#31948: apple-gcc42: change behavior of the -isysroot option ---------------------------------+------------------------------------------ Reporter: royliu@… | Owner: macports-tickets@… Type: defect | Status: new Priority: Normal | Milestone: Component: ports | Version: 2.0.3 Keywords: haspatch | Port: apple-gcc42 ---------------------------------+------------------------------------------ When attempting to compile a port like `virtualbox` with the MacPorts `apple-gcc42` compiler, strange errors like this occur: {{{ /Developer/SDKs/MacOSX10.6.sdk/usr/include/stdarg.h:4:25: error: stdarg.h: No such file or directory }}} After further investigation, this is because the `-isysroot` option is set. Recall that doing so will cause the search for the compiler's own headers to occur in directories like (in the case of Xcode's own `llvm- gcc-4.2`): {{{ /Developer/SDKs/MacOSX10.6.sdk/Developer/usr/llvm-gcc-4.2/lib/gcc/i686 -apple-darwin11/4.2.1/include }}} Since we installed a MacPorts-based compiler, it will search in {{{ /Developer/SDKs/MacOSX10.6.sdk/Developer/opt/local/lib/apple- gcc42/gcc/i686-apple-darwin11/4.2.1/include }}} Such a directory clearly doesn't exist, and this causes the `apple-gcc42` compiler to not find headers like `stdarg.h`. The attached patch prevents appending of the SDK root to the compiler's own search paths. I believe that this is a reasonable "fix" to the problem because: 1. MacPorts doesn't put a bunch of compiler-specific stuff into the SDK directories themselves. 2. The patch is essentially saying "Regardless of the SDK, I want to use a common set of compiler headers". Again, this is not a bug, but more of a change tailor-made for the way that MacPorts distributes packages. -- Ticket URL: <https://trac.macports.org/ticket/31948> MacPorts <http://www.macports.org/> Ports system for Mac OS