git: 9083fa424c08 - 2025Q1 - lang/ldc: fix build with LLVM_DEFAULT=19

The branch 2025Q1 has been updated by dim:

URL: https://cgit.FreeBSD.org/ports/commit/?id=9083fa424c08d775d58d62500ae7b04da34e0300

commit 9083fa424c08d775d58d62500ae7b04da34e0300
Author:     Dimitry Andric <dim@FreeBSD.org>
AuthorDate: 2025-01-25 16:45:16 +0000
Commit:     Dimitry Andric <dim@FreeBSD.org>
CommitDate: 2025-01-31 23:02:34 +0000

    lang/ldc: fix build with LLVM_DEFAULT=19
    
    When building lang/ldc with LLVM_DEFAULT=19, linking ldc-profdata fails with:
    
      FAILED: bin/ldc-profdata
      : && /usr/local/llvm19/bin/clang++ -O2 -pipe -fPIC -fstack-protector-strong -fno-strict-aliasing -DDMDV2 -O2 -pipe -fPIC -fstack-protector-strong -fno-strict-aliasing   -DNDEBUG -fstack-protector-strong     -Xlinker --dependency-file=tools/CMakeFiles/ldc-profdata.dir/link.d tools/CMakeFiles/ldc-profdata.dir/ldc-profdata/llvm-profdata-19.1.cpp.o -o bin/ldc-profdata  -lLLVM-19  -L/usr/local/llvm19/lib && :
      ld: error: undefined symbol: pthread_create
      >>> referenced by llvm-profdata-19.1.cpp
      >>>               tools/CMakeFiles/ldc-profdata.dir/ldc-profdata/llvm-profdata-19.1.cpp.o:(std::__1::future<void> std::__1::__make_async_assoc_state[abi:sn190107]<void, std::__1::__async_func<std::__1::function<void ()>>>(std::__1::__async_func<std::__1::function<void ()>>&&))
      clang++: error: linker command failed with exit code 1 (use -v to see invocation)
    
    This is because the link command line is missing -lpthread. For the
    tools/ subdirectory, use the CMAKE_THREAD_LIBS_INIT macro to fix the
    target_link_libraries() directive.
    
    PR:             284344
    Approved by:    acm (maintainer)
    MFH:            2025Q1
    
    (cherry picked from commit c580801b319fde451d9e12648519ee83a5e64231)
---
 lang/ldc/files/patch-tools_CMakeLists.txt | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/lang/ldc/files/patch-tools_CMakeLists.txt b/lang/ldc/files/patch-tools_CMakeLists.txt
new file mode 100644
index 000000000000..52ac65f48f9b
--- /dev/null
+++ b/lang/ldc/files/patch-tools_CMakeLists.txt
@@ -0,0 +1,11 @@
+--- tools/CMakeLists.txt.orig	2024-12-15 13:48:09 UTC
++++ tools/CMakeLists.txt
+@@ -37,7 +37,7 @@ if(LDC_BUNDLE_LLVM_TOOLS)
+         COMPILE_FLAGS "${LLVM_CXXFLAGS} ${LDC_CXXFLAGS}"
+         LINK_FLAGS "${SANITIZE_LDFLAGS}"
+       )
+-      target_link_libraries(ldc-profdata ${LLVM_LIBRARIES} ${CMAKE_DL_LIBS} ${LLVM_LDFLAGS})
++      target_link_libraries(ldc-profdata ${LLVM_LIBRARIES} ${CMAKE_DL_LIBS} ${LLVM_LDFLAGS} ${CMAKE_THREAD_LIBS_INIT})
+       install(TARGETS ldc-profdata DESTINATION ${CMAKE_INSTALL_PREFIX}/bin)
+ 
+       # Set path to executable, used by the lit testsuite.