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* [modules] Simplify -cc1 interface for enabling implicit module maps.Richard Smith2015-06-161-2/+2
| | | | | | | | | | | | | We used to have a flag to enable module maps, and two more flags to enable implicit module maps. This is all redundant; we don't need any flag for enabling module maps in the abstract, and we don't usually have -fno- flags for -cc1. We now have just a single flag, -fimplicit-module-maps, that enables implicitly searching the file system for module map files and loading them. The driver interface is unchanged for now. We should probably rename -fmodule-maps to -fimplicit-module-maps at some point. llvm-svn: 239789
* Require a module.map file to load a moduleBen Langmuir2014-01-221-1/+1
| | | | | | | | Removes some old code that allowed a module to be loaded from a pcm file even if the module.map could not be found. Also update a number of tests that relied on the old behavior. llvm-svn: 199852
* <rdar://problem/10796651> Introduce configuration macros into module maps.Douglas Gregor2013-03-201-0/+28
Configuration macros are macros that are intended to alter how a module works, such that we need to build different module variants for different values of these macros. A module can declare its configuration macros, in which case we will complain if the definition of a configation macro on the command line (or lack thereof) differs from the current preprocessor state at the point where the module is imported. This should eliminate some surprises when enabling modules, because "#define CONFIG_MACRO ..." followed by "#include <module/header.h>" would silently ignore the CONFIG_MACRO setting. At least it will no longer be silent about it. Configuration macros are eventually intended to help reduce the number of module variants that need to be built. When the list of configuration macros for a module is exhaustive, we only need to consider the settings for those macros when building/finding the module, which can help isolate modules for various project-specific -D flags that should never affect how modules are build (but currently do). llvm-svn: 177466
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