[gentoo-commits] repo/proj/guru:master commit in: dev-lang/swift/

["David Roman" <davidroman96@gmail.com>]

commit:     e725aa5030c89bec2b8883784d725568250d19b8
Author:     Marco Rebhan <me <AT> dblsaiko <DOT> net>
AuthorDate: Mon Feb 10 19:54:17 2025 +0000
Commit:     David Roman <davidroman96 <AT> gmail <DOT> com>
CommitDate: Mon Feb 10 23:46:30 2025 +0000
URL:        https://gitweb.gentoo.org/repo/proj/guru.git/commit/?id=e725aa50

dev-lang/swift: Always use libstdc++ when building Swift 5

Closes: https://bugs.gentoo.org/949266
Signed-off-by: Marco Rebhan <me <AT> dblsaiko.net>

 dev-lang/swift/swift-5.10.1-r3.ebuild | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/dev-lang/swift/swift-5.10.1-r3.ebuild b/dev-lang/swift/swift-5.10.1-r3.ebuild
index 09858bfb7..9bf1f8049 100644
--- a/dev-lang/swift/swift-5.10.1-r3.ebuild
+++ b/dev-lang/swift/swift-5.10.1-r3.ebuild
@@ -196,6 +196,15 @@ src_compile() {
 		'-DSWIFT_USE_LINKER=lld',
 		'-DLLVM_USE_LINKER=lld',
 
+		# Bug 949266
+		# Building Swift with llvm-core/clang-common[default-libcxx] fails
+		# with missing symbol errors due to some libraries getting linked
+		# against libc++ and some against libstdc++, and when the Swift llvm is
+		# told to link against libc++ (via -DCLANG_DEFAULT_CXX_STDLIB=libc++),
+		# Swift fails to load the c++ symbols later in the build. Therefore,
+		# unconditionally force libstdc++.
+		'-DCMAKE_CXX_FLAGS=-stdlib=libstdc++',
+
 		# We don't need to build any test code or test executables, which Swift
 		# (and some components) does by default.
 		'-DBUILD_TESTING:BOOL=NO',