nixpkgs/pkgs/development/compilers/llvm/3.9/llvm-outputs.patch
Vladimír Čunát d2965a7d85 llvm-3.9: move shared libLLVM to a separate output
Fixes #18840: too large closure of mesa_drivers.

Tested atop 16.09:
 - clang compiles a hello-world app;
 - mesa seems to link OK;
 - ispc builds.

Size comparison:
 - 80 MB of full llvm-3.7 on 16.03;
 - 200 MB of full llvm-3.9 on 16.09 before this patch;
 - 50 MB of libLLVM after this commit.
2016-09-24 18:32:45 +02:00

27 lines
1.0 KiB
Diff

diff --git a/tools/llvm-config/llvm-config.cpp b/tools/llvm-config/llvm-config.cpp
index 94d426b..37f7794 100644
--- a/tools/llvm-config/llvm-config.cpp
+++ b/tools/llvm-config/llvm-config.cpp
@@ -333,6 +333,21 @@ int main(int argc, char **argv) {
ActiveIncludeOption = "-I" + ActiveIncludeDir;
}
+ /// Nix-specific multiple-output handling: override ActiveLibDir if --link-shared
+ if (!IsInDevelopmentTree) {
+ bool WantShared = true;
+ for (int i = 1; i < argc; ++i) {
+ StringRef Arg = argv[i];
+ if (Arg == "--link-shared")
+ WantShared = true;
+ else if (Arg == "--link-static")
+ WantShared = false; // the last one wins
+ }
+
+ if (WantShared)
+ ActiveLibDir = std::string("@lib@") + "/lib" + LLVM_LIBDIR_SUFFIX;
+ }
+
/// We only use `shared library` mode in cases where the static library form
/// of the components provided are not available; note however that this is
/// skipped if we're run from within the build dir. However, once installed,