llvm-build: Adopt generation of LLVM_LIBS_TO_EXPORT. Patch by

Brad King.

Move `LLVM_LIBS_TO_EXPORT` over to Makefile.llvmbuild and generate it
from `llvm-build` using the same logic used to export the dependencies
of these libraries.  This avoids depending on `llvm-config`.

This refactoring was originally motivated by issue #24154 due to commit
r243297 (Fix `llvm-config` to emit the linker flag for the combined
shared object, 2015-07-27) changing the output of `llvm-config --libs`
to not have the individual libraries when we configure with
`--enable-shared`.  That change was reverted by r244108 but this
refactoring makes sense on its own anyway.

llvm-svn: 245717

1 files changed, 16 insertions, 2 deletions

diff --git a/llvm/utils/llvm-build/llvmbuild/main.py b/llvm/utils/llvm-build/llvmbuild/main.py
index 5742b05d4f9..6a2da754c3b 100644
--- a/llvm/utils/llvm-build/llvmbuild/main.py
+++ b/llvm/utils/llvm-build/llvmbuild/main.py
@@ -640,7 +640,7 @@ set_property(TARGET %s PROPERTY IMPORTED_LINK_INTERFACE_LIBRARIES %s)\n""" % (
 
         f.close()
 
-    def write_make_fragment(self, output_path):
+    def write_make_fragment(self, output_path, enabled_optional_components):
         """
         write_make_fragment(output_path) -> None
 
@@ -706,6 +706,19 @@ set_property(TARGET %s PROPERTY IMPORTED_LINK_INTERFACE_LIBRARIES %s)\n""" % (
             f.write("%s:\n" % (mk_quote_string_for_target(dep),))
         f.write('endif\n')
 
+        f.write("""
+# List of libraries to be exported for use by applications.
+# See 'cmake/modules/Makefile'.
+LLVM_LIBS_TO_EXPORT :=""")
+        self.foreach_cmake_library(
+            lambda ci:
+                f.write(' \\\n  %s' % ci.get_prefixed_library_name())
+            ,
+            enabled_optional_components,
+            skip_disabled = True
+            )
+        f.write('\n')
+
         f.close()
 
 def add_magic_target_components(parser, project, opts):
@@ -929,7 +942,8 @@ given by --build-root) at the same SUBPATH""",
 
     # Write out the make fragment, if requested.
     if opts.write_make_fragment:
-        project_info.write_make_fragment(opts.write_make_fragment)
+        project_info.write_make_fragment(opts.write_make_fragment,
+                                         opts.optional_components)
 
     # Write out the cmake fragment, if requested.
     if opts.write_cmake_fragment: