[llvm] 58d630f - Revert "[gn build] port bc39d7bdd497 (libclang.map -> libclang.exports)"

[Nico Weber via llvm-commits]

Author: Nico Weber
Date: 2022-08-25T07:08:44-04:00
New Revision: 58d630fbfab11a2847bd2970bcff897d860d36eb

URL: https://github.com/llvm/llvm-project/commit/58d630fbfab11a2847bd2970bcff897d860d36eb
DIFF: https://github.com/llvm/llvm-project/commit/58d630fbfab11a2847bd2970bcff897d860d36eb.diff

LOG: Revert "[gn build] port bc39d7bdd497 (libclang.map -> libclang.exports)"

This reverts commit 94c00c10e837aded6a6b15fe84c12f1ced4d856d.
bc39d7bdd497 was reverted in 0f28d4856630.

Added: 
    

Modified: 
    llvm/utils/gn/secondary/clang/tools/libclang/BUILD.gn

Removed: 
    


################################################################################
diff  --git a/llvm/utils/gn/secondary/clang/tools/libclang/BUILD.gn b/llvm/utils/gn/secondary/clang/tools/libclang/BUILD.gn
index 41e98ec368485..6f2c19c613a36 100644
--- a/llvm/utils/gn/secondary/clang/tools/libclang/BUILD.gn
+++ b/llvm/utils/gn/secondary/clang/tools/libclang/BUILD.gn
@@ -7,14 +7,24 @@ import("//llvm/version.gni")
 # - a build target copying the Python bindings
 # - the GN build doesn't have LIBCLANG_BUILD_STATIC
 
+action("linker_script_to_exports") {
+  script = "linker-script-to-export-list.py"
+  inputs = [ "libclang.map" ]
+  outputs = [ "$target_gen_dir/libclang.exports" ]
+  args = [
+    rebase_path(inputs[0], root_build_dir),
+    rebase_path(outputs[0], root_build_dir),
+  ]
+}
+
 symbol_exports("exports") {
-  exports_file = "libclang.exports"
+  deps = [ ":linker_script_to_exports" ]
+  exports_file = "$target_gen_dir/libclang.exports"
 }
 
 shared_library("libclang") {
   configs += [ "//llvm/utils/gn/build:clang_code" ]
   deps = [
-    ":exports",
     "//clang/include/clang/Config",
     "//clang/lib/AST",
     "//clang/lib/Basic",
@@ -29,6 +39,13 @@ shared_library("libclang") {
     "//llvm/lib/Support",
     "//llvm/lib/Target:TargetsToBuild",
   ]
+  if (current_os == "win" || current_os == "mac") {
+    deps += [ ":exports" ]
+  } else {
+    inputs = [ "libclang.map" ]
+    ldflags =
+        [ "-Wl,--version-script," + rebase_path(inputs[0], root_build_dir) ]
+  }
   if (clang_enable_arcmt) {
     deps += [ "//clang/lib/ARCMigrate" ]
   }