diff options
| author | Chris Lattner <sabre@nondot.org> | 2008-03-09 01:36:43 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2008-03-09 01:36:43 +0000 |
| commit | 177b1c72a0c0edef5467905cbb302539146c3cf2 (patch) | |
| tree | 6eefbd9122205b841bda94174619048f49cf197a /NOTES.txt | |
| parent | 6fd9fa15551809dac4b45f751583065cdd116dfb (diff) | |
secondary targets are gone, simplify this.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@48067 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'NOTES.txt')
| -rw-r--r-- | NOTES.txt | 38 |
1 files changed, 5 insertions, 33 deletions
@@ -102,39 +102,11 @@ TODO: New language feature: Configuration queries: // Specifying targets: -triple and -arch ===---------------------------------------------------------------------===// -The clang supports "-triple" and "-arch" options. At most one -triple option may -be specified, while multiple -arch options can be specified. Both are optional. +The clang supports "-triple" and "-arch" options. At most one -triple and one +-arch option may be specified. Both are optional. The "selection of target" behavior is defined as follows: -(1) If the user does not specify -triple: - - (a) If no -arch options are specified, the target triple used is the host - triple (in llvm/Config/config.h). - - (b) If one or more -arch's are specified (and no -triple), then there is - one triple for each -arch, where the specified arch is substituted - for the arch in the host triple. Example: - - host triple = i686-apple-darwin9 - command: clang -arch ppc -arch ppc64 ... - triples used: ppc-apple-darwin9 ppc64-apple-darwin9 - -(2) The user does specify a -triple (only one allowed): - - (a) If no -arch options are specified, the triple specified by -triple - is used. E.g clang -triple i686-apple-darwin9 - - (b) If one or more -arch options are specified, then the triple specified - by -triple is used as the primary target, and the arch's specified - by -arch are used to create secondary targets. For example: - - clang -triple i686-apple-darwin9 -arch ppc -arch ppc64 - - has the following targets: - - i686-apple-darwin9 (primary target) - ppc-apple-darwin9 (secondary target) - ppc64-apple-darwin9 (secondary target) - -The secondary targets are used in the 'portability' model (see below). +(1) If the user does not specify -triple, we default to the host triple. +(2) If the user specifies a -arch, that overrides the arch in the host or + specified triple. |