScavenger()':
> Source/WTF/wtf/FastMalloc.cpp:1953:56: error: expected primary-expression
> before '^' token
> Source/WTF/wtf/FastMalloc.cpp:1953:57: error: expected primary-expression
> before '{' token
> Source/WTF/wtf/FastMalloc.cpp:1953:80: error:
> 'dispatch_source_set_event_handler' was not declared in this scope
> CXX Source/WTF/wtf/libWTF_la-ThreadSpecificWin.lo
> CXX Source/WTF/wtf/libWTF_la-Threading.lo
> make: *** [Source/WTF/wtf/libWTF_la-FastMalloc.lo] Error 1
> make: *** Waiting for unfinished jobs....
Now, I know dispatch.h is being found and used, because line 1952 is
> dispatch_source_set_timer(m_scavengeTimer, startTime,
> scavengeDelayInNanoseconds, scavengeDelayInNanoseconds / 10);
and dispatch_source_set_timer is defined in the same header as
dispatch_source_set_event_handler.
jfpoole on Freenode's #macdev suggested gcc-4.7 might not understand blocks,
but there doesn't seem to be anything in gcc-4.7's configure script that
references blocks at all. I'm out of my element here, looking for other ideas.
Thanks!
-Devon
PS: Apple's version of clang fails the clang >= 3.3 version test, despite being
based on clang 3.4... kind of strange.
> rawrbookpro:~ blast$ clang --version
> Apple LLVM version 5.1 (clang-503.0.40) (based on LLVM 3.4svn)
> Target: x86_64-apple-darwin13.3.0
> Thread model: posix
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